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Analog Devices Inc. AD8626ARMZ
- Part No.:
- AD8626ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8626ARMZ.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,919
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Product details
Overview
AD8626ARMZ 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, <1 pA input bias current, 500 µV max offset voltage, and operates across −40°C to +85°C. It is used in photodiode transimpedance amplifiers, battery-powered instrumentation, and precision DAC output buffers.
For engineers reviewing the AD8626ARMZ datasheet, AD8626ARMZ pinout, AD8626ARMZ application, or AD8626ARMZ equivalent, key selection criteria include input bias current stability at high source impedance, rail-to-rail output headroom under load, offset drift over temperature, and unity-gain stability with capacitive loads up to 500 pF.
Technical Context
The AD8626ARMZ employs an n-channel JFET input stage enabling true single-supply operation with input common-mode range extending 0.2 V below V− and up to 2 V below V+. Its bipolar rail-to-rail output stage achieves ≤5 mV saturation voltage at ±2 mA load, supporting wide dynamic range in unipolar systems.
It features unity-gain stability, no phase reversal near supply rails, and maintains low noise (17.5 nV/√Hz @ 1 kHz) and high CMRR (87 dB typ) across its full operating voltage and temperature range. Channel separation exceeds 104 dB at 1 kHz, confirming robust dual-amplifier isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA max at 25°C - enables accurate signal conditioning with >1 GΩ source impedances without significant DC error. |
| Offset Voltage | 500 µV max - ensures ≤0.01% full-scale error in 5 V-range 14-bit DAC buffering applications. |
| Gain Bandwidth Product | 5 MHz - supports stable closed-loop operation up to 100 kHz full-power bandwidth with 20 VPP signals. |
| Slew Rate | 5 V/µs - allows fast settling of DAC outputs and preserves fidelity in audio and sensor signal chains. |
| Rail-to-Rail Output | Swings within 5 mV of rails at ±2 mA - maximizes usable dynamic range in 5 V single-supply systems. |
| Supply Current per Amp | 630 µA typ - enables dual-channel precision amplification in battery-powered devices with <1.3 mA total quiescent draw. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive sensor signal conditioning environments. |
Pinout & Package
AD8626ARMZ is housed in an 8-lead MSOP (RM suffix) package with exposed pad for thermal enhancement. Pin 1 is marked by a dot; pin count follows standard MSOP numbering (1–8, top view).
| Pin/Terminal | 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 | OUT A | Amplifier A output - rail-to-rail capable; drives loads ≥600 Ω while maintaining specified AC performance. |
| 3 | OUT B | Amplifier B output - electrically isolated from OUT A; supports independent dual-channel signal paths. |
| 4 | –IN A | Inverting input of Amplifier A - high-impedance JFET node; requires guarding for picoamp-level accuracy. |
| 5 | –IN B | Inverting input of Amplifier B - matched to –IN A for common-mode rejection in differential configurations. |
| 6 | +IN A | Noninverting input of Amplifier A - extends 0.2 V below V−, enabling ground-referenced input in single-supply use. |
| 7 | +IN B | Noninverting input of Amplifier B - identical voltage range and bias characteristics as +IN A. |
| 8 | V− | Negative supply terminal - tied to ground in single-supply mode; supports negative rail down to −13 V in dual mode. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed operation without output polarity inversion when inputs exceed V+ or approach V−, critical for sensor front-ends. |
| Capacitive load drive | Stable with >500 pF output capacitance - eliminates 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 photodiode and strain gauge amplifiers. |
| High channel separation | 104 dB @ 1 kHz - prevents crosstalk between channels in dual-sensor or stereo audio signal paths. |
| Input voltage range | Extends 0.2 V below V− - allows direct interfacing to grounded sensors without level-shifting circuitry. |
Applications
| Photodiode Transimpedance Amplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Converting weak photocurrents (pA–nA) from low-light photodiodes into precise voltage outputs. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with ultra-low IB and VOS to minimize dark-current-induced offset and Johnson noise. Use Value: Enables 95 dB SNR at 30 kHz bandwidth using 1.5 MΩ feedback resistor, eliminating manual offset trimming. |
Use Scenario: Signal conditioning and analog front-end buffering in portable multimeters, gas sensors, and handheld data loggers. IC Role / Device Role / Timing Role: Dual-channel precision buffer and gain stage operating from single 5 V Li-ion supply. Use Value: Delivers rail-to-rail output swing and <1.3 mA total supply current, extending battery life while preserving 14-bit measurement accuracy. |
| DAC Output Buffer | Precision Active Filters |
Use Scenario: Driving unipolar and 4-quadrant multiplying DACs (e.g., AD5544, AD5552) requiring low-offset, high-Z input and fast settling. IC Role / Device Role / Timing Role: Output current-to-voltage converter and gain stage with 5 V/µs slew rate and 5 MHz bandwidth. Use Value: Reduces DAC effective settling time; eliminates zero-code error from IB × ROUT mismatch in 14-bit systems (LSB = 300 µV). |
