LT1996 Linear Technology, LT1996 Datasheet - Page 7

• Manufacturer Part Number: LT1996
• Description: 100uA Gain Selectable Amplifier
• Manufacturer: Linear Technology

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PI FU CTIO S
P9 (Pin 1): Noninverting Gain-of-9 input. Connects a 50k
internal resistor to the op amp’s noninverting input.
P27 (Pin 2): Noninverting Gain-of-27 input. Connects a
(50k/3) internal resistor to the op amp’s noninverting input.
P81 (Pin 3): Noninverting Gain-of-81 input. Connects a
(50k/9) internal resistor to the op amp’s noninverting input.
V
(in single supply applications), or a negative voltage (in
split supply applications).
REF (Pin 5): Reference Input. Sets the output level when
difference between inputs is zero. Connects a 450k internal
TYPICAL PERFOR A CE CHARACTERISTICS
50mV/DIV
EE
4
50
40
30
20
10
U
0
(Pin 4): Negative Power Supply. Can be either ground
0.5
Gain vs Frequency
GAIN = 81
GAIN = 27
GAIN = 9
Small Signal Transient Response,
Gain = 9
1
U
FREQUENCY (kHz)
10
10µs/DIV
U
(Difference Amplifier Configuration)
100
V
T A = 25°C
W
S
= 5V, 0V
1996 G16
500
1996 G18
U
–10
40
30
20
10
0
50mV/DIV
0.1
Gain and Phase vs Frequency
PHASE
(RIGHT AXIS)
GAIN
(LEFT AXIS)
Small Signal Transient Response,
Gain = 27
1
FREQUENCY (kHz)
10
20µs/DIV
resistor to the op amp’s noninverting input.
OUT (Pin 6): Output. V
(V
V
2.7V to 36V above the V
M81 (Pin 8): Inverting Gain-of-81 input. Connects a
(50k/9) internal resistor to the op amp’s inverting input.
M27 (Pin 9): Inverting Gain-of-27 input. Connects a
(50k/3) internal resistor to the op amp’s inverting input.
M9 (Pin 10): Inverting Gain-of-9 input. Connects a 50k
internal resistor to the op amp’s inverting input.
CC
P3
(Pin 7): Positive Power Supply. Can be anything from
V
T A = 25°C
GAIN = 9
– V
S
100
= 5V, 0V
1996 G17
M3
) + 81 • (V
400
(Difference Amplifier Configuration)
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
–200
1996 G19
50mV/DIV
P9
OUT
– V
EE
0
0.01Hz to 1Hz Voltage Noise
V
T
MEASURED IN G =117
REFERRED TO OP AMP INPUTS
= V
Small Signal Transient Response,
Gain = 81
voltage.
A
M9
S
10 20 30 40 50 60 70 80 90 100
= 25°C
= ±15V
REF
).
+ 9 • (V
TIME (s)
50µs/DIV
P1
LT1996
– V
M1
) + 27 •
1996 G21
7
1996 G20
1996f