LT6230-10_15 [Linear]
215MHz, Rail-to-Rail Output;
| 型号： | LT6230-10_15 |
| 厂家： | 
Linear |
| 描述： | 215MHz, Rail-to-Rail Output |
| 文件： | 总24页 (文件大小：790K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT6230/LT6230-10
LT6231/LT6232
215MHz, Rail-to-Rail Output,
1.1nV/√Hz, 3.5mA Op Amp Family
FeaTures
DescripTion
The LT®6230/LT6231/LT6232 are single/dual/quad low
noise, rail-to-rail output unity-gain stable op amps that
feature 1.1nV/√Hz noise voltage and draw only 3.5mA of
supply current per amplifier. These amplifiers combine
very low noise and supply current with a 215MHz gain-
bandwidth product, a 70V/µs slew rate and are optimized
for low supply voltage signal conditioning systems. The
LT6230-10 is a single amplifier optimized for higher gain
applications resulting in higher gain bandwidth and slew
rate. The LT6230 and LT6230-10 include an enable pin
that can be used to reduce the supply current to less
than 10µA.
n
Low Noise Voltage: 1.1nV/√Hz
n
Low Supply Current: 3.5mA/Amp Max
n
Low Offset Voltage: 350µV Max
n
Gain Bandwidth Product:
LT6230: 215MHz; A ≥ 1
V
LT6230-10: 1450MHz; A ≥ 10
V
n
Wide Supply Range: 3V to 12.6V
n
Output Swings Rail-to-Rail
n
Common Mode Rejection Ratio: 115dB Typ
n
Output Current: 30mA
n
Operating Temperature Range: –40°C to 85°C
n
LT6230 Shutdown to 10µA Maximum
n
LT6230/LT6230-10 in a Low Profile (1mm)
Theamplifierfamilyhasanoutputthatswingswithin50mV
of either supply rail to maximize the signal dynamic range
in low supply applications and is specified on 3.3V, 5V and
ThinSOT™ Package
n
Dual LT6231 in 8-Pin SO and Tiny DFN Packages
n
LT6232 in a 16-Pin SSOP Package
5Vsupplies.Thee • √I
productof1.9peramplifier
n
SUPPLY
is among the most noise efficient of any op amp.
applicaTions
The LT6230/LT6230-10 are available in the 6-lead SOT-23
package and the LT6231 dual is available in the 8-pin SO
package with standard pinouts. For compact layouts,
the dual is also available in a tiny dual fine pitch leadless
package (DFN). The LT6232 is available in the 16-pin
SSOP package.
n
Ultrasound Amplifiers
n
Low Noise, Low Power Signal Processing
n
Active Filters
Driving A/D Converters
Rail-to-Rail Buffer Amplifiers
n
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Typical applicaTion
Noise Voltage and Unbalanced
Noise Current vs Frequency
Low Noise Low Power Instrumentation Amplifier
6
5
4
3
2
1
0
6
5
4
3
2
1
0
+
V
S
V
= 2ꢀ5V
S
A
T
= 25°C
= 0V
+
IN
R4
499Ω
R6
499Ω
+
V
CM
1/2 LT6231
+
V
S
–
R2
196Ω
+
–
R1
NOISE CURRENT
NOISE VOLTAGE
LT6202
–
V
OUT
10Ω
R3
196Ω
R5
499Ω
R7
V
S
–
499Ω
623012 TA01a
1/2 LT6231
–
IN
A
= 40
I = 10mA
S
EN = 5.8µV
MEASUREMENT BW = 8MHz
+
V
10
100
1k
10k
100k
BW = 5.1MHz
INPUT REFERRED,
FREQUENCY (Hz)
RMS
–
V
S
V
= 1.5V ꢀt 5V
S
623012 TA01b
623012fc
1
LT6230/LT6230-10
LT6231/LT6232
absoluTe MaxiMuM raTings (Note 1)
+
–
Junction Temperature (DD Package).................... 125°C
Storage Temperature Range .................. –65°C to 150°C
Storage Temperature Range
Total Supply Voltage (V to V )..............................12.6V
Input Current (Note 2)......................................... 40mA
Output Short-Circuit Duration (Note 3) ............ Indefinite
Operating Temperature Range (Note 4)....–40°C to 85°C
Specified Temperature Range (Note 5) ....–40°C to 85°C
Junction Temperature ........................................... 150°C
(DD Package)........................................ –65°C to 125°C
Lead Temperature (Soldering, 10 sec)...................300°C
pin conFiguraTion
TOP VIEW
TOP VIEW
+
+
OUT A
–IN A
+IN A
1
2
3
4
8
7
6
5
V
OUT 1
–
6 V
OUT B
–IN B
+IN B
–
+
5 ENABLE
4 –IN
V
2
–
+
–
+IN 3
V
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
T
= 150°C, θ = 250°C/W
JMAX
JA
T
= 125°C, θ = 160°C/W
JMAX
JA
–
UNDERSIDE METAL CONNECTED TO V (PCB CONNECTION OPTIONAL)
TOP VIEW
OUT A
–IN A
+IN A
1
2
3
4
5
6
7
8
16 OUT D
15 –IN D
TOP VIEW
–
+
+–A
D
C
+
OUT A
–IN A
+IN A
1
2
3
4
8
7
6
5
V
14
13
12
11
10
9
+IN D
+
–
OUT B
–IN B
+IN B
V
V
–
+
+
+
–
+IN B
–IN B
OUT B
NC
+IN C
–IN C
OUT C
NC
–
+
–B
–
V
S8 PACKAGE
8-LEAD PLASTIC SO
T
= 150°C, θ = 200°C/W
JA
JMAX
GN PACKAGE
16-LEAD NARROW PLASTIC SSOP
T
JMAX
= 150°C, θ = 135°C/W
JA
623012fc
2
LT6230/LT6230-10
LT6231/LT6232
orDer inForMaTion
LEAD FREE FINISH
LT6230CS6#PBF
LT6230IS6#PBF
LT6230CS6-10#PBF
LT6230IS6-10#PBF
LT6231CS8#PBF
LT6231IS8#PBF
LT6231CDD#PBF
LT6231IDD#PBF
LT6232CGN#PBF
LT6232IGN#PBF
TAPE AND REEL
PART MARKING*
LTAFJ
PACKAGE DESCRIPTION
6-Lead Plastic TS0T-23
SPECIFIED TEMPERATURE RANGE
0°C to 70°C
LT6230CS6#TRPBF
LT6230IS6#TRPBF
LT6230CS6-10#TRPBF
LT6230IS6-10#TRPBF
LT6230CS8#TRPBF
LT6230IS8#TRPBF
LT6231CDD#TRPBF
LT6231IDD#TRPBF
LT6232CGN#TRPBF
LT6232IGN#TRPBF
LTAFJ
6-Lead Plastic TS0T-23
–40°C to 85°C
LTAFK
6-Lead Plastic TS0T-23
0°C to 70°C
LTAFK
6-Lead Plastic TS0T-23
–40°C to 85°C
6231
8-Lead Plastic SO
0°C to 70°C
6231I
8-Lead Plastic SO
–40°C to 85°C
LAEU
0°C to 70°C
8-Lead (3mm × 3mm) Plastic DFN
8-Lead (3mm × 3mm) Plastic DFN
16-Lead Narrow Plastic SSOP
16-Lead Narrow Plastic SSOP
LAEU
–40°C to 85°C
0°C to 70°C
6232
6232I
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
elecTrical characTerisTics TA = 25°C, VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply,
ENABLE = 0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
OS
Input Offset Voltage
LT6230S6, LT6230S6-10
LT6231S8, LT6232GN
LT6231DD
100
50
75
500
350
450
µV
µV
µV
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
100
600
µV
I
I
Input Bias Current
5
10
0.9
0.6
µA
µA
µA
B
I Match (Channel-to-Channel) (Note 6)
B
0.1
0.1
180
1.1
Input Offset Current
OS
Input Noise Voltage
0.1Hz to 10Hz
nV
P-P
e
Input Noise Voltage Density
f = 10kHz, V = 5V
1.7
nV/√Hz
n
S
in
Input Noise Current Density, Balanced Source
Input Noise Current Density, Unbalanced Source
f = 10kHz, V = 5V, R = 10k
1
2.4
pA/√Hz
pA/√Hz
S
S
f = 10kHz, V = 5V, R = 10k
S
S
Input Resistance
Input Capacitance
Large-Signal Gain
Common Mode
6.5
7.5
MΩ
kΩ
Differential Mode
C
A
Common Mode
Differential Mode
2.9
7.7
pF
pF
IN
V = 5V, V = 0.5V to 4.5V, R = 10k to V /2
105
21
5.4
200
40
9
V/mV
V/mV
V/mV
VOL
S
O
L
L
S
V = 5V, V = 0.5V to 4.5V, R = 1k to V /2
S
O
S
S
V = 5V, V = 1V to 4V, R = 100Ω to V /2
S
O
L
V = 3.3V, V = 0.65V to 2.65V, R = 10k to V /2
90
16.5
175
32
V/mV
V/mV
S
O
L
S
V = 3.3V, V = 0.65V to 2.65V, R = 1k to V /2
S
O
L
S
V
CM
Input Voltage Range
Guaranteed by CMRR, V = 5V, 0V
1.5
1.15
4
2.65
V
V
S
Guaranteed by CMRR, V = 3.3V, 0V
S
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
V = 5V, V = 1.5V to 4V
90
90
115
115
dB
dB
S
CM
V = 3.3V, V = 1.15V to 2.65V
S
CM
V = 5V, V = 1.5V to 4V
84
120
dB
S
CM
623012fc
3
LT6230/LT6230-10
LT6231/LT6232
elecTrical characTerisTics TA = 25°C, VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply,
ENABLE = 0V, unless otherwise noted.
