Datasheet

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 3.00.3 10 30
1002 G12
V
S
= ±15V
T
A
= 25°C
I
B
≈ 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)
V
S
= ±15V, V
O
= ±12V
V
S
= ±3V, V
O
= ±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)
V
S
= ±15V
MATCHING: NON INVERTING
BIAS CURRENT
M
A
T
C
H
I
N
G
:
I
N
V
E
R
I
N
G
&
N
O
N
-
I
N
V
.
O
F
F
S
E
T
C
U
R
R
E
N
T
I
N
D
I
V
I
D
U
A
L
A
M
P
B
I
A
S
C
U
R
R
E
N
T
I
N
D
I
V
I
D
U
A
L
A
M
P
O
F
F
S
E
T
C
U
R
R
E
N
T
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
V
S
= ±15V
T
A
= 25°C
DEVICE WITH POSITIVE INPUT CURRENT
DEVICE WITH NEGATIVE INPUT CURRENT
–
+
V
CM
I
b
COMMON-MODE
INPUT RESISTANCE = = 280GΩ
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 1M1
1k
100k
140
120
100
80
60
40
20
0
–20
T
A
= 25°C
V
S
= ±15V
V
S
= ±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
V
S
= ±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
V
S
= ±15V
T
A
= 25°C
PERCENT GAIN MISMATCH =
OUTPUT A – OUTPUT B
1
/
2
(OUTPUT A + OUTPUT B)
× 100%
FREQUENCY (Hz)
1
OUTPUT IMPEDANCE (Ω)
100
10
1
0.1
0.01
0.001
10k
1002 G17
10
100
1k
100k
A
V
= 1000
A
V
= +1
I
O
= ±1mA
V
S
= ±15V
T
A
= 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
V
S
= ±15V ±2V pp
T
A
= 25°C
MATCH (NEGATIVE SUPPLY)
MATCH (POSITIVE SUPPLY)
POSITIVE SUPPLY
NEGATIVE SUPPLY