ISL267450A

12-Bit 1MSPS SAR ADCs

Product Status: Mass Production

OVERVIEW

The ISL267440 and ISL267450A are 10-bit and 12-bit, 1MSPS sampling SAR-type ADCs featuring excellent linearity over supply and temperature variations. These devices are drop-in compatible with the AD7440 and AD7450A. The robust, fully-differential input offers high impedance to minimize errors due to leakage currents, and the specified measurement accuracy is maintained with input signals up to the supply rails.

The reference accepts inputs from 0.1V to 2.2V for 3V operation and 0.1V to 3.5V for 5V operation. This provides design flexibility in a wide variety of applications. The ISL267440, ISL267450A also feature up to 8kV Human Body Model ESD survivability.

The serial digital interface is SPI compatible and is easily interfaced to popular FPGAs and microcontrollers. Power dissipation is 8.5mW at a sampling rate of 1MSPS, and just 5µW between conversions utilizing Auto Power-Down mode (with a 5V supply). The ISL267440, ISL267450A are excellent solutions for remote industrial sensors and battery-powered instruments.

The ISL267440, ISL267450A are available in an 8 lead MSOP package, and are specified for operation over the Industrial temperature range (–40°C to +85°C).

KEY FEATURES

  • Drop-in Compatible with AD7440, AD7450A
  • Differential Input
  • Simple SPI-compatible Serial Digital Interface
  • Guaranteed No Missing Codes
  • 1MHz Sampling Rate
  • 3V or 5V Operation
  • Low Operating Current
  • 1.25mA at 1MSPS with 3V Supplies
  • 1.70mA at 1MSPS with 5V Supplies
  • Power-down Current between Conversions: 1µA
  • Excellent Differential Non-Linearity
  • Low THD: -83dB (typ)
  • Pb-Free (RoHS Compliant)
  • Available in MSOP Package

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL267450A
Basic Information
Production Status
Mass Production
# of Devices/ Channels
1
Resolution Bits
12
Max Conversion Rate (kSPS)
1000
Integral NonLinearity LSB
1
Differential NonLinearity LSB
0.95
SINAD (dbFS)
70
SFDR in dBs
-76 dB
Power Consumption (mW)
2
Analog Supply Voltage Min (V)
2.7
Analog Supply Voltage Max (V)
5.25
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +85

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