SYMBOL PARAMETER
PSRR Power Supply Rejection Ratio
CONDITIONS
V = 3V to 10V
MIN
90
84
3
TYP
115
115
MAX
UNITS
dB
S
PSRR Match (Channel-to-Channel) (Note 6)
Minimum Supply Voltage (Note 7)
V = 3V to 10V
S
dB
V
V
Output Voltage Swing Low (Note 8)
No Load
4
40
mV
mV
mV
mV
OL
OH
I
= 5mA
85
190
460
350
SINK
V = 5V, I
= 20mA
SINK
240
185
S
V = 3.3V, I
= 15mA
SINK
S
V
Output Voltage Swing High (Note 8)
Short-Circuit Current
No Load
5
90
325
250
50
mV
mV
mV
mV
I
= 5mA
200
600
400
SOURCE
V = 5V, I
= 20mA
SOURCE
= 15mA
SOURCE
S
V = 3.3V, I
S
I
I
I
V = 5V
30
25
45
40
mA
mA
SC
S
V = 3.3V
S
Supply Current per Amplifier
Disabled Supply Current per Amplifier
3.15
0.2
3.5
10
mA
µA
S
+
ENABLE = V – 0.35V
ENABLE = 0.3V
ENABLE Pin Current
–25
–75
0.3
µA
V
ENABLE
V
V
ENABLE Pin Input Voltage Low
ENABLE Pin Input Voltage High
Output Leakage Current
Turn-On Time
L
+
V – 0.35V
V
H
+
ENABLE = V – 0.35V, V = 1.5V to 3.5V
0.2
300
41
10
µA
ns
µs
O
t
t
ENABLE = 5V to 0V, R = 1k, V = 5V
L S
ON
Turn-Off Time
ENABLE = 0V to 5V, R = 1k, V = 5V
L S
OFF
GBW
Gain-Bandwidth Product
Frequency = 1MHz, V = 5V
200
1300
MHz
MHz
S
LT6230-10
SR
Slew Rate
V = 5V, A = –1, R = 1k, V = 1.5V to 3.5V
42
60
V/µs
V/µs
S
V
L
O
LT6230-10, V = 5V, A = –10, R = 1k,
250
S
V
L
V = 1.5V to 3.5V
O
FPBW
Full-Power Bandwidth
V = 5V, V
= 3V (Note 9)
4.8
6.3
11
55
MHz
MHz
ns
S
OUT
P-P
LT6230-10, HD2 = HD3 = ≤1%
0.1%, V = 5V, V = 2V, A = –1, R = 1k
t
S
Settling Time (LT6230, LT6231, LT6232)
S
STEP
V
L
623012fc
4
LT6230/LT6230-10
LT6231/LT6232
elecTrical characTerisTics The l denotes the specifications which apply over the 0°C < TA < 70°C
temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply, ENABLE = 0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
l
l
l
V
Input Offset Voltage
LT6230CS6, LT6230CS6-10
LT6231CS8, LT6232CGN
LT6231CDD
600
450
550
µV
µV
µV
OS
l
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
800
µV
l
l
l
l
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
V
= Half Supply
0.5
3
11
1
µV/°C
µA
OS
CM
I
I
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
0.7
µA
OS
l
l
l
A
Large-Signal Gain
V = 5V, V = 0.5V to 4.5V, R = 10k to V /2
78
17
4.1
V/mV
V/mV
V/mV
VOL
S
O
L
S
V = 5V, V = 0.5V to 4.5V, R = 1k to V /2
S
O
L
S
V = 5V, V = 1V to 4V, R = 100Ω to V /2
S
O
L
S
l
l
V = 3.3V, V = 0.65V to 2.65V, R = 10k to V /2
66
13
V/mV
V/mV
S
O
L
S
V = 3.3V, V = 0.65V to 2.65V, R = 1k to V /2
S
O
L
S
V
Input Voltage Range
Guaranteed by CMRR
CM
l
l
V = 5V, 0V
1.5
1.15
4
2.65
V
V
S
Vs = 3.3V, 0V
l
l
CMRR
PSRR
Common Mode Rejection Ratio
V = 5V, V = 1.5V to 4V
90
85
dB
dB
S
CM
V = 3.3V, V = 1.15V to 2.65V
S
CM
l
l
l
l
CMRR Match (Channel-to-Channel) (Note 6) V = 5V, V = 1.5V to 4V
84
85
79
3
dB
dB
dB
V
S
CM
Power Supply Rejection Ratio
V = 3V to 10V
S
PSRR Match (Channel-to-Channel) (Note 6) V = 3V to 10V
S
Minimum Supply Voltage (Note 7)
l
l
l
l
V
V
Output Voltage Swing Low (Note 8)
Output Voltage Swing High (Note 8)
Short-Circuit Current
No Load
= 5mA
50
mV
mV
mV
mV
OL
OH
I
200
500
380
SINK
V = 5V, I
= 20mA
SINK
S
S
V = 3.3V, I
= 15mA
SINK
l
l
l
l
No Load
60
mV
mV
mV
mV
I
= 5mA
215
650
430
SOURCE
V = 5V, I
= 20mA
SOURCE
S
V = 3.3V, I
= 15mA
SOURCE
S
l
l
I
I
I
V = 5V
25
20
mA
mA
SC
S
V = 3.3V
S
l
l
Supply Current per Amplifier
Disabled Supply Current per Amplifier
4.2
mA
µA
S
+
ENABLE = V – 0.25V
ENABLE = 0.3V
1
l
l
l
l
l
l
l
l
l
ENABLE Pin Current
ENABLE Pin Input Voltage Low
ENABLE Pin Input Voltage High
Output Leakage Current
Turn-On Time
–85
0.3
µA
V
ENABLE
V
V
L
+
V – 0.25V
V
H
+
ENABLE = V – 0.25V, V = 1.5V to 3.5V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k, V = 5V
300
65
ns
ON
L
S
Turn-Off Time
ENABLE = 0V to 5V, R = 1k, V = 5V
µs
OFF
L
S
SR
Slew Rate
V = 5V, A = –1, R = 1k, V = 1.5V to 3.5V
35
V/µs
V/µs
MHz
S
V
L
O
LT6230-10, A = –10, R = 1k, V = 1.5V to 3.5V
225
V
L
O
FPBW
Full-Power Bandwidth (Note 9)
V = 5V, V
= 3V ; LT6230C, LT6231C,
3.7
S
OUT
P-P
LT6232C
623012fc
5
LT6230/LT6230-10
LT6231/LT6232
elecTrical characTerisTics The l denotes the specifications which apply over the –40°C < TA < 85°C
temperature range. VS = 5V, 0V; VS = 3.3V, 0V; VCM = VOUT = half supply, ENABLE = 0V, unless otherwise noted. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
l
l
V
Input Offset Voltage
LT6230IS6, LT6230IS6-10
LT6231IS8, LT6232IGN
LT6231IDD
700
550
650
µV
µV
µV
OS
l
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
1000
µV
l
l
l
l
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
V
CM
= Half Supply
0.5
3
µV/°C
µA
OS
I
I
12
1.1
0.8
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
µA
OS
l
l
l
A
VOL
Large-Signal Gain
