ADS1245IDGST ,24-bit Low-Power ADC with High-Z Input BufferFEATURES DESCRIPTIONThe ADS1245 is a 24-bit, delta-sigma analog-to-digital 20-Bit Effective Resolu ..
ADS1246IPW ,Low Noise, Precision 24-Bit Analog to Digital Converter 16-TSSOP -40 to 105features provide a complete front-end solution for• Power Supply and V Monitoring (ADS1247,REFtempe ..
ADS1247IPWR ,Low Noise, Precision 24-Bit Analog-to-Digital Converter 20-TSSOP -40 to 105Electrical Characteristics table........ 13• Added cross-reference for Equation 1 in Noise Performa ..
ADS1247IPWR ,Low Noise, Precision 24-Bit Analog-to-Digital Converter 20-TSSOP -40 to 105features provide a complete front-end solution for• Power Supply and V Monitoring (ADS1247,REFtempe ..
ADS1248IPW ,24-bit, 2kSPS, 8-ch ADC for Precision Sensor Measurement 28-TSSOP -40 to 105features to reduce• Simultaneous 50-Hz and 60-Hz Rejection at 20system cost and component count for ..
ADS1248IPWR ,24-bit, 2kSPS, 8-ch ADC for Precision Sensor Measurement 28-TSSOP -40 to 105features provide a complete front-end solution for• Power Supply and V Monitoring (ADS1247,REFtempe ..
AL106-84 , GaAs IC 900 MHz High Dynamic Range Amplifier
AL106-84 , GaAs IC 900 MHz High Dynamic Range Amplifier
AL108-338 , GaAs PHEMT Switchable Gain LNA
AL3000 , IP Frame Routing Processor
AL3157F-7 , HIGH EFFICIENCY 1x/2x CHARGE PUMP LED DRIVER FOR SMALL SCREEN BACKLIGHTING
AL3158FSG-7 , HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
ADS1245IDGST
24-bit Low-Power ADC with High-Z Input Buffer
FEATURES 20-Bit Effective Resolution High-Impedance Buffered Input ±2.5V Differential Input Range
Pin-Compatible with ADS1244 0.0006% INL (typ), 0.0015% INL (max) Simple Two-Wire Serial Interface Simultaneous 50Hz and 60Hz Rejection Single Conversions with Sleep Mode Single-Cycle Settling Self-Calibration Well Suited for Multi-Channel Systems Easily Connects to the MSP430 Current Consumption: 158µA Analog Supply: 2.5V to 5.25V Digital Supply: 1.8V to 3.6V
APPLICATIONS Hand-Held Instrumentation Portable Medical Equipment Industrial Process Control Test and Measurement Systems
DESCRIPTIONThe ADS1245 is a 24-bit, delta-sigma analog-to-digital
converter (ADC). It offers excellent performance and very
low power in an MSOP-10 package and is well suited for
demanding high-resolution measurements, especially in
portable and other space- and power-constrained
systems.
The buffered input presents an impedance of 3GΩ, mini-
mizing measurement errors when using high-impedance
sources. The ADS1245 is compatible with ADS1244 and
offers a direct upgrade path for designs requiring higher in-
put impedance.
A third-order delta-sigma (∆Σ) modulator and digital filter
form the basis of the ADC. The analog modulator has a
±2.5V differential input range. The digital filter rejects both
50Hz and 60Hz signals, completely settles in one cycle,
and outputs data at 15 samples per second (SPS).
A simple, two-wire serial interface provides all the
necessary control. Data retrieval, self-calibration, and
Sleep mode are handled with a few simple waveforms.
When only single conversions are needed, the ADS1245
can be shut down (Sleep mode) while idle between
measurements to dramatically reduce the overall power
dissipation. Multiple ADS1245s can be connected
together to create a synchronously sampling multichannel
measurement system. The ADS1245 is designed to easily
connect to microcontrollers, such as the MSP430.
The ADS1245 supports 2.5V to 5.25V analog supplies and
1.8V to 3.6V digital supplies. Power is typically less than
470µW in normal operation and less than 1µW during
Sleep mode.
DRDY/DOUT
SCLK
CLK
AINN
AINP
VREFP VREFN AVDD
GND
DVDD
SBAS287A − JUNE 2003 − REVISED SEPTEMBER 2003
Low-Power, 24-Bit
Analog-to-Digital Converter
ADS1245
