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The ADS1285IRHBR 32-bit low power ADC features a programmable gain amplifier (PGA) and a finite impulse response (FIR) filter. The ADC is designed to meet the stringent requirements of low noise precision digitization and longer battery life of seismic monitoring equipment. Low noise PGA allows direct connection of seismometers and transformer coupled hydrophones without the need for an external amplifier.

The ADC consists of a high resolution Delta-sigma modulator and an FIR filter with a programmable phase response. A high-pass filter removes DC and low frequency components from the signal. The clock frequency error is compensated by a sampling rate converter with a resolution of 7ppb.

Specifications

Number of digits: 32

Sampling rate (second) : 4k

Input number: 2

Input type: differential

Data interface: 3-Wire sequence, SPI

Configuration: MUX-PGA-ADC

Ratio -S /H:ADC: 1:1

Number of A/D converters: 1

Architecture: Integration triangle

Reference type: external

Voltage - supply, simulation: 3V ~ 5.25V

Voltage - power supply, digital: 2.7V ~ 3.6V

Features: -

Operating temperature: -40°C to 85°C

Package/case: 32-VFQFN bare pad

Supplier device Package: 32-VQFN (5x5)

Mounting type: surface mount type

Basic product number: ADS1285

 Applications

• Energy exploration

• Passive seismic monitoring

• Earth sciences and geology

• Precision instrumentation

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