6
LT1002
1002fb
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
±DIFFERENTIAL INPUT (VOLTS)
0.1
0
INVERTING
OR
NON-INVERTING
INPUT
BIAS
CURRENT
(mA)
10
20
30
1.0
3.0
0.3
10
30
1002 G12
VS = ±15V
TA = 25°C
IB ≈ 1 nA
Input Bias Current vs.
Differential Input Voltage
TEMPERATURE (
°C)
–50
1200k
1000k
800k
600k
400k
200k
0
25
75
1002 G13
–25
0
50
100
125
OPEN
LOOP
VOLTAGE
GAIN
(V/
V)
VS = ±15V, VO = ±12V
VS = ±3V, VO = ±1V
Matching and Individual Amplifier
Bias and Offset Currents vs Temperature
TEMPERATURE (
°C)
–50
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
25
75
1001 G10
–25
0
50
100
125
INPUT
BIAS
AND
OFFSET
CURRENTS
(nA)
VS = ±15V
MATCHING: NON INVERTING
BIAS CURRENT
MA
TCH
ING: IN
VERING &
NO
N-IN
V. OFF
SET CURR
ENT
IND
IVID
UAL
AMP
BIAS
CURRENT
IND
IVID
UAL
AMP OFF
SET CURRENT
COMMON-MODE INPUT VOLTAGE
–15
INPUT
BIAS
CURRENT
(nA)
1.5
1.0
0.5
0
–.5
–1.0
–1.5
–10
–5
0
5
1002 G11
10
15
VS = ±15V
TA = 25°C
DEVICE WITH POSITIVE INPUT CURRENT
DEVICE WITH NEGATIVE INPUT CURRENT
–
+
VCM
Ib
COMMON-MODE
INPUT RESISTANCE =
= 280G
28V
0.1nA
Input Bias Current
Over the Common Mode Range
Open Loop Voltage Gain
vs Temperature
FREQUENCY (Hz)
0.1
OPEN
LOOP
VOLTAGE
GAIN
(dB)
10M
1002 G14
10
100
10k
1M
1
1k
100k
140
120
100
80
60
40
20
0
–20
TA = 25°C
VS = ±15V
VS = ±3V
Open Loop Voltage Gain
Frequency Response
FREQUENCY (MHz)
0.1
0.2
0.5
VOLTAGE
GAIN
(dB)
PHASE
SHIFT
(DEGREES)
1
1002 G15
PHASE MARGIN –55
°C = 63°
125
°C = 57°
20
16
12
8
4
0
–4
–8
80
100
120
140
160
180
200
220
2
PHASE 25
°C
GAIN 125
°C
VS = ±15V
GAIN 25
°C & –55°C
25
°C
PHASE
MARGIN
= 60
°
Gain, Phase Shift vs. Frequency
Open Loop Gain Mismatch
vs Frequency
FREQUENCY (Hz)
1
OPEN
LOOP
GAIN
MISMATCH
(PERCENT)
1.0
0.8
0.6
0.4
0.2
0
10k
1002 G16
10
100
1k
100k
VS = ±15V
TA = 25°C
PERCENT GAIN MISMATCH =
OUTPUT A – OUTPUT B
1
/2(OUTPUT A + OUTPUT B)
× 100%
FREQUENCY (Hz)
1
OUTPUT
IMPEDANCE
(
)
100
10
1
0.1
0.01
0.001
10k
1002 G17
10
100
1k
100k
AV = 1000
AV = +1
IO = ±1mA
VS = ±15V
TA = 25°C
Closed Loop Output Impedance
Power Supply Rejection and
PSRR Match vs Frequency
FREQUENCY (Hz)
POWER
SUPPLY
REJECTION
(dB)
160
140
120
100
80
60
40
20
0
1002 G18
0.1
1
10
100
1k
10k
100k
VS = ±15V ±2V pp
TA = 25°C
MATCH (NEGATIVE SUPPLY)
MATCH (POSITIVE SUPPLY)
POSITIVE SUPPLY
NEGATIVE SUPPLY