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ADS1248IPW

24 Bit Analog to Digital Converter 4, 7 Input 1 Sigma-Delta 28-TSSOP

Manufacturer:

TI
Mfr.Part #:

ADS1248IPW
Datasheet:

ADS1248IPW Datasheet (PDF)
Pbfree Code:

Yes
Part Life Cycle Code:

Active
Pin Count:

28
Reach Compliance Code:

compliant
EDA/CAD Models:

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ADS1248IPW General Description

The ADS1246, ADS1247, and ADS1248 are highly-integrated, precision, 24-bit analog-to-digital converters (ADCs). The devices feature an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1247 and ADS1248 also provide a built-in, very low drift voltage reference with 10-mA output capacity, and two matched programmable current digital-to-analog converters (DACs). The devices provide a complete front-end solution for temperature sensor applications including thermal couples, thermistors, and resistance temperature detectors (RTDs).

An input multiplexer supports four differential inputs for the ADS1248, two for the ADS1247, and one for the ADS1246. In addition, the multiplexer has a sensor burn-out detect, voltage bias for thermocouples, system monitoring, and general-purpose digital I/Os (ADS1247 and ADS1248). The onboard, low-noise PGA provides selectable gains of 1 to 128. The ΔΣ modulator and adjustable digital filter settle in only one cycle, for fast channel cycling when using the input multiplexer, and support data rates up to 2 kSPS. For data rates of 20 SPS or less, both 50-Hz and 60-Hz interference are rejected by the filter.

Key Features

24 Bits, No Missing Codes
Programmable Data Rates Up to 2 kSPS
Single-Cycle Settling for All Data Rates
Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS
Analog Multiplexer With 8 (ADS1248) and 4
(ADS1247) Independently Selectable Inputs
Low-Noise PGA: 48 nV_RMS at PGA = 128
Dual-Matched Programmable Excitation Current Sources
Low-Drift Internal 2.048-V Reference:
10 ppm/°C (Maximum)
Sensor Burn-Out Detection
4 or 8 General-Purpose I/Os (ADS1247, ADS1248)
Internal Temperature Sensor
Power Supply and V_REF Monitoring (ADS1247, ADS1248)
Self and System Calibration
SPI™-Compatible Serial Interface
Analog Supply: Unipolar (2.7 V to 5.25 V) and Bipolar (±2.5 V) Operation
Digital Supply: 2.7 V to 5.25 V
Operating Temperature –40°C to 125°C
APPLICATIONS
- Temperature Sensor Measurements:
  - RTDs, Thermocouples, and Thermistors
- Pressure Measurements
- Flow Meters
- Factory Automation and Process Controls

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Specifications

Source Content uid	ADS1248IPW	Pbfree Code	Yes
Part Life Cycle Code	Active	Pin Count	28
Reach Compliance Code	compliant	ECCN Code	EAR99
HTS Code	8542.39.00.01	Converter Type	ADC, DELTA-SIGMA
JESD-30 Code	R-PDSO-G28	Moisture Sensitivity Level	2
Number of Analog In Channels	8	Number of Bits	24
Number of Functions	1	Number of Terminals	28
Output Bit Code	2'S COMPLEMENT BINARY	Output Format	SERIAL
Peak Reflow Temperature (Cel)	260	Surface Mount	YES
Temperature Grade	INDUSTRIAL	Terminal Finish	NICKEL PALLADIUM GOLD
Terminal Form	GULL WING	Terminal Position	DUAL
Time@Peak Reflow Temperature-Max (s)	30