MAX4430EUK+ [MAXIM]

Operational Amplifier, 1 Func, 5000uV Offset-Max, PDSO5, SOT-23, 5 PIN;
MAX4430EUK+
型号: MAX4430EUK+
厂家: MAXIM INTEGRATED PRODUCTS    MAXIM INTEGRATED PRODUCTS
描述:

Operational Amplifier, 1 Func, 5000uV Offset-Max, PDSO5, SOT-23, 5 PIN

运算放大器
文件: 总12页 (文件大小:749K)
中文:  中文翻译
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19-1749; Rev 0; 7/00  
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
General Description  
____________________________Features  
The MAX4430/MAX4431 single and MAX4432/MAX4433  
dual operational amplifiers feature wide bandwidth, 16-  
bit settling times in 37ns, and low-noise/low-distortion  
operation. The MAX4430/MAX4432 are compensated for  
unity gain stability and have a small signal -3dB band-  
width of 180MHz. The MAX4431/MAX4433 are compen-  
sated for closed-loop gains of +2 or greater and have a  
small-signal -3dB bandwidth of 215MHz.  
16-Bit Accurate Settling in 37ns  
(MAX4430/MAX4432)  
100dB SFDR at 1MHz, 4Vp-p Output  
2.8nV/Hz Input Voltage Noise Density  
110dB (min) Open-Loop Gain  
145V/µs Slew Rate (MAX4431/MAX4433)  
60mA High Output Drive  
The MAX4430–MAX4433 op amps require only 11mA of  
supply current per amplifier while achieving 125dB open-  
loop gain. Voltage noise density is a low 2.8nV/Hz,  
and provides 100dB spurious-free dynamic range  
(SFDR) at 1MHz. These characteristics make these op  
amps ideal for driving modern high-speed 14- and 16-  
bit analog-to-digital converters (ADCs).  
Wide Voltage Swing Capable of Driving ADC  
Inputs with 4Vp-p Input Dynamic Range  
Available in Space-Saving Packages  
5-pin SOT23 (MAX4430/MAX4431)  
8-pin µMAX (MAX4432/MAX4433)  
These high-speed op amps feature wide output voltage  
swings capable of driving ADCs with 4V input dynamic  
range and a high current output drive up to 60mA. Using  
a voltage feedback architecture, the MAX4430–  
MAX4433 meet the requirements of many applications  
that previously depended on current feedback ampli-  
fiers.  
Ordering Information  
PART  
TEMP. RANGE  
-40oC to +85oC  
-40oC to +85oC  
PIN-PACKAGE  
5 SOT23-5  
8 SO  
MAX4430EUK-T  
MAX4430ESA  
Ordering Information continued at end of data sheet.  
The MAX4430/MAX4431 are available in a space-sav-  
ing 5-pin SOT23 package, and the MAX4432/MAX4433  
are available in an 8-pin µMAX package.  
Selector Guide  
SETTLING  
TIME TO  
0.0015%  
(ns)  
MIN GAIN  
AMPS STABLE  
(V/V)  
BW  
(MHz)  
PART  
________________________Applications  
High-Speed 14- and 16-Bit ADC Preamplifiers  
MAX4430  
MAX4431  
MAX4432  
MAX4433  
1
1
2
2
+1  
+2  
+1  
+2  
180  
215  
180  
215  
37  
63  
37  
63  
Low-Noise Preamplifiers  
IF/RF Amplifiers  
Low-Distortion Active Filters  
High-Performance Receivers  
Precision Instrumentation  
Typical Operating Circuit  
V
CC  
Pin Configurations  
C
1
TOP VIEW  
MAX4430  
MAX4431  
HIGH-SPEED  
14-/16-BIT ADC  
OUT  
1
2
3
5
V
CC  
1
2
3
5
4
V
EE  
IN+  
4
IN-  
IN  
MAX4430  
MAX4431  
SOT23-5  
Pin Configurations continued at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
C
2
V
EE  
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
ABSOLUTE MAXIMUM RATINGS  
Supply Voltage (V  
to V )................................................+12V  
Operating Teꢀperature Range ...........................-40°C to +85°C  
Junction Teꢀperature......................................................+150°C  
Storage Teꢀperature Range.............................-65°C to +150°C  
Lead Teꢀperature (soldering, 10s) .................................+300°C  
CC  
EE  
Differential Input Voltage .......................................................+2V  
Input Voltage Range ........................(V + 0.3V) to (V - 0.3V)  
CC  
EE  
Output Short-Circuit Duration to V  
or V ...................(Note 1)  
CC  
EE  
Current Into Any Input Pin ................................................ 25ꢀA  
Continuous Power Dissipation (T = +70°C)  
A
5-Pin SOT23 (derate 7.1ꢀW/°C above +70°C)............571ꢀW  
8-Pin µMAX (derate 4.5ꢀW/°C above +70°C).............330ꢀW  
8-Pin SO (derate 5.88ꢀW/°C above +70°C)................471ꢀW  
Note 1: The MAX4430MAX4433 are not protected for output short-circuit conditions.  
