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Details for ADS1257IRGWT by Texas Instruments
Semiconductors - ICs > Data & Signal Conversion > Analog-to-Digital Converters - ADC
ADC 4-CH DELTA-SIGMA 24BIT VQFN-20
ADS1257IRGWT image

ADS1257IRGWT by Texas Instruments

ADC 4-CH DELTA-SIGMA 24BIT VQFN-20
Features
2 General-Purpose Input/Outputs
4 Analog Inputs u2013 2 Differential or 3 Single-Ended Measurements
5-V Tolerant SPIu2122-Compatible Serial Interface
50-Hz and 60-Hz Rejection
Differential-Input PGA
Excellent DC Performance u2013 Offset Drift: 4 nV/u00b0C (Gain = 64) u2013 Gain Drift: 0.8 ppm/u00b0C u2013 Nonlinearity: 3 ppm (Gain = 1)
High Impedance Input Buffer
Integrated Sensor Break Detection
Power Supplies: u2013 Analog: 5 V u2013 Digital: 1.8 V to 3.6 V
Programmable Data Rates: 2.5 SPS to 30 kSPS
Single-Cycle Settled Conversions (u2264 1000 SPS)
Small 5-mm u00d7 5-mm VQFN Package
Up to 23-Bits Noise-Free Resolution
Part Information
ADS1257IRGWT image
RoHS Compliant
Description
The ADS1257 is a low-noise, 30-kSPS, 24-bit, deltasigma (ΔΣ) analog-to-digital converter (ADC) with an integrated multiplexer (mux), input buffer, and programmable gain amplifier (PGA) in a small 20-pin, 5-mm × 5-mm VQFN package. The combination of integration, high conversion rate, and 24-bit resolution together in a small package makes the device ideally suited for space-constrained applications. The input multiplexer accepts either two differential or three single-ended input measurements. The sensorbreak detection circuit verifies the input connection continuity to the ADC. The selectable input buffer greatly increases the input impedance, and in many cases, eliminates the need for external buffers. The buffer input voltage range includes AGND. The lownoise PGA provides gains from 1 to 64 to accommodate a wide range of inputs signals. The programmable digital filter optimizes ADC resolution (up to 23 bits noise-free) and conversion rates (up to 30 kSPS). The digital filter provides single-cycle settled conversions, and rejection of 50-Hz and 60-Hz interference signals. The SPI-compatible serial interface operates with as little as three wires, simplifying connections to external controllers. Integrated calibration features support both self and system correction of offset and gain errors for all PGA gain settings. Two bidirectional digital I/Os pins control external circuits.
Specifications
Resolution (Bits):
24bit
Sampling Rate:
30kSPS
Input Channel Type:
Differential Single Ended
Data Interface:
SPI
Supply Voltage Type:
Single
Supply Voltage Min:
4.75V
Supply Voltage Max:
5.25V
ADC / DAC Case Style:
VQFN
No. of Pins:
20Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
Quad 24-Bit Sigma-Delta ADCs
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
MSL 3 - 168 hours
SVHC:
No SVHC (27-Jun-2018)
Alternate Descriptions
ADC Quad Delta-Sigma 30ksps 24-Bit Serial 20-Pin VQFN T/R Avnet America
ADC Quad Delta-Sigma 30ksps 24-Bit Serial 20-Pin VQFN T/R Avnet Europe