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Analog Devices Inc. AD8629TRZ-EP-R7
- Part No.:
- AD8629TRZ-EP-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8629TRZ-EP-R7.pdf
- Description:
- IC OPAMP ZER-DRIFT 2CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,197
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Product details
Overview
AD8629TRZ-EP-R7 from Analog Devices is a zero-drift, single-supply, rail-to-rail input/output operational amplifier optimized for precision DC-coupled signal conditioning. It delivers 1 μV typical offset voltage, 0.002 μV/°C typical drift, and 0.5 μV p-p (0.1 Hz to 10 Hz) voltage noise - enabling high-accuracy amplification in strain gage and thermocouple sensor front-ends operating across −55°C to +125°C.
For engineers reviewing the AD8629TRZ-EP-R7 datasheet, AD8629TRZ-EP-R7 pinout, AD8629TRZ-EP-R7 application, or AD8629TRZ-EP-R7 equivalent, key selection criteria include extended-temperature performance, ultralow drift under single 2.7 V–5 V supply, rail-to-rail output swing at ±15 mV from rails (RL = 10 kΩ), and SOIC_N package compatibility with legacy analog signal chains.
Technical Context
The AD8629TRZ-EP-R7 employs Analog Devices' proprietary auto-zero architecture to eliminate 1/f noise and minimize offset drift without chopper switching artifacts. Its dual-stage correction loop operates continuously, achieving <0.05 μV/°C max drift over −55°C to +125°C while maintaining 2.5 MHz gain bandwidth and 1 V/μs slew rate.
This amplifier supports true rail-to-rail operation on both inputs and outputs: common-mode input range extends from V− to V+, and output swings within 15 mV of either rail at 10 kΩ load. It achieves 130 dB typical CMRR and PSRR, enabling stable performance in noisy industrial power environments with minimal external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 1 μV typical - enables sub-10 ppm error in 1 V full-scale precision current sensing without calibration. |
| Offset Drift | 0.002 μV/°C typical - ensures <0.1 μV total drift over −55°C to +125°C, critical for unattended aerospace sensor nodes. |
| Noise (0.1–10 Hz) | 0.5 μV p-p - preserves resolution in low-frequency medical instrumentation like ECG front-ends. |
| Supply Range | 2.7 V to 5 V single supply - allows direct interface with Li-ion battery systems and 3.3 V logic without level-shifting. |
| Output Swing | Within 15 mV of rails (RL = 10 kΩ) - maximizes dynamic range in single-supply data acquisition systems. |
| CMRR / PSRR | 130 dB typical - rejects power supply ripple and common-mode interference in motor control feedback loops. |
| Quiescent Current | 1.0 mA per amplifier - supports low-power, always-on sensor monitoring with minimal thermal impact. |
Pinout & Package
AD8629TRZ-EP-R7 is housed in an 8-lead narrow SOIC_N (R-8) package per JEDEC MS-012-AA, with exposed pad omitted and standard lead finish. Pin numbering follows top-view orientation with Pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output - drives low-impedance loads up to ±30 mA; rail-to-rail swing enables full utilization of ADC input range. |
| 2 | –IN A | Inverting input - high-impedance node (100 pA max IB); requires matched trace routing to minimize offset error from leakage currents. |
| 3 | +IN A | Non-inverting input - identical impedance to –IN A; used for unity-gain buffer or differential pair configuration. |
| 4 | V− | Negative supply rail - connects to ground in single-supply operation; must be low-impedance to maintain PSRR performance. |
| 5 | +IN B | Non-inverting input of second amplifier - independent channel; no internal connection to Channel A. |
| 6 | –IN B | Inverting input of second amplifier - electrically isolated from Channel A; supports dual-channel sensor conditioning. |
| 7 | OUT B | Output of second amplifier - identical specs to OUT A; enables dual-sensor readout or signal redundancy without extra ICs. |
| 8 | V+ | Positive supply rail - accepts 2.7 V to 5 V; bypass capacitor (0.1 μF ceramic) required adjacent to pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-zero architecture | Eliminates 1/f noise and thermal drift without introducing chopper clock feedthrough, enabling clean DC amplification. |
| Rail-to-rail I/O | Full input range (V− to V+) and output swing within 15 mV of rails preserve SNR in single-supply systems with limited headroom. |
| Enhanced product qualification | AQEC-compliant manufacturing with controlled baseline, single fab/test site, and −55°C to +125°C operation for defense/aerospace use. |
| Low 1/f noise | 0.5 μV p-p (0.1–10 Hz) supports high-resolution measurements in slow-varying physical sensors (e.g., pressure transducers). |
| No external capacitor required | Integrated auto-zero capacitor eliminates board space, cost, and reliability risk associated with external timing components. |
Applications
| Pressure Sensor Interface | Medical ECG Front-End |
|---|---|
|
Use Scenario: Amplifying mV-level bridge output from MEMS pressure sensors in avionics environmental monitoring units. IC Role / Device Role / Timing Role: Precision instrumentation amplifier stage with ultra-low drift to maintain calibration over wide temperature excursions. Use Value: 0.002 μV/°C drift ensures <0.12 μV total offset shift across −55°C to +125°C, eliminating field recalibration needs. |
Use Scenario: Low-noise, DC-coupled amplification of biopotential signals from dry-electrode ECG patches. IC Role / Device Role / Timing Role: First-stage gain block with rail-to-rail output driving 16-bit SAR ADC input directly. Use Value: 0.5 μV p-p (0.1–10 Hz) noise preserves microvolt-level ST-segment morphology without additional filtering. |
| Thermocouple Cold-Junction Compensation | Precision Current Sensing |
|
