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Analog Devices Inc. AD8626ARMZ-R2
- Part No.:
- AD8626ARMZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8626ARMZ-R2.pdf
- Description:
- IC OPAMP JFET 5MHZ DUAL LP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,776
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Product details
Overview
AD8626ARMZ-R2 from Analog Devices is a dual-channel, precision JFET-input operational amplifier in 8-lead MSOP package, featuring rail-to-rail output, 1 pA max input bias current, 5 MHz gain bandwidth, and 500 µV max offset voltage at 25°C. It operates from single supplies (5 V to 26 V) or dual supplies (±2.5 V to ±13 V), enabling use in photodiode transimpedance amplifiers, battery-powered instrumentation, and precision DAC output buffers.
For engineers reviewing the AD8626ARMZ-R2 datasheet, AD8626ARMZ-R2 pinout, AD8626ARMZ-R2 application, or AD8626ARMZ-R2 equivalent, key selection criteria include ultra-low IB for high-impedance sensor interfaces, rail-to-rail output swing under load, low 630 µA/amp supply current, and guaranteed −40°C to +85°C industrial temperature operation without phase reversal.
Technical Context
The AD8626ARMZ-R2 employs an n-channel JFET input stage delivering true single-supply capability with input common-mode range extending 0.2 V below V− and up to 2 V below V+, and a unique bipolar rail-to-rail output stage that maintains ≤5 mV dropout at 2 mA load. Its unity-gain-stable architecture supports capacitive loads >500 pF without oscillation.
It achieves 17.5 nV/√Hz voltage noise density at 1 kHz and 0.4 fA/√Hz current noise density, making it suitable for low-noise, high-source-impedance applications such as photodiode preamplification and precision filtering where input current-induced errors must remain sub-microvolt.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA max at 25°C - enables stable DC gain in GΩ-range feedback networks for photodiode and electrometer circuits |
| Offset Voltage | 500 µV max at 25°C - ensures <0.01% full-scale error in 5 V-span 14-bit DAC buffering applications |
| Gain Bandwidth Product | 5 MHz - supports accurate closed-loop gain up to 100× at 50 kHz, sufficient for fast-settling DAC output stages |
| Rail-to-Rail Output Swing | Within 5 mV of rails at 2 mA load - maximizes dynamic range in single-supply systems with 5 V or 3.3 V logic compatibility |
| Supply Current per Amplifier | 630 µA typ - allows dual-channel precision amplification in portable, line-powered, or automotive sensor nodes with <1.3 mW total dissipation at 5 V |
| Common-Mode Rejection Ratio | 87 dB min at 25°C - rejects power supply ripple and ground bounce in noisy industrial environments |
| Operating Temperature Range | −40°C to +85°C - qualified for automotive cabin sensors, industrial controls, and outdoor instrumentation without derating |
Pinout & Package
AD8626ARMZ-R2 is housed in an 8-lead MSOP (RM suffix) package with exposed pad for thermal enhancement (θJA = 210°C/W). Pin assignments are defined per Figure 1 in Rev. F datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Positive Supply | Accepts 5 V to 26 V single supply or +2.5 V to +13 V dual supply; decoupling capacitor required near pin |
| 2 - OUT A | Amplifier A Output | Rail-to-rail capable; drives ≥10 kΩ load while maintaining <1% gain error and no phase reversal |
| 3 - –IN A | Inverting Input A | High-impedance JFET node; sensitive to PCB leakage-requires guard ring and clean layout |
| 4 - +IN A | Noninverting Input A | Same ultra-low IB as –IN A; common-mode range extends to 0.2 V below V− |
| 5 - –IN B | Inverting Input B | Independent channel; shares same input specs and noise performance as Channel A |
| 6 - +IN B | Noninverting Input B | Enables dual-channel signal conditioning without crosstalk (channel separation >104 dB at 1 kHz) |
| 7 - OUT B | Amplifier B Output | Matches OUT A performance; supports independent gain stages or differential output configurations |
