LMH6503MA/NOPB [TI]

宽带、低功耗、线性可变增益放大器 | D | 14 | -40 to 85;
LMH6503MA/NOPB
型号: LMH6503MA/NOPB
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

宽带、低功耗、线性可变增益放大器 | D | 14 | -40 to 85

放大器 光电二极管
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LMH6503  
www.ti.com  
SNOSA78E OCTOBER 2003REVISED APRIL 2013  
LMH6503 Wideband, Low Power, Linear Variable Gain Amplifier  
Check for Samples: LMH6503  
1
FEATURES  
DESCRIPTION  
The LMH™6503 is  
a wideband, DC coupled,  
23  
VS = ±5V, TA = 25°C, RF = 1k, RG = 174, RL =  
100, AV = AV(MAX) = 10, Typical Values Unless  
Specified.  
differential input, voltage controlled gain stage  
followed by a high-speed current feedback Op Amp  
which can directly drive a low impedance load. Gain  
adjustment range is more than 70dB for up to 10MHz.  
-3dB BW 135MHz  
Gain Control BW 100MHz  
Maximum gain is set by external components and the  
gain can be reduced all the way to cut-off. Power  
consumption is 370mW with a speed of 135MHz .  
Output referred DC offset voltage is less than 350mV  
over the entire gain control voltage range. Device-to-  
device Gain matching is within 0.7dB at maximum  
gain. Furthermore, gain at any VG is tested and the  
tolerance is ensured. The output current feedback Op  
Amp allows high frequency large signals (Slew Rate  
= 1800V/μs) and can also drive heavy load current  
(75mA). Differential inputs allow common mode  
rejection in low level amplification or in applications  
where signals are carried over relatively long wires.  
For single ended operation, the unused input can  
easily be tied to ground (or to a virtual half-supply in  
single supply application). Inverting or non-inverting  
gains could be obtained by choosing one input  
polarity or the other.  
Adjustment Range (Typical Over Temp) 70dB  
Gain Matching (Limit) ±0.7dB  
Slew Rate 1800V/µs  
Supply Current (No Load) 37mA  
Linear Output Current ±75mA  
Output Voltage (RL = 100) ±3.2V  
Input Voltage Noise 6.6nV/Hz  
Input Current Noise 2.4pA/Hz  
THD (20MHz, RL = 100, VO = 2VPP) 57dBc  
Replacement for CLC522  
APPLICATIONS  
Variable Attenuator  
AGC  
To further increase versatility when used in a single  
supply application, gain control range is set to be  
from 1V to +1V relative to pin 11 potential (ground  
pin). In single supply operation, this ground pin is tied  
to a "virtual" half supply. Gain control pin has high  
input impedance to simplify its drive requirement.  
Gain control is linear in V/V throughout the gain  
adjustment range. Maximum gain can be set to be  
anywhere between 1V/V to 100V/V or higher. For  
linear in dB gain control applications, see LMH6502  
datasheet.  
Voltage Controller Filter  
Multiplier  
The LMH6503 is available in the SOIC-14 and  
TSSOP-14 package.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
LMH is a trademark of Texas Instruments.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2003–2013, Texas Instruments Incorporated  
LMH6503  
SNOSA78E OCTOBER 2003REVISED APRIL 2013  
www.ti.com  
30  
20  
10  
0
11  
10  
9
dB  
85°C  
-40°C  
-40°C  
85°C  
8
25°C  
7
-10  
-20  
6
5
4
25°C  
-30  
-40  
-50  
3
V/V  
-60  
-70  
-80  
2
1
0
V
= ±0.1V  
0.8  
IN_DIFF  
0.4  
-0.8  
-0.4  
0
-1.2  
1.2  
V
(V)  
G
Figure 1. Gain vs. VG for Various Temperature  
Typical Application  
+5V  
R
F
1kW  
NC  
13  
+V  
-V  
IN  
1
3
4
14  
12  
R
50W  
1
V
OUT  
R
170W  
G
LMH6503  
10  
5
R
2
L
IN  
9
100W  
7
8
6
11  
R
2
50W  
-5V  
V
G
Figure 2. AVMAX = 10V/V  
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam  
during storage or handling to prevent electrostatic damage to the MOS gates.  
2
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Product Folder Links: LMH6503  
LMH6503  
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SNOSA78E OCTOBER 2003REVISED APRIL 2013  
Absolute Maximum Ratings(1)(2)  
ESD Tolerance:(3)  
Human Body  
2KV  
200V  
Machine Model  
Input Current  
±10mA  
VIN Differential  
±(V+ V)  
120mA(4)  
12.6V  
Output Current  
Supply Voltages (V+ - V)  
Voltage at Input/ Output pins  
Soldering Information:  
V+ +0.8V,V- 0.8V  
Infrared or Convection (20 sec)  
Wave Soldering (10 sec)  
235°C  
260°C  
Storage Temperature Range  
Junction Temperature  
65°C to +150°C  
+150°C  
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for  
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications, see the Electrical  
Characteristics tables.  
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and  
specifications.  
(3) Human body model: 1.5kin series with 100pF. Machine model: 0in series with 200pF.  
(4) The maximum output current (IOUT) is determined by device power dissipation limitations or value specified, whichever is lower.  
Operating Ratings(1)  
Supply Voltages (V+ - V)  
Temperature Range  
Thermal Resistance:  
14-Pin SOIC  
5V to 12V  
40°C to +85°C  
θJA  
θJC  
138°C/W  
160°C/W  
45°C/W  
51°C/W  
14-Pin TSSOP  
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for  
which the device is intended to be functional, but specific performance is not ensured. For ensured specifications, see the Electrical  
Characteristics tables.  
Copyright © 2003–2013, Texas Instruments Incorporated  
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SNOSA78E OCTOBER 2003REVISED APRIL 2013  
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Electrical Characteristics(1)  
Unless otherwise specified, all limits ensured for TJ = 25°C, VS = ±5V, AV(MAX) = 10, VCM = 0V, RF = 1k, RG = 174, VIN_DIFF  
= ±0.1V, RL = 100, VG = +1V. Boldface limits apply at the temperature extremes.  
