ICL7650 Maxim Integrated Products, ICL7650 Datasheet

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ICL7650

Manufacturer Part Number
ICL7650
Description
Manufacturer
Maxim Integrated Products
Datasheet

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Maxim’s ICL7650/ICL7653 are chopper-stabilized
amplifiers, ideal for low-level signal processing applica-
tions. Featuring high performance and versatility, these
devices combine low input offset voltage, low input bias
current, wide bandwidth, and exceptionally low drift
over time and temperature. Low offset is achieved
through a nulling scheme that provides continuous
error correction. A nulling amplifier alternately nulls
itself and the main amplifier. The result is an input offset
voltage that is held to a minimum over the entire operat-
ing temperature range.
The ICL7650B/ICL7653B are exact replacements for
Intersil’s ICL7650B/ICL7653B. These devices have a
10µV max offset voltage, a 0.1µV/°C max input offset
voltage temperature coefficient, and a 20pA max bias
current—all specified over the commercial temperature
range.
A 14-pin version is available that can be used with
either an internal or external clock. The 14-pin version
has an output voltage clamp circuit to minimize over-
load recovery time.
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
19-0960; Rev 2; 1/00
INPUT
Condition Amplifier
Precision Amplifier
Instrumentation Amplifier
Thermocouples
Thermistors
Strain Gauges
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
General Description
C
CLAMP
ICL7650
ICL7653
R
C
Applications
INVERTING AMPLIFIER
WITH OPTIONAL CLAMP
OUTPUT
Chopper-Stabilized Op Amps
o ICL7650/53 are Improved Second Sources to
o Lower Supply Current: 2mA
o Low Offset Voltage: 1µV
o No Offset Voltage Trimming Needed
o High-Gain CMRR and PSRR: 120dB min
o Lower Offset Drift with Time and Temperature
o Extended Common-Mode Voltage Range
o Low DC Input Bias Current: 10pA
o Monolithic, Low-Power CMOS Design
Pin Configurations appear at end of data sheet.
ICL7650CSA
ICL7650CSD
ICL7650CPA
ICL7650CPD
ICL7650CTV
ICL7650C/D
ICL7650IJA
ICL7650IJD
ICL7650MTV
ICL7650MJD
ICL7650BCSA
ICL7650BCSD
ICL7650BCPA
ICL7650BCPD
ICL7650BCTV
ICL7650BC/D
ICL7653CSA
ICL7653CPA
ICL7653CTV
ICL7653IJA
ICL7653MTV
ICL7653BCSA
ICL7653BCPA
ICL7653BCTV
ICL7650B/53B
PART
TEMP. RANGE
-20°C to +85°C
-20°C to +85°C
-55°C to +125°C
-55°C to +125°C
-20°C to +85°C
-55°C to +125°C
Ordering Information
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 SO
14 SO
8 Plastic DIP
14 Plastic DIP
8 TO-99
Dice
8 CERDIP
14 CERDIP
8 CERDIP
14 CERDIP
8 SO
14 SO
8 Plastic DIP
14 Plastic DIP
8 TO-99
Dice
8 SO
8 Plastic DIP
8 TO-99
8 CERDIP
8 CERDIP
8 SO
8 Plastic DIP
8 TO-99
Features
1

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ICL7650 Summary of contents

Page 1

... Maxim Integrated Products For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. Chopper-Stabilized Op Amps o ICL7650/53 are Improved Second Sources to ICL7650B/53B o Lower Supply Current: 2mA o Low Offset Voltage: 1µ Offset Voltage Trimming Needed ...

Page 2

... Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS—ICL7650B/ICL7653B (Circuit of Figure +5V -5V, T PARAMETER ...

Page 3

... ELECTRICAL CHARACTERISTICS—ICL7650B/ICL7653B (continued) (Circuit of Figure +5V -5V, T PARAMETER SYMBOL Internal Chopping Frequency Clamp On Current (Note 4) Clamp Off Current (Note 4) Offset Voltage vs. Time · Note BIAS Note 3: OUTPUT and CLAMP pins not connected. Note 4: See Output Clamp section for details. ...

Page 4

... Chopper-Stabilized Op Amps ELECTRICAL CHARACTERISTICS—ICL7650/ICL7653 (continued) (Circuit of Figure +5V -5V PARAMETER SYMBOL Common-Mode Rejection Ratio CMRR Power-Supply Rejection Ratio PSRR Input Noise Voltage e np-p Input Noise Current I n Unity-Gain Bandwidth GBW Slew Rate SR Rise Time t r Overshoot Operating Supply Range ...

Page 5

... OPEN-LOOP GAIN AND PHASE SHIFT vs. FREQUENCY 160 140 120 100 10kΩ 0.1µF EXT 20 10k 0.01 0 100 1k FREQUENCY (Hz) VOLTAGE FOLLOWER LARGE-SIGNAL PULSE RESPONSE CLOCK OUT LOW CLOCK OUT HIGH -3 2.5 3.0 -1.0 -0.5 0 0.5 1.0 1.5 2.0 TIME (µs) 10k ICL7650toac09 110 130 10k 100k 2.5 3.0 5 ...

Page 6

... Figure 1. ICL7650 Test Circuit Detailed Description Figure 2 shows the major elements of the ICL7650/ ICL7653. Two amplifiers are illustrated, the main amplifi- er and the nulling amplifier, both of which have offset- null capability. The main amplifier is connected full time from the input to the output. The nulling amplifier, under control of the chopper-frequency oscillator and clock circuit, alternately nulls itself and the main amplifier ...

Page 7

... Nulling Capacitor Connection Separate pins are provided for C the ICL7650. If you do not need the clamp feature, order the ICL7653; this device only offers the C and will produce slightly lower noise and improved AC common-mode rejection. If you need to use the clamp feature, order the ICL7650 and connect the external capacitors to V- ...

Page 8

... Chopper-Stabilized Op Amps Low-leakage, high-impedance CMOS inputs allow the ICL7650/ICL7653 to measure high-impedance sources. Stray leakage paths can decrease input resistance and increase input currents unless inputs are guarded. Boards must be thoroughly cleaned with TCE or alcohol and blown dry with compressed air. The board should be coated with epoxy or silicone after cleaning to pre- vent contamination ...

Page 9

... Supply voltage (±8V max) and output drive capability (10kΩ load for full swing) are the only limitations to consider when replacing other op amps with the ICL7650/ICL7653. Use a simple booster circuit to overcome these limitations (Figure 7). This enables the full output capabilities of the LM118 (or any other standard device combined with the input capabilities of the ICL7650/ICL7653 ...

Page 10

... IN OUTPUT - Figure 7. Using an Industry-Standard 741 to Boost Output Drive Capability +15V +7.5V C EXTA 10µF 0V 0.090" (2.29mm) -INPUT +INPUT V- +7.5V CLAMP +15V 741 ICL7650 -15V -7.5V 10k 0.1µF 0.1µF 10k Chip Topography INT/EXT C EXT/CLK IN EXTB INT/ CLK OUT V+ OUTPUT CLAMP C RETN 0.069" (1.75mm) OUT ...

Page 11

... V+ ICL7650 +INPUT 3 6 OUTPUT CLAMP SO/DIP/CERDIP C EXTA EXTB ICL7653 -INPUT 6 OUTPUT RETN +INPUT Pin Configurations C EXTB EXTA 1 7 -INPUT 2 6 OUTPUT ICL7650 3 5 +INPUT CLAMP 4 V- TO-99 C EXTB OUTPUT ICL7653 5 C RETN 4 V- TO-99 11 ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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