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Analog Devices Inc. AD8626ARZ-REEL
- Part No.:
- AD8626ARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8626ARZ-REEL.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,045
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Product details
Overview
AD8626ARZ-REEL from Analog Devices is a dual-channel, precision JFET-input operational amplifier optimized for low-power, single-supply operation (5 V to 26 V) and rail-to-rail output swing. It delivers 5 MHz gain bandwidth, 5 V/µs slew rate, and ultra-low input bias current (≤1 pA), enabling high-accuracy photodiode transimpedance amplification and precision DAC buffering in battery-powered instrumentation.
For engineers reviewing the AD8626ARZ-REEL datasheet, AD8626ARZ-REEL pinout, AD8626ARZ-REEL application, or AD8626ARZ-REEL equivalent, key selection criteria include input bias current stability over temperature, rail-to-rail output drive into capacitive loads >500 pF, offset voltage drift ≤2.5 µV/°C, and guaranteed operation across −40°C to +85°C industrial range.
Technical Context
The AD8626ARZ-REEL employs n-channel JFET input stage for ultra-low IB and high input impedance (>1012 Ω), with bipolar rail-to-rail output stage delivering <5 mV dropout at ±2 mA load. Its unity-gain stable architecture supports capacitive loads up to 500 pF without external compensation.
It features true single-supply capability with input common-mode range extending 0.2 V below V− and 2 V below V+, no phase reversal near supply rails, and CMRR ≥87 dB (typ) at 25°C - critical for precision signal conditioning in automotive sensors and ATE reference drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | ≤1 pA max at 25°C; enables accurate photodiode preamplification with >1 MΩ feedback resistors without significant DC error. |
| Offset Voltage | ≤0.5 mV max at 25°C; ensures ≤0.01% full-scale error in 14-bit DAC output stages referenced to 5 V. |
| Gain Bandwidth | 5 MHz; supports stable closed-loop operation at G = +10 up to ~500 kHz, suitable for anti-aliasing and precision filter design. |
| Slew Rate | 5 V/µs; allows full-scale settling of 4-V output steps in <1 µs, meeting timing requirements of fast DACs like AD5552. |
| Supply Current | 630 µA per amplifier typ at 5 V; enables dual-channel precision amplification in line- or battery-powered systems with <1.3 mA total quiescent draw. |
| Rail-to-Rail Output | Swings within 75 mV of rails at ±2 mA load; preserves dynamic range in single-supply 5 V systems driving ASICs or CMOS DACs. |
| Input Voltage Range | 0 V to 3 V at 5 V supply; accepts signals down to ground while maintaining low input error, critical for sensor front-ends. |
Pinout & Package
AD8626ARZ-REEL is housed in an 8-lead SOIC (R-8) package with standard pinout and surface-mount compatibility. Thermal resistance θJA = 158°C/W supports reliable operation in compact PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply terminal; accepts 5 V to 26 V single supply or ±2.5 V to ±13 V dual supply. |
| 2 | −IN A | Inverting input of Amplifier A; high-impedance node requiring guarded layout for pA-level signal integrity. |
| 3 | +IN A | Non-inverting input of Amplifier A; common-mode range extends 0.2 V below V− and 2 V below V+. |
| 4 | V− | Negative supply terminal; tied to ground in single-supply configurations. |
| 5 | OUT A | Amplifier A output; rail-to-rail capable, drives loads ≥1 kΩ with <5 mV dropout at ±2 mA. |
| 6 | OUT B | Amplifier B output; independent channel with identical performance to OUT A. |
| 7 | +IN B | Non-inverting input of Amplifier B; electrically isolated from Channel A for dual-sensor or differential pair use. |
| 8 | −IN B | Inverting input of Amplifier B; matched offset and bias current to Channel A for precision differential applications. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed operation without output polarity inversion when inputs exceed V+ by up to 300 mV - eliminates latch-up risk in sensor overvoltage events. |
| Capacitive load drive | Stable with >500 pF load capacitance; avoids need for isolation resistors in ADC driver or filter applications. |
| Low 0.1–10 Hz noise | 1.9 µV p-p; minimizes baseline drift in precision DC-coupled instrumentation such as strain gauge or thermopile amplifiers. |
| High channel separation | 104 dB at 1 kHz; prevents crosstalk between dual channels in simultaneous sampling or dual-sensor signal chains. |
| Industrial temp range | Specified from −40°C to +85°C; ensures consistent offset drift (≤2.5 µV/°C) and bias current stability in automotive and industrial control environments. |
Applications
| Photodiode Preamplifier | ATE Reference Level Driver |
|---|---|
Use Scenario: Low-light optical detection using reverse-biased silicon photodiode with 100 MΩ shunt resistance and 1.5 MΩ transimpedance feedback. IC Role / Device Role / Timing Role: Precision transimpedance amplifier converting photocurrent to voltage with minimal input error. Use Value: 1 pA input bias contributes <1.5 µV output error; 0.5 mV offset adds <0.75 mV error - enabling sub-100 nW light power resolution. |
Use Scenario: Driving reference voltage outputs of automated test equipment (ATE) with 14-bit DACs requiring <300 µV zero-code accuracy. IC Role / Device Role / Timing Role: Output buffer and current-to-voltage converter for unipolar DACs operating on 5 V single supply. Use Value: Rail-to-rail output swing preserves full 0–5 V DAC range; 5 V/µs slew rate ensures <1 µs settling for 16 MS/s waveform generation. |
| Battery-Powered Instrumentation | Precision Sallen-Key Filter |
Use Scenario: Portable pH meter or handheld multimeter with microcontroller-based signal chain powered by two AA cells (3 V nominal). IC Role / Device Role / Timing Role: Signal conditioner and gain stage preceding 12-bit SAR ADC. Use Value: 630 µA per channel enables dual-amplifier front-end with <1.3 mA total supply current; 5 V/µs slew supports 10 kHz AC coupling without distortion. |