Use Scenario: Constructing low-frequency, high-order active filters (e.g., 8-pole Sallen-Key) for ECG, seismic, or spectral analysis. IC Role / Device Role / Timing Role: Precision op-amp stage in multi-pole filter topology leveraging picoamp IB to enable MΩ-range resistors. Use Value: Achieves 10 Hz cutoff with minimal resistor-induced thermal noise and no Q-peaking due to low IB-induced DC errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel JFET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8625ARUZ | 14-lead TSSOP; quad-channel; same electrical specs but higher channel count and larger footprint. | Preferred where four matched amplifiers are needed (e.g., multi-sensor arrays), not dual-channel space-constrained designs. | Select AD8625ARUZ only if quad functionality and PCB area permit; AD8626ARMZ offers superior density for dual-channel needs. |
| OPA2134PA | Higher supply current (2 mA/amp); wider GBW (8 MHz); higher input bias (±10 pA); SO-8 package. | Better suited for audio line drivers requiring lower THD+N; less optimal for ultra-low-IB photodiode or high-Z sensor apps. | Choose OPA2134PA when bandwidth and audio fidelity outweigh ultra-low input current requirements. |
Compared with AD8625ARUZ and OPA2134PA, AD8626ARMZ uniquely balances ultra-low input bias current (≤1 pA), rail-to-rail output, and compact MSOP packaging-making it the optimal choice for space-constrained, high-impedance, single-supply precision systems where leakage-induced error must be minimized.
Availability
AD8626ARMZ is available at Aetrix Electronics and suitable for photodiode amplifiers, battery-powered instrumentation, and precision DAC output buffering requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD8626ARMZ 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 industrial, medical, and test equipment-emphasizing JFET input integrity, rail-to-rail output, and robustness across temperature and supply variations.
FAQ
What is the maximum capacitive load the AD8626ARMZ can drive while remaining stable?
The AD8626ARMZ is specified to remain unity-gain stable with capacitive loads exceeding 500 pF. This capability eliminates the need for external isolation resistors in applications such as ADC input drivers, active filter outputs, and cable-driven interfaces-reducing component count and preserving signal integrity without compromising phase margin.
Does the AD8626ARMZ support true single-supply operation with input signals below ground?
Yes, the AD8626ARMZ supports true single-supply operation with its input common-mode voltage range extending 0.2 V below V−. When V− is grounded, this allows inputs down to −0.2 V, enabling direct interface with slightly negative sensor outputs or AC-coupled signals without level-shifting circuitry-critical for grounded photodiode or bridge sensor configurations.
What is the typical supply current consumption of the AD8626ARMZ at 5 V supply?
The AD8626ARMZ draws 630 µA per amplifier at 5 V supply and 25°C, resulting in 1.26 mA total for both channels. This low quiescent current makes it ideal for battery-powered instrumentation, portable medical devices, and energy-harvesting sensor nodes where extended operational life is essential.
Can the AD8626ARMZ be used in 4-quadrant multiplying DAC applications?
Yes, the AD8626ARMZ is explicitly referenced in Analog Devices' application circuits (e.g., Figure 47) for 4-quadrant multiplying DACs like the AD5544. Its rail-to-rail output, low offset, and dual-channel architecture allow one amplifier to provide gain while the other adds a 10 V reference offset-enabling full ±10 V output swing from a bipolar ±13 V supply.
How does the AD8626ARMZ prevent phase reversal near the positive supply rail?
The AD8626ARMZ incorporates internal design features that eliminate phase reversal when input voltages approach or slightly exceed V+. Unlike many JFET op amps, it maintains correct polarity even with inputs up to V+ + 300 mV-verified in Figure 29 of the datasheet-making it reliable in sensor front-ends where transient overvoltage or rail-sticking conditions may occur.
AD8626ARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for AD8626ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8626ARMZ 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 reliable?
The price and inventory of AD8626ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8626ARMZ is usually 5 days.
3.What payment methods are accepted for AD8626ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8626ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8626ARMZ?
AD8626ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8626ARMZ 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?
For technical support, including AD8626ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8626ARMZ requirements.
6.How does Aetrix verify that AD8626ARMZ is sourced from the original manufacturer or authorized distributors?
All AD8626ARMZ 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 meets industry standards.
7.What is the process for return or replacement of AD8626ARMZ?
All AD8626ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8626ARMZ, 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 part is unused and in its original packaging.
Return procedure for AD8626ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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