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional  
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to  
absolute maximum rating conditions for extended periods may affect device reliability.  
DC ELECTRICAL CHARACTERISTICS  
(V  
= +5V, V = -5V, R = , V  
= 0, and T = T  
A
to T  
, unless otherwise noted. Typical values are at T = +25°C.) (Note 2)  
MAX A  
CC  
EE  
L
CM  
MIN  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
-
UNITS  
V
Input Coꢀꢀon-Mode Voltage  
Range  
V
+
V
EE  
CC  
V
Guaranteed by CMRR test  
CM  
2.5  
0.9  
Input Offset Voltage  
V
1.25  
7
5
ꢀV  
OS  
Input Offset Voltage  
Teꢀperature Coefficient  
TC  
µV/°C  
VOS  
Input Offset Voltage Matching  
Input Bias Current  
MAX4432/MAX4433  
0.25  
11  
ꢀV  
µA  
µA  
I
30  
5
B
Input Offset Current  
I
0.35  
12k  
1M  
OS  
Differential (-10ꢀV V +10ꢀV)  
IN  
Input Resistance  
R
IN  
Coꢀꢀon ꢀode (V + 2.5V V V - 0.9V)  
EE  
CM  
CC  
Coꢀꢀon-Mode Rejection Ratio  
CMRR  
V
+ 2.5V V  
V  
- 0.9V  
100  
115  
120  
dB  
EE  
CM  
CC  
V
+ 2.5 V  
V  
- 0.9V;  
- 0.9V;  
EE  
OUT  
CC  
125  
125  
R = 10kto ground  
L
Open-Loop Gain  
A
dB  
V
VOL  
V
+ 2.5 V  
V  
OUT CC  
EE  
110  
R = 500to ground  
L
V
+
V
0.25  
-
CC  
EE  
R = 10kto ground  
L
2.5  
Output Voltage Swing  
V
OUT  
V
+
V
0.6  
-
CC  
EE  
R = 500to ground  
L
2.6  
Output Current  
I
R = 20to ground  
30  
60  
ꢀA  
ꢀA  
OUT  
L
Output Short-Circuit Current  
I
Sinking or sourcing  
100  
SC  
PSRR-  
V
V
= -5.5V to -4.5V  
EE  
Power-Supply Rejection Ratio  
75  
95  
11  
dB  
V
PSRR+  
= +4.5V to +5.5V  
CC  
Operating Supply Voltage Range  
V
Guaranteed by PSRR test  
4.5  
5.5  
S
Quiescent Supply Current  
(per aꢀplifier)  
I
S
13.5  
ꢀA  
2
_______________________________________________________________________________________  
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
AC ELECTRICAL CHARACTERISTICS  
(V  
= +5V, V = -5V, R = 500, V  
= 0, A  
= +1, T = +25°C, unless otherwise noted.)  