V = 5V, V = 0.5V to 4.5V, R = 10k to V /2
72
16
3.6
V/mV
V/mV
V/mV
S
O
L
S
V = 5V, V = 0.5V to 4.5V, R = 1k to V /2
S
O
L
S
V = 5V, V = 1V to 4V, R = 100Ω to V /2
S
O
L
S
l
l
V = 3.3V, V = 0.65V to 2.65V, R = 10k to V /2
60
12
V/mV
V/mV
S
O
L
S
V = 3.3V, V = 0.65V to 2.65V, R = 1k to V /2
S
O
L
S
V
Input Voltage Range
Guaranteed by CMRR
V = 5V, 0V
CM
l
l
1.5
1.15
4
2.65
V
V
S
V = 3.3V, 0V
S
l
l
CMRR
PSRR
Common Mode Rejection Ratio
V = 5V, V = 1.5V to 4V
90
85
dB
dB
S
CM
V = 3.3V, V = 1.15V to 2.65V
S
CM
l
l
l
l
CMRR Match (Channel-to-Channel) (Note 6) V = 5V, V = 1.5V to 4V
84
85
79
3
dB
dB
dB
V
S
CM
Power Supply Rejection Ratio
V = 3V to 10V
S
PSRR Match (Channel-to-Channel) (Note 6) V = 3V to 10V
S
Minimum Supply Voltage (Note 7)
l
l
l
l
V
Output Voltage Swing Low (Note 8)
Output Voltage Swing High (Note 6)
Short-Circuit Current
No Load
= 5mA
60
mV
mV
mV
mV
OL
OH
I
210
510
390
SINK
V = 5V, I
= 15mA
SINK
S
S
V = 3.3V, I
= 15mA
SINK
l
l
l
l
V
No Load
70
mV
mV
mV
mV
I
= 5mA
220
675
440
SOURCE
V = 5V, I
= 20mA
SOURCE
S
V = 3.3V, I
= 15mA
SOURCE
S
l
l
I
I
I
V = 5V
15
15
mA
mA
SC
S
V = 3.3V
S
l
l
Supply Current per Amplifier
Disabled Supply Current per Amplifier
4.4
mA
µA
S
+
ENABLE = V – 0.2V
ENABLE = 0.3V
1
l
l
l
l
l
l
l
l
l
ENABLE Pin Current
ENABLE Pin Input Voltage Low
ENABLE Pin Input Voltage High
Output Leakage Current
Turn-On Time
–100
0.3
µA
V
ENABLE
V
V
L
+
V – 0.2V
V
H
+
ENABLE = V – 0.2V, V = 1.5V to 3.5V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k, V = 5V
300
72
ns
ON
L
S
Turn-Off Time
ENABLE = 0V to 5V, R = 1k, V = 5V
µs
OFF
L
S
SR
Slew Rate
V = 5V, A = –1, R = 1k, V = 1.5V to 3.5V
31
V/µs
V/µs
MHz
S
V
L
O
LT6230-10, A = –10, R = 1k, V = 1.5V to 3.5V
185
V
L
O
FPBW
Full-Power Bandwidth (Note 9)
V = 5V, V
= 3V ; LT6230I, LT6231I,
3.3
S
OUT
P-P
LT6232I
623012fc
6
LT6230/LT6230-10
LT6231/LT6232
elecTrical characTerisTics TA = 25°C, VS = 5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
OS
Input Offset Voltage
LT6230, LT6230-10
LT6231S8, LT6232GN
LT6231DD
100
50
75
500
350
450
µV
µV
µV
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
100
600
µV
I
I
Input Bias Current
5
10
0.9
0.6
µA
µA
µA
B
I Match (Channel-to-Channel) (Note 6)
B
0.1
0.1
180
1.1
Input Offset Current
OS
Input Noise Voltage
0.1Hz to 10Hz
f = 10kHz
nV
P-P
e
Input Noise Voltage Density
Input Noise Current Density, Balanced Source
Input Noise Current Density, Unbalanced Source f = 10kHz, R = 10k
1.7
nV/√Hz
n
i
n
f = 10kHz, R = 10k
1
2.4
pA/√Hz
pA/√Hz
S
S
Input Resistance
Input Capacitance
Large-Signal Gain
Common Mode
6.5
7.5
MΩ
kΩ
Differential Mode
C
A
Common Mode
Differential Mode
2.4
6.5
pF
pF
IN
V = 4.5V, R = 10k
140
35
8.5
260
65
16
V/mV
V/mV
V/mV
VOL
O
L
V = 4.5V, R = 1k
O
L
V = 2V, R = 100Ω
O
L
V
Input Voltage Range
Guaranteed by CMRR
–3
95
89
90
84
4
V
dB
dB
dB
dB
CM
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V
CM
V
CM
= –3V to 4V
= –3V to 4V
120
125
115
115
PSRR
V = 1.5V to 5V
S
PSRR Match (Channel-to-Channel) (Note 6)
Output Voltage Swing Low (Note 8)
V = 1.5V to 5V
S
V
V
No Load
4
40
190
460
mV
mV
mV
OL
I
I
= 5mA
= 20mA
85
SINK
SINK
240
Output Voltage Swing High (Note 8)
Short-Circuit Current
No Load
5
50
200
600
mV
mV
mV
OH
I
I
= 5mA
90
SOURCE
SOURCE
= 20mA
325
I
I
30
mA
SC
Supply Current per Amplifier
Disabled Supply Current per Amplifier
3.3
0.2
3.9
mA
µA
S
ENABLE = 4.65V
ENABLE = 0.3V
I
ENABLE Pin Current
–35
–85
0.3
µA
V
ENABLE
V
V
ENABLE Pin Input Voltage Low
ENABLE Pin Input Voltage High
Output Leakage Current
Turn-On Time
L
4.65
V
H
+
ENABLE = V – 4.65V, V = 1V
0.2
300
62
10
µA
ns
µs
O
t
t
ENABLE = 5V to 0V, R = 1k
L
ON
Turn-Off Time
ENABLE = 0V to 5V, R = 1k
OFF
L
GBW
Gain-Bandwidth Product
Frequency = 1MHz
LT6230-10
150
1000
215
1450
MHz
MHz
SR
Slew Rate
A = –1, R = 1k, V = –2V to 2V
50
70
320
7.4
11
V/µs
V/µs
MHz
MHz
ns
V
L
O
LT6230-10, A = –10, R = 1k, V = –2V to 2V
V
L
O
FPBW
Full-Power Bandwidth
Settling Time (LT6230, LT6231, LT6232)
V
OUT
= 3V (Note 9)
5.3
P-P
LT6230-10, HD2 = HD3 ≤ 1%
0.1%, V = 2V, A = –1, R = 1k
t
S
50
STEP
V
L
623012fc
7
LT6230/LT6230-10
LT6231/LT6232
elecTrical characTerisTics The l denotes the specifications which apply over the 0°C < TA < 70°C
temperature range. VS = 5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
l
l
V
Input Offset Voltage
LT6230CS6, LT6230CS6-10
LT6231CS8, LT6232CGN
LT6231CDD
600
450
550
µV
µV
µV
OS
l
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
800
µV
l
l
l
l
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
0.5
3
11
1
µV/°C
µA
OS
I
I
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
0.7
µA
OS
l
l
l
A