Use Scenario: 10 Hz, 8-pole low-pass filter for seismic sensor data acquisition requiring ultra-low noise and DC stability. IC Role / Device Role / Timing Role: Active filter section amplifier with high-Z input minimizing source loading. Use Value: pA-level input bias permits use of >100 kΩ resistors without DC drift; 16 nV/√Hz noise density maintains SNR >95 dB at 30 kHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision JFET op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134PA | Higher supply current (800 µA/amp), wider GBW (8 MHz), but higher input bias (10 pA typ) and no guaranteed 1 pA max spec. | Less suitable for ultra-high-Z photodiode or electrometer circuits where pA-level leakage dominates error budget. | Select AD8626ARZ-REEL when input bias current ≤1 pA and 5 V/µs slew at low quiescent power are mandatory. |
| LT1782CS8#PBF | Lower offset (125 µV max), lower noise (11 nV/√Hz), but limited supply range (2.7–10 V) and no specified operation above +85°C. | Not qualified for automotive or extended industrial temperature applications requiring −40°C to +85°C operation. | Select AD8626ARZ-REEL when wide supply range (5–26 V), guaranteed industrial temp grade, and rail-to-rail output are required. |
Compared with OPA2134PA and LT1782CS8#PBF, AD8626ARZ-REEL uniquely balances ultra-low input bias (≤1 pA), rail-to-rail output in wide supply range, and full industrial temperature specification - making it the only choice for battery-powered photodiode systems requiring long-term DC stability and low-power operation.
Availability
AD8626ARZ-REEL is available at Aetrix Electronics and suitable for photodiode preamplification, ATE reference level driving, and battery-powered instrumentation requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for AD8626ARZ-REEL 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 AD862x family was designed specifically for precision, low-power, single-supply signal conditioning in photodiode interfaces, DAC output buffering, and portable instrumentation - emphasizing pA-level input bias, rail-to-rail output, and industrial temperature reliability.
FAQ
What is the maximum capacitive load the AD8626ARZ-REEL can drive without instability?
The AD8626ARZ-REEL is specified to remain stable with capacitive loads exceeding 500 pF, as confirmed in the datasheet's Typical Performance Characteristics (Figure 31). This eliminates the need for series isolation resistors in ADC driver or filter applications, preserving signal integrity and simplifying layout. For loads >500 pF, small series resistance (<10 Ω) at the output may be added to ensure phase margin remains >60°.
Does the AD8626ARZ-REEL support true rail-to-rail input operation?
The AD8626ARZ-REEL does not support rail-to-rail input - its input common-mode voltage range extends from 0.2 V below V− to 2 V below V+ at 5 V supply. This allows inputs down to ground but limits operation within 2 V of the positive rail. Exceeding this range increases common-mode error and reduces bandwidth, as shown in Figure 15 of the datasheet.
Can the AD8626ARZ-REEL operate from a 3.3 V supply?
No - the AD8626ARZ-REEL has a minimum single-supply rating of 5 V, per Absolute Maximum Ratings (Table 3). Operation below 5 V risks undefined behavior, reduced output swing, and failure to meet guaranteed specifications including offset voltage and slew rate. For 3.3 V systems, consider the AD8605/AD8606 family instead.
How does the AD8626ARZ-REEL handle input overvoltage conditions?
The AD8626ARZ-REEL tolerates input voltages up to 15 V below V− if the total voltage between V+ and the input is <26 V. However, inputs exceeding V+ by >300 mV for >10 seconds may cause permanent damage. A 10 kΩ series resistor on the noninverting input protects against such overvoltage while adding negligible noise - a recommended practice per Applications Information section.
Is the AD8626ARZ-REEL pin-compatible with other AD862x variants?
Yes - the AD8626ARZ-REEL (8-lead SOIC) shares identical pinout with AD8626 in MSOP (RM suffix) and matches the SOIC pin configuration of AD8625/AD8627 in R-8 packages. Pin functions are fully aligned across all AD862x dual-channel variants, enabling drop-in replacement where package footprint allows.
AD8626ARZ-REEL 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:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.25 pA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 710µA (x2 Channels)
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 26 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8626ARZ-REEL FAQ
1.How can I place an order for AD8626ARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8626ARZ-REEL 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 AD8626ARZ-REEL reliable?
The price and inventory of AD8626ARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8626ARZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8626ARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8626ARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8626ARZ-REEL?
AD8626ARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8626ARZ-REEL 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 AD8626ARZ-REEL?
For technical support, including AD8626ARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8626ARZ-REEL requirements.
6.How does Aetrix verify that AD8626ARZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8626ARZ-REEL 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 AD8626ARZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8626ARZ-REEL?
All AD8626ARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8626ARZ-REEL, 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 AD8626ARZ-REEL part is unused and in its original packaging.
Return procedure for AD8626ARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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