ADS1261-Q1 Texas instruments

ADS1261-Q1

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ADS1261-Q1

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Описание

The ADS1260-Q1 and ADS1261-Q1 (ADS126x-Q1) are precision, 40-kSPS, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) that include a programmable gain amplifier (PGA). The devices also include a precision voltage reference and internal fault monitors. The sensor-ready ADCs give a high-accuracy, single-chip solution for the most demanding measurements, for example, weigh scales and resistance temperature detectors (RTDs).The ADCs contain an input signal multiplexer, a low-noise PGA (with gains from 1 to 128), a 24-bit ΔΣ modulator, a precision voltage reference, and a programmable digital filter. The high-impedance PGA inputs (1 GΩ) decrease measurement error due to sensor loading. The ADS1260-Q1 supports three differential or five single-ended inputs. The ADS1261-Q1 supports five differential or ten single-ended inputs. The integrated current sources simplify the measurement of RTDs.The flexible digital filter is programmable for single-cycle settled conversions. Signal and reference monitors, a temperature sensor, and CRC data verification enhance data reliability.The ADS126x-Q1 are pin compatible devices given in a 5-mm × 5-mm VQFN package and are specified across the –40°C to +125°C temperature range.

AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C to +125°C, T_A
24-bit, high-precision ADCs
- Offset drift: 1 nV/°C
- Gain drift: 0.5 ppm/°C
- Noise: 30 nV_RMS (20 SPS, gain = 128)
- Linearity: 2 ppm
CMOS PGA gain: 1 to 128
Data rate: 2.5 SPS to 40 kSPS
2.5-V reference: 4 ppm/°C
Single-cycle settling mode
Signal and reference monitors
5-V or ±2.5-V power supply
Internal temperature sensor
Cyclic redundancy check (CRC)
Excitation current sources
Sensor burn-out current sources
Four general-purpose inputs/outputs
(ADS1261-Q1)
AC excitation for bridge sensors (ADS1261-Q1)
5-mm × 5-mm VQFN package

Resolution (Bits)	24
Sample rate (max) (ksps)	40
Number of input channels	10
Interface type	SPI
Architecture	Delta-Sigma
Input type	Differential, Single-ended
Multichannel configuration	Multiplexed
Rating	Automotive
Reference mode	External, Internal
Input voltage range (max) (V)	2.5, 5
Input voltage range (min) (V)	-2.5, 0
Features	50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor
Operating temperature range (°C)	-40 to 125
Power consumption (typ) (mW)	20
Analog supply (min) (V)	-2.5, 4.75
Analog supply voltage (max) (V)	2.5, 5.25
Digital supply (min) (V)	2.7
Digital supply (max) (V)	5.25