Parameter  
Test Conditions  
Min(2)  
Typ(2)  
Max(2)  
Units  
Frequency Domain Response  
BW  
-3dB Bandwidth  
VOUT < 0.5PP  
VOUT < 0.5PP, AV(MAX) = 100  
VOUT < 0.5VPP  
135  
50  
MHz  
MHz  
GF  
Gain Flatness  
,
40  
1V < VG < 1V, ±0.2dB  
±0.2dB Flatness, f < 30MHZ  
±0.1dB, f < 30MHZ  
VG = 0V(4)  
Att Range Flat Band (Relative to Max Gain)  
Attenuation Range(3)  
20  
6.6  
100  
MHz  
MHz  
BW  
Gain Control Bandwidth  
Control  
PL  
Linear Phase Deviation  
Group Delay  
DC to 60MHz  
DC to 130MHz  
1.6  
2.6  
deg  
ns  
G Delay  
CT (dB)  
Feed-through  
VG = 1.2V, 30MHz (Output  
48  
dB  
Referred)  
GR  
Gain Adjustment Range  
f < 10MHz  
f < 30MHz  
79  
68  
dB  
Time Domain Response  
tr , tf  
Rise and Fall Time  
0.5V Step  
0.5V Step  
4V Step(5)  
2.2  
10  
ns  
%
OS%  
SR  
Overshoot  
Slew Rate  
1800  
4.6  
V/µs  
dB/ns  
ΔG Rate  
Gain Change Rate  
VIN = 0.3V, 10%90% of final  
output  
Distortion & Noise performance  
HD2  
HD3  
THD  
En tot  
In  
2nd Harmonic Distortion  
3rdHarmonic Distortion  
Total Harmonic Distortion  
Total Equivalent Input Noise  
Input Noise Current  
2VPP, 20MHz  
60  
61  
57  
6.6  
dBc  
dBc  
2VPP, 20MHz  
2VPP, 20MHz  
dBc  
1MHz to 150MHz  
1MHz to 150MHz  
nV/Hz  
pA/Hz  
%
2.4  
DG  
Differential Gain  
f = 4.43MHz, RL = 150, Neg.  
0.15  
Sync  
DP  
Differential Phase  
f = 4.43MHz, RL = 150, Neg.  
0.22  
deg  
Sync  
(1) Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very  
limited self-heating of the device such that TJ = TA. No ensured specification of parametric performance is indicated in the electrical  
tables under conditions of internal self-heating where TJ > TA.  
(2) Typical values represent the most likely parametric norm. Bold numbers refer to over temperature limits.  
(3) Flat Band Attenuation (Relative To Max Gain) Range Definition: Specified as the attenuation range from maximum which allows gain  
flatness specified (either ±0.2dB or ±0.1dB), relative to AVMAX gain. For example, for f<30MHz, here are the Flat Band Attenuation  
ranges:±0.2dB:  
10V/V down to 1V/V=20dB range±0.1dB:  
10V/V down to 4.7V/V=6.5dB range  
(4) Gain Control Frequency Response Schematic:  
R
F
910W  
+0.2V  
DC  
R
+V  
R
OUT  
50W  
IN  
+
R
1
G
PORT 2  
50W  
LMH6503  
820W  
R
50W  
L
-V  
IN  
-
2
G
V
R
2
50W  
+5V  
-5V  
C
1
R
F
IN  
0.01mF  
R
P1  
10kW  
0V  
DC  
R
T
PORT 1  
50W  
(5) Slew Rate is the average of the rising and falling rates.  
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4
Copyright © 2003–2013, Texas Instruments Incorporated  
Product Folder Links: LMH6503  
LMH6503  
www.ti.com  
SNOSA78E OCTOBER 2003REVISED APRIL 2013  
Electrical Characteristics(1) (continued)  
Unless otherwise specified, all limits ensured for TJ = 25°C, VS = ±5V, AV(MAX) = 10, VCM = 0V, RF = 1k, RG = 174, VIN_DIFF  
= ±0.1V, RL = 100, VG = +1V. Boldface limits apply at the temperature extremes.  
Parameter  
Test Conditions  
Min(2)  
Typ(2)  
Max(2)  
Units  
DC & Miscellaneous Performance  
GACCU  
G Match  
Gain Accuracy (see Application  
Information)  
VG =1.0V  
+0.25  
±0.3  
±0.4  
+0.9/0.4  
+1.3/1.5  
+4.4/4.3  
±0.7  
0V < VG < 1V  
0.7V < VG < 1V  
VG = 1.0  
dB  
Gain Matching (see Application  
Information)  
0 < VG < 1V  
+1.7/1.1  
+4.0/4.7  
dB  
0.7V < VG < 1V  
K
Gain Multiplier (see Application  
Information)  
1.58  
1.58  
1.72  
1.87  
1.91  
V/V  
V
VCM  
Input Voltage Range  
Differential Input Voltage  
RG Current  
Pin 3 & 6 Common Mode,  
|CMRR| > 50dB(6)  
±2.0  
±1.80  
±2.2  
±0.37  
±2.30  
11  
VIN_ DIFF  
IRG MAX  
IBIAS  
Across pins 3 & 6  
±0.34  
±0.28  
V
Pins 4 & 5  
±1.70  
±1.60  
mA  
Bias Current  
Pins 3 & 6(7)  
18  
20  
µA  
Pins 3 & 6(7)  
VS= ±2.5V  
,
3
10  
13  
TCBIAS  
I OFF  
Bias Current Drift  
Offset Current  
Pin 3 & 6(8)  
100  
nA/°C  
µA  
Pin 3 & 6  
0.01  
2.0  
2.5  
TC IOFF  
RIN  
Offset Current Drift  
Input Resistance  
Input Capacitance  
VG Bias Current  
See(8)  
5
750  
5
nA/°C  
kΩ  
Pin 3 & 6  
Pin 3 & 6  
Pin 2, VG = 1.4V(7)  
Pin 2(8)  
CIN  
pF  
IVG  
45  
µA  
TC IVG  
R VG  
C VG  
VOUT  
VG Bias Drift  
20  
nA/°C  
KΩ  
VG Input Resistance  
VG Input Capacitance  
Output Voltage Range  
Pin 2  
70  
Pin 2  
1.3  
±3.20  
pF  
RL = 100Ω  
±3.00  
±2.97  
V
RL Open  
±3.95  
±4.05  
±3.90  
ROUT  
IOUT  
Output Impedance  
Output Current  
DC  
0.1  
VOUT ±4V from Rails  
±75  
±90  
mA  
±70  
VO OFFSET Output Offset Voltage  
1V < VG < 1V  
±80  
80  
67  
67  
±350  
±380  
mV  
dB  
dB  
dB  
+PSRR  
PSRR  
CMRR  
+Power Supply Rejection Ratio  
(See(9)  
Input Referred, 1V change,  
VG = 1.4V  
58  
56  
)
Power Supply Rejection Ratio  
(See(9)  
Input Referred, 1V change,  
VG = 1.4V  
57  
51  
)
Common Mode Rejection Ratio  
(See(10)  
Input Referred, VG = 1V  
1.8V < VCM < 1.8V  
)
(6) CMRR definition: [|ΔVOUT/ΔVCM|/AV] with 0.1V differential input voltage. ΔVOUT is the change in output voltage with offset shift  
subtracted out.  