Large-Signal Gain
V = 4.5V, R = 10k
100
27
6
V/mV
V/mV
V/mV
VOL
O
L
V = 4.5V, R = 1k
O
L
V = 2V, R = 100Ω
O
L
l
l
l
l
l
V
Input Voltage Range
Guaranteed by CMRR
–3
95
89
85
79
4
V
dB
dB
dB
dB
CM
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V
CM
V
CM
= –3V to 4V
= –3V to 4V
PSRR
V = 1.5V to 5V
S
PSRR Match (Channel-to-Channel) (Note 6) V = 1.5V to 5V
S
l
l
l
V
V
Output Voltage Swing Low (Note 8)
Output Voltage Swing High (Note 8)
Short-Circuit Current
No Load
50
mV
mV
mV
OL
OH
I
I
= 5mA
200
500
SINK
SINK
= 20mA
l
l
l
No Load
60
215
650
mV
mV
mV
I
I
= 5mA
SOURCE
SOURCE
= 20mA
l
I
I
25
mA
SC
l
l
Supply Current per Amplifier
Disabled Supply Current per Amplifier
4.6
mA
µA
S
ENABLE = 4.75V
ENABLE = 0.3V
1
l
l
l
l
l
l
l
l
l
I
ENABLE Pin Current
ENABLE Pin Input Voltage Low
ENABLE Pin Input Voltage High
Output Leakage Current
Turn-On Time
–95
0.3
µA
V
ENABLE
V
V
L
4.75
V
H
ENABLE = 4.75V, V = 1V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k
300
85
ns
ON
L
Turn-Off Time
ENABLE = 0V to 5V, R = 1k
µs
OFF
L
SR
Slew Rate
A = –1, R = 1k, V = –2V to 2V
V
44
V/µs
V/µs
MHz
L
O
LT6230-10, A = –10, R = 1k, V = –2V to 2V
315
V
L
O
FPBW
Full-Power Bandwidth
V
= 3V (Note 9) LT6230C, LT6231C,
4.66
OUT
P-P
LT6232C
623012fc
8
LT6230/LT6230-10
LT6231/LT6232
elecTrical characTerisTics The l denotes the specifications which apply over the –40°C < TA < 85°C
temperature range. VS = 5V, VCM = VOUT = 0V, ENABLE = 0V, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
l
l
V
OS
Input Offset Voltage
LT6230I, LT6230I-10
LT6231IS8, LT6232IGN
LT6231IDD
700
550
650
µV
µV
µV
l
Input Offset Voltage Match
(Channel-to-Channel) (Note 6)
1000
µV
l
l
l
l
V
TC
Input Offset Voltage Drift (Note 10)
Input Bias Current
0.5
3
µV/°C
µA
OS
I
I
12
1.1
0.8
B
I Match (Channel-to-Channel) (Note 6)
B
µA
Input Offset Current
µA
OS
l
l
l
A
Large-Signal Gain
V = 4.5V, R = 10k
93
25
4.8
V/mV
V/mV
V/mV
VOL
O
L
V = 4.5V, R = 1k
O
L
V = 1.5V, R = 100Ω
O
L
l
l
l
l
l
V
Input Voltage Range
Guaranteed by CMRR
–3
95
89
85
79
4
V
dB
dB
dB
dB
CM
CMRR
Common Mode Rejection Ratio
CMRR Match (Channel-to-Channel) (Note 6)
Power Supply Rejection Ratio
V
CM
V
CM
= –3V to 4V
= –3V to 4V
PSRR
V = 1.5V to 5V
S
PSRR Match (Channel-to-Channel) (Note 6) V = 1.5V to 5V
S
l
l
l
V
V
Output Voltage Swing Low (Note 8)
Output Voltage Swing High (Note 8)
Short-Circuit Current
No Load
60
mV
mV
mV
OL
I
I
= 5mA
210
510
SINK
SINK
= 15mA
l
l
l
No Load
70
220
675
mV
mV
mV
OH
I
I
= 5mA
SOURCE
SOURCE
= 20mA
l
I
I
15
mA
SC
l
l
Supply Current per Amplifier
Disabled Supply Current per Amplifier
4.85
mA
µA
S
ENABLE = 4.8V
ENABLE = 0.3V
1
l
l
l
l
l
l
l
l
l
I
ENABLE Pin Current
ENABLE Pin Input Voltage Low
ENABLE Pin Input Voltage High
Output Leakage Current
Turn-On Time
–110
0.3
µA
V
ENABLE
V
V
L
4.8
V
H
ENABLE = 4.8V, V = 1V
1
µA
O
t
t
ENABLE = 5V to 0V, R = 1k
300
72
ns
ON
L
Turn-Off Time
ENABLE = 0V to 5V, R = 1k
µs
OFF
L
SR
Slew Rate
A = –1, R = 1k, V = –2V to 2V
V
37
V/µs
V/µs
MHz
L
O
LT6230-10, A = –10, R = 1k, V = –2V to 2V
260
V
L
O
FPBW
Full-Power Bandwidth (Note 9)
V
OUT
= 3V ; LT6230I, LT6231I, LT6232I
3.9
P-P
Note 4: The LT6230C/LT6230I the LT6231C/LT6231I, and LT6232C/LT6232I
are guaranteed functional over the temperature range of –40°C and 85°C.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Inputs are protected by back-to-back diodes. If the differential
input voltage exceeds 0.7V, the input current must be limited to less than
40mA.
Note 3: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.
Note 5: The LT6230C/LT6231C/LT6232C are guaranteed to meet specified
performance from 0°C to 70°C. The LT6230C/LT6231C/LT6232C are
designed, characterized and expected to meet specified performance from
–40°C to 85°C, but are not tested or QA sampled at these temperatures.
The LT6230I/LT6231I/LT6232I are guaranteed to meet specified
performance from –40°C to 85°C.
623012fc
9
LT6230/LT6230-10
LT6231/LT6232
elecTrical characTerisTics
Note 6: Matching parameters are the difference between the two amplifiers
A and D and between B and C of the LT6232; between the two amplifiers
of the LT6231. CMRR and PSRR match are defined as follows: CMRR and
PSRR are measured in µV/V on the matched amplifiers. The difference is
calculated between the matching sides in µV/V. The result is converted to
dB.
Note 8: Output voltage swings are measured between the output and
power supply rails.
Note 9: Full-power bandwidth is calculated from the slew rate:
FPBW = SR/2πV
P
Note 10: This parameter is not 100% tested.
Note 7: Minimum supply voltage is guaranteed by power supply rejection
ratio test.
