Datasheet
4
Schematic Diagram
Application Information
Static Protection
All devices are static protected by the use of input diodes.
However, strong static fields should be avoided, as it is
possible for the strong fields to cause degraded diode
junction characteristics, which may result in increased input
leakage currents.
Latchup Avoidance
Junction-isolated CMOS circuits employ configurations
which produce a parasitic 4-layer (PNPN) structure. The
4-layer structure has characteristics similar to an SCR, and
under certain circumstances may be triggered into a low
impedance state resulting in excessive supply current. To
avoid this condition, no voltage greater than 0.3V beyond the
supply rails may be applied to any pin. In general, the op
amp supplies must be established simultaneously with, or
before any input signals are applied. If this is not possible,
the drive circuits must limit input current flow to 2mA to
prevent latchup.
Input Referred Noise Voltage e
N
R
S
= 100Ω, f = 1kHz 25 - 100 - nV/√Hz
Input Referred Noise Current i
N
R
S
= 100Ω, f = 1kHz 25 - 0.01 - pA/√Hz
Supply Current (Per Amplifier)
(No Signal, No Load)
I
SUPPLY
ICL7642, I
Q
= 10µA Low Bias 25 - 0.01 0.03 mA
ICL7641, I
Q
= 1mA High Bias 25 - 1.0 2.5 mA
Channel Separation V
O1
/V
O2
A
V
= 100 25 - 120 - dB
Slew Rate (A
V
= 1, C
L
= 100pF,
V
IN
= 8V
P-P
)
SR ICL7642, I
Q
= 10µA, R
L
= 1MΩ 25 - 0.016 - V/µs
ICL7641, I
Q
= 1mA, R
L
= 10kΩ 25 - 1.6 - V/µs
Rise Time
(V
IN
= 50mV, C
L
= 100pF)
t
R
ICL7642, I
Q
= 10µA, R
L
= 1MΩ 25 - 20 - µs
ICL7641, I
Q
= 1mA, R
L
= 10kΩ 25 - 0.9 - µs
Overshoot Factor
(V
IN
= 50mV, C
L
= 100pF)
OS ICL7642, I
Q
= 10µA, R
L
= 1MΩ 25 - 5 - %
ICL7641, I
Q
= 1mA, R
L
= 10kΩ 25 - 40 - %
Electrical Specifications V
SUPPLY
= ±5V, Unless Otherwise Specified (Continued)
PARAMETER SYMBOL
TEST
CONDITIONS
TEMP.
(
o
C)
ICL7641E, ICL7642E
UNITSMIN TYP MAX
INPUT STAGE
SETTING STAGE
I
Q
OUTPUT STAGE
V+
OUTPUT
V-
Q
N11
Q
N10
Q
N9
C
FF
= 9pF
C
C
= 33pF
Q
P9
Q
P8
Q
P7
Q
P6
6.3V
Q
N7
Q
N6
Q
N5
Q
N4
Q
N8
Q
N3
Q
N1
Q
N2
Q
P1
Q
P2
3K3K
100K
900K
Q
P5
Q
P4
Q
P3
+INPUT
-INPUT
V-
V-
V+
V+
A
C
V-
G
E
V+
TABLE OF JUMPERS I
Q
ICL7621 C, E 100µA
ICL7641 C, G 1mA
ICL7642 A, E 10µA
6.3V
ICL7621, ICL7641, ICL7642