CC  
EE  
L
CM  
VCL  
A
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
V
= 100ꢀVp-p,  
OUT  
180  
MAX4430/MAX4432  
Sꢀall-Signal -3dB Bandwidth  
Large-Signal -3dB Bandwidth  
Bandwidth for 0.1dB Flatness  
BW  
BW  
MHz  
SS  
V
= 100ꢀVp-p,  
OUT  
215  
45  
MAX4431/MAX4433 (A  
= +2)  
VCL  
V
= 1Vp-p,  
OUT  
MAX4430/MAX4432  
V
= 2Vp-p,  
OUT  
32  
MAX4430/MAX4432  
MHz  
MHz  
LS  
V
= 2Vp-p,  
OUT  
40  
MAX4431/MAX4433 (A  
= +2)  
= +2)  
VCL  
V
= 4Vp-p,  
OUT  
20  
MAX4431/MAX4433 (A  
VCL  
V
= 100ꢀVp-p,  
OUT  
12  
MAX4430/MAX4432  
BW  
0.1dB  
V
= 100ꢀVp-p,  
OUT  
80  
MAX4431/MAX4433 (A  
= +2)  
VCL  
V
= 2V step,  
OUT  
100  
145  
MAX4430/MAX4432  
Slew Rate  
SR  
V/µs  
V
= 2V step,  
OUT  
MAX4431/MAX4433 (A  
= +2)  
VCL  
V
V
V
= 2V step  
20  
40  
OUT  
OUT  
Rise/Fall Tiꢀe  
t
t
ns  
R, F  
= 4V step  
= 0 to 2V step,  
OUT  
37  
63  
MAX4430/MAX4432  
V
= 0 to 2V step,  
OUT  
MAX4431/MAX4433 (A  
= +2)  
= +2)  
VCL  
Settling Tiꢀe to 16 Bit  
(0.0015%)  
t
ns  
S
V
= 0 to 4V step,  
OUT  
56  
MAX4430/MAX4432  
V
= 0 to 4V step,  
OUT  
140  
MAX4431/MAX4433 (A  
VCL  
_______________________________________________________________________________________  
3
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
AC ELECTRICAL CHARACTERISTICS (continued)  
(V  
= +5V, V = -5V, R = 500, V  
= 0, A  
= +1, T = +25°C, unless otherwise noted.)  
CC  
EE  
L
CM  
VCL  
A
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
24  
MAX  
UNITS  
ns  
Output GlitchSettling to  
16-Bit (0.0015%)  
5pF load; C charged froꢀ 0 to 4V  
L
Output Overload Recovery Tiꢀe  
50% overdrive, settling to 10% accuracy  
95  
ns  
AC Coꢀꢀon-Mode Rejection  
Ratio  
f = 100kHz  
f = 100kHz  
-84  
-77  
-110  
dB  
AC Power-Supply Rejection Ratio  
dB  
V
= 2Vp-p centered at 0V,  
= 100kHz  
OUT  
OUT  
OUT  
OUT  
OUT  
OUT  
OUT  
OUT  
OUT  
f
C
V
= 2Vp-p centered at 0V,  
= 1MHz  
-105  
-105  
-103  
-112  
-107  
-106  
-100  
-99  
f
C
V
= 4Vp-p centered at 0V,  
= 100kHz  
f
C
V
= 4Vp-p centered at 0V,  
= 1MHz  
f
C
V
= 2Vp-p centered at 1V,  
= 100kHz  
f
C
Spurious-Free  
Dynaꢀic Range  
SFDR  
dBc  
V
= 2Vp-p centered at 1V,  
= 1MHz  
f
C
V
= 4Vp-p centered at 2V,  
= 100kHz  
f
C
V
= 4Vp-p centered at 2V,  
= 1MHz  
f
C
V
= 4Vp-p centered at 2V,  
= 1MHz (R = 1k)  
f
C
L
V
= 4Vp-p centered at 2V,  
= 1MHz (R = 10k)  
L
OUT  
-100  
f
C
2.8  
1.8  
2.5  
nV/Hz  
pA/Hz  
pF  
Input Noise Voltage Density  
Input Noise Current Density  
Input Capacitance  
e
f = 100kHz  
f = 100kHz  
n
i
n
C
IN  
Maxiꢀuꢀ Capacitive Load  
Without Sustained Oscillations  
47  
pF  
Output Iꢀpedance  
Crosstalk  
Z
f = 1MHz  
0.2  
dB  
OUT  
MAX4432/MAX4433 f = 1MHz  
-125  
C
Note 2: All devices are 100% production tested at T = +25°C. All teꢀperature liꢀits are guaranteed by design.  