Typical perForMance characTerisTics
(LT6230/LT6231/LT6232)
Supply Current vs Supply Voltage
(Per Amplifier)
Offset Voltage vs Input Common
Mode Voltage
VOS Distribution
6
5
4
3
2
1
0
2.0
1.5
100
90
80
70
60
50
40
30
20
10
0
V
V
= 5V, 0V
CM
V = 5V, 0V
S
S
+
= V /2
S8
1.0
T
= 125°C
= 25°C
A
0.5
0
T
A
–0.5
–1.0
–1.5
–2.0
T
= –55°C
A
T = –55°C
A
T
= 25°C
A
T
= 125°C
A
50 100
–200 –150 –100 –50
0
150 200
0
2
4
6
8
10
12
14
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
INPUT OFFSET VOLTAGE (µV)
TOTAL SUPPLY VOLTAGE (V)
INPUT COMMON MODE VOLTAGE (V)
623012 GO1
623012 GO2
623012 GO3
Input Bias Current
vs Common Mode Voltage
Output Saturation Voltage
vs Load Current (Output Low)
Input Bias Current vs Temperature
10
1
14
12
10
8
10
9
V
= 5V, 0V
V = 5V, 0V
S
V
= 5V, 0V
S
S
8
T
= –55°C
A
V
= 4V
CM
7
T
= 125°C
A
0.1
6
T
= 125°C
A
6
V
= 1.5V
T
= –55°C
CM
A
4
T
= 25°C
A
5
0.01
0.001
2
T
= 25°C
A
4
0
–2
3
0
1
3
4
5
6
0.01
0.1
1
10
100
–1
2
–25
0
50
75 100 125
–50
25
LOAD CURRENT (mA)
COMMON MODE VOLTAGE (V)
TEMPERATURE (°C)
623012 GO6
623012 GO4
623012 GO5
623012fc
10
LT6230/LT6230-10
LT6231/LT6232
Typical perForMance characTerisTics
(LT6230/LT6231/LT6232)
Output Short-Circuit Current
vs Power Supply Voltage
Output Saturation Voltage
vs Load Current (Output High)
Minimum Supply Voltage
10
1
70
60
50
40
30
20
1.0
0.8
V
= 5V, 0V
V
= V /2
S
S
CM
SINKING
T
= 125°C
A
0.6
T
= 25°C
A
0.4
T
= –55°C
A
0.2
10
0
T
= 125°C
A
0.1
0
T
= –55°C
A
–10
–20
–30
–40
–50
–60
–70
SOURCING
–0.2
–0.4
–0.6
–0.8
–1.0
T
= 125°C
A
T
= –55°C
A
T
= 25°C
T
= –55°C
A
A
0.01
0.001
T = 125°C
A
T
= 25°C
3.5
A
T
= 25°C
3
A
0.01
0.1
1
10
100
1.5
2
2.5
3.5
4
4.5
5
0.5
1
2
1.5
2.5
3
4 4.5 5
0
LOAD CURRENT (mA)
POWER SUPPLY VOLTAGE ( Vꢀ
TOTAL SUPPLY VOLTAGE (V)
623012 G07
623012 GO9
623012 G08
Open-Loop Gain
Open-Loop Gain
Open-Loop Gain
2.5
2.0
2.5
2.0
2.5
2.0
V
T
= 3V, 0V
= 25°C
V
T
= 5V, 0V
= 25°C
V
T
= 5V
= 25°C
S
A
S
A
S
A
1.5
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
R
= 1k
R
= 1k
R
= 1k
L
L
L
0
0
0
R
= 100Ω
R
= 100Ω
L
–0.5
–1.0
–1.5
–2.0
–2.5
–0.5
–1.0
–1.5
–2.0
–2.5
–0.5
–1.0
–1.5
–2.0
–2.5
R = 100Ω
L
L
0.5
1
2
2.5
3
3.5
4
4.5
5
–4 –3
–1
0
1
2
3
4
5
0
0.5
1
1.5
2
2.5
3
0
1.5
–5
–2
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
623012 G10
623012 G11
623012 G12
Total Noise vs Total Source
Resistance
Offset Voltage vs Output Current
Warm-Up Drift vs Time
100
10
1
2.0
1.5
30
28
26
24
22
20
18
16
14
12
10
T
= 25°C
V
CM
=
S
2.5V
= 0V
V
= 5V
A
S
V
f = 100kHz
UNBALANCED
SOURCE
TOTAL NOISE
T
= –55°C
V
=
5V
A
S
1.0
RESISTORS
0.5
V
=
2ꢀ5V
1ꢀ5V
S
RESISTOR NOISE
0
T
= 25°C
A
V
=
S
–0.5
–1.0
–1.5
–2.0
T = 125°C
A
AMPLIFIER NOISE VOLTAGE
0.1
–60 –45 –30 –15
0
15 30 45 60 75
20
80 100 120 140 160
40 60
TIME AFTER POWER-UP (s)
–75
0
10
100
1k
10k
100k
OUTPUT CURRENT (mA)
SOURCE RESISTANCE (Ω)
623012 G15
623012 G13
623012 G14
623012fc
11
LT6230/LT6230-10
LT6231/LT6232
Typical perForMance characTerisTics
(LT6230/LT6231/LT6232)
Noise Voltage and Unbalanced
Noise Current vs Frequency
0.1Hz to 10Hz Output Voltage
Noise
Gain Bandwidth and Phase
Margin vs Temperature
6
5
4
3
2
1
0
6
5
4
3
2
1
0
V
T
= 2ꢀ5V
70
60
50
40
S
A
C
R
V
= 5pF
= 1k
L
L
= 25°C
= 0V
PHASE MARGIN
V
CM
V
= 5V
= V /2
S
CM
S
V
= 3V, 0V
5V
100nV
S
240
220
200
180
160
140
V
=
S
NOISE CURRENT
NOISE VOLTAGE
–100nV
V
= 3V, 0V
S
GAIN BANDWIDTH
10
100
1k
10k
100k
5s/DIV
–25
35
65
95
125
–55
5
FREQUENCY (Hz)
TEMPERATURE (°C)
623012 G16
623012 G17
623012 G18
Gain Bandwidth and Phase
Margin vs Supply Voltage
Open-Loop Gain vs Frequency
Slew Rate vs Temperature
80
70
60
50
40
30
20
10
0
120
100
80
70
60
50
40
120
110
100
90
C
R
V
= 5pF
T
= 25°C
= 5pF
= 1k
A
= –1
G
L
L
A
L
L
V
ꢀ
= 1k
C
R = R = 1k
= V /2
R
CM
S
PHASE
PHASE MARGIN
V
= 5V ꢀALLING
60
S
V
= 5V
S
240
220
200
180
160
140
V
= 3V, 0V
V
= 5V RISING
40
S
80
S
20
70
0
60
V
= 5V
GAIN BANDWIDTH
V
= 2ꢁ5V ꢀALLING
S
S
–20
–40
–60
–80
50
GAIN
V
= 2ꢁ5V RISING
S
40
V
= 3V, 0V
S
–10
–20
30
20
100k
1M
10M
FREQUENCY (Hz)
100M
1G
2
4
8
10
12
14
0
6
–35 –15
25 45 65 85 105 125
5
TEMPERATURE (°C)
–55
TOTAL SUPPLY VOLTAGE (V)
623012 G19
623012 G20
623012 G21
Common Mode Rejection Ratio
vs Frequency
Output Impedance vs Frequency
Channel Separation vs Frequency
1k
100
10
120
100
80
60
40
20
0
–40
V
= 5V, 0V
A
= 1
S
V
A
–50
–60
T
= 25°C
V
= 5V
S
–70
–80
A
= 10
V
–90
A
= 2
–100
–110
–120
–130
–140
1
V
A
= 1
V
0.1
V
V
= 5V, 0V
S
= V /2
CM
S
0.01
10k
100k
1M
10M
100M
1G
100k
1M
10M
100M
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
623012 G24
623012 G23
623012 G22
623012fc
12
LT6230/LT6230-10
LT6231/LT6232
Typical perForMance characTerisTics
(LT6230/LT6231/LT6232)
Power Supply Rejection Ratio
vs Frequency
Series Output Resistance and
Overshoot vs Capacitive Load
Series Output Resistance and
Overshoot vs Capacitive Load
50
120
100
80
60
40
20
0
50
45
40
35
30
25
20
15
10
5
V
T
= 5V, 0V
V
A
= 5V, 0V
= 1
V
A
= 5V, 0V
= 2
S
A
S
V
S
V
= 25°C
= V /2
45
40
35
30
25
20
15
10
5
V
R
= 10Ω
CM
S
S
R
= 10Ω
S
POSITIVE SUPPLY
R
= 20Ω
S
R
= 20Ω
S
NEGATIVE SUPPLY
R
R
= 50Ω
= 50Ω
S
L
R
R
= 50Ω
= 50Ω
