ICL7641CMJD Maxim Integrated Products, ICL7641CMJD Datasheet - Page 24

• Manufacturer Part Number: ICL7641CMJD
• Description: OP Amp Quad GP ±8V/16V 14-Pin CDIP N
• Manufacturer: Maxim Integrated Products
• Type: General Purpose Amplifierr

Specifications of ICL7641CMJD

• Package: 14CDIP N
• Typical Gain Bandwidth Product: 0.044 MHz
• Number Of Channels Per Chip: 4
• Typical Input Noise Voltage Density: 100@±5V nV/rtHz
• Typical Noninverting Input Noise Current Density: 0.01@±5V pA/rtHz
• Typical Slew Rate: 0.16@±5V V/us
• Typical Voltage Gain: 104 dB
• Maximum Input Bias Current: 0.00005@±5V uA
• Minimum Cmrr: 60 dB
• Power Supply Type: Single|Dual
• Minimum Dual Supply Voltage: ±1 V
• Maximum Dual Supply Voltage: ±8 V
• Typical Dual Supply Voltage: ±3|±5 V
• Minimum Single Supply Voltage: 2 V
• Maximum Single Supply Voltage: 16 V
• Typical Single Supply Voltage: 3|5|9|12|15 V
• Maximum Input Offset Voltage: 10@±5V mV
• Maximum Operating Supply Voltage: ±8|16 V

Single/Dual/Triple/Quad
Operational Amplifiers
24
Figure 9. Low Droop Rate Sample and Hold—S2 improves
accuracy and acquisition time by including the voltage drop
across S1 inside the feedback loop. R1 closes the feedback
loop of A1 during the hold phase. The droop rate is [I
+ I
Figure 11. Pico Ammeter—The response time of this curcuit is
R
output and the inverting terminal of the amplifier.
FB
LEAK(S1
V
IN
x C
______________________________________________________________________________________
CONTROL
INPUT
S/H
FB
, where C
ICL7622
) + I
CURRENT
SOURCE
1
A1
⁄
2
LEAK(S2)
100kΩ
R
FB
1
]/C
is the stray capacitance between the
HOLD
R
FB
+
-
C
- 10
FB
IH5141
.
S1
11
Ω
S2
C
HOLD
ICL7622
1
A2
V
⁄
2
O
= 100mV/pA
BIAS(AZ
V
OUT
)
Figure 10. Long-Time Constant Integrator—With R
the time constant of this integrator is 100,000s. Since the input
voltage is converted to a current by R
far exceed the power-supply range.
Figure 12. 60Hz Twin “T“ Notch Filter—The low 1pA bias cur-
rent of the ICL7611 allows use of small 540pF and 270pF
capacitors, even with a notch frequency of 60Hz. The 60Hz
rejection is approximately 40dB.
V
IN
V
V
IN
IN
Typical Operating Circuit
10MΩ
270pF
(Detailed Circuit Diagram — Figure 10)
LONG TIME CONSTANT INTEGRATOR
5MΩ
R
R
IN
IN
540pF
10MΩ
270pF
+
-
+
-
C
1µF
C
INT
INT
IN
, the input voltage can
-
+
ICL7611
V
V
OUT
OUT
IN
= 1011 Ω ,
OUTPUT