(7) Positive current correspondes to current flowing in the device.  
(8) Drift determined by dividing the change in parameter distribution at temperature extremes by the total temperature change.  
(9) +PSRR definition: [|ΔVOUT/ΔV+| /AV], -PSRR definition: [|ΔVOUT/ΔV| /AV] with 0.1V differential input voltage. ΔVOUT is the change in  
output voltage with offset shift subtracted out.  
(10) CMRR definition: [|ΔVOUT/ΔVCM|/AV] with 0.1V differential input voltage. ΔVOUT is the change in output voltage with offset shift  
subtracted out.  
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SNOSA78E OCTOBER 2003REVISED APRIL 2013  
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Electrical Characteristics(1) (continued)  
Unless otherwise specified, all limits ensured for TJ = 25°C, VS = ±5V, AV(MAX) = 10, VCM = 0V, RF = 1k, RG = 174, VIN_DIFF  
= ±0.1V, RL = 100, VG = +1V. Boldface limits apply at the temperature extremes.  
Parameter  
Supply Current  
Test Conditions  
RL = Open  
Min(2)  
Typ(2)  
Max(2)  
Units  
IS  
37  
50  
53  
mA  
RL = Open, VS = ±2.5V  
12  
20  
23  
Connection Diagram  
Top View  
+
14  
13  
12  
11  
10  
9
1
2
3
4
5
6
7
+
V
V
NC  
V
G
-
I
+V  
IN  
+R  
GND  
G
V
-R  
-V  
OUT  
G
V
REF  
IN  
8
-
-
V
V
Figure 3. 14-Pin SOIC AND TSSOP Packages  
See Package Numbers D0014A and PW0014A  
6
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LMH6503  
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SNOSA78E OCTOBER 2003REVISED APRIL 2013  
Typical Performance Charateristics  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
Small Signal Frequency Response (AV = 2)  
Large Signal Frequency Response (AV = 2)  
5
90  
5
GAIN  
R
F
= 920W, R = 820W  
G
3
45  
0
-5  
0
0
-3  
PHASE  
-10  
-15  
-20  
-25  
-30  
-35  
-45  
-90  
-135  
-180  
-225  
-5  
R
F
= 2.4kW, R = 2.1kW  
G
-8  
-10  
-13  
-15  
-18  
-20  
V
A
= 5V  
PP  
OUT  
= 2  
VMAX  
R
R
= 2.4kW  
V
A
= 0.5V  
= 2  
F
OUT  
PP  
= 2.15kW  
G
VMAX  
-270  
1M  
10M  
100M  
1G  
100k  
1M  
10M  
100M  
1G  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 4.  
Figure 5.  
Frequency Response over Temperature (AV = 10)  
Frequency Response for Various VG (AVMAX = 10)  
1
1
150  
100  
50  
40  
-1.0V  
GAIN  
GAIN  
20  
0
0
85°C  
1.2V  
-40°C  
25°C  
-1  
-1  
-0.4V  
0
PHASE  
-20  
-40  
-60  
-80  
-100  
-120  
-140  
-160  
-2  
-3  
-4  
-5  
-6  
-7  
-2  
-3  
-4  
-5  
-6  
-7  
0
PHASE  
1.2V  
-0.4V  
-1.0V  
-40°C  
25°C  
85°C  
-50  
-100  
-150  
-200  
-250  
-300  
-350  
A
= 10, V = V  
GMAX  
VMAX  
G
A
= 10  
VMAX  
GAIN/PHASE DATA  
GAIN NORMALIZED TO LOW  
FREQUENCY VALUE AT  
NORMALIZED TO LOW  
-8  
-9  
-8  
-9  
EACH V  
G
FREQUENCY VALUE AT 25°C  
1M  
100M  
1M  
100M  
1k  
100k  
10M  
1G  
1k  
100k  
10M  
1G  
10k  
10k  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 6.  
Figure 7.  
Frequency Response for Various VG (AVMAX = 10) (±2.5V)  
Small Signal Frequency Response  
3
2
270  
3
40  
V
= 0.5V  
RF(kW)  
-0.48V  
0.55V  
A
VMAX  
OUT  
GAIN  
PP  
225  
180  
135  
2
20  
PHASE  
GAIN  
1
0
100  
10  
2
750  
1k  
2.4k  
0
1
0
0V  
-20  
-40  
-60  
-80  
-100  
-120  
-160  
-7  
-1  
-2  
90  
-1  
-2  
-3  
-4  
-5  
-6  
-7  
100  
45  
0
-3  
-4  
-5  
-6  
-7  
-8  
-9  
0V  
10  
2
25°C  
-45  
-0.48V  
V
= ±2.5V  
PHASE  
S
-90  
A
= 10  
VMAX  
-135  
-180  
-225  
-270  
GAIN NORMALIZED TO  
LOW FREQUENCY  
VALUE AT EACH V  
G
SEE NOTE 12  
1k  
10k 100k 1M  
10M 100M 1G  
f (25 MHz/DIV)  
FREQUENCY (Hz)  
Figure 8.  
Figure 9.  
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Typical Performance Charateristics (continued)  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
Frequency Response for Various VG (AVMAX = 100)  
Large Signal Frequency Response  
(Small Signal)  
3
2
270  
1
0
60  
40  
20  
V
= 5V  
PP  
R (kW)  
OUT  
A
VMAX  
SEE NOTE 12  
F
225  
180  
135  
GAIN  
1
0
100  
10  
2
750  
1k  
2.4k  
A
P
= 100  
VMAX  
GAIN  
-1  
-2  
-3  
= -42dBm  
IN  
-1  
-2  
90  
0
PHASE  
45  
0
-20  
-40  
-60  
-80  
100  
2
-3  
-4  
-5  
-6  
-7  
-8  
-9  
-4  
-5  
-6  
-7  
-8  
10  
-45  
1.1V  
PHASE  
-90  
0.5V  
-135  
-180  
-225  
-270  
0V  
-100  
-120  
-0.5V  
50M  
SEE NOTE 12  
0
100M  
f (25 MHz/DIV)  
f (10 MHz/DIV)  
Figure 10.  
Figure 11.  
Frequency Response for Various VG (AVMAX = 100)  
(Large Signal)  
Gain Control Frequency Response  
1
60  
40  
20  
5
SEE NOTE 12  
GAIN  
0
A
P
= 100  
VMAX  
0
-1  
-2  
-3  
= -22dBm  
IN  
0
PHASE  
-5  
-20  
-40  
-60  
-80  
-4  
-5  
-6  
-7  
-8  
V
P
A
= 0V AVERAGE  
= 0dBm  
G
-10  
1.1V  
IN  
0.5V  
= 2V/V  
VMAX  
-15  
-20  
S21 (dB) + 20 PLOTTED  
0V  
-100  
-120  
SEE NOTE 11  
-0.5V  
0
50M  
f (10 MHz/DIV)  
100M  
100k  
1M  
10M  
100M  
1G  
FREQUENCY (Hz)  
Figure 12.  