A
4
_______________________________________________________________________________________  
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
Typical Operating Characteristics  
(V  
= +5V, V = -5V, R = 500, C = 0pF, T = +25°C, unless otherwise noted.)  
EE L L A  
CC  
MAX4430/MAX4432  
GAIN FLATNESS vs. FREQUENCY  
MAX4430/MAX4432  
SMALL-SIGNAL GAIN vs. FREQUENCY  
(A = +1V/V)  
MAX4431/MAX4433  
SMALL-SIGNAL GAIN vs. FREQUENCY  
(A  
= +1V/V)  
(A  
= +2V/V)  
VCL  
VCL  
VCL  
1.0  
0.8  
4
4
100mVp-p  
100mVp-p  
100mVp-p  
3
2
1
0
3
2
0.6  
0.4  
1
0.2  
0
0
-1  
-2  
-1  
-2  
-3  
-4  
-5  
-6  
-0.2  
-0.4  
-3  
-4  
-5  
-0.6  
-0.8  
-6  
-1.0  
1M  
10M  
100M  
1G  
1M  
10M  
100M  
1G  
1M  
10M  
100M  
1G  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
MAX4430/MAX4432  
MAX4431/MAX4433  
MAX4431/MAX4433  
LARGE-SIGNAL GAIN vs. FREQUENCY  
(A = +1V/V)  
LARGE-SIGNAL GAIN vs. FREQUENCY  
(A = +2V/V)  
GAIN FLATNESS vs. FREQUENCY  
(A = +2V/V)  
VCL  
VCL  
VCL  
0.5  
4
4
1Vp-p  
1Vp-p  
100mVp-p  
0.4  
0.3  
3
2
3
2
1
1
0.2  
0.1  
0
0
-1  
-2  
-3  
-4  
-5  
-6  
-1  
-2  
-3  
-4  
-5  
-6  
0
-0.1  
-0.2  
-0.3  
-0.4  
-0.5  
1M  
10M  
100M  
1G  
1M  
10M  
100M  
1G  
1M  
10M  
100M  
1G  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
MAX4430/MAX4432  
SMALL-SIGNAL PULSE RESPONSE  
MAX4431/MAX4433  
SMALL-SIGNAL PULSE RESPONSE  
MAX4430/MAX4432  
LARGE-SIGNAL PULSE RESPONSE  
A
VCL  
= +2V/V  
A
VCL  
= +1V/V  
A
VCL  
= +1V/V  
INPUT  
50mV/div  
INPUT  
25mV/div  
INPUT  
500mV/V  
OUTPUT  
50mV/div  
OUTPUT  
50mV/div  
OUTPUT  
500mV/div  
10ns/div  
10ns/div  
10ns/div  
_______________________________________________________________________________________  
5
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
Typical Operating Characteristics (continued)  
(V  
= +5V, V = -5V, R = 500, C = 0pF, T = +25°C, unless otherwise noted.)  
EE L L A  
CC  
MAX4431/MAX4433  
SMALL-SIGNAL PULSE RESPONSE  
MAX4431/MAX4433  
LARGE-SIGNAL PULSE RESPONSE  
MAX4430/MAX4432  
SMALL-SIGNAL PULSE RESPONSE  
A
VCL  
= +2V/V  
A
= +1V/V  
A
= +1V/V  
VCL  
C = 15pF  
L
VCL  
C = 10pF  
L
INPUT  
25mV/div  
INPUT  
250mV/div  
INPUT  
50mV/V  
OUTPUT  
50mV/div  
OUTPUT  
500mV/div  
OUTPUT  
50mV/div  
10ns/div  
10ns/div  
10ns/div  
MAX4431/MAX4433  
LARGE-SIGNAL PULSE RESPONSE  
MAX4430/MAX4432  
LARGE-SIGNAL PULSE RESPONSE  
POWER-SUPPLY REJECTION RATIO  
vs. FREQUENCY  
0
A
VCL  
= +1V/V  
A
= +1V/V  
VCL  
C = 20pF  
L
C = 30pF  
L
-10  
-20  
-30  
-40  
-50  
-60  
-70  
-80  
-90  
-100  
INPUT  
INPUT  
500mV/div  
250mV/div  
OUTPUT  
500mV/div  
OUTPUT  
500mV/div  
10ns/div  
10ns/div  
0.1  
1
10  
100  
FREQUENCY (MHz)  
OUTPUT ISOLATION RESISTANCE  
vs. CAPACITIVE LOAD  
COMMON-MODE REJECTION RATIO  
vs. FREQUENCY  
CLOSED-LOOP OUTPUT IMPEDANCE  
vs. FREQUENCY  
0
12  
10  
8
100  
10  
1
-10  
-20  
MAX4430  
-30  
-40  
-50  
-60  
6
MAX4431  
4
-70  
-80  
0.1  
2
-90  
0
-100  
0.01  
0
25 50 75 100 125 150 175 200  
CAPACITIVE LOAD (pF)  
0.1  
1
10  
100  
0.1  
1
10  
100  
1000  
FREQUENCY (MHz)  
FREQUENCY (MHz)  
6
_______________________________________________________________________________________  
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
Typical Operating Characteristics (continued)  
(V  
= +5V, V = -5V, R = 500, C = 0pF, T = +25°C, unless otherwise noted.)  
