ISL28274 Datasheet, PDF (6/18 Pages) Intersil Corporation – Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifier and Precision Operational Amplifier

ISL28274, ISL28474
Typical Performance Curves V₊ = +5V, V_- = GND, VCM = 1/2V₊, T_A = +25°C, unless otherwise specified. (Continued)
120
100
80
60
40
A_V = 100
20
PSRR-
PSRR+
0
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
FIGURE 7. AMPLIFIER “A” (IN-AMP) PSRR vs FREQUENCY
700
600
500
400
300
200
100
0
1
A_V = 100
10
100
1k
10k
FREQUENCY (Hz)
100k
FIGURE 8. AMPLIFIER “A” (IN-AMP) INPUT VOLTAGE NOISE
SPECTRAL DENSITY
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1
A_V = 100
10
100
1k
10k
100k
FREQUENCY (Hz)
FIGURE 9. AMPLIFIER “A” (IN-AMP) INPUT CURRENT
NOISE SPECTRAL DENSITY
+1
0
-1
V₊, V_- = ±2.5V
R_L = 1k
-2
-3
V₊, V_- = ±2.5V
R_L = 10k
-4
-5
V_OUT = 50mV_P-P
-6 ^AV ^{= 1}
C_L = 3pF
-7 R_F = 0/R_G = INF
8
1k
10k
100k
FREQUENCY (Hz)
V₊, V_- = ±1.2V
R_L = 1k
V₊, V_- = ±1.2V
R_L = 10k
1M
5M
FIGURE 11. AMPLIFIER “B” (OP-AMP) FREQUENCY
RESPONSE vs SUPPLY VOLTAGE
TIME (1s/DIV)
FIGURE 10. AMPLIFIER “A” (IN-AMP) 0.1Hz TO 10Hz INPUT
VOLTAGE NOISE
45
40
35
30
25
20
15
A_V = 100
R_L = 10kΩ
10 ^{CL = 3pF}
R_F = 100kΩ
5 RG = 1kΩ
0
100
1k
V₊, V_- = ±2.5V
V₊, V_- = ±1.2V
V₊, V_- = ±1.0V
10k
100k
1M
FREQUENCY (Hz)
FIGURE 12. AMPLIFIER “B” (OP-AMP) FREQUENCY
RESPONSE vs SUPPLY VOLTAGE
6
FN6345.3
May 14, 2009