IS vs. VS  
Figure 13.  
IS vs. VS  
60  
60  
50  
40  
30  
20  
85°C  
50  
40  
30  
20  
85°C  
25°C  
25°C  
-40°C  
-40°C  
R
= OPEN  
R
= OPEN  
L
L
10  
0
10  
0
V
G
= V  
V
G
= V  
G_MAX  
G_MIN  
6
6
2.5  
3
3.5  
4
4.5  
5
5.5  
2.5  
3
3.5  
4
4.5  
5
5.5  
±SUPPLY VOLTAGE (V)  
±SUPPLY VOLTAGE (V)  
Figure 14.  
Figure 15.  
8
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Typical Performance Charateristics (continued)  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
Input Bias Current vs. VS  
AVMAX vs. VS  
18  
16  
14  
12  
10  
-40°C  
85°C  
85°C  
12  
10  
8
6
4
25°C  
25°C  
-40°C  
8
6
4
2
0
-40°C  
2
0
V
V
= V  
G_MAX  
G
= 0.1V  
IN_DIFF  
2.5  
3
3.5  
4
4.5  
5
5.5  
6
2
2.5  
3
3.5  
4
4.5  
5
5.5  
6
±SUPPLY VOLTAGES (V)  
±Supply Voltage (V)  
Figure 16.  
Figure 17.  
PSRR ±5V  
PSRR ±2.5V  
0
-10  
-20  
0
-10  
-20  
SEE NOTE 10  
SEE NOTE 10  
-30  
-40  
-50  
-30  
-40  
-50  
+PSRR  
+PSRR  
-60  
-60  
-PSRR  
-70  
-80  
-70  
-80  
V
V
= ±2.5V  
= V  
-PSRR  
V
= ±5V  
= V  
S
S
V
G
GMAX  
G
GMAX  
-90  
-90  
1M  
1M  
10M  
100k  
10M  
1k  
10k 100k  
100M  
1k  
10k  
100M  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 18.  
Figure 19.  
CMRR ±5V  
CMRR ±2.5V  
0
0
SEE NOTE 9  
SEE NOTE 9  
-20  
-20  
-40  
-60  
-40  
-60  
MAXGAIN  
MAXGAIN  
-80  
-80  
V
S
= ±5V  
= 10  
V
A
P
= ±2.5V  
S
-100  
-100  
A
VMAX  
= 10  
VMAX  
P
IN  
= 0dBm  
= 0dBm  
MIDGAIN  
IN  
MIDGAIN  
100k  
-120  
-120  
1M  
10M  
100k  
1M  
1k  
10k  
100M  
1k  
10k  
10M  
100M  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 20.  
Figure 21.  
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Typical Performance Charateristics (continued)  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
AVMAX vs. VCM  
AVMAX vs. VCM  
12  
12  
10  
8
10  
8
85°C  
25°C  
85°C  
25°C  
-40°C  
6
6
4
-40°C  
4
2
2
0
V
V
V
= ±2.5V  
0
-2  
-4  
V
V
V
= ±5V  
S
S
= 0.1V  
= 0.1V  
1
IN_DIFF  
= V  
IN_DIFF  
= V  
G
GMAX  
G
GMAX  
-2  
-1 -0.8 -0.6 -0.4 -0.2  
V
0
0.2 0.4 0.6 0.8  
(V)  
1
-3  
-2  
-1  
0
2
3
V
CM  
(V)  
CM  
Figure 22.  
Figure 23.  
Supply Current vs. VCM  
Supply Current vs. VCM  
60  
28  
26  
24  
22  
85°C  
85°C  
85°C  
25°C  
50  
40  
30  
20  
25°C  
-40°C  
20  
18  
16  
14  
12  
10  
-40°C  
V
V
= ±5V  
10  
0
S
V
V
= ±2.5V  
S
= V  
G
GMAX  
= V  
G
GMAX  
-1.5  
-1  
-0.5  
0
0.5  
1
1.5  
-3  
-2  
-1  
0
1
2
3
V (V)  
CM  
V
(V)  
CM  
Figure 24.  
Figure 25.  
Output Offset Voltage vs.VCM (Typical Unit 1)  
Output Offset Voltage vs.VCM (Typical Unit 2)  
0
120  
85°C  
-5  
-40°C  
110  
25°C  
-10  
100  
-15  
25°C  
90  
-20  
-25  
-30  
80  
85°C  
70  
60  
-40°C  
-35  
V
V
= ±5V  
V
V
= ±5V  
S
S
50  
40  
-40  
-45  
= V  
= V  
G
GMAX  
G
GMAX  
-3  
-2  
-1  
0
1
2
3
-3  
-2  
-1  
2
3
0
1
V
CM  
(V)  
V
(V)  
CM  
Figure 26.  
Figure 27.  
10  
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Typical Performance Charateristics (continued)  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
Output Offset Voltage vs.VCM (Typical Unit 3)  
Feed through Isolation  
60  
40  
20  
-100  
-110  
-120  
-40°C  
85°C  
0
-20  
-40  
A
= 100  
VMAX  
A
= 10  
VMAX  
-130  
A
= 2  
VMAX  
-140  
-60  
-80  
25°C  
-150  
V
V
= ±5V  
S
-160  
-170  
-100  
-120  
= V  
GMAX  
G
100k  
1M  
10M  
100M  
-3  
-2  
-1  
1
2
3
0
FREQUENCY (Hz)  
V
(V)  
CM  
Figure 28.  
Figure 29.  
(1)  
Gain Flatness and Linear Phase Deviation  
Gain Flatness Frequency vs. Gain  
0.40  
2.4  
2
±0.2dB  
-1.0V  
100M  
GAIN  
0.30  
0.20  
-0.4V  
1.6  
1.2  
0.10  
10M  
1.2V  
0.00  
0.8  
0.4  
0
PHASE  
-0.10  
-0.20  
-0.30  
-0.40  
-0.50  
-0.60  
1.2V  
R
R
= 1kW  
F
1M  
-0.4  
-0.8  
-1.2  
-1.6  
-0.4V  
= 170W  
±0.1dB  
G
IN  
G
-1.0V  
P
V
= -10dBm  
VARIED  
GAIN DATA NORMALIZED TO LOW  
FREQUENCY VALUE AT EACH V  
f (3 MHz/DIV)  
G
100k  
4
5
6
7
0
1
2
3
8
9
10  
A
(V/V)  
V
Figure 30.  
