LT1168 Linear Technology, LT1168 Datasheet - Page 9

• Manufacturer Part Number: LT1168
• Description: Low Power/ Single Resistor Gain Programmable/ Micropower Precision Instrumentation Amplifier
• Manufacturer: Linear Technology

BLOCK
TYPICAL PERFOR A CE CHARACTERISTICS
160
140
120
100
80
60
40
20
0
0.1
Negative Power Supply Rejection
Ratio vs Frequency
V
T
G = 100
G = 10
G = 1
A
+
= 25 C
= 15V
1
DIAGRAM
35
30
25
20
15
10
5
0
0
G = 1000
Warm-Up Drift
10
FREQUENCY (Hz)
TIME AFTER POWER-ON (MINUTES)
100
1
–IN
+IN
R
R
G
G
2
1
8
3
1k
W
2
W
V
V
–
–
10k
400
400
R3
R4
1168 G21
3
U
SO-8
N-8
100k
V
V
+
+
4
1168 G24
160
140
120
100
Q1
Q2
80
60
40
20
0
5
0.1
PREAMP STAGE
Positive Power Supply Rejection
Ratio vs Frequency
VB
VB
Figure 1. Block Diagram
V
T
A
–
= 25 C
= –15V
1
+
–
+
–
24.7k
24.7k
R1
R2
G = 100
G = 10
G = 1
A1
A2
10
FREQUENCY (Hz)
C1
C2
100
G = 1000
1k
30k
30k
R5
R7
DIFFERENCE AMPLIFIER STAGE
10k
–100
–200
–300
–400
–500
1168 G22
500
400
300
200
100
100k
–
0
+
–75 –50 –25
Input Bias and Offset Current vs
Temperature
A3
30k
30k
R6
R8
V
V
S
CM
= 15V
= 0V
160
140
120
100
80
60
40
20
V
V
0
–
–
0.1
Common Mode Rejection Ratio vs
Frequency (1k Source Impedance)
TEMPERATURE
0
V
T
1k SOURCE IMBALANCE
S
A
6
5
7
4 V
1168 F01
= 15V
= 25 C
G = 1000
G = 100
G = 10
G = 1
1
25
OUTPUT
REF
V
+
–
50
10
FREQUENCY (Hz)
75
I
I
100
OS
B
100 125
1168 G30
1k
LT1168
10k
1168 G23
9
100k