Datasheet

Input
Mux
3rdOrder
DS
Modulator
REFP REFN
PGA
Burnout
Detect
Burnout
Detect
DVDD
DGND
ADS1146
AVSS
AIN0
AIN1
SCLK
DIN
DRDY
DOUT/DRDY
CS
START
RESET
AVDD
InternalOscillator
Adjustable
Digital
Filter
Serial
Interface
and
Control
CLK
V
BIAS
Input
Mux
3rdOrder
DS
Modulator
REFP1 REFN1 VREFOUT VREFCOM
REFP0/
GPIO0
REFN0/
GPIO1
Burnout
Detect
Burnout
Detect
DVDD
DGND
IEXC1AVSS
AIN0/IEXC
AIN1/IEXC
AIN2/IEXC/GPIO2
AIN3/IEXC/GPIO3
AIN4/IEXC/GPIO4
AIN5/IEXC/GPIO5
AIN6/IEXC/GPIO6
AIN7/IEXC/GPIO7
ADS1148 Only
SCLK
DIN
DRDY
DOUT/DRDY
CS
START
RESET
AVDD
IEXC2
InternalOscillator
Voltage
Reference
Serial
Interface
and
Control
V
BIAS
GPIO
CLK
ADS1148 Only
ADS1147
ADS1148
PGA
System
Monitor
Adjustable
Digital
Filter
Dual
Current
DACs
VREFMux
ADS1148 Only
ADS1146
ADS1147
ADS1148
www.ti.com SBAS453F –JULY 2009–REVISED APRIL 2012
GENERAL DESCRIPTION
OVERVIEW
The ADS1147 and ADS1148 also include a flexible
The ADS1146, ADS1147 and ADS1148 are highly input multiplexer with system monitoring capability
integrated 24-bit data converters. Each device and general-purpose I/O settings, a very low-drift
includes a low-noise, high-impedance programmable voltage reference, and two matched current sources
gain amplifier (PGA), a delta-sigma (ΔΣ) ADC with an for sensor excitation. Figure 17 and Figure 18 show
adjustable single-cycle settling digital filter, internal the various functions incorporated into each device.
oscillator, and a simple but flexible SPI-compatible
serial interface.
Figure 17. ADS1146 Diagram
Figure 18. ADS1147, ADS1148 Diagram
Copyright © 2009–2012, Texas Instruments Incorporated Submit Documentation Feedback 17
Product Folder Link(s): ADS1146 ADS1147 ADS1148