Figure 31.  
K Factor vs. RG  
Group Delay vs. Frequency  
2.80  
2.70  
2.60  
2.50  
2.40  
2.30  
2.20  
2.10  
2.00  
2.1  
V
A
= V  
GMAX  
G
R
= 477W  
F
2
1.9  
1.8  
1.7  
= 10  
VMAX  
R
= 690W  
F
R
F
= 6.18kW  
1.6  
1.5  
1.4  
1.3  
1.2  
R
= 1.3kW  
F
2k  
1k  
10  
100  
f (5 MHz/DIV)  
R
(W)  
G
Figure 32.  
Figure 33.  
(1) Flat Band Attenuation (Relative To Max Gain) Range Definition: Specified as the attenuation range from maximum which allows gain  
flatness specified (either ±0.2dB or ±0.1dB), relative to AVMAX gain. For example, for f<30MHz, here are the Flat Band Attenuation  
ranges:±0.2dB:  
10V/V down to 1V/V=20dB range±0.1dB:  
10V/V down to 4.7V/V=6.5dB range  
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Typical Performance Charateristics (continued)  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
Gain vs. VG Including Limits  
BW vs. RF for Various RG  
1000  
12  
10  
8
R
= 100W  
G
V
= ±0.1V  
IN_DIFF  
R
= 180W  
G
R
= 466W  
LIMIT HIGH  
G
100  
10  
R
= 1190W  
G
TYPICAL  
R
= 47W  
G
6
LIMIT LOW  
4
2
0
R
G
= 27W  
1
-1.2  
-0.8  
-0.4  
0
0.4  
0.8  
1.2  
100  
1k  
10k  
100k  
V
G
(V)  
R
F
(W)  
Figure 34.  
Figure 35.  
Output Offset Voltage vs. VG  
(Typical Unit 1)  
Gain vs. VG (±5V)  
30  
11  
10  
9
120  
100  
80  
60  
40  
20  
0
dB  
-40°C  
20  
10  
0
85°C  
-40°C  
25°C  
-40°C  
85°C  
8
25°C  
7
-10  
-20  
85°C  
6
5
4
25°C  
-30  
-40  
-50  
3
V/V  
-60  
-70  
-80  
2
1
0
V
= ±0.1V  
0.8  
IN_DIFF  
0.4  
-1.2 -0.8  
-0.4  
0
1.2  
-1.5  
-1  
-0.5  
0
0.5  
1
1.5  
V
(V)  
G
V
G
(V)  
Figure 36.  
Figure 37.  
Output Offset Voltage vs. VG  
(Typical Unit 2)  
Output Offset Voltage vs. VG  
(Typical Unit 3)  
15  
10  
5
0
-20  
-40  
0
-60  
85°C  
-5  
-10  
-15  
-20  
-25  
-30  
-40°C  
25°C  
-80  
-100  
-120  
-140  
-160  
85°C  
25°C  
-40°C  
-1.5  
1
-0.5  
0
0.5  
1
1.5  
-1.5  
-1  
-05  
0
0.5  
1
1.5  
V
(V)  
G
V
(V)  
G
Figure 38.  
Figure 39.  
12  
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Typical Performance Charateristics (continued)  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
Output Offset Voltage vs. ±VS for Various VG  
Output Offset Voltage vs. ±VS for Various VG  
(Typical Unit 1)  
(Typical Unit 2)  
140  
25  
20  
MAX  
120  
15  
MIN  
100  
10  
5
MID  
80  
60  
0
MID  
-5  
MIN  
-10  
40  
MAX  
-15  
20  
0
-20  
-25  
6.5  
2.5  
3
3.5  
4
4.5  
±V (V)  
5
5.5  
6
2.5  
3
3.5  
4
4.5  
±V (V)  
5
5.5  
6
6.5  
S
S
Figure 40.  
Figure 41.  
Output Offset Voltage vs. ±VS for Various VG  
(Typical Unit 3)  
Gain vs. VG (±2.5V)  
10  
9
0
V
= ±2.5V  
= 980W  
= 180W  
S
-20  
MIN  
-40  
R
F
8
R
G
7
-60  
6
5
4
3
2
1
0
-80  
-100  
-120  
-140  
-160  
-180  
-200  
MID  
MAX  
0.0  
(V)  
-0.6 -0.4  
-0.2  
0.2  
0.4  
0.6  
2.5  
3
3.5  
4
4.5  
±V (V)  
5
5.5  
6
6.5  
V
G
S
Figure 42.  
Noise vs. Frequency (AVMAX = 2)  
Figure 43.  
Noise vs. Frequency (AVMAX = 10)  
10000  
1000  
100  
10000  
1000  
100  
A
= 2  
= 910W  
= 820W  
A
= 10  
VMAX  
VMAX  
R
R
R
R
= 1kW  
F
F
= 180W  
MAX GAIN  
G
G
MAX GAIN  
MID GAIN  
MID GAIN  
MIN GAIN  
MIN GAIN  
10  
10  
100  
1k  
10k  
100k  
1M  
100  
1k  
10k  
100k  
1M  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 44.  
Figure 45.  
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Typical Performance Charateristics (continued)  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
Noise vs. Frequency (AVMAX = 100)  
1dB Compression  
24  
23  
22  
100k  
10k  
1k  
OUTPUT LIMITED , R = 1.5kW  
F
MAX GAIN  
MID GAIN  
NO GAIN  
21  
20  
INPUT LIMITED, R = 620W  
F
19  
18  
A
= 100  
VMAX  
100  
10  
R
F
R
G
R
L
= 2kW  
17  
16  
15  
= 24W  
V
= V  
GMAX  
G
= 100W  
R
= 180W  
G
10k  
0
20 40 60 80 100 120 140 160  
10  
1k  
100k  
1M  
10M  
100  
FREQUENCY (Hz)  
FREQUENCY (MHz)  
Figure 46.  
Figure 47.  
Output Voltage vs. Output Current  
HD2 vs. POUT  
90  
85  
80  
75  
70  
65  
60  
55  
50  
4.5  
4
A
V
= 10  
1MHz  
VMAX  
= V  
V
= ±0.5V  
IN_DIFF  
G
GMAX  
SINK  
3.5  
3
2.5  
SOURCE  
2
1.5  
1
10MHz  
0.5  
0
20MHz  
-10  
-5  
0
10  
(dBm)  
15  
20  
5
0
20  
40  
60  
100  
80  
P
OUT  
I
(mA)  
OUT  
Figure 48.  
Figure 49.  
