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AD8641ARZ-REEL7
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Product Detailed Parameters
- Description：IC OPAMP JFET 1 CIRCUIT 8SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Amplifier Type：J-FET
- Number of Circuits：1
- Output Type：Rail-to-Rail
- Slew Rate：3V/µs
- Gain Bandwidth Product：3.5 MHz
- Current - Input Bias：0.25 pA
- Voltage - Input Offset：70 µV
- Current - Supply：200µA
- Current - Output / Channel：12 mA
- Voltage - Supply Span (Min)：5 V
- Voltage - Supply Span (Max)：26 V
- Operating Temperature：-40°C ~ 125°C
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- -3db Bandwidth：-
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Overview
The AD8641ARZ-REEL7 is a single-channel, low-power precision JFET operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail output capability and operates on single supplies from 5 V to 26 V or dual supplies from ±2.5 V to ±13 V. Key electrical specifications include a maximum input offset voltage of 750 µV, a maximum input bias current of 1 pA, and a gain-bandwidth product of 3.5 MHz at ±13 V. The device draws a typical supply current of 290 µA and maintains stability with capacitive loads exceeding 500 pF without phase reversal.
Feature Summary
- Extremely low input bias current characteristic of JFET technology
- Rail-to-rail output swing capability for maximizing dynamic range
- Unity-gain stable operation without phase reversal issues
- Low quiescent power consumption suitable for battery-powered systems
Applications
- Photodiode amplifiers
- Precision current sensing
- Line- or battery-powered instruments
- Medical instrumentation
- Portable audio equipment
Procurement Notes
Verify the package type matches the required PCB footprint, as the AD8641 series includes multiple options such as SC70 and SOIC. Confirm RoHS compliance status if environmental regulations apply to the manufacturing process. Ensure the ordering suffix corresponds to the reel packaging format rather than tube distribution. Cross-reference the specific temperature range requirements against the industrial specification limits provided in the datasheet.
Selection Notes
Select this component when high input impedance and low bias current are critical for signal integrity. The rail-to-rail output allows for efficient use of low-voltage single-supply systems. Consider the thermal resistance characteristics if operating near the upper temperature limits. Evaluate the noise density specifications against the application's sensitivity requirements for optimal performance.
Part Context
This part belongs to the AD8641/AD8642/AD8643 family of low-power precision amplifiers. The AD8641 variant specifically provides a single amplifier channel, whereas other members offer dual or quad configurations. All variants share similar electrical characteristics but differ in pin counts and physical package dimensions to accommodate various board space constraints.
Replacement Considerations
Direct substitutes within the same family include the AD8641AKSZ-R2 (SC70 package) and AD8641ARZ (tube packaging). Verify that any replacement maintains the same JFET input stage and rail-to-rail output specifications to ensure circuit compatibility.
