AD8426
Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier
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Overview
Features and Benefits
- 2 channels in a small,
4 mm × 4 mm LFCSP - LFCSP package has no
metal pad
-- More routing room
-- No current leakage to pad - Gain set with 1 external resistor
-- Gain range: 1 to 1000 - Input voltage goes below ground
- Inputs protected beyond supplies
- Very wide power supply range
-- Single supply: 2.2 V to 36 V
-- Dual supply: ±1.35 V to ±18 V - Bandwidth (G = 1): 1 MHz
- CMRR (G = 1): 80 dB minimum
- Input noise: 24 nV/√Hz
- Typical supply current
(per amp): 350 μA - Specified temperature range: −40°C to +125°C
Product Details
The AD8426 is a dual-channel, low cost, wide supply range instrumentation amplifier that requires only one external resistor to set any gain from 1 to 1000.The AD8426 is designed to work with a variety of signal voltages. A wide input range and rail-to-rail output allow the signal to make full use of the supply rails. Because the input range can also go below the negative supply, small signals near ground can be amplified without requiring dual supplies. The AD8426 operates on supplies ranging from ±1.35 V to ±18 V for dual supplies and 2.2 V to 36 V for a single supply.
The robust AD8426 inputs are designed to connect to real-world sensors. In addition to its wide operating range, the AD8426 can handle voltages beyond the rails. For example, with a ±5 V supply, the part is guaranteed to withstand ±35 V at the input with no damage. Minimum and maximum input bias currents are specified to facilitate open-wire detection.
The AD8426 is designed to make PCB routing easy and efficient. The two amplifiers are arranged in a logical way so that typical application circuits have short routes and few vias. Unlike most chip scale packages, the AD8426 does not have an exposed metal pad on the bottom of the part, which frees additional space for routing and vias. The AD8426 offers two in-amps in the equivalent board space of a typical MSOP package.
The AD8426 is ideal for multichannel, space-constrained industrial applications. Unlike other low cost, low power instrumentation amplifiers, the AD8426 is designed with a minimum gain of 1 and can easily handle ±10 V signals. With its space-saving LFCSP package and 125°C temperature rating, the AD8426 thrives in tightly packed, zero airflow designs.
The AD8226 is the single channel version of the AD8426.
APPLICATIONS
- Industrial process controls
- Bridge amplifiers
- Medical instrumentation
- Portable data acquisition
- Multichannel systems
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Documentation & Resources
Tools & Simulations
In-Amp Diamond Plot Tool
The Diamond Plot Tool is a web application that generates a configuration-specific Output Voltage Range vs. Input Common-Mode Voltage graph, also known as the Diamond Plot, for Analog Devices Instrumentation Amplifiers. Based on user inputs such as supply voltage, gain, and input signal range, the tool detects saturation and recommends in-amps for which the input signal is in-range and the configuration is valid. Avoid saturation, find the best in-amp for your design, and save time.
SPICE Model
CIR
AD8426 SPICE Macro-Model
3.21 K
Reference Designs (1)
Product Recommendations
AD8426 Circuits
- Differential Voltage Measurement
- Low Power Strain Gauge Signal Measurement
- Precision Differential Voltage Measurement
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD8426ACPZ-R7 | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm x 0.85mm) | |
| AD8426ACPZ-WP | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm x 0.85mm) | |
| AD8426BCPZ-R7 | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm x 0.85mm) | |
| AD8426BCPZ-WP | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm x 0.85mm) | |
| Wafer Fabrication Data |
PCN-PDN Information
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Support & Discussions
AD8426 Discussions
RE: ad8426 instrumental amplifier
5 week(s) ago in Instrumentation Amplifiers
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