Use Scenario: Amplifying cold-junction reference voltage from RTD in industrial furnace controllers. IC Role / Device Role / Timing Role: High-PSRR buffer isolating RTD measurement from noisy 24 V supply rails. Use Value: 130 dB PSRR suppresses 24 V supply ripple, preventing false temperature readings during PWM actuator switching. |
Use Scenario: Shunt-based current monitoring in satellite power distribution units with ±0.1% accuracy requirement. IC Role / Device Role / Timing Role: Low-offset difference amplifier measuring 50 mV drop across 100 μΩ shunt resistor. Use Value: 1 μV offset contributes <0.002% error at 50 mV full scale, meeting AS6081 Class A compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ | Same zero-drift architecture but rated only to +105°C; 0.5 μV p-p noise identical; SOIC-8 package. | Lacks AQEC qualification and extended −55°C rating; unsuitable for space-grade or military platforms. | Select AD8628ARZ only for commercial/industrial designs where extended temperature is not required. |
| LTC2057HMS8#PBF | Higher 0.25 μV max offset (vs. 5 μV max for AD8629TRZ-EP-R7); 1.5 MHz GBP; MSOP-8 package. | Smaller footprint but lower drive strength (±10 mA vs. ±30 mA); no enhanced product documentation support. | Choose LTC2057HMS8#PBF when board area is constrained and −55°C operation is unnecessary. |
Compared with AD8628ARZ and LTC2057HMS8#PBF, the AD8629TRZ-EP-R7 uniquely combines AQEC compliance, −55°C to +125°C operation, and ±30 mA output drive in SOIC-8 - making it the only option qualified for flight-critical analog signal conditioning without derating or redesign.
Availability
AD8629TRZ-EP-R7 is available at Aetrix Electronics and suitable for aerospace sensor interfaces, medical diagnostic equipment, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8629TRZ-EP-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD8629-EP product line delivers radiation-tolerant, extended-temperature precision amplifiers for defense, aerospace, and high-reliability industrial systems where long-term parametric stability is non-negotiable.
FAQ
What is the maximum operating temperature range for the AD8629TRZ-EP-R7?
The AD8629TRZ-EP-R7 is specified for continuous operation from −55°C to +125°C. This extended range is validated per AQEC standards and supported by controlled manufacturing baseline, single-fab production, and enhanced product change notification - making it suitable for spacecraft thermal vacuum chambers and jet engine control modules.
Does the AD8629TRZ-EP-R7 require external capacitors for auto-zero operation?
No, the AD8629TRZ-EP-R7 integrates all auto-zero timing capacitance internally. Unlike chopper-stabilized amplifiers, it needs no external capacitor - simplifying layout, reducing BOM count, and eliminating capacitor-related aging or microphonic effects that could degrade long-term DC accuracy in the AD8629TRZ-EP-R7.
How does the AD8629TRZ-EP-R7 achieve rail-to-rail output swing?
The AD8629TRZ-EP-R7 uses complementary output transistors with adaptive biasing to drive within 15 mV of V+ and V− at 10 kΩ load. This architecture avoids crossover distortion and maintains linearity across the full output range - critical for preserving signal fidelity when interfacing directly with 12-bit or higher ADCs in systems using the AD8629TRZ-EP-R7.
Is the AD8629TRZ-EP-R7 pin-compatible with standard SOIC-8 op-amps?
Yes, the AD8629TRZ-EP-R7 uses the industry-standard 8-lead narrow SOIC_N (R-8) package per JEDEC MS-012-AA, matching footprint and solder pad dimensions of generic SOIC-8 op-amps. However, its dual-channel configuration (two independent amplifiers) and enhanced temperature rating require verification of thermal and electrical constraints before drop-in replacement in legacy designs.
What is the typical input bias current of the AD8629TRZ-EP-R7 at 25°C?
The AD8629TRZ-EP-R7 specifies a maximum input bias current of 100 pA at 25°C, with typical value near 30 pA. This ultra-low IB enables high-impedance sensor interfaces - such as photodiode transimpedance amplifiers or piezoelectric charge amplifiers - without significant DC error or signal attenuation in the AD8629TRZ-EP-R7's input stage.
AD8629TRZ-EP-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 2.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 850µA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8629TRZ-EP-R7 FAQ
1.How can I place an order for AD8629TRZ-EP-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8629TRZ-EP-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD8629TRZ-EP-R7 reliable?
The price and inventory of AD8629TRZ-EP-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8629TRZ-EP-R7 is usually 5 days.
3.What payment methods are accepted for AD8629TRZ-EP-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8629TRZ-EP-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8629TRZ-EP-R7?
AD8629TRZ-EP-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8629TRZ-EP-R7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD8629TRZ-EP-R7?
For technical support, including AD8629TRZ-EP-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8629TRZ-EP-R7 requirements.
6.How does Aetrix verify that AD8629TRZ-EP-R7 is sourced from the original manufacturer or authorized distributors?
All AD8629TRZ-EP-R7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD8629TRZ-EP-R7 meets industry standards.
7.What is the process for return or replacement of AD8629TRZ-EP-R7?
All AD8629TRZ-EP-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8629TRZ-EP-R7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD8629TRZ-EP-R7 part is unused and in its original packaging.
Return procedure for AD8629TRZ-EP-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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