S
L
0
0
1k
10k
100k
1M
10M
100M
10
100
1000
10
100
CAPACITIVE LOAD (pF)
1000
CAPACITIVE LOAD (pF)
FREQUENCY (Hz)
623012 G25
623012 G26
623012 G27
Settling Time vs Output Step
(Noninverting)
Settling Time vs Output Step
(Inverting)
Maximum Undistorted Output
Signal vs Frequency
200
150
100
50
10
9
200
150
100
50
V
= 5V
= 25°C
= –1
V
T
= 5V
= 25°C
= 1
S
S
A
V
500Ω
T
A
A
= –1
V
A
V
A
500Ω
A
= 2
V
8
–
+
V
IN
–
+
V
V
OUT
OUT
7
500Ω
V
IN
6
1mV
1mV
5
1mV
1mV
1
4
V
=
5V
S
A
10mV
10mV
2
10mV
10mV
3
3
T
= 25°C
HD2, HD3 < –40dBc
2
0
0
–3 –2 –1
1
3
4
–4
0
10k
100k
1M
10M
–3 –2 –1
2
4
–4
0
FREQUENCY (Hz)
OUTPUT STEP (V)
OUTPUT STEP (V)
623012 G30
623012 G29
623012 G28
Distortion vs Frequency
Distortion vs Frequency
Distortion vs Frequency
–40
–50
–60
–70
–80
–90
–100
–40
–50
–60
–70
–80
–90
–100
–40
–50
–60
–70
–80
–90
–100
V
A
V
=
2ꢀ5V
V
A
V
=
5V
V
A
V
=
2ꢀ5V
S
V
S
V
S
V
= 1
= 1
= 2
R
= 100Ω, 3RD
L
= 2V
= 2V
= 2V
P-P
OUT
P-P
P-P
OUT
OUT
R
= 100Ω, 3RD
R
= 100Ω, 3RD
L
L
R
= 100Ω, 2ND
L
R
= 100Ω, 2ND
L
R
= 100Ω, 2ND
L
R
= 1k, 2ND
R
L
= 1k, 2ND
L
R
= 1k, 2ND
L
R
= 1k, 3RD
R
= 1k, 3RD
L
L
R
= 1k, 3RD
100k
L
10k
100k
1M
10M
10k
100k
1M
10M
10k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
623012 G31
623012 G32
623012 G33
623012fc
13
LT6230/LT6230-10
LT6231/LT6232
Typical perForMance characTerisTics
(LT6230/LT6231/LT6232)
Distortion vs Frequency
Large-Signal Response
Small-Signal Response
–40
–50
–60
–70
–80
–90
–100
V
A
V
=
5V
S
V
= 2
R = 100Ω, 3RD
L
= 2V
P-P
OUT
2V
0V
R
= 100Ω, 2ND
L
0V
R
= 1k, 3RD
L
–2V
623012 G36
623012 G35
V
A
=
2ꢀ5V
200ns/DIV
V
A
=
= –1
= 1k
2ꢀ5V
200ns/DIV
S
V
L
S
V
L
= 1
R
= 1k, 2ND
L
R
= 1k
R
10k
100k
1M
10M
FREQUENCY (Hz)
623012 G34
Large-Signal Response
Output Overdrive Recovery
5V
0V
0V
0V
–5V
623012 G38
623012 G37
V
S
A
V
=
= 3
2ꢀ.V
200ns/DIV
V
A
=
5V
200ns/DIV
S
V
L
= 1
R
= 1k
(LT6230) ENABLE Characteristics
Supply Current
vs ENABLE Pin Voltage
ENABLE Pin Current
vs ENABLE Pin Voltage
ENABLE Pin Response Time
4.5
4.0
30
25
20
15
10
5
V
A
= 2ꢀ5V
S
V
T
= –55°C
A
= 1
T
= 125°C
A
5V
0V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
T
= 25°C
A
T
T
= 25°C
A
A
T
= –55°C
A
= 125°C
0.5V
0V
623012 G41
V
V
A
=
2.5V
100µs/DIV
S
= 0.5V
IN
= 1
V
V
= 2.5V
S
0
R
= 1k
–2.0
0
1.0
2.0
–1.0
–2ꢀ0
0
1ꢀ0
2ꢀ0
–1ꢀ0
L
PIN VOLTAGE (V)
PIN VOLTAGE (V)
623012 G39
623012 G40
623012fc
14
LT6230/LT6230-10
LT6231/LT6232
Typical perForMance characTerisTics
(LT6230-10)
Gain Bandwidth and Phase
Margin vs Temperature
Series Output Resistor and
Overshoot vs Capacitive Load
Slew Rate vs Temperature
1700
1500
1300
1100
900
600
550
500
450
400
350
300
250
200
150
100
70
A
= 10
A
= –10
V
V
A
= 5V, 0V
= 10
V
ꢀ
G
S
V
V
=
5V
R = 1k
S
60
50
40
30
20
10
0
R
= 100W
R
= 10Ω
S
GAIN BANDWIDTH
V = 5V ꢀALLꢁIG
S
V
= 3V, 0V
S
R
= 20Ω
V
= 5V RꢁSꢁIG
S
S
80
70
60
50
40
R
= 50Ω
S
PHASE MARGIN
V
= 2ꢂ5V RꢁSꢁIG
V
= 5V
S
S
V
5
=
2ꢂ5V ꢀALLꢁIG
S
V
= 3V, 0V
S
–25
0
50
75 100 125
–50
25
–35 –15
25 45 65 85 105 125
10
100
1000
10000
–55
CAPACITIVE LOAD (pF)
TEMPERATURE (°C)
TEMPERATURE (°C)
623012 G44
623012 G42
623012 G43
Open-Loop Gain and Phase
vs Frequency
Gain Bandwidth and Phase
Margin vs Supply Voltage
Gain Bandwidth vs Resistor Load
1600
1400
1200
1000
800
600
400
200
0
1700
1450
1200
950
90
80
70
60
50
40
30
20
10
0
120
V = ±±V
S
T
= 25°C
= 10
= 5pF
= 1k
A
V
L
T
= 2±°C
PHASE
A
C
100
80
A
F
R = 1k
V
=
5V
R = 100
G
R
S
L
V
= 3V, 0V
S
60
GAIN BANDWIDTH
PHASE MARGIN
GAIN
40
20
V
= 3V, 0V
S
0
100
–20
–40
–60
–80
V
= 5V
S
A
C
= 10
= 5pF
= 1k
V
L
L
50
0
R
V
= V /2
CM
S
–10
200
400
800
1000
0
600
2
4
8
10
12
0
6
100k
1M
10M
FREQUENCY (Hz)
100M
1G
TOTAL RESISTOR LOAD (Ω)
(INCLUDES FEEDBACK R)
TOTAL SUPPLY VOLTAGE (V)
623012 G45
623012 G47
623012 G46
Common Mode Rejection Ratio
vs Frequency
Maximum Undistorted Output
Signal vs Frequency
2nd and 3rd Harmonic Distortion
vs Frequency
120
100
80
60
40
20
0
–40
–50
–60
–70
–80
–90
–100
10
V
V
= 5V, 0V
= V /2
V
A
V
=
2ꢀ5V
= 10
= 2V
S
CM
S
V
9
8
7
6
5
4
3
2
1
0
S
P-P
OUT
R
= 100Ω, 2ND
L
R
= 100Ω, 3RD
L
R
R
= 1k, 3RD
= 1k, 2ND
L
L
V
= 5V
= 25°C
= 10
S
A
V
T
A
HD = HD ≤ 40dBc
2
3
10k
100k
1M
10M
100M
1G
10k
100k
1M
10M
10k
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
623012 G50
623012 G49
623012 G48
623012fc
15
LT6230/LT6230-10
LT6231/LT6232
Typical perForMance characTerisTics
(LT6230-10)
2nd and 3rd Harmonic Distortion
vs Frequency
Large-Signal Response
Output-Overload Recovery
–40
–50
–60
–70
–80
–90
–100
V
A
V
=
5V
= 10
= 2V
S
V
P-P
OUT
R
= 100Ω, 2ND
L
R
= 100Ω, 3RD
L
0V
0V
0V
R
= 1k, 3RD
L
R
= 1k, 2ND
L
623012 G53
623012 G52
V
A
= 5V, 0V
= 10
100ns/DIV
V
A
=
5V
100ns/DIV
S
V
F
S
V
F
= 10
R = 900Ω
R = 900Ω
= 100Ω
R
= 100Ω
R
10k
100k
1M
10M
G
G
FREQUENCY (Hz)
623012 G51
Input Referred High Frequency
Noise Spectrum
Small-Signal Response
10
2.5V
0
623012 G54
V
A
= 5V, 0V
= 10
100ns/DIV
S
V
F
100kHz
50MHz
5MHz/DIV
623012 G55
R = 900Ω
R
= 100Ω
G
623012fc
16
LT6230/LT6230-10
LT6231/LT6232
applicaTions inForMaTion
Amplifier Characteristics
be limited to 40mA. This implies 25Ω of protection re-
sistance is necessary per volt of overdrive beyond 0.7V.
