ISL28617 Datasheet, PDF (11/18 Pages) Intersil Corporation – 40V Precision Instrumentation Amplifier with Differential ADC Driver

ISL28617
Typical Performance Curves V_CC = V_CO = 15V, V_EE = V_EO = -15V, V_CM = 0V, R_L = Open, unless otherwise specified.
140
1000nV
120
100
100nV
1pA
80
i_N
60 A_V = 1000
40 ^{AV = 100}
A_V = 10
20 A_V = 1
0 ^{AV = 0.1}
1
10
100
1k
10k
100k 1M
FREQUENCY (Hz)
FIGURE 27. CMRR R_F = 121k
10nV
e_N
0.1pA
1nV
0.1
1
10
100
1k
FREQUENCY (Hz)
0.01pA
10k
100k
FIGURE 28. INPUT VOLTAGE AND CURRENT NOISE
INPUT
STAGE
FEEDBACK
STAGE
OUTPUT
STAGE
V_CC
0.1µF
IN-
500Ω
I1
I2
I3
I4
A5
I1, I3 +
I2, I4
A6
-
IN+
500Ω
+
-A1
Q1 Q2
+
A2-
100µA
+
-A3
Q3 Q4
+
A4
-
100µA
V_EE
0.1µF
+R_IN
+R_INSENSE
I_S1 I_S2
I_S3 I_S4
R_IN
-R_IN
+R_FB
R_FB
-R_FB
GND
-R_INSENSE -R_FBSENSE
GAIN RESISTORS AND
+R_FBSENSE
KELVIN CONNECTIONS
FIGURE 29. ISL28617 FUNCTIONAL BLOCK DIAGRAM
V_CO
0.1µF
+V_OUT
-V_OUT
V_FB-
V_FB+
V_CMO
V_EO
0.1µF
11
FN6562.0
May 25, 2012