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Analog Devices Inc. AD8426BCPZ-WP
- Part No.:
- AD8426BCPZ-WP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VQFN, CSP
- Datasheet:
-
AD8426BCPZ-WP.pdf
- Description:
- IC INST AMP 2 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:157
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Product details
Overview
AD8426BCPZ-WP from Analog Devices is a dual-channel, rail-to-rail output instrumentation amplifier with wide supply range (±1.35 V to ±18 V or 2.2 V to 36 V), gain set by a single external resistor (1–1000), and specified operation from −40°C to +125°C. It features 24 nV/√Hz input voltage noise, 80 dB minimum CMRR at G = 1, and robust input overvoltage protection (±35 V with ±5 V supplies), enabling use in industrial bridge amplifiers and portable data acquisition.
For engineers reviewing the AD8426BCPZ-WP datasheet, AD8426BCPZ-WP pinout, AD8426BCPZ-WP application, or AD8426BCPZ-WP equivalent, key selection criteria include its dual-in-amp LFCSP package, rail-to-rail output swing, input voltage range extending below negative supply, low quiescent current (350 μA per amplifier), and guaranteed performance across automotive and industrial temperature extremes.
Technical Context
The AD8426BCPZ-WP implements a three-op-amp instrumentation architecture with PNP-input stages, enabling input common-mode voltage operation below the negative supply rail and high input impedance (0.8 GΩ differential). Its gain is set via two matched RG terminals per channel using the formula G = 1 + (49.4 kΩ/RG), supporting precise, resistor-defined amplification without internal trimming.
Each channel includes independent reference inputs (REF1/REF2) with unity gain and 0.01% gain error, allowing flexible level-shifting of output DC offset. Input overvoltage tolerance (±40 V beyond rails) and ESD protection (1.5 kV HBM) support direct connection to real-world sensors in noisy industrial environments without external clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 1000, set by one external resistor per channel - enables scalable signal conditioning without redesign. |
| Input Voltage Noise | 24 nV/√Hz at 1 kHz - supports low-level sensor signal amplification with minimal added noise. |
| CMRR (G = 1) | 80 dB min (DC to 60 Hz) - rejects common-mode interference in bridge and transducer circuits. |
| Supply Range | Single: 2.2 V to 36 V; Dual: ±1.35 V to ±18 V - operates from low-voltage battery to industrial bus rails. |
| Quiescent Current | 350 μA per amplifier at +25°C - enables multichannel designs with constrained power budgets. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, motor control, and harsh industrial use. |
| Input Overvoltage | ±40 V beyond rails - eliminates need for external protection diodes when interfacing to unconditioned sensors. |
Pinout & Package
The AD8426BCPZ-WP uses a 16-lead 4 mm × 4 mm LFCSP package with no exposed metal pad, maximizing PCB routing area and eliminating leakage paths to ground. Pin numbering follows standard JEDEC top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 12 | −IN1, −IN2 | Inverting inputs for Channel 1 and Channel 2 - accept differential signals from bridges or transducers. |
| 2, 3, 10, 11 | RG1, RG1, RG2, RG2 | Dual-terminal gain-setting nodes per channel - ensure matched resistance for accurate G = 1 + (49.4 kΩ/RG). |
| 4, 9 | +IN1, +IN2 | Noninverting inputs - high-impedance PNP inputs enable operation below negative supply. |
| 5, 16 | +VS | Positive supply pins - dual connections reduce supply path inductance and improve PSRR. |
| 6, 7 | REF1, REF2 | Reference inputs - set output DC level independently per channel with 100 kΩ input impedance. |
| 8, 13 | −VS | Negative supply pins - dual connections enhance stability in dual-supply configurations. |
| 14, 15 | OUT2, OUT1 | Amplified outputs - rail-to-rail swing allows full utilization of ADC input range without level-shifting. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel integration | Two matched instrumentation amps in 4 mm × 4 mm LFCSP - reduces board space vs. discrete solutions by >50%. |
| Rail-to-rail output | Swings within 0.1 V of rails at light loads - maximizes dynamic range into 12- to 16-bit ADCs. |
| Input below negative rail | Operates with input down to −VS − 0.15 V at −40°C - enables single-supply amplification of near-ground signals. |
| Robust input protection | Withstands ±35 V input with ±5 V supplies - eliminates external protection components in field-deployed systems. |
| Temperature-stable gain | Gain drift ≤ 5 ppm/°C (G = 1) from −40°C to +85°C - maintains calibration integrity in thermal cycling environments. |
Applications
| Industrial Process Control | Bridge Amplifier |
|---|---|
Use Scenario: Monitoring pressure, flow, and temperature in PLC I/O modules with 4–20 mA loops and isolated sensor interfaces. IC Role / Device Role / Timing Role: Precision front-end amplifier converting mV-level bridge outputs to ratiometric voltage signals for SAR ADCs. Use Value: 80 dB CMRR and 24 nV/√Hz noise ensure <0.1% measurement accuracy across −40°C to +85°C ambient ranges. | Use Scenario: Strain-gage-based load cells in weigh scales and structural health monitoring systems. IC Role / Device Role / Timing Role: Differential signal conditioner rejecting common-mode noise from long cable runs and EMI sources. Use Value: Input overvoltage tolerance (±40 V) prevents damage during cable disconnect transients or ESD events. |
| Medical Instrumentation | Portable Data Acquisition |