| 8 - V− | Negative Supply / Ground | Connects to system ground in single-supply mode; supports true dual-supply operation down to −13 V |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed even when inputs exceed V+ by up to 300 mV-eliminates need for external clamping diodes in overvoltage-prone sensor front-ends |
| Capacitive load drive | Stable with >500 pF output capacitance-enables direct driving of ADC input filters or long cables without external isolation resistors |
| Low 1/f noise | 1.9 µV p-p (0.1–10 Hz)-critical for precision DC-coupled measurements in weigh scales and medical biosensors |
| Input voltage range | Extends 0.2 V below V− and to 2 V below V+-supports level-shifting and single-supply interfacing to CMOS ASICs and DACs |
| Unity-gain stability | Operates stably at gain = 1 without compensation-reduces component count in buffer and follower configurations |
Applications
| Photodiode Transimpedance Amplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Converting weak photocurrent (pA–nA) from low-light photodiodes into precise voltage signals for optical smoke detectors or spectrophotometers. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with ultra-low IB and VOS, configured in inverting mode with MΩ-range feedback resistor. Use Value: Enables >95 dB SNR at 30 kHz bandwidth while holding output error below 1 µV due to IB × Rf and VOS contributions. | Use Scenario: Signal conditioning and reference buffering in handheld multimeters, portable gas analyzers, and field-deployable environmental sensors. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail I/O op amp used for sensor front-end amplification and DAC output buffering in 3.3 V/5 V battery-operated systems. Use Value: Delivers full-scale output swing and <0.01% linearity error while consuming only 1.26 mA total supply current-extending battery life beyond 1000 hours on two AA cells. |
| Precision DAC Output Buffer | Industrial Sensor Signal Conditioning |
Use Scenario: Driving high-resolution (14–16 bit) unipolar/bipolar DAC outputs (e.g., AD5552, AD5544) in programmable logic controllers and calibration equipment. IC Role / Device Role / Timing Role: Low-offset, low-noise unity-gain buffer placed directly at DAC output to preserve resolution and minimize code-dependent gain error. Use Value: Reduces zero-code error contribution to <0.5 LSB by limiting IB-induced offset (1 pA × 10 kΩ = 10 nV) and supporting fast settling (<1 µs to 0.1%) via 5 MHz GBP. | Use Scenario: Amplifying low-level signals from RTDs, strain gauges, and automotive pressure sensors in engine control units and factory automation I/O modules. IC Role / Device Role / Timing Role: Dual-channel precision op amp implementing programmable gain, filtering, and level-shifting before ADC sampling. Use Value: Maintains <2.5 µV/°C offset drift across −40°C to +85°C, ensuring <0.1% full-scale error stability without recalibration in harsh thermal environments. |
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 |
|---|---|---|---|
| AD8625ARUZ | 14-lead TSSOP; quad-channel; identical electrical specs but higher channel count and larger footprint | Suitable for space-constrained multi-sensor nodes requiring four matched amplifiers instead of two | Select AD8625ARUZ when board area permits and quad-channel integration reduces BOM count and inter-channel matching is critical |
| OPA211IDGKT | Lower 1.1 nV/√Hz voltage noise; higher 3.6 mA supply current; bipolar input (not JFET); 0.1 µV/°C drift | Better for ultra-low-noise AC-coupled audio or RF IF stages; unsuitable for pA-level photodiode inputs due to 20 nA IB | Choose OPA211IDGKT only for low-noise, low-drift applications where input bias current >10 nA is acceptable and supply current budget allows |
Compared with AD8625ARUZ, AD8626ARMZ-R2 offers optimal channel density and MSOP footprint for dual-channel precision tasks; versus OPA211IDGKT, it trades higher voltage noise for 10,000× lower input bias current-making it irreplaceable in high-impedance DC-coupled sensing.
