ADS1224IPWT ,24-Bit Analog-to-Digital Converter with 4-Channel Differential Input MultiplexerSBAS286C − JUNE 2003 − REVISED JANUARY 2009 ..
ADS1224IPWT ,24-Bit Analog-to-Digital Converter with 4-Channel Differential Input MultiplexerFEATURES DESCRIPTION 240SPS Data Rate with 4MHz Clock The ADS1224 is a 4-channel, 24-bit, delta-si ..
ADS1224IPWTG4 ,24-bit, 240SPS ADC with 4-ch Diff Input Mux, High-Z Buffer, Serial Output 20-TSSOP -40 to 85SBAS286C − JUNE 2003 − REVISED JANUARY 2009(1)ORDERING INFORMATIONSPECIFIEDPACKAGE PACKAGE ORDERING ..
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ADS1224-ADS1224IPWR-ADS1224IPWT-ADS1224IPWTG4
24-bit, 240SPS ADC with 4-ch Diff Input Mux, High-Z Buffer, Serial Output 20-TSSOP -40 to 85
SBAS286C − JUNE 2003 − REVISED JANUARY 2009
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FEATURES 240SPS Data Rate with 4MHz Clock 20-Bit Effective Resolution Input Multiplexer with Four Differential
Channels Pin-Selectable, High-Impedance Input Buffer ±5V Differential Input Range
0.0003% INL (typ), 0.0015% INL (max) Self-Calibrating Simple 2-Wire Serial Interface On-Chip Temperature Sensor Single Conversions with Standby Mode Low Current Consumption: 300µA Analog Supply: 2.7V to 5.5V Digital Supply: 2.7V to 5.5V
APPLICATIONS Hand-Held Instrumentation Portable Medical Equipment Industrial Process Control Weigh Scales
DESCRIPTIONThe ADS1224 is a 4-channel, 24-bit, delta-sigma ana-
log-to-digital (A/D) converter. It offers excellent perfor-
mance and low power in a TSSOP-20 package. The
ADS1224 is well-suited for demanding, high-resolution
measurements, especially in portable systems and oth-
er space-saving and power-constrained applications.
A delta-sigma (∆Σ) modulator and digital filter form the
basis of the A/D converter. The analog modulator has ±5V differential input range. An input multiplexer
(MUX) is used to select between four separate
differential input channels. A buffer can be selected to
increase the input impedance of the measurement.
A simple, 2-wire serial interface provides all the
necessary control. Data retrieval, self-calibration, and
Standby mode are handled with a few simple
waveforms. When only single conversions are needed,
the ADS1224 can be quickly shut down (Standby mode)
while idle between measurements to dramatically
reduce the overall power consumption. Multiple
ADS1224s can be connected together to create a
synchronously sampling multichannel measurement
system. The ADS1224 is designed to easily connect to
microcontrollers, such as the MSP430.
The ADS1224 supports 2.7V to 5.5V analog supplies
and 2.7V to 5.5V digital supplies. Power is typically less
than 1mW in 3V operation and less than 1µW during
Standby mode.
VREFP VREFN
AVDD DVDD
GNDMUX0
AINP1
AINN1
AINP2
AINN2
AINP3
AINN3
AINP4
AINN4
CLK
DRDY/DOUT
SCLK
TEMPEN
MUX1 BUFEN
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