ADS1222IPWR ,24 BIT ANALOG TO DIGITAL CONVERTER WITH 2-CHANNEL DIFFERENTIAL INPUT MULTIPLEXERSBAS314B − APRIL 2004 − REVISED JANUARY 2009 ..
ADS1222IPWR ,24 BIT ANALOG TO DIGITAL CONVERTER WITH 2-CHANNEL DIFFERENTIAL INPUT MULTIPLEXERSBAS314B − APRIL 2004 − REVISED JANUARY 2009
ADS1222IPWT ,24 BIT ANALOG TO DIGITAL CONVERTER WITH 2-CHANNEL DIFFERENTIAL INPUT MULTIPLEXERSBAS314B − APRIL 2004 − REVISED JANUARY 2009(1)ORDERING INFORMATIONPACKAGE PACKAGE TRANSPORT MEDIA, ..
ADS1222IPWTG4 ,24-Bit A/D Conv with 2-Channel Diff Input Multiplexer 14-TSSOP -40 to 85MAXIMUM RATINGSInstruments recommends that all integrated circuits be(1)over operating free-air tem ..
ADS1224 ,24-Bit Analog-to-Digital Converter with 4-Channel Differential Input MultiplexerELECTRICAL CHARACTERISTICS All specifications at T = −40°C to +85°C, AVDD = +5V, DVDD = +5V, f = ..
ADS1224IPWR ,24-Bit Analog-to-Digital Converter with 4-Channel Differential Input MultiplexerMAXIMUM RATINGSInstruments recommends that all integrated circuits be(1)over operating free-air tem ..
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AK9844F , 4Kbit EEPROM with 4ch 8bit D/A Converter
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ADS1222-ADS1222IPWR-ADS1222IPWT-ADS1222IPWTG4
24-Bit A/D Conv with 2-Channel Diff Input Multiplexer 14-TSSOP -40 to 85
SBAS314B − APRIL 2004 − REVISED JANUARY 2009
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FEATURES 240SPS Data Rate with 4MHz Clock 20-Bit Effective Resolution Input Multiplexer with Two 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
APPLICATIONS Hand-Held Instrumentation Portable Medical Equipment Industrial Process Control Weigh Scales
DESCRIPTIONThe ADS1222 is a 2-channel, 24-bit, delta-sigma ana-
log-to-digital (A/D) converter. It offers excellent perfor-
mance and low power in a TSSOP-14 package. The
ADS1222 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 two 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 ADS1222 can be quickly shut down (Standby mode)
while idle between measurements to dramatically
reduce the overall power consumption. Multiple
ADS1222s can be connected together to create a
synchronously sampling multichannel measurement
system. The ADS1222 is designed to easily connect to
microcontrollers, such as the MSP430.
The ADS1222 supports 2.7V to 5.5V supplies. Power
is typically less than 1mW in 3V operation and less than
1µW during Standby mode.
VREFP VREFN
VDD
GNDMUX
AINP1
AINN1
AINP2
AINN2
CLK
DRDY/DOUT
SCLK
TEMPEN
BUFEN
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