HD3 vs. POUT  
THD vs. POUT  
90  
85  
100  
90  
80  
70  
60  
50  
40  
30  
20  
1MHz  
1MHz  
80  
75  
70  
65  
60  
55  
50  
45  
40  
10MHz  
10MHz  
20MHz  
20MHz  
A
V
= 10  
VMAX  
A
V
= 10  
VMAX  
= V  
G
GMAX  
= V  
G
GMAX  
-10  
-5  
0
10  
(dBm)  
15  
20  
5
-10  
-5  
0
5
10  
15  
20  
P
P
OUT  
(dBm)  
OUT  
Figure 50.  
Figure 51.  
14  
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Typical Performance Charateristics (continued)  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
HD2 & HD3 vs. VG  
THD vs. VG  
80  
70  
60  
50  
40  
30  
20  
90  
80  
70  
60  
50  
HD3, 0.25V  
PP  
0.25V  
PP  
1V  
HD2, 0.25V  
PP  
PP  
HD2, 1V  
PP  
2V  
PP  
HD2, 2V  
PP  
HD3, 2V  
40  
30  
20  
PP  
10  
0
HD3, 1V  
PP  
f = 20MHz  
20MHZ  
0.6  
-1  
-0.6  
-0.2  
0.2  
(V)  
0.6  
1
-1  
-0.6  
-0.2  
0.2  
1
V
V
(V)  
G
G
Figure 52.  
VG Bias Current vs. VG  
Figure 53.  
Step Response Plot  
50  
45  
0.5V SMALL SIGNAL  
PP  
40  
35  
SS REF  
30  
25  
20  
LS REF  
15  
10  
5
5V LARGE SIGNAL  
PP  
0
-1.4 -1.0 -0.6 -0.2 0.2 0.6 1.0 1.4  
4 ns/DIV  
V
(V)  
G
Figure 54.  
Figure 55.  
Step Response Plot  
Gain vs. VG Step  
1.5  
1.2  
0.9  
0.6  
0.3  
0
10  
9
8
7
6
5
4
3
2
1
0
0.5V SMALL SIGNAL  
PP  
V
A
= 0.3V  
IN  
= 10  
VMAX  
R = 100W  
L
SS REF  
LS REF  
V
G
-0.3  
-0.6  
-0.9  
-1.2  
-1.5  
GAIN  
2.5V LARGE SIGNAL  
V
= V  
G_MID  
PP  
G
4 ns/DIV  
t (10ns/DIV)  
Figure 56.  
Figure 57.  
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Typical Performance Charateristics (continued)  
Unless otherwise specified: VS = ±5V, 25°C, VG = VG_MAX, VCM = 0V, RF = 1k, RG = 174, both inputs terminated in 50, RL  
= 100, Typical values, results referred to device output:  
VG Feedthrough  
A
= 10  
VMAX  
R = 100W  
L
0
V
OUT  
V
G
0
t (10ns/DIV)  
Figure 58.  
16  
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APPLICATION INFORMATION  
THEORY OF OPERATION  
The LMH6503 is a linear wideband variable-gain amplifier as illustrated in Figure 59. A voltage input signal may  
be applied differentially between the two inputs (+VIN, VIN), or single-endedly by grounding one of the two  
unused inputs. The LMH6503 input buffers convert the input voltage to a current (IRG) that is a function of the  
differential input voltage (VINPUT = (+VIN) - (VIN)) and the value of the gain setting resistor (RG). This current (IRG  
)
is then mirrored to a gain stage with a current gain of K (1.72 nominal). The voltage controlled two-quadrant  
multiplier attenuates this current which is then converted to a voltage via the output amplifier. This output  
amplifier is a current feedback op amp configured as a Transimpedance amplifier. Its Transimpedance gain is the  
feedback resistor (RF). The input signal, output, and gain control are all voltages. The output voltage can easily  
be calculated as shown in Equation 1:  
V
+ 1  
G
FOR -1 < V < +1  
V
= I  
RG  
x K x  
x R  
F
G
OUT  
2
(1)  
Where K = 1.72 (Nominal)  
since:  
V
INPUT  
I
=
RG  
R
G
(2)  
The gain of the LMH6503 is therefore a function of three external variables: RG, RF, and VG as expressed in  
Equation 3:  
R
V + 1  
G
F
A
=
x 1.72 x  
V
R
2
G
(3)  
The gain control voltage (VG) has an ideal input range of 1V < VG < +1V. At VG = +1V, the gain of the LMH6503  
is at its maximum as expressed in Equation 4:  
R
F
A
= 1.72  
V
R
G
(4)  
Notice also that Equation 4 holds for both differential and single-ended operation.  
V
G
+V  
IN  
X1  
-
I
I
RG  
V
INPUT  
R
F
R
G
I
K
X
-
RG  
CFB  
V
OUT  
OP AMP  
V
G
+ 1  
+
V
REF  
2
X1  
-V  
IN  
Figure 59. LMH6503 Functional Block Diagram  
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CHOOSING RF AND RG  
RG is calculated using Equation 5. VINPUTMAX is the maximum peak input voltage (Vpk) determined by the  
application. IRGMAX is the maximum allowable current through RG and is typically 2.3mA. Once AVMAX is  
determined from the minimum input and desired output voltages, RF is then determined using Equation 6. These  
values of RF and RG are the minimum possible values that meet the input voltage and maximum gain constraints.  
Scaling the resistor values will decrease bandwidth and improve stability.  
VINPUT  
MAX  
RG =  
I
RGMAX  
(5)  
1
RF =  
RG AVMAX  
*
*
K
(6)  
Figure 60 illustrates the resulting LMH6503 bandwidths as a function of the maximum ( y axis) and minimum  
(related to x axis) input voltages when VOUT is held constant at 1VPP  
.
10  
5MHz  
2.7MHz  
10MHz  
1
150MHz  
100MHz  
0.1  
V
V
= 1V  
PP  
OUT  
50MHz  
= V  
G
GMAX  
20MHz  
I
= 2.3mA  
RGMAX  
0.01  
1
10  
100  
A
(V/V)  
VMAX  
Figure 60. Bandwidth vs. VINMAX and AVMAX  
ADJUSTING OFFSETS  
Treating the offsets introduced by the input and output stages of the LMH6503 is accomplished with a two step  
process. The offset voltage of the output stage is treated by first applying 1.1V on VG, which effectively isolates  
the input stage and multiplier core from the output stage. As illustrated in Figure 61, the trim pot located at R14  
on the LMH6503 Evaluation Board (LMH730033) should then be adjusted in order to null the offset voltage seen  
at the LMH6503's output (pin 10).  
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Figure 61. Nulling the Output Offset Voltage  
Once this is accomplished, the offset errors introduced by the input stage and multiplier core can then be treated.  
