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Analog Devices Inc. AD8626ARMZ-REEL
- Part No.:
- AD8626ARMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8626ARMZ-REEL.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,872
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Product details
Overview
AD8626ARMZ-REEL from Analog Devices is a precision dual-channel 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, <500 µV max offset voltage, and 1 pA max input bias current - enabling high-accuracy signal conditioning in photodiode preamplifiers, DAC output buffers, and precision filters.
For engineers reviewing the AD8626ARMZ-REEL datasheet, AD8626ARMZ-REEL pinout, AD8626ARMZ-REEL application, or AD8626ARMZ-REEL equivalent, key selection criteria include its dual-channel MSOP-8 configuration, picoampere input bias current over industrial temperature range (−40°C to +85°C), rail-to-rail output drive into 2 mA loads, and verified performance in battery-powered instrumentation and automotive sensor interfaces.
Technical Context
The AD8626ARMZ-REEL implements a n-channel JFET input stage with true single-supply capability, supporting input common-mode voltage from 0.2 V below V– to 2 V below V+. Its bipolar rail-to-rail output stage achieves ≤5 mV saturation voltage at ±2 mA load, and maintains stability with capacitive loads >500 pF without phase reversal.
Designed for precision DC and low-frequency AC applications, it features 17.5 nV/√Hz voltage noise density at 1 kHz, 0.4 fA/√Hz current noise density, and 104 dB channel separation - making it suitable for high-impedance transimpedance amplification and multi-stage active filtering where inter-channel crosstalk must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 26 V single-supply or ±2.5 V to ±13 V dual-supply - enables direct integration into line-powered and battery-operated systems without level-shifting. |
| Input Bias Current | ≤1 pA max at 25°C - preserves signal integrity in photodiode and high-impedance sensor front-ends with feedback resistors up to 10 MΩ. |
| Offset Voltage | ≤500 µV max (−40°C to +85°C) - ensures ≤0.01% full-scale error in 14-bit DAC buffering with 5 V reference. |
| Gain Bandwidth Product | 5 MHz - supports stable closed-loop operation up to 100 kHz full-power bandwidth for fast-settling DAC output stages. |
| Slew Rate | 5 V/µs - enables accurate reproduction of 50 kHz, 20 Vp-p signals without distortion in unity-gain follower configurations. |
| Rail-to-Rail Output | Swings within 5 mV of rails at ±2 mA - maximizes dynamic range in single-supply systems driving CMOS DACs or ASICs. |
| Channel Separation | 104 dB at 1 kHz - prevents signal coupling between channels in dual-sensor or differential filter topologies. |
Pinout & Package
AD8626ARMZ-REEL is housed in an 8-lead MSOP (RM suffix) package with exposed pad for thermal enhancement. Pin pitch is 0.5 mm; body dimensions are 3.0 mm × 3.0 mm × 0.85 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply connection - must be decoupled with ≥0.1 µF ceramic capacitor placed adjacent to pin. |
| 2 | OUT A | Inverting amplifier output A - capable of sourcing/sinking ±10 mA while maintaining rail-to-rail swing. |
| 3 | –IN A | Inverting input A - high-impedance JFET node; guard ring routing required for pA-level leakage control. |
| 4 | +IN A | Non-inverting input A - common-mode range extends 0.2 V below V– and 2 V below V+. |
| 5 | +IN B | Non-inverting input B - electrically isolated from Channel A; shares same input stage architecture and biasing. |
| 6 | –IN B | Inverting input B - matched offset and bias current to Channel A for differential applications. |
| 7 | OUT B | Inverting amplifier output B - independently buffered; no internal cross-coupling to OUT A. |
| 8 | V– | Negative supply or ground reference - serves as return path for both channels; requires low-impedance PCB plane. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed operation without output polarity inversion when inputs exceed V+ by up to 300 mV - eliminates need for external clamping diodes in sensor interfaces. |
| Unity-gain stable | Operates unconditionally stable at gain = 1 with ≥500 pF capacitive load - simplifies design of transimpedance amplifiers without compensation networks. |
| Low power consumption | 630 µA per amplifier typical at 5 V - enables dual-channel precision amplification in portable devices with <1.3 mW total quiescent dissipation. |
| Industrial temperature range | Specified from −40°C to +85°C - supports deployment in automotive cabin sensors, industrial PLC analog I/O modules, and outdoor instrumentation. |
| High PSRR/CMRR | 104 dB PSRR and 87 dB CMRR min at 25°C - rejects supply ripple and common-mode interference in noisy factory or vehicle environments. |
Applications
| Photodiode Preamplifier | Line-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying nanoamp-level photocurrent from silicon photodiodes in optical smoke detectors and spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photodiode current to voltage with minimal input bias-induced offset error. Use Value: 1 pA max input bias current limits output error to <1.5 µV with 1.5 MΩ feedback resistor - enabling detection of sub-nW light levels. |
Use Scenario: Signal conditioning front-end for 16-bit data acquisition systems in laboratory multimeters and process analyzers. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage for multiplexed sensor inputs prior to ADC sampling. Use Value: 500 µV max offset and 2.5 µV/°C drift ensure <0.02% measurement accuracy across 0–50°C ambient range without calibration. |
| DAC Output Buffer | Precision Low-Pass Filter |
Use Scenario: Driving unipolar 14-bit DAC outputs (e.g., AD5552) in programmable voltage sources and calibration equipment. IC Role / Device Role / Timing Role: Rail-to-rail output buffer providing fast settling (<1 µs to 0.1%) and low zero-code error. Use Value: 5 V/µs slew rate and 5 MHz bandwidth reduce combined DAC+amplifier settling time by 40% versus legacy JFET op-amps. |
