LT1168 Datasheet, PDF (8/20 Pages) Linear Technology – Low Power, Single Resistor Gain Programmable, Micropower Precision Instrumentation Amplifier

LT1168
TYPICAL PERFOR A CE CHARACTERISTICS
Change in Input Bias Current for
V_CM = 20V
20
V_S = ±15V
18 V_CM = ±10V
16 ^{TA = 25°C}
302 N8 (2 LOTS)
313 SO-8 (2 LOTS)
615 TOTAL PARTS
14
12
R_INCM = 5TΩ
10
R_INCM = 700GΩ
8
6
4
2
0
0 4 8 12 16 20 24 28 32 34
CHANGE IN INPUT BIAS CURRENT (pA)
1168 G19
Settling Time vs Step Size
10
V_S = ±15
8 G=1
6
T_A = 25°C
C_L = 30pF
4 ^RL ^{= 1k}
2
0
–2
–4
TO 0.1%
TO 0.01%
0V
V_OUT
0V
V_OUT
–6
–8
–10
8
TO 0.01%
TO 0.1%
10 12 14 16 18 20 22 24 26 28 30 32
SETTLING TIME (µs)
1168 G20
Settling Time vs Gain
1000
V_S = ± 15V
T_A = 25°C
∆V_OUT = 10V TO 0.01%
100
10
1
1
10
100
1000
GAIN
1168 G21
Settling Time (0.1%)
vs Load Capacitance
34
32
G = 1, FALLING EDGE
30 ^{G = 1, RISING EDGE}
28 _{G = 100, FALLING EDGE}
26
24 G = 100,
RISING EDGE
22
G = 10,
FALLING EDGE
20 VS = ± 15V
T_A = 25°C
18 R_L = 1k
STEP SIZE = 10V
16
10
30
100
G = 10,
RISING EDGE
300
1000
LOAD CAPACITANCE (pF)
1168 G22
Input Bias and Offset Current
vs Temperature
500
V_S = ±15V
400 V_CM = 0V
300
200
I_OS
100
0
I_B
–100
–200
–300
–400
–500
–75 –50 –25 0 25 50 75 100 125
TEMPERATURE
1168 G23
Falling Edge Settling Time
(0.10%)
0
–5
– 10
0
–5
– 10
t=0
T_A = 25°C
V_S = ±15V
R_L = 2k
C_L = 15pF
5µs/DIV
0.10
0.05
0
0.05
0.10
1168 G24
Rising Edge Settling Time
(0.10%)
10
5
0
10
5
0
t=0
T_A = 25°C
V_S = ±15V
R_L = 2k
C_L = 15pF
5µs/DIV
0.10
0.05
0
0.05
0.10
1168 G25
Settling Time (0.01%)
vs Load Capacitance
36
G = 100,
34 _{FALLING EDGE}
G = 100,
RISING EDGE
32
G = 1, RISING EDGE
30
28
G = 10, FALLING EDGE
26
24 ^{G = 10, RISING EDGE}
22 VS = ± 15V
T_A = 25°C
20 R_L = 1k
STEP SIZE = 10V
18
10
30
100
G = 1,
FALLING
EDGE
300
1000
LOAD CAPACITANCE (pF)
1168 G26
Undistorted Output Swing
vs Frequency
35
30 ^{G = 10, 100, 1000}
V_S = ±15V
T_A = 25°C
25 _{G = 1}
20
15
10
5
0
1
10
100
1000
FREQUENCY (kHz)
1168 G27
8