CC  
EE  
L
L
A
MAX4430  
GAIN AND PHASE vs. FREQUENCY  
HARMONIC DISTORTION  
vs. FREQUENCY  
HARMONIC DISTORTION  
vs. OUTPUT SWING  
MAX4430 toc19  
120  
80  
0
-10  
-20  
-30  
-40  
-50  
-60  
135  
90  
0
-10  
-20  
-30  
-40  
-50  
-60  
A
V
= 1000  
V
OUT  
= 2Vp-p  
f = 1MHz  
45  
GAIN  
40  
0
0
-70  
-80  
-90  
-100  
-110  
-120  
-130  
-140  
-70  
-80  
-90  
-100  
-110  
-120  
-130  
-140  
-45  
-90  
-135  
-40  
-80  
2ND HARMONIC  
PHASE  
2ND HARMONIC  
3RD HARMONIC  
-120  
-160  
-200  
3RD HARMONIC  
10 100  
-180  
-225  
0.1  
1
10  
100  
1000  
0.1  
1
2
3
4
5
0
1
6
FREQUENCY (MHz)  
FREQUENCY (MHz)  
OUTPUT SWING (Vp-p)  
INPUT VOLTAGE NOISE  
vs. FREQUENCY  
QUIESCENT CURRENT PER AMPLIFIER  
vs. TEMPERATURE  
HARMONIC DISTORTION  
vs. RESISTIVE LOAD  
1000  
100  
0
-10  
-20  
-30  
-40  
-50  
-60  
-70  
-80  
-90  
12.0  
11.5  
11.0  
10.5  
10.0  
9.5  
f = 1MHz  
10  
1
2ND HARMONIC  
3RD HARMONIC  
-100  
-110  
-120  
-130  
-140  
9.0  
1
10  
100 1k  
10k 100k 1M 10M  
200  
600  
400  
RESISTIVE LOAD ()  
1000  
-50  
-25  
0
25  
50  
75  
100  
800  
0
FREQUENCY (Hz)  
TEMPERATURE (°C)  
OFFSET VOLTAGE  
vs. TEMPERATURE  
VOLTAGE SWING  
vs. TEMPERATURE  
INPUT BIAS CURRENT  
vs. TEMPERATURE  
3.0  
2.5  
2.0  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0
12.0  
11.5  
11.0  
10.5  
10.0  
9.5  
1.5  
1.0  
0.5  
0
V +  
OS  
FROM NEGATIVE RAIL  
-0.5  
-1.0  
-1.5  
V
OS  
-
-2.0  
-2.5  
FROM POSITIVE RAIL  
-3.0  
9.0  
-50  
-25  
0
25  
50  
75  
100  
-50  
-25  
0
25  
50  
75  
100  
-50  
-25  
0
25  
50  
75  
100  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
_______________________________________________________________________________________  
7
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
Typical Operating Characteristics (continued)  
(V  
= +5V, V = -5V, R = 500, C = 0pF, T = +25°C, unless otherwise noted.)  