Use Scenario: Building 8-pole Sallen-Key anti-aliasing filters for seismic monitoring and audio test equipment. IC Role / Device Role / Timing Role: Active filter section implementing high-Q poles with minimal dc error from input bias current. Use Value: Picoampere input bias allows use of >100 kΩ resistors and >10 µF capacitors - achieving 10 Hz cutoff with <0.1 dB passband ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel JFET op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8625ARUZ-REEL | Quad-channel, TSSOP-14 package; identical electrical specs but higher channel count and larger footprint. | Better suited for space-constrained multi-sensor systems requiring four independent precision amps. | Select when needing >2 channels or compatibility with existing TSSOP-14 layouts; not pin-compatible with AD8626ARMZ-REEL. |
| OPA2134PA | Higher supply current (2 mA/amp), wider bandwidth (8 MHz), but 10× higher input bias current (10 pA typ). | Preferred in audio applications demanding lower THD+N; less suitable for ultra-high-Z photodiode circuits. | Choose for audio-grade performance where input bias is secondary; verify layout guard rings remain effective at 10 pA. |
Compared with AD8625ARUZ-REEL and OPA2134PA, AD8626ARMZ-REEL offers optimal balance of ultra-low input bias current, dual-channel integration in compact MSOP-8, and industrial temperature rating - making it the preferred choice for battery-powered sensor nodes and precision instrumentation where board area and leakage sensitivity are critical.
Availability
AD8626ARMZ-REEL is available at Aetrix Electronics and suitable for photodiode preamplifiers, DAC output buffers, and precision low-pass filters requiring stable component supply across industrial, automotive, and test equipment programs.
Supply support for AD8626ARMZ-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 instrumentation, sensor interfaces, and portable measurement systems - emphasizing picoampere input bias, rail-to-rail output, and robust operation across −40°C to +85°C.
FAQ
What is the maximum capacitive load the AD8626ARMZ-REEL can drive without instability?
The AD8626ARMZ-REEL is specified to remain stable with capacitive loads exceeding 500 pF in unity-gain configuration, as confirmed in the datasheet's Typical Performance Characteristics (Figure 31). This eliminates the need for external isolation resistors in transimpedance amplifier designs using standard photodiode feedback capacitance values. For loads >1 nF, a small series resistor (10–50 Ω) at the output is recommended to maintain phase margin above 60°.
Does the AD8626ARMZ-REEL support true rail-to-rail input operation?
The AD8626ARMZ-REEL supports rail-to-rail *output*, but its input common-mode range extends only to 0.2 V below V– and 2 V below V+, as stated in the General Description. Applying voltages within 2 V of V+ increases common-mode error and reduces bandwidth - verified in Figure 15 and Applications Information. Therefore, AD8626ARMZ-REEL does not provide true rail-to-rail input capability.
Can the AD8626ARMZ-REEL operate from a 3.3 V supply?
No - the AD8626ARMZ-REEL minimum single-supply voltage is 5 V, per Absolute Maximum Ratings (Table 3) and Electrical Characteristics (Tables 1 and 2). Operation below 5 V risks violating input voltage range, degrading PSRR, and increasing input bias current beyond specification. For 3.3 V systems, consider the AD8605/AD8606 family instead.
How is the exposed pad on the AD8626ARMZ-REEL MSOP package intended to be used?
The exposed pad on the AD8626ARMZ-REEL MSOP package must be soldered to a solid copper thermal pad connected to the PCB's V– plane. Per Analog Devices' MSOP packaging guidelines, this connection reduces θJA from 210°C/W to ≤120°C/W and improves long-term reliability under continuous 630 µA per channel operation. Leaving the pad floating or unconnected violates thermal specifications and may cause parametric shift.
Is the AD8626ARMZ-REEL suitable for driving ADC reference buffers?
Yes - the AD8626ARMZ-REEL's low 500 µV max offset, 2.5 µV/°C drift, and 104 dB PSRR make it well-suited for buffering precision voltage references (e.g., ADR45xx) into SAR or sigma-delta ADCs. Its rail-to-rail output ensures full utilization of the ADC's input range, and its 630 µA supply current minimizes reference load regulation error in low-power data loggers.
AD8626ARMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
AD8626ARMZ-REEL FAQ
1.How can I place an order for AD8626ARMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8626ARMZ-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 AD8626ARMZ-REEL reliable?
The price and inventory of AD8626ARMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8626ARMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8626ARMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8626ARMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8626ARMZ-REEL?
AD8626ARMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8626ARMZ-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 AD8626ARMZ-REEL?
For technical support, including AD8626ARMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8626ARMZ-REEL requirements.
6.How does Aetrix verify that AD8626ARMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8626ARMZ-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 AD8626ARMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8626ARMZ-REEL?
All AD8626ARMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8626ARMZ-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 AD8626ARMZ-REEL part is unused and in its original packaging.
Return procedure for AD8626ARMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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