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Analog Devices Inc. AD626ANZ
- Part No.:
- AD626ANZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD626ANZ.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:324
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Product details
Overview
AD626ANZ from Analog Devices is a precision single-supply differential amplifier optimized for amplifying low-level differential signals (e.g., 100 mV) superimposed on large common-mode voltages up to +26.5 V (single supply, +5 V), with pin-selectable gains of 10 or 100, 90 dB typical CMRR at 100 Hz, and 24 µs settling time to 0.01%. It is used in current sensing and bridge transducer interfaces where high common-mode rejection and rail-to-rail output swing are required.
For engineers reviewing the AD626ANZ datasheet, AD626ANZ pinout, AD626ANZ application, or AD626ANZ equivalent, this page delivers verified technical context, exact gain configuration behavior, real-world input common-mode range limits, confirmed SOIC-8/N-8 package mapping, and validated alternative options for industrial signal conditioning designs.
Technical Context
The AD626ANZ integrates a laser-trimmed resistive attenuator, low-drift preamplifier (A1), and output buffer (A2) to achieve precise differential gain while rejecting common-mode voltages up to six times (VS – 1 V). Its input stage uses 200 kΩ series resistors with integrated RFI filters and supports continuous 50 V input overload protection.
Gain is set by internal feedback networks: Pin 7 open = G = 10; Pin 7 grounded = G = 100. A single-pole low-pass filter is implemented via external capacitor on Pin 4 (FILTER), with corner frequency fC = 1/(2π × 100 kΩ × CF). Output swing reaches +4.7 V / –0.03 V (single +5 V supply) with 10 kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | Pin-selectable: G = 10 (Pin 7 open) or G = 100 (Pin 7 to AGND); enables rapid hardware configuration without external resistors. |
| Input Common-Mode Range | +26.5 V max (G = 10, +5 V supply); allows direct interface to high-side current shunts or industrial sensor bridges without level-shifting. |
| CMRR | 90 dB typical at 100 Hz; ensures <0.3% error when amplifying 100 mV ΔV across +24 V CMV. |
| Output Voltage Swing | +0.03 V to +4.7 V (RL = 10 kΩ, +5 V supply); supports ADC input ranges down to 30 mV offset and up to 4.7 V full-scale. |
| Settling Time | 24 µs to 0.01% (1 V step); meets requirements for 20 kHz sampling of transient current events. |
| Supply Range | +2.4 V to +10 V single supply; compatible with standard 3.3 V, 5 V, and 9 V industrial rails without dual-supply generation. |
| Quiescent Current | 0.20 mA max (G = 10, +5 V); enables battery-powered or energy-constrained monitoring nodes. |
Pinout & Package
AD626ANZ is supplied in an 8-lead plastic mini-DIP (N-8) package with 0.300-inch width, compliant with JEDEC MO-095AA. Pin spacing is 0.100 inch (2.54 mm), and lead finish is matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN) | Inverting Input | Differential input node; 200 kΩ series resistance provides RFI filtering and overload protection. |
| 2 (ANALOG GND) | Analog Reference | Ground reference for internal attenuator and preamp; must be low-impedance to maintain CMRR. |
| 3 (–VS) | Negative Supply | Connected to ground in single-supply operation; enables true 0 V input common-mode capability. |
| 4 (FILTER) | Low-Pass Filter Node | Connect external capacitor to AGND to implement configurable single-pole anti-aliasing filter. |
| 5 (+IN) | Non-Inverting Input | Differential input node; matched 200 kΩ series resistance ensures balanced input impedance. |
| 6 (G = 100) | Gain Selection | Grounding enables G = 100; open-circuit configures G = 10 - no external components needed. |
| 7 (OUT) | Amplified Output | Buffered output capable of driving 10 kΩ loads to +4.7 V / –0.03 V; stable with ≤50 pF capacitive load (G = 10). |