These input diodes are rugged enough to handle transient
currents due to amplifier slew rate overdrive and clipping
without protection resistors.
Figure 1 is a simplified schematic of the LT6230/LT6231/
LT6232, which has a pair of low noise input transistors
Q1 and Q2. A simple current mirror, Q3/Q4, converts the
differential signal to a single-ended output, and these
transistors are degenerated to reduce their contribution
to the overall noise.
The photo of Figure 2 shows the output response to an
input overdrive with the amplifier connected as a voltage
follower. With the input signal low, current source I satu-
1
Capacitor C1 reduces the unity-cross frequency and im-
proves the frequency stability without degrading the gain
rates and the differential drive generator drives Q6 into
–
saturation so the output voltage swings all the way to V .
bandwidth of the amplifier. Capacitor C sets the overall
M
The input can swing positive until transistor Q2 saturates
into current mirror Q3/Q4. When saturation occurs, the
outputtriestophaseinvert, butdiodeD2conductscurrent
from the signal source to the output through the feedback
connection. The output is clamped a diode drop below the
input. In this photo, the input signal generator is limiting
at about 20mA.
amplifier gain bandwidth. The differential drive generator
supplies current to transistors Q5 and Q6 that swing the
output from rail-to-rail.
Input Protection
Thereareback-to-backdiodes,D1andD2acrossthe+and
– inputs of these amplifiers to limit the differential input
voltage to 0.7V. The inputs of the LT6230/LT6231/LT6232
do not have internal resistors in series with the input tran-
sistors. This technique is often used to protect the input
devices from overvoltage that causes excessive current
to flow. The addition of these resistors would significantly
degrade the low noise voltage of these amplifiers. For
instance, a 100Ω resistor in series with each input would
generate 1.8nV/√Hz of noise, and the total amplifier noise
voltage would rise from 1.1nV/√Hz to 2.1nV/√Hz. Once
the input differential voltage exceeds 0.7V, steady-state
current conducted through the protection diodes should
2.5V
0V
–2.5V
623012 F02
500µs/DIV
Figure 2. VS = 2.5V, AV = 1 with Large Overdrive
+V
+V
Q5
C
M
DESD5
Q3
Q4
V
OUT
–V
+V
DESD6
C1
DESD2
DIFFERENTIAL
DESD1
DRIVE GENERATOR
–V
D2
–V
+V
–V
Q1
Q2
IN
Q6
D1
+V
+V
IN
BIAS
ENABLE
I
1
DESD3
DESD4
–V
–V
623012 F01
Figure 1. Simplified Schematic
623012fc
17
LT6230/LT6230-10
LT6231/LT6232
applicaTions inForMaTion
With the amplifier connected in a gain of A ≥ 2, the output
The product of e • √I
is an interesting way to
SUPPLY
V
N
can invert with very heavy overdrive. To avoid this inver-
sion, limit the input overdrive to 0.5V beyond the power
supply rails.
gauge low noise amplifiers. Most low noise amplifiers
with low eN have high I current. In applications that
SUPPLY
require low noise voltage with the lowest possible supply
current, this product can prove to be enlightening. The
ESD
LT6230/LT6231/LT6232 have an e • √I
product of
SUPPLY
N
only 1.9 per amplifier, yet it is common to see amplifiers
The LT6230/LT6231/LT6232 have reverse-biased ESD
protection diodes on all inputs and outputs as shown in
Figure 1. If these pins are forced beyond either supply,
unlimited current will flow through these diodes. If the
current is transient and limited to one hundred milliamps
or less, no damage to the device will occur.
with similar noise specifications to have e • √I
as
N
SUPPLY
high as 13.5.
For a complete discussion of amplifier noise, see the
LT1028 data sheet.
ENABLE Pin
Noise
The LT6230 includes an ENABLE pin that shuts down the
amplifier to 10µA maximum supply current. The ENABLE
pinmustbedrivenlowtooperatetheamplifierwithnormal
supply current. The ENABLE pin must be driven high to
ThenoisevoltageoftheLT6230/LT6231/LT6232isequiva-
lent to that of a 75Ω resistor, and for the lowest possible
noise it is desirable to keep the source and feedback resis-
tance at or below this value, i.e., R + R ||R ≤ 75Ω. With
+
within 0.35V of V to shut down the supply current. This
S
G
FB
R + R ||R = 75Ω the total noise of the amplifier is:
can be accomplished with simple gate logic; however
care must be taken if the logic and the LT6230 operate
from different supplies. If this is the case, then open-drain
logic can be used with a pull-up resistor to ensure that
the amplifier remains off. See the Typical Performance
Characteristics.
S
G
FB
2
2
e =√(1.1nV) +(1.1nV) = 1.55nV/√Hz
N
Below this resistance value, the amplifier dominates the
noise, but in the region between 75Ω and about 3k, the
noise is dominated by the resistor thermal noise. As the
totalresistanceisfurtherincreasedbeyond3k,theamplifier
noise current multiplied by the total resistance eventually
dominates the noise.
The output leakage current when disabled is very low;
however, current can flow into the input protection diodes
D1 and D2 if the output voltage exceeds the input voltage
by a diode drop.