Use Scenario: Biopotential sensing in ECG/EMG devices requiring low-noise, high-CMRR amplification of microvolt signals. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with adjustable gain and reference-controlled DC offset. Use Value: 0.5 μV/°C input offset drift ensures stable baseline over patient body temperature variations. | Use Scenario: Battery-powered field data loggers measuring thermocouples, RTDs, and vibration sensors. IC Role / Device Role / Timing Role: Low-power, wide-supply-range signal conditioner enabling operation from 2.2 V coin cell to 36 V industrial bus. Use Value: 350 μA per amplifier quiescent current extends battery life while maintaining 1 MHz bandwidth at G = 1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8426ARMZ | Same die, MSOP-16 package (4.9 mm × 3 mm) with exposed thermal pad - higher θJA (120°C/W vs. 86°C/W). | Less suitable for high-density, zero-airflow PCBs due to reduced thermal performance. | Select AD8426BCPZ-WP for space-constrained, thermally demanding industrial layouts. |
| AD8226ARZ | Single-channel version, same specs except quiescent current (325 μA) and package (SOIC-8); no dual REF pins. | Requires two units for dual-channel needs - increases board area and BOM count. | Choose AD8426BCPZ-WP when dual-channel matching, layout efficiency, and REF flexibility are required. |
Compared with AD8426ARMZ and AD8226ARZ, the AD8426BCPZ-WP delivers superior thermal management in compact layouts and eliminates inter-channel gain/offset mismatch inherent in discrete dual implementations, making it optimal for multichannel precision analog front-ends.
Availability
AD8426BCPZ-WP is available at Aetrix Electronics and suitable for industrial process controls, bridge amplifiers, and portable data acquisition requiring stable component supply across extended temperature and voltage ranges.
Supply support for AD8426BCPZ-WP 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.
The AD8426 product line delivers dual-channel, low-cost instrumentation amplifiers optimized for space-constrained, wide-supply industrial and medical systems requiring rail-to-rail output and extended temperature operation.
FAQ
What is the maximum gain error specification for AD8426BCPZ-WP at G = 1?
The AD8426BCPZ-WP has a maximum gain error of 0.04% at G = 1 (VOUT ±10 V), with typical performance at 0.01%. This error remains stable across temperature (≤5 ppm/°C drift) and supports high-accuracy sensor signal conditioning without post-calibration trimming.
Does AD8426BCPZ-WP support true single-supply operation with input signals near ground?
Yes. The AD8426BCPZ-WP input common-mode range extends to −VS − 0.15 V at −40°C, enabling amplification of signals near 0 V on a 2.7 V single supply. Its PNP-input stage allows operation below the negative rail, eliminating the need for dual supplies in low-voltage sensor interfaces.
How does the LFCSP package of AD8426BCPZ-WP improve PCB layout versus MSOP alternatives?
The AD8426BCPZ-WP's 4 mm × 4 mm LFCSP lacks an exposed metal pad, freeing routing space beneath the device and avoiding leakage paths. Its symmetrical pinout (dual +VS/−VS and REF pins) minimizes vias and trace length in multichannel layouts, unlike the MSOP-16 which requires thermal pad grounding and longer interconnects.
What is the small-signal bandwidth of AD8426BCPZ-WP at G = 100?
The AD8426BCPZ-WP delivers 20 kHz small-signal −3 dB bandwidth at G = 100 under dual-supply conditions (±15 V). Bandwidth scales inversely with gain, ensuring predictable frequency response for anti-aliasing filter design in data acquisition systems.
Can AD8426BCPZ-WP drive a 10 kΩ load rail-to-rail across the full temperature range?
Yes. At TA = +25°C, AD8426BCPZ-WP drives 10 kΩ loads with output swing from −VS + 0.2 V to +VS − 0.2 V. At +125°C, swing degrades to −VS + 0.3 V to +VS − 0.3 V - still fully compatible with 12-bit+ ADCs requiring ≥1.8 Vpp input range.
AD8426BCPZ-WP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-VQFN, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 350µA (x2 Channels)
- Current - Output / Channel:
- 13 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP-VQ (4x4)
AD8426BCPZ-WP FAQ
1.How can I place an order for AD8426BCPZ-WP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8426BCPZ-WP 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 AD8426BCPZ-WP reliable?
The price and inventory of AD8426BCPZ-WP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8426BCPZ-WP is usually 5 days.
3.What payment methods are accepted for AD8426BCPZ-WP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8426BCPZ-WP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8426BCPZ-WP?
AD8426BCPZ-WP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8426BCPZ-WP 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 AD8426BCPZ-WP?
For technical support, including AD8426BCPZ-WP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8426BCPZ-WP requirements.
6.How does Aetrix verify that AD8426BCPZ-WP is sourced from the original manufacturer or authorized distributors?
All AD8426BCPZ-WP 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 AD8426BCPZ-WP meets industry standards.
7.What is the process for return or replacement of AD8426BCPZ-WP?
All AD8426BCPZ-WP units undergo pre-shipment inspection (PSI). If there is an issue with AD8426BCPZ-WP, 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 AD8426BCPZ-WP part is unused and in its original packaging.
Return procedure for AD8426BCPZ-WP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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