| 8 (+VS) | Positive Supply | Accepts +2.4 V to +10 V; powers all internal stages including laser-trimmed resistor network. |
Key Features
| Feature | Design Value |
|---|---|
| True single-supply operation | Operates from +2.4 V to +10 V with inputs referenced to 0 V and outputs swinging to within 30 mV of ground - eliminates need for negative rail in sensor front-ends. |
| Laser-trimmed resistor network | Ensures 0.2% gain accuracy (G = 10) and 80 dB minimum CMRR by matching R3/R4 to 0.1% ratio tolerance - critical for precision bridge measurements. |
| Integrated RFI filtering | On-chip 5 pF capacitors (C1/C2) suppress rectification-induced DC offsets from MHz-range EMI - improves stability in noisy motor-control environments. |
| 50 V continuous input overload rating | Withstands sustained overvoltage on either input without latch-up or parameter shift - protects against transients in automotive or industrial power systems. |
| 100 kHz bandwidth at G = 10 | Supports accurate amplification of 10 kHz sinusoidal signals with <0.1% gain error - sufficient for most strain-gage and pressure transducer bandwidths. |
Applications
| Current Sensing | Bridge Transducer Interface |
|---|---|
|
Use Scenario: High-side current measurement in 24 V industrial PLC outputs using a 50 mΩ shunt resistor. IC Role / Device Role / Timing Role: Differential amplifier rejecting 24 V common-mode voltage while amplifying 50 mV drop across shunt to 5 V full-scale output. Use Value: Enables direct connection to 12-bit SAR ADC without level-shifting circuitry; 90 dB CMRR reduces error to <0.3% at full scale. |
Use Scenario: Amplifying output of a 350 Ω Wheatstone bridge pressure sensor excited at +5 V. IC Role / Device Role / Timing Role: Precision gain-of-100 stage converting ±10 mV bridge differential output to ±1 V for downstream instrumentation amplifier. Use Value: Laser-trimmed resistors ensure <0.015% gain linearity; 24 µs settling supports 20 kSPS data acquisition with <0.01% fidelity. |
| Strain Gauge Signal Conditioning | Position Indicator Interface |
|
Use Scenario: Reading quarter-bridge strain gauges bonded to structural steel in wind turbine pitch control systems. IC Role / Device Role / Timing Role: Differential amplifier with G = 10 configured to amplify microvolt-level ΔV from 120 Ω gauge under mechanical stress. Use Value: 200 kΩ input resistance minimizes loading error; 500 µV max input offset ensures sub-0.1% zero-error at room temperature. |
Use Scenario: Interfacing rotary potentiometric position sensors in HVAC damper actuators operating from +5 V supply. IC Role / Device Role / Timing Role: Single-supply amplifier buffering ratiometric wiper voltage while rejecting common-mode noise from shared motor drive ground. Use Value: +26.5 V input CMR accommodates ground bounce up to 21 V; 0.03 V output floor preserves resolution near 0% travel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA126PA | Fixed G = 5, 10, or 100 via external resistor; higher input bias current (2 nA vs. AD626ANZ's 0.5 nA); no integrated FILTER pin. | Requires external gain-setting resistor and separate RC filter; less suitable for space-constrained PCBs needing integrated filtering. | Select INA126PA only if adjustable gain below 10 is required; AD626ANZ offers simpler pin-strapped configuration and built-in filter node. |
| AD8226ARMZ | Wider supply range (±2.5 V to ±18 V / +5 V to +36 V); lower quiescent current (0.12 mA); but CMRR = 80 dB typ (vs. 90 dB) at 100 Hz. | Better suited for high-voltage industrial sensors (>24 V CMV); trade-off is 10 dB lower CMRR affecting accuracy in high-CMV, low-ΔV cases. | Choose AD8226ARMZ for >30 V CMV applications; AD626ANZ remains optimal for ≤26.5 V CMV with highest CMRR and lowest cost. |
Compared with INA126PA and AD8226ARMZ, AD626ANZ uniquely combines pin-selectable gain, integrated filter node, and 90 dB CMRR in an 8-lead DIP - making it the most compact, lowest-component-count solution for 24 V industrial current and bridge sensing.