623012fc
18
LT6230/LT6230-10
LT6231/LT6232
Typical applicaTions
Single Supply, Low Noise, Low Power, Bandpass Filter with Gain = 10
Frequency Response Plot of
Bandpass Filter
C2
47pF
R1
732Ω
23
1
f
0
=
= 1MHz
+
2πRC
V
C = √C1C2, R = R1 = R2
C1
1000pF
732Ω
0.1µF
R3
R2
f
f
=
MHz, MAXIMUM f = 1MHz
0
0
(
)
R
f
10k
732Ω
0
2.5
=
V
–
+
–3dB
IN
3
LT6230
EN
V
OUT
A
= 20dB at f
V
0
EN = 4µV
INPUT REFERRED
+
RMS
I
= 3.7mA FOR V = 5V
S
R4
10k
C3
0.1µF
623012 F03
–7
100k
1M
10M
FREQUENCY (Hz)
623012 F04
Low Noise, Low Power, Single Supply, Instrumentation Amplifier with Gain = 100
R1
30.9Ω
R2
511Ω
+
C2
2200pF
V
C8
68pF
–
U1
LT6230-10
+
R15
88.7Ω
R10
511Ω
V
V
+
IN1
EN
C1
1µF
R13
2k
–
+
R6
511Ω
U3
V
OUT
LT6230
EN
R3
30.9Ω
R4
511Ω
R16
88.7Ω
C9
68pF
R12
511Ω
+
V
R14
2k
C4
10µF
R5
511Ω
–
V
= 100 (V – V )
IN1
R1 = R3
U2
OUT
IN2
R2 = R4
LT6230-10
R2
R1
R10
GAIN =
+ 1
R10 = R12
R15 = R16
(
) (R15)
V
+
IN2
EN
INPUT RESISTANCE = R5 = R6
= 310Hz TO 11MHz
C3
1µF
f
–3dB
EN = 20µV
INPUT REFERRED
RMS
I
S
= 10.5mA FOR V = 5V, 0V
S
623012 F05
623012fc
19
LT6230/LT6230-10
LT6231/LT6232
package DescripTion
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
2.90 BSC
(NOTE 4)
0.62
MAX
0.95
REF
1.22 REF
1.4 MIN
1.50 – 1.75
2.80 BSC
3.85 MAX 2.62 REF
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45
6 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
DATUM ‘A’
0.01 – 0.10
1.00 MAX
0.30 – 0.50 REF
1.90 BSC
0.09 – 0.20
(NOTE 3)
S6 TSOT-23 0302 REV B
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
623012fc
20
LT6230/LT6230-10
LT6231/LT6232
package DescripTion
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698 Rev C)
0.70 ±0.05
3.5 ±0.05
2.10 ±0.05 (2 SIDES)
1.65 ±0.05
PACKAGE
OUTLINE
0.25 ± 0.05
0.50
BSC
2.38 ±0.05
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
R = 0.125
0.40 ± 0.10
TYP
5
8
3.00 ±0.10
(4 SIDES)
1.65 ± 0.10
(2 SIDES)
PIN 1
TOP MARK
(NOTE 6)
(DD8) DFN 0509 REV C
4
1
0.25 ± 0.05
0.75 ±0.05
0.200 REF
0.50 BSC
2.38 ±0.10
BOTTOM VIEW—EXPOSED PAD
0.00 – 0.05
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
623012fc
21
LT6230/LT6230-10
LT6231/LT6232
package DescripTion
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
.045 ±.005
NOTE 3
.050 BSC
7
5
8
6
.245
MIN
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.030 ±.005
TYP
1
3
4
2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
NOTE:
INCHES
1. DIMENSIONS IN
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
SO8 0303
GN Package
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.189 – .196*
(4.801 – 4.978)
.045 ±.005
.009
(0.229)
REF
16 15 14 13 12 11 10 9
.254 MIN
.150 – .165
.229 – .244
.150 – .157**
(5.817 – 6.198)
(3.810 – 3.988)
.0165 ±.0015
.0250 BSC
RECOMMENDED SOLDER PAD LAYOUT
1
2
3
4
5
6
7
8
.015 ± .004
(0.38 ± 0.10)
× 45°
.0532 – .0688
(1.35 – 1.75)
.004 – .0098
(0.102 – 0.249)
.007 – .0098
(0.178 – 0.249)
0° – 8° TYP
.016 – .050
(0.406 – 1.270)
.0250
(0.635)
BSC
.008 – .012
GN16 (SSOP) 0204
(0.203 – 0.305)
TYP
NOTE:
1. CONTROLLING DIMENSION: INCHES
INCHES
2. DIMENSIONS ARE IN
(MILLIMETERS)
3. DRAWING NOT TO SCALE
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
623012fc
22
LT6230/LT6230-10
LT6231/LT6232
revision hisTory (Revision history begins at Rev C)
REV
DATE
DESCRIPTION
PAGE NUMBER
C
1/11
Updated ENABLE Pin section in Applications Information
18
623012fc
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
23
LT6230/LT6230-10
LT6231/LT6232
Typical applicaTions
The LT6230 is applied as a transimpedance amplifier with
an I-to-V conversion gain of 1.5kΩ set by R1. The LT6230
is ideally suited to this application because of its low
input offset voltage and current, and its low noise. This is
because the 1.5k resistor has an inherent thermal noise
of 5nV/√Hz or 3.4pA/√Hz at room temperature, while the
LT6230 contributes only 1.1nV and 2.4pA /√Hz. So, with
respect to both voltage and current noises, the LT6230 is
actually quieter than the gain resistor.
the photodiode, it induces a current I which flows into
PD
the amplifier circuit. The amplifier output falls negative
to maintain balance at its inputs. The transfer function
is therefore V
= –I • 1.5k. C1 ensures stability and
PD
OUT
goodsettlingcharacteristics. Outputoffsetwasmeasured
at 280µV, so low in part because R2 serves to cancel the
DC effects of bias current. Output noise was measured
at 1.1mV on a 100MHz measurement bandwidth, with
P-P
C2 shunting R2’s thermal noise. As shown in the scope
photo, the rise time is 17ns, indicating a signal bandwidth
of 20MHz.
Thecircuitusesanavalanchephotodiodewiththecathode
biased to approximately 200V. When light is incident on
Low Power Avalanche Photodiode Transimpedance Amplifier
IS = 3.3mA
Photodiode Amplifier Time Domain Response
≈200V BIAS
C1
4.7pF
ADVANCED PHOTONIX
012-70-62-541
WWW.ADVANCEDPHOTONIX.COM
R1
1.5k
5V
–
R2
1.5k
LT6230
+
623012 TA02b
–5V
50ns/DIV
ENABLE
623012 TA02a
C2
0.1µF
OUTPUT OFFSET = 500µV TYPICAL
BANDWIDTH = 20MHz
OUTPUT NOISE = 1.1mV (100MHz MEASUREMENT BW)
P-P
relaTeD parTs
PART NUMBER
LT1028
DESCRIPTION
COMMENTS
Single, Ultralow Noise 50MHz Op Amp
Single, Low Noise Rail-to-Rail Amplifier
Single/Dual, Low Noise 325MHz Rail-to-Rail Amplifier
Single/Dual, Low Noise 165MHz
0.85nV/√Hz
LT1677
3V Operation, 2.5mA, 4.5nV/√Hz, 60µV Max V
OS
LT1806/LT1807
LT6200/LT6201
2.5V Operation, 550µV Max V , 3.5nV/√Hz
OS
0.95nV√Hz, Rail-to-Rail Input and Output
LT6202/LT6203/LT6204 Single/Dual/Quad, Low Noise, Rail-to-Rail Amplifier
1.9nV/√Hz, 3mA Max, 100MHz Gain Bandwidth
623012fc
LT 0111 REV C • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
24
●
●
LINEAR TECHNOLOGY CORPORATION 2003
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
相关型号：
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