The second step requires the absence of an input signal and matched source impedances on the two input pins  
in order to cancel the bias current errors. This done, then +1.1V should be applied to VG and the trim pot located  
at R10 adjusted in order to null the offset voltage seen at the LMH6503's output. If a more limited gain range is  
anticipated, the above adjustments should be made at these operating points. These steps will minimize the  
output offset voltage. However, since the offset term itself varies with the gain setting, the correction is not  
perfect and some residual output offset will remain.  
GAIN ACCURACY  
Defined as the ratio of measured gain (V/V), at a certain VG, to the best fit line drawn through the typical gain  
(V/V) distribution for 1V < VG < 1V (results expressed in dB) (See Figure 62). The best fit gain (AV) is given by:  
AV (V/V) = 4.87VG + 4.61  
(7)  
(8)  
For: 1V VG + 1V, RF = 1k, RG = 174Ω  
For a VG range, the value specified in the tables represents the worst case accuracy over the entire range. The  
"Typical" value would be the worst case ratio between the "Typical Gain" and the best fit line. The "Max" value  
would be the worst case between the max/min gain limit and the best fit line.  
GAIN MATCHING  
Defined as the limit on gain variation at a certain VG (expressed in dB) (See Figure 62). Specified as "Max" only  
(no "Typical"). For a VG range, the value specified represents the worst case matching over the entire range. The  
"Max" value would be the worst case ratio between the max/min gain limit and the typical gain.  
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MAX GAIN LIMIT  
MIN GAIN LIMIT  
D
C
TYPICAL GAIN  
B
A
BEST FIT LINE  
V
(V)  
G
PARAMETER:  
GAIN ACCURACY (TYPICAL) = B/C (dB)  
GAIN ACCURACY (+ & - LIMIT) = D/C & A/C (dB)  
GAIN MATCHING (+ & - LIMIT) = D/B & A/B (dB)  
Figure 62. Gain Accuracy and Gain Matching Parameters Defined  
NOISE  
Figure 63 describes the LMH6503's output-referred spot noise density as a function of frequency with AVMAX  
=
10V/V. The plot includes all the noise contributing terms. However, with both inputs terminated in 50, the input  
noise contribution is minimal. At AVMAX = 10V/V, the LMH6503 has a typical flat-band input-referred spot noise  
density (ein) of 6.6nV/Hz. For applications with 3dB BW extending well into the flat-band region, the input RMS  
voltage noise can be determined from the following single-pole model:  
VRMS = ein * 1.57 * (-3dB BANDWIDTH)  
(9)  
10000  
A
VMAX  
= 10  
R
F
= 1kW  
R
G
= 180W  
MAX GAIN  
1000  
100  
10  
MID GAIN  
MIN GAIN  
100  
1k  
10k  
100k  
1M  
FREQUENCY (Hz)  
Figure 63. Output Referred Voltage Noise vs. Frequency  
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CIRCUIT LAYOUT CONSIDERATIONS  
Good high-frequency operation requires all of the de-coupling capacitors shown in Figure 64 to be placed as  
close as possible to the power supply pins in order to insure a proper high-frequency low-impedance bypass.  
Adequate ground plane and low inductive power returns are also required of the layout. Minimizing the parasitic  
capacitances at pins 3, 4, 5, 6, 9, 10 and 12 will assure best high frequency performance. The parasitic  
inductance of component leads or traces to pins 4, 5 and 9 should also be kept to a minimum. Parasitic or load  
capacitance, CL, on the output (pin 10) degrades phase margin and can lead to frequency response peaking or  
circuit oscillation. The LMH6503 is fully stable when driving a 100load. With reduced load (e.g. 1k) there is a  
possibility of instability at very high frequencies beyond 400MHz especially with a capacitive load. When the  
LMH6503 is connected to a light load as such, it is recommended to add a snubber network to the output (e.g.  
100and 39pF in series tied between the LMH6503 output and ground). CL can also be isolated from the output  
by placing a small resistor in series with the output (pin 10).  
Figure 64. Required Power Supply Decoupling  
Component parasitics also influence high frequency results. Therefore it is recommended to use metal film  
resistors such as RN55D or leadless components such as surface mount devices. High profile sockets are not  
recommended.  
Texas Instruments suggests the following evaluation board as a guide for high frequency layout and as an aid in  
device testing and characterization:  
Device  
Package  
Evaluation Board Part Number  
LMH6503MA  
SOIC-14  
LMH730033  
SINGLE SUPPLY OPERATION  
It is possible to operate the LMH6503 with a single supply. To do so, tie pin 11 (GND) to a potential about mid  
point between V+ and V. Two examples are shown in Figure 65 & Figure 66.  
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R
2
C
1
510W  
0.1µF  
R
510W  
1
V
3
S
V /2  
S
R
F
14  
1kW  
+V  
-V  
IN  
13  
1
C
OUT  
0.1µF  
+
12  
R
180W  
G
LMH6503  
9
10  
R
OUT  
50W  
IN  
2
V
OUT  
-
11  
8
6
7
R
R
4
3
2kW  
2kW  
V
G
RANGE: ±1V FROM PIN 11  
VOLTAGE (FOR V = 10V)  
S
Figure 65. AC Coupled Single Supply VGA  
C
R
2
1
0.1µF  
510W  
R
510W  
1
V
3
S
V /2  
S
R
1kW  
F
14  
13  
1
C
OUT  
0.1µF  
+
12  
R
160W  
G
LMH6503  
10  
R
OUT  
50W  
V
OUT  
2
9
-
11  
8
6
7
V
G
Figure 66. Transformer Coupled Single Supply VGA  
OPERATING AT LOWER SUPPLY VOLTAGES  
The LMH6503 is rated for operation down to 5V supplies (V+ - V). There are some specifications shown for  
operation at ±2.5V within the data sheet (i.e. Frequency Response, CMRR, PSRR, Gain vs. VG, etc.). Compared  
to ±5V operation, at lower supplies:  
a)  
VG range constricts. Referring to Figure 67, note that VG_MAX (VG voltage required to get maximum gain) is  
0.5V (VS = ±2.5V) compared to 1.0V for VS = ±5V. At the same time, gain cut-off (VG_MIN) would shift to  
0.5V from - 1V with VS = ±5V.  
Table 1 shows the approximate expressions for various VG voltages as a function of V-:  
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Table 1. VG Definition Based on V−  
VG  
Definition  
Gain Cut-off  
AVMAX/2  
Expression (V)  
0.2 x V−  
0
VG_MIN  
VG_MID  
VG_MAX  
AVMAX  
0.2 x V−  
b)  
c)  
VG_LIMIT (maximum permissible voltage on VG) is reduced. This is due to limitations within the device  
arising from transistor headroom. Beyond this limit, device performance will be affected (non-destructive).  