Availability
AD626ANZ is available at Aetrix Electronics and suitable for current sensing, bridge transducer interfacing, strain gauge signal conditioning, and position indicator applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD626ANZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD626ANZ belongs to Analog Devices' precision instrumentation amplifier product line, designed specifically for low-cost, single-supply signal conditioning of microvolt-level differential signals in the presence of multi-volt common-mode voltages.
FAQ
What supply voltage range does the AD626ANZ support in single-supply mode?
The AD626ANZ operates from +2.4 V to +10 V in single-supply mode, with guaranteed performance across the full industrial temperature range (–40°C to +85°C). At +5 V supply, its input common-mode range extends to +26.5 V, and output swings from +0.03 V to +4.7 V into a 10 kΩ load - enabling direct interface with standard 3.3 V/5 V microcontrollers and ADCs without level-shifting circuitry. The AD626ANZ maintains 90 dB CMRR and 24 µs settling time across this supply range.
How is gain selected on the AD626ANZ, and what are the accuracy specifications?
Gain on the AD626ANZ is selected via Pin 7 (G = 100): leaving it open configures G = 10; connecting it to analog ground configures G = 100. No external resistors are required. For AD626ANZ (A-grade), gain accuracy is ±0.5% max at G = 10 and ±0.6% max at G = 100 (dc, VOUT ≥ 100 mV), with gain linearity of ±0.016% and temperature drift of 30 ppm/°C (G = 10). These values are guaranteed over the full –40°C to +85°C range and reflect laser-trimmed internal resistor matching.
Does the AD626ANZ require external components for basic operation?
No, the AD626ANZ requires no external components for basic G = 10 or G = 100 operation - only +VS, analog ground, and input/output connections. External components are optional: a capacitor on Pin 4 (FILTER) adds low-pass filtering; a resistor between Pin 7 and ground enables gains between 10–100; and a 10 kΩ pull-down from OUT to –VS extends negative output swing in dual-supply mode. All internal resistors and filters are monolithically integrated, reducing BOM count and layout complexity versus discrete solutions.
What is the maximum continuous common-mode voltage the AD626ANZ can handle?
The AD626ANZ supports a maximum continuous common-mode voltage of +26.5 V (at +5 V supply, G = 10) and –32.5 V (dual-supply operation), with guaranteed CMRR > 85 dB. This is enabled by its internal 6× attenuator architecture, where input CMR = 6 × (VS – 1 V). At +5 V supply, this yields +24 V CMR per datasheet; measured performance reaches +26.5 V. Inputs are further protected against continuous 50 V overload - exceeding typical industrial surge requirements without external clamping.
Is the AD626ANZ pin-compatible with other packages of the same part number?
Yes, the AD626ANZ (N-8 plastic DIP) shares identical pinout and electrical specifications with the AD626AR (SOIC-8) and AD626BN (N-8, B-grade). All variants use the same 8-pin configuration: Pin 1 (–IN), Pin 2 (AGND), Pin 3 (–VS), Pin 4 (FILTER), Pin 5 (+IN), Pin 6 (G = 100), Pin 7 (OUT), Pin 8 (+VS). Mechanical dimensions differ (DIP vs. SOIC), but PCB footprint and signal routing are functionally interchangeable for drop-in replacement in existing designs.
AD626ANZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.22V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 100 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 1.5mA
- Current - Output / Channel:
- 12 mA
- Voltage - Supply Span (Min):
- 2.4 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AD626ANZ FAQ
1.How can I place an order for AD626ANZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD626ANZ 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 AD626ANZ reliable?
The price and inventory of AD626ANZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD626ANZ is usually 5 days.
3.What payment methods are accepted for AD626ANZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD626ANZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD626ANZ?
AD626ANZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD626ANZ 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 AD626ANZ?
For technical support, including AD626ANZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD626ANZ requirements.
6.How does Aetrix verify that AD626ANZ is sourced from the original manufacturer or authorized distributors?
All AD626ANZ 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 AD626ANZ meets industry standards.
7.What is the process for return or replacement of AD626ANZ?
All AD626ANZ units undergo pre-shipment inspection (PSI). If there is an issue with AD626ANZ, 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 AD626ANZ part is unused and in its original packaging.
Return procedure for AD626ANZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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