ISL26320_14 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, ISL26321, ISL26322, ISL26323, ISL26324,
ISL26325 and ISL26329 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 V_DD.
Members of the The ISL26320, ISL26321, ISL26322, ISL26323,
ISL26324, ISL26325 and ISL26329 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 Power-down mode.
The ISL26320, ISL26321, ISL26322, ISL26323, ISL26324,
ISL26325 and ISL26329 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
VDD
VREF
ANALOG INPUTS
DIFFERENTIAL/
SINGLE-ENDED
September 5, 2013
1
FN8273.1
MUX
BUFFER
ADC
OSC
SPI
POR
CNV
SCLK
SDO
SDI
GND
FIGURE 1. FUNCTIONAL BLOCK DIAGRAM
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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