Availability
AD8626ARMZ-R2 is available at Aetrix Electronics and suitable for photodiode amplifiers, battery-powered instrumentation, and precision DAC output buffering requiring stable component supply across industrial, automotive, and test equipment design cycles.
Supply support for AD8626ARMZ-R2 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 high-impedance sensor interfaces-including photodiodes, RTDs, and piezoelectric elements-where picoamp input bias and rail-to-rail output are mandatory.
FAQ
What is the maximum input voltage range for AD8626ARMZ-R2 when operating from a 5 V single supply?
The AD8626ARMZ-R2 supports an input common-mode voltage range from 0 V (0.2 V below V−, which is ground) to 3 V (2 V below V+, i.e., 5 V). Exceeding 3 V at either input risks increased common-mode error and bandwidth reduction, as documented in Figure 15 of the Rev. F datasheet. Operation remains safe up to V+ + 0.3 V, but sustained overvoltage >300 mV requires series input protection.
Does AD8626ARMZ-R2 require external compensation for unity-gain stability?
No, AD8626ARMZ-R2 is internally compensated for unity-gain stability. It drives capacitive loads up to 500 pF without oscillation and maintains ≥60° phase margin across its full operating range. No external compensation components are needed in follower, inverting, or noninverting configurations at gains ≥1, simplifying layout and reducing BOM cost.
Can AD8626ARMZ-R2 be used in dual-supply ±5 V systems?
Yes, AD8626ARMZ-R2 is fully specified for dual-supply operation from ±2.5 V to ±13 V. At ±5 V, it delivers 104 dB PSRR, 105 dB CMRR, ±15 mA output current, and rail-to-rail output swing from −4.92 V to +4.92 V at 2 mA load. All key parameters-including offset voltage (0.75 mV typ), noise (16 nV/√Hz), and GBW (5 MHz)-are maintained per Table 2 in the Rev. F datasheet.
How does AD8626ARMZ-R2 handle input overvoltage conditions?
AD8626ARMZ-R2 tolerates input voltages up to 300 mV above V+ without damage or phase reversal. For sustained overvoltage >300 mV, a 10 kΩ series resistor on the noninverting input limits current and prevents junction damage. The device also withstands inputs 15 V below V− if the total voltage between V+ and the input remains <26 V-enabling robust interfacing to industrial field transmitters.
Is AD8626ARMZ-R2 pin-compatible with other AD862x variants like AD8627?
No, AD8626ARMZ-R2 (8-lead MSOP) is not pin-compatible with AD8627 (5-lead SC70 or 8-lead SOIC). Pinouts differ significantly: AD8626ARMZ-R2 has dedicated V+, V−, two outputs, and four inputs in MSOP layout, while AD8627's 5-lead SC70 omits one input/output pair and uses NC pins. PCB redesign is required when substituting between AD8626ARMZ-R2 and AD8627.
AD8626ARMZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- 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-MSOP
AD8626ARMZ-R2 FAQ
1.How can I place an order for AD8626ARMZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8626ARMZ-R2 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 AD8626ARMZ-R2 reliable?
The price and inventory of AD8626ARMZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8626ARMZ-R2 is usually 5 days.
3.What payment methods are accepted for AD8626ARMZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8626ARMZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8626ARMZ-R2?
AD8626ARMZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8626ARMZ-R2 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 AD8626ARMZ-R2?
For technical support, including AD8626ARMZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8626ARMZ-R2 requirements.
6.How does Aetrix verify that AD8626ARMZ-R2 is sourced from the original manufacturer or authorized distributors?
All AD8626ARMZ-R2 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 AD8626ARMZ-R2 meets industry standards.
7.What is the process for return or replacement of AD8626ARMZ-R2?
All AD8626ARMZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with AD8626ARMZ-R2, 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 AD8626ARMZ-R2 part is unused and in its original packaging.
Return procedure for AD8626ARMZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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