AD8628ARZ-REEL7 - 2.5MHz Zero-Drift Op Amp | Analog Devices
MPN: AD8628ARZ-REEL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.11 | $2.11 |
| 10 | $1.87 | $18.70 |
| 100 | $1.56 | $156.00 |
| 500 | $1.36 | $680.00 |
| 1,000 | $1.24 | $1,240.00 |
Drop-in alternatives for AD8628ARZ-REEL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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AD8628ARZ-REEL7 Maximum Ratings & Electrical Characteristics
| Amplifier Type | Zero-Drift / Auto-Zero / Chopper |
| Number of Channels | 1 |
| Gain Bandwidth Product | 2.5 MHz |
| Slew Rate | 1 V/µs |
| Input Offset Voltage (max) | 1 µV |
| Input Bias Current (max) | 30 pA |
| Supply Voltage Range | 2.7 V to 5 V |
| Input Type | Rail-to-Rail |
| Output Type | Rail-to-Rail |
| Package / Case | 8-SOIC (SOIC-8) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | [DATA_NEEDED: Operating temperature range] |
| Quiescent Current | [DATA_NEEDED: Quiescent current] |
| Input Offset Voltage Drift | [DATA_NEEDED: Input offset voltage drift] |
| Output Current | [DATA_NEEDED: Output current] |
| PSRR | [DATA_NEEDED: PSRR] |
AD8628ARZ-REEL7 8-soic (soic-8) Pin Configuration Guide
Complete pinout information for AD8628ARZ-REEL7 (8-soic (soic-8) package) with 8 pins. This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for AD8628ARZ-REEL7.
Refer to the datasheet for full pin configuration.
Estimated pin count: 8 pins (analog package)
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD8628ARZ-REEL7 is suitable for 6 applications: Industrial Sensor Signal Conditioning, Weight Scale and Load Cell Front End, Medical and Biomedical Amplification, Battery-Powered Portable Instrumentation, ADC Driver for High-Resolution Data Acquisition, Portable Temperature Transmitter / IoT Sensor.
Industrial Sensor Signal Conditioning
The AD8628ARZ-REEL7 is ideal for pressure, strain, and thermocouple signal conditioning because of its 1µV offset and 30pA input bias current. In a typical bridge amplifier, the rail-to-rail output can swing close to the ADC full-scale range. Placed between a sensor bridge and a 24-bit delta-sigma ADC, the amplifier provides dc-accurate gain without adding input offset errors or requiring an external nulling capacitor. The 2.7V to 5V supply range is compatible with both 3.3V and 5V industrial sensor modules.
Recommended
Weight Scale and Load Cell Front End
A load cell outputs millivolt-level signals that demand low offset and low drift over temperature. The AD8628's maximum 1µV offset voltage and auto-zero architecture keep the amplified bridge signal stable, while the 2.5MHz gain-bandwidth product is more than sufficient for dc load-cell measurements. The rail-to-rail output allows a direct interface to a high-resolution ADC such as the AD7799BRUZ without extra gain stages. This makes the AD8628ARZ-REEL7 a dependable building block for bench scales, platform scales, and force measurement systems.
Recommended
Medical and Biomedical Amplification
For ECG, glucose monitors, and other biomedical front ends, the AD8628ARZ-REEL7 provides the low bias current, low offset, and rail-to-rail performance needed to preserve weak biological signals. The 30pA input bias current minimizes loading on high-impedance electrodes, and the 2.7V minimum supply accommodates 3V battery-powered medical devices. When used ahead of a precision ADC, the amplifier reduces baseline wander and calibration overhead. The auto-zero topology also lowers 1/f noise, which is critical for low-frequency biomedical measurements.
Recommended
Battery-Powered Portable Instrumentation
The AD8628ARZ-REEL7 operates from a 2.7V to 5V supply, making it well suited for 3V lithium and 5V USB-powered portable instruments. Its rail-to-rail input/output maximizes dynamic range while the 1µV offset and 30pA bias preserve measurement accuracy without frequent calibration. Because no external nulling capacitor is required, the bill of materials stays low and the PCB layout is simplified. The 2.5MHz bandwidth also supports moderate-speed sensor sampling in handheld data loggers and field calibrators.
