ISL26320 Datasheet, PDF (1/23 Pages) Intersil Corporation – 12-bit, 250kSPS Low-power ADCs with Single-ended and Differential Inputs and Multiple Input Channels

12-bit, 250kSPS Low-power ADCs with Single-ended
and Differential Inputs and Multiple Input Channels
ISL26320, ISL26321, ISL26322,
ISL26323, ISL26324, ISL26325,
ISL26329
The ISL26320/21/22/23/24/25/29 family of sampling
SAR-type ADCs feature excellent linearity over supply and
temperature variations, and offer versions with 1-, 2-, 4- and
8-channel single-ended inputs, and 1-, 2- and 4-channel
differential inputs.
A proprietary input multiplexer and combination buffer amplifier
reduces the input drive requirements, resulting in lower cost and
reduced board space. Specified measurement accuracy is
maintained with input signals up to VDD.
Members of the ISL26320/21/22/23/24/25/29 family of
Low-Power ADCs offer pinout intercompatibility, differing only in
the analog inputs, to support quick replication of proven layouts
across multiple design platforms.
The serial digital interface is SPI compatible and is easily
interfaced to popular FPGAs and microcontrollers. Power
consumption is limited to 15mW at a sampling rate of 250kSPS,
and an operating current of just 8μA typical between
conversions, when configured for Auto Powerdown mode.
The ISL26320/21/22/23/24/25/29 feature up to 5kV Human
Body Model ESD survivability and are available in the popular
SOIC and TSSOP packages. Performance is specified for
operation over the full industrial temperature range (-40°C to
+125°C).
Features
• Pin-compatible Family Allows Easy Design Upgrades
• Excellent Differential Non-Linearity (0.7LSB max)
• Low THD: -86dB (typ)
• Simple SPI-compatible Serial Digital Interface
• Low 3mA Operating Current
• Power-down Current between Conversions 8μA (typ)
• +5.25V to +2.7V Supply
• Excellent ESD Survivability: 5kV HBM, 350V MM, 2kV CDM
Applications
• Industrial Process Control
• Energy Measurement
• Multichannel Data Acquisition Systems
• Pressure Sensors
• Flow Controllers
June 8, 2012
FN8273.0
FIGURE 1. FUNCTIONAL BLOCK DIAGRAM
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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