Specification	ADS1285IRHBR

Architecture	Sigma-Delta
Configuration	MUX-PGA-ADC
Data Interface	SPI, 3-Wire Serial
Input Type	Differential
Mounting Type	Surface Mount
Number of A/D Converters	1
Number of Bits	32
Number of Inputs	2
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	32-VFQFN Exposed Pad
Ratio - S/H:ADC	1:1
Reference Type	External
Sampling Rate (Per Second)	4k
Supplier Device Package	32-VQFN (5x5)
Voltage - Supply, Analog [Max]	5.25 V
Voltage - Supply, Analog [Min]	3 V
Voltage - Supply, Digital [Max]	3.6 V
Voltage - Supply, Digital [Min]	2.7 V

ADS1285 Series

32-bit high-resolution two-channel delta-sigma ADC for seismic and geospace exploration

Part	Reference Type	Ratio - S/H:ADC	Operating Temperature [Max]	Operating Temperature [Min]	Sampling Rate (Per Second)	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Configuration	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Number of Bits	Data Interface	Number of Inputs	Number of A/D Converters	Supplier Device Package	Package / Case	Architecture	Mounting Type	Input Type	Input Range	Utilized IC / Part	Supplied Contents	Power (Typ) @ Conditions
Texas Instruments ADS1285IRHBR	External	1:1	85 °C	-40 °C	4k	3.6 V	2.7 V	MUX-PGA-ADC	5.25 V	3 V	32	3-Wire Serial SPI	2	1	32-VQFN (5x5)	32-VFQFN Exposed Pad	Sigma-Delta	Surface Mount	Differential
Texas Instruments ADS1285EVM-PDK					4k						32	I2C SPI		1						±VREF/gain	ADS1285	Board(s)	11.5 mW
Texas Instruments ADS1285IRHBT	External	1:1	85 °C	-40 °C	4k	3.6 V	2.7 V	MUX-PGA-ADC	5.25 V	3 V	32	3-Wire Serial SPI	2	1	32-VQFN (5x5)	32-VFQFN Exposed Pad	Sigma-Delta	Surface Mount	Differential

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	3000	$ 55.00
Texas Instruments	LARGE T&R	1	$ 67.32
		100	$ 59.84
		250	$ 49.19
		1000	$ 44.00

Description

General part information

ADS1285 Series

The ADS1285 is a 32-bit, low-power, analog-to-digital converter (ADC), with a programmable gain amplifier (PGA) and a finite impulse response (FIR) filter. The ADC is designed for the demanding needs of seismology equipment requiring low-noise precision digitization and extended battery run time.

The low-noise PGA allows direct connection of geophones and transformer-coupled hydrophones without the need of an external amplifier.

The ADC incorporates a high-resolution, delta-sigma (ΔΣ) modulator and a FIR filter with programmable phase response. The high-pass filter removes dc and low-frequency content from the signal. Clock frequency error is compensated by the sample rate converter with 7-ppb resolution.