Datasheet

Input
Mux
3rdOrder
DS
Modulator
REFP REFN
PGA
Burnout
Detect
Burnout
Detect
DVDD
DGND
ADS1246
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
ADS1248 Only
SCLK
DIN
DRDY
DOUT/DRDY
CS
START
RESET
AVDD
IEXC2
InternalOscillator
Voltage
Reference
Serial
Interface
and
Control
V
BIAS
GPIO
CLK
ADS1248 Only
ADS1247
ADS1248
PGA
System
Monitor
Adjustable
Digital
Filter
Dual
Current
DACs
VREFMux
ADS1248 Only
ADS1246
ADS1247
ADS1248
www.ti.com SBAS426G –AUGUST 2008–REVISED OCTOBER 2011
GENERAL DESCRIPTION
OVERVIEW The ADS1247 and ADS1248 also include a flexible
input multiplexer with system monitoring capability
The ADS1246, ADS1247 and ADS1248 are highly
and general-purpose I/O settings, a very low-drift
integrated 24-bit data converters. They include a
voltage reference, and two matched current sources
low-noise, high-impedance programmable gain
for sensor excitation. Figure 49 and Figure 50 show
amplifier (PGA), a delta-sigma (ΔΣ) ADC with an
the various functions incorporated in each device.
adjustable single-cycle settling digital filter, internal
oscillator, and a simple but flexible SPI-compatible
serial interface.
Figure 49. ADS1246 Diagram
Figure 50. ADS1247, ADS1248 Diagram
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Product Folder Link(s): ADS1246 ADS1247 ADS1248