The DADS1274 (4-channel) and DADS1278 (8-channel) are 24-bit, (Δ - Σ) analog-to-digital converters (ADCs) capable of up to 144k samples per second (SPS), allowing for simultaneous sampling of 4 or 8 channels. The chips are housed in the same package and can be scaled down. These high-resolution ADCs offer large usable bandwidth in audio applications, but with significantly less offset and drift than comparable industrial products. The DADS1274 and DADS1278 are suitable for high-precision industrial measurements requiring stringent DC and AC specifications.

A high-order steady-state chopper regulator achieves very low drift and in-band noise. An on-chip decimation filter suppresses out-of-band noise. The analog-to-digital converter provides usable signal bandwidth up to 90% of the Nyquist rate, with in-band ripple less than 0.005 dB.

Four operating modes allow users to choose a balance between speed, resolution, and power consumption. All operations are directly controlled by pins, eliminating the need for programmable registers.

The chip meets a wide temperature range ( DADS1278-L2 and DADS1274-L2 support -55 °C to +210°C).
The chip is packaged in plastic eTQFP-64 and ceramic CQFP-64 packages.
 

• 4/8 channel synchronous measurement.
• Maximum sampling rate of 144kSPS.
• AC characteristics: 
•         70kHz bandwidth.
•         110 dB SNR.
•         -109dB THD.
• DC accuracy: 
•         0.8 µV /℃ DC temperature drift.
•         1.3ppm/℃ gain temperature drift.
• Optional operating modes:
•         High speed: 128kSPS, 106dB SNR.
•         High resolution: 52kSPS, 110 dB SNR.
•         Low power consumption: 52kSPS, 39mW/channel.
•         Low speed: 10kSPS, 9mW/channel.
• Built-in linear digital filter.
• SPITM or synchronous frame serial interface.
• Low aperture error.
• Supports modulator output mode.
• Analog power supply: 5V.
• Digital core: 1.8V.
• I/O power supply: 1.8V - 3.3V.

• Vibration Analysis.
• Multi-channel data acquisition.
• Acoustic/Dynamic Strainer.
• Pressure sensor.