CC  
EE  
L
L
A
VOLTAGE SWING  
vs. TEMPERATURE  
MAX4432/MAX4433  
CROSSTALK vs. FREQUENCY  
0
-20  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0
R = 10kΩ  
L
-40  
FROM NEGATIVE RAIL  
-60  
-80  
-100  
-120  
-140  
FROM POSITIVE RAIL  
0.1  
1
10  
100  
1000  
-50  
-25  
0
25  
50  
75  
100  
FREQUENCY (MHz)  
TEMPERATURE (°C)  
Pin Description  
PIN  
NAME  
FUNCTION  
MAX4430/MAX4431  
5 SOT23  
8 SO  
1
2
6
OUT  
Output  
4
V
Negative Power Supply  
Noninverting Input  
Inverting Input  
EE  
3
3
IN+  
IN-  
4
2
7
5
V
Positive Power Supply  
CC  
1, 5, 8  
N.C.  
No Connection. Not internally connected.  
PIN  
NAME  
FUNCTION  
MAX4432/MAX4433  
8 SO/8 µMAX  
1
2
3
4
5
6
7
8
OUTA  
INA-  
Aꢀplifier A Output  
Aꢀplifier A Inverting Input  
Aꢀplifier A Noninverting Input  
Negative Power Supply  
Aꢀplifier B Noninverting Input  
Aꢀplifier B Inverting Input  
Aꢀplifier B Output  
INA+  
V
EE  
INB+  
INB-  
OUTB  
V
Positive Power Supply  
CC  
8
_______________________________________________________________________________________  
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
and 2 for the MAX4431/MAX4433. Use care in selecting  
Detailed Description  
the value for the resistor ꢀarked R in both circuits.  
S
The MAX4430MAX4433 are wide-bandwidth, ultra-low-  
distortion, voltage-feedback aꢀplifiers. The MAX4430/  
MAX4432 are internally coꢀpensated for unity gain.  
The MAX4431/MAX4433 are internally coꢀpensated for  
gains of +2V/V or greater.  
Froꢀ dynaꢀic stability considerations (based on the  
parts frequency response and the input capacitance of  
the MAX4430MAX4433), the ꢀaxiꢀuꢀ recoꢀꢀended  
value for R is 500. In general, lower R values will  
S
S
yield a higher bandwidth and better dynaꢀic stability,  
at the cost of higher power consuꢀption, higher power  
dissipation in the IC, and reduced output drive avail-  
These aꢀplifiers have ultra-fast 37ns (MAX4430/  
MAX4432) 16-bit settling tiꢀes, 100dB SFDR at 1MHz,  
and 4Vp-p output swing with ꢀiniꢀuꢀ 110dB open-  
loop gain.  
ability. For a ꢀiniꢀuꢀ R value, take into consideration  
S
that the current indicated as I is supplied by the output  
F
stage and ꢀust be discounted froꢀ the ꢀaxiꢀuꢀ out-  
put current to calculate the ꢀaxiꢀuꢀ current available  
High-Speed ADC Input Driver Application  
The MAX4430MAX4433 op aꢀps are ideal for driving  
high-speed 14- to 16-bit ADCs. In ꢀost cases, these  
ADCs operate with a charge balance scheꢀe, with  
capacitive loads internally switched on and off froꢀ the  
input. The driver used ꢀust withstand these changing  
capacitive loads while holding the signal aꢀplitude sta-  
bility consistent with the ADCs resolution and, at the  
saꢀe tiꢀe, have a frequency response coꢀpatible with  
the saꢀpling speed of the ADC (Figure 1).  
to the load. I can be found using the following equa-  
F
tion:  
I = V  
/ R  
S
F
IN(MAX)  
If DC therꢀal stability is an iꢀportant design concern,  
the Thevenin resistance seen by both inputs at DC  
ꢀust be balanced. This includes the resistance of the  
signal source and terꢀination resistors if the aꢀplifier  
signal input is fed froꢀ a transꢀission line. The capaci-  
tance associated with the feedback resistors ꢀust also  
be considered as a possible liꢀitation to the available  
bandwidth or to the dynaꢀic stability. Only resistors  
with sꢀall parallel capacitance specifications should  
be considered.  
