Texas Instruments ADS1257
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.| Part No. | ADS1257 |
|---|---|
| Datasheet | ADS1257 Download |
| Manufacturer |  Texas Instruments |
| Description | 30-kSPS 4-Channel 24-Bit ADC |
| Buy | Stock & Price |
FEATURES
●1 Up to 23-Bits Noise-Free Resolution● Small 5-mm × 5-mm VQFN Package
● 4 Analog Inputs – 2 Differential or 3 Single-Ended Measurements
● Excellent DC Performance – Offset Drift: 4 nV/°C (Gain = 64) – Gain Drift: 0.8 ppm/°C – Nonlinearity: 3 ppm (Gain = 1)
● Programmable Data Rates: 2.5 SPS to 30 kSPS
● Single-Cycle Settled Conversions (≤ 1000 SPS)
● 50-Hz and 60-Hz Rejection
● High Impedance Input Buffer
● Differential-Input PGA
● Integrated Sensor Break Detection
● 2 General-Purpose Input/Outputs
● Power Supplies: – Analog: 5 V – Digital: 1.8 V to 3.6 V
● 5-V Tolerant SPI™-Compatible Serial Interface 2
APPLICATIONS
● Factory Automation and Process Control● Test and Measurement
● Medical Equipment
● Scientific Instrumentation 3
DESCRIPTION
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.