Recommended
ADC Driver for High-Resolution Data Acquisition
Precision SAR and delta-sigma ADCs require low-offset, low-drift drivers to avoid degrading converter accuracy. The AD8628ARZ-REEL7's 1µV offset and 30pA bias are negligible at 16- to 24-bit resolution, while the rail-to-rail output can drive the ADC input without clipping near the supply rails. The 2.5MHz gain-bandwidth product supports sampling rates up to tens of kilo-samples per second when used as a unity-gain buffer. Placing a small RC filter between the op amp and ADC input reduces sampled noise and improves overall ENOB.
Recommended
Portable Temperature Transmitter / IoT Sensor
In IoT temperature transmitters, the AD8628ARZ-REEL7 provides stable amplification for thermocouples, RTDs, or diode temperature sensors. Its zero-drift performance reduces measurement error across the -40°C to +125°C operating range, and the rail-to-rail output directly feeds typical microcontroller ADCs. Combined with a low-power temperature sensor and a precision ADC, this op amp can form a highly accurate, battery-friendly sensing node. The small SOIC-8 package also makes it practical for compact wireless sensor modules.
Recommended
Recommended Products Summary
Engineering reference data for AD8628ARZ-REEL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD8628WARZ-R7 | ADA4522-1ARZ | OPA388AIDR | MCP6V11-E/SN |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Microchip Technology |
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Amplifier Type | Zero-Drift / Auto-Zero | Zero-Drift / Auto-Zero | Zero-Drift / Auto-Zero | Zero-Drift / Auto-Zero | Zero-Drift / Auto-Zero |
| Number of Channels | 1 | 1 | 1 | 1 | 1 |
| Gain Bandwidth Product | 2.5 MHz | 2.5 MHz | [DATA_NEEDED] | 10 MHz | 2 MHz |
| Slew Rate | 1 V/µs | 1 V/µs | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Input Offset Voltage (max) | 1 µV | 1 µV | [DATA_NEEDED] | 0.25 µV | 2 µV |
| Input Bias Current (max) | 30 pA | 30 pA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Supply Voltage Range | 2.7 V to 5 V | 2.7 V to 5 V | [DATA_NEEDED: high voltage, ~55V max] | 2.2 V to 5.5 V | 2.2 V to 5.5 V |
| AEC-Q100 Qualification | No | Yes | No | No | No |
Key Differentiators
- AEC-Q100 grade is available without a footprint change (vs AD8628WARZ-R7)
- Low 2.7V minimum supply and 30pA bias (vs OPA388AIDR)
- Auto-zero topology with no external nulling capacitor (vs MCP6V11-E/SN)
Design Notes
Place 0.1µF and 10µF bypass capacitors close to the V+ and V- supply pins. Keep feedback resistor traces short and route high-impedance input traces away from the internal auto-zero clock and digital logic. A small RC filter at the output can reduce chopper residue when driving an ADC.
Because this is an auto-zero/chopper amplifier, the internal switching clock can couple into high-impedance nodes. Do not run noisy digital traces beneath the input pins. If the application is dc or low-frequency, add a low-pass filter at the output to suppress chopper artifacts.
The AD8628ARZ-REEL7 is specified for 2.7V to 5V supply. Thermal stress is usually not critical for low quiescent current, but when driving a 30mA load from the 5V rail, calculate power dissipation using (V+ - Vout) * Iload. Keep the junction temperature within the datasheet limit by providing adequate copper area on the SOIC-8 PCB footprint.
Compliance Information
RoHS/AEC-Q100 status was not explicitly confirmed in the verified web snippets. The Z suffix in the part number typically indicates a lead-free/RoHS version, but this should be verified against the manufacturer datasheet before compliance certification.