Inverting and Noninverting Configurations  
The circuits typically used for the inverting and non-  
inverting configurations of the MAX4430MAX4433 are  
shown in Figures 2a and 2b. The ꢀiniꢀuꢀ uncondition-  
ally stable gain values are 1 for the MAX4430/MAX4432  
Applications Information  
Layout and Power-Supply Bypassing  
The MAX4430MAX4433 have wide bandwidth and  
consequently require careful board layout. To realize  
the full AC perforꢀance of these high-speed aꢀplifiers,  
pay careful attention to power-supply bypassing and  
board layout. The PC board should have a large low-  
iꢀpedance ground plane that is as free of voids as  
possible. Do not use coꢀꢀercial breadboards. Keep  
signal lines as short and straight as possible. Observe  
high-frequency bypassing techniques to ꢀaintain the  
+V  
CC  
HIGH-SPEED  
14/16-BIT ADC  
-V  
EE  
Figure 1. Typical Application Circuit  
R
F
V
IN  
R
S
I
F
V
IN  
V
OUT  
I
F
V
V
R
R
OUT  
F
V
OUT  
A = 1 +  
=
IN  
S
V
- R  
R
OUT  
F
A =  
=
V
IN  
S
R
F
R
S
R
B
Figure 2a. Noninverting Configuration  
Figure 2b. Inverting Configuration  
_______________________________________________________________________________________  
9
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
Ordering Information (continued)  
PART  
TEMP. RANGE  
-40oC to +85oC  
-40oC to +85oC  
-40oC to +85oC  
-40oC to +85oC  
-40oC to +85oC  
-40oC to +85oC  
PIN-PACKAGE  
5 SOT23-5  
8 SO  
MAX4431EUK-T  
MAX4431ESA  
MAX4432EUA  
MAX4432ESA  
MAX4433EUA  
MAX4433ESA  
8 µMAX  
8 SO  
R
ISO  
V
OUT  
V
IN  
R
L
8 µMAX  
8 SO  
C
L
Pin Configurations (continued)  
MAX4430  
TOP VIEW  
MAX4430  
MAX4431  
N.C.  
IN-  
1
2
3
4
8
7
6
5
N.C.  
Figure 3. Capacitive-Load Driving Circuit  
V
CC  
IN+  
OUT  
N.C.  
aꢀplifiers accuracy and stability. In general, use sur-  
face-ꢀount coꢀponents since they have shorter bodies  
and lower parasitic reactance. This will result in  
iꢀproved perforꢀance over through-hole coꢀponents.  
The bypass capacitors should include 1nF and/or  
0.1µF surface-ꢀount ceraꢀic capacitors between each  
supply pin and the ground plane, located as close to  
the package as possible. Place a 10µF tantaluꢀ  
capacitor at the power supplys point of entry to the PC  
board to ensure the integrity of the incoꢀing supplies.  
Input terꢀination resistors and output back-terꢀination  
resistors, if used, should be surface-ꢀount types and  
should be placed as close to the IC pins as possible.  
V
EE  
SO  
MAX4432  
MAX4433  
OUTA  
INA-  
1
2
3
4
8
7
6
5
V
CC  
OUTB  
INB-  
INA+  
V
EE  
INB+  
µMAX/SO  
Driving Capacitive Loads  
MAX4430MAX4433 can drive capacitive loads.  
However, excessive capacitive loads ꢀay cause ring-  
ing or instability at the output as phase ꢀargin is  
reduced. Adding a sꢀall isolation resistor in series with  
the output capacitive load helps reduce the ringing but  
slightly increases gain error (see Typical Operating  
Characteristics and Figure 3).  
Chip Information  
TRANSISTOR COUNT: MAX4430/MAX4431: 103  
MAX4432/MAX4433: 248  
10 ______________________________________________________________________________________  
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
Package Information  
______________________________________________________________________________________ 11  
Dual-Supply, 180MHz, 16-Bit Accurate,  
Ultra-Low Distortion Op Amps  
Package Information (continued)  
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are  
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.  
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600  
© 2000 Maxiꢀ Integrated Products  
Printed USA  
is a registered tradeꢀark of Maxiꢀ Integrated Products.  

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