Referring to Figure 67, note that with V+ = 2.5V, and V= 4V, VG_LIMIT is approaching VG_MAX and already  
"Max gain" is reduced by 1dB. This means that operating under these conditions has reduced the  
maximum permissible voltage on VG to a level below what is needed to get Max gain. If supply voltages  
are asymmetrical, reference Figure 67 and Figure 68 plots to make sure the region of operation is not  
overly restricted by the "pinching" of VG_LIMIT, and VG_MAX curves.  
"Max_gain" reduces. There is an intrinsic reduction in max gain when the total supply voltage is reduced  
(see Figure 43). In addition, there is the more drastic mechanism described in "b" above and shown in  
Figure 67.  
Similar plots for V+ = 5V operation are shown in Figure 68 for comparison and reference.  
1.6  
1.4  
20.5  
20  
MAX GAIN  
1.2  
1
19.5  
19  
V
LIMIT  
G
0.8  
0.6  
0.4  
18.5  
18  
V
G
MAX  
+
17.5  
V
R
R
= 2.5V  
= 1kW  
F
17  
0.2  
0
= 170W  
G
16.5  
-4.5  
-4  
-3.5  
-3  
-2.5  
-2  
-
V (V)  
Figure 67. VG_MAX, VG_LIMIT, & Max-gain vs. V-  
(V+ = 2.5V)  
5
4.5  
4
20.5  
20.4  
20.3  
20.2  
20.1  
V
LIMIT  
G
3.5  
3
MAX GAIN  
2.5  
2
20  
+
V
= 5V  
19.9  
19.8  
19.7  
R
R
= 1kW  
F
1.5  
1
= 170W  
G
0.5  
0
19.6  
19.5  
V
MAX  
G
-6  
-5.5  
-5  
-4.5  
-4  
-3.5  
-3  
-
V (V)  
Figure 68. VG_MAX, VG_LIMIT, & Max-gain vs. V-  
(V+ = 5V)  
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Application Circuits  
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FOUR-QUADRANT MULTIPLIER  
Applications requiring multiplication, squaring or other non-linear functions can be implemented with four-  
quadrant multipliers. The LMH6503 implements a four-quadrant multiplier as illustrated in Figure 69:  
Figure 69. Four Quadrant Multiplier  
FREQUENCY SHAPING  
Frequency shaping and bandwidth extension of the LMH6503 can be accomplished using parallel networks  
connected across the RG ports. The network shown in the Figure 70 schematic will effectively extend the  
LMH6503's bandwidth.  
Figure 70. Frequency Shaping  
2nd ORDER TUNABLE BANDPASS FILTER  
The LMH6503 Variable-Gain Amplifier placed into a feedback loop provides signal processing function such as in  
a 2nd order tunable bandpass filter. The center frequency of the 2nd order bandpass shown in Figure 71 is  
adjusted through the use of the LMH6503's gain control voltage, VG. The integrators implemented with two  
sections of a LMH6682, provide the coefficients for the transfer function.  
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1
s
VO  
CRB  
1
n
-
=
p
VIN  
1
s2 + s  
+
CRB C2RY2  
pRB  
p
RF  
RY  
, wO  
, Q =  
=
p = 1.72  
RY  
CRY  
Figure 71. Tunable Bandpass Filter  
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REVISION HISTORY  
Changes from Revision D (April 2013) to Revision E  
Page  
Changed layout of National Data Sheet to TI format .......................................................................................................... 25  
26  
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PACKAGE OPTION ADDENDUM  
www.ti.com  
30-Sep-2021  
PACKAGING INFORMATION  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead finish/  
Ball material  
MSL Peak Temp  
Op Temp (°C)  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4/5)  
(6)  
LMH6503MA/NOPB  
LMH6503MAX/NOPB  
LMH6503MT  
ACTIVE  
ACTIVE  
NRND  
SOIC  
SOIC  
D
D
14  
14  
14  
55  
RoHS & Green  
SN  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
-40 to 85  
-40 to 85  
-40 to 85  
LMH6503MA  
2500 RoHS & Green  
SN  
LMH6503MA  
TSSOP  
PW  
94  
94  
Non-RoHS  
& Green  
Call TI  
LMH65  
03MT  
LMH6503MT/NOPB  
LMH6503MTX/NOPB  
ACTIVE  
ACTIVE  
TSSOP  
TSSOP  
PW  
PW  
14  
14  
RoHS & Green  
SN  
SN  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
-40 to 85  
-40 to 85  
LMH65  
03MT  
2500 RoHS & Green  
LMH65  
03MT  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance  
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may  
reference these types of products as "Pb-Free".  
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.  
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based  
flame retardants must also meet the <=1000ppm threshold requirement.  
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.  
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation  
of the previous line and the two combined represent the entire Device Marking for that device.  
(6)  
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two  
lines if the finish value exceeds the maximum column width.  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
30-Sep-2021  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information  
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and  
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.  
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.  
Addendum-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
9-Apr-2022  
TAPE AND REEL INFORMATION  
*All dimensions are nominal  
Device  
Package Package Pins  
Type Drawing  
SPQ  
Reel  
Reel  
A0  
B0  
K0  
P1  
W
Pin1  
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant  
(mm) W1 (mm)  
LMH6503MAX/NOPB  
LMH6503MTX/NOPB  
SOIC  
D
14  
14  
2500  
2500  
330.0  
330.0  
16.4  
12.4  
6.5  
9.35  
5.6  
2.3  
1.6  
8.0  
8.0  
16.0  
12.0  
Q1  
Q1  
TSSOP  
PW  
6.95  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
9-Apr-2022  
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
LMH6503MAX/NOPB  
LMH6503MTX/NOPB  
SOIC  
D
14  
14  
2500  
2500  
356.0  
367.0  
356.0  
367.0  
35.0  
35.0  
TSSOP  
PW  
Pack Materials-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
9-Apr-2022  
TUBE  
*All dimensions are nominal  
Device  
Package Name Package Type  
Pins  
SPQ  
L (mm)  
W (mm)  
T (µm)  
B (mm)  
LMH6503MA/NOPB  
LMH6503MT  
D
SOIC  
14  
14  
14  
14  
55  
94  
94  
94  
495  
495  
495  
495  
8
8
8
8
4064  
3.05  
4.06  
4.06  
4.06  
PW  
PW  
PW  
TSSOP  
TSSOP  
TSSOP  
2514.6  
2514.6  
2514.6  
LMH6503MT  
LMH6503MT/NOPB  
Pack Materials-Page 3  
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PARTY INTELLECTUAL PROPERTY RIGHTS.  
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate  
TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable  
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These resources are subject to change without notice. TI grants you permission to use these resources only for development of an  
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