ADS125H01 Series

24-bit, 40-kSPS, 1-ch delta-sigma ADC with low-noise PGA and ±20-V input

Catalog

24-bit, 40-kSPS, 1-ch delta-sigma ADC with low-noise PGA and ±20-V input

Part	Ratio - S/H:ADC	Features	Number of Bits	Reference Type	Architecture	Number of Inputs	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Sampling Rate (Per Second)	Mounting Type	Package / Case	Number of A/D Converters	Configuration	Input Type	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Data Interface	Supplier Device Package
Texas Instruments ADS125H01IRHBR	0:1	Internal Oscillator PGA	24	External	Sigma-Delta	1	5.25 V	2.7 V	40k	Surface Mount	32-VFQFN Exposed Pad	1	PGA-ADC	Differential Single Ended	-18 V 4.75 V 5 V 10 V	5.25 V 36 V	125 °C	-40 °C	Serial SPI	32-VQFN (5x5)

Catalog

24-bit, 40-kSPS, 1-ch delta-sigma ADC with low-noise PGA and ±20-V input

Key Features

• ±20-V input, 24-bit delta-sigma ADCProgrammable data rate: 2.5 SPS to 40 kSPSHigh-voltage, 1-GΩ input impedance PGA:Differential input range: up to ±20 VAbsolute input range: up to ±15.5 VProgrammable attenuation and gain:0.125 to 128High-performance ADC:Noise: 45 nVRMS(gain = 128, 20 SPS)CMRR: 105 dB50-Hz and 60-Hz rejection: 95 dBOffset drift: 10 nV/°CGain drift: 1 ppm/°CINL: 2 ppmIntegrated features and diagnostics:Internal oscillatorSignal and reference voltage monitorsCyclic redundancy check (CRC)Power supplies:AVDD: 4.75 V to 5.25 VDVDD: 2.7 V to 5.25 VHVDD: ±5 V to ±18 VOperating temperature: –40°C to +125°C5-mm × 5-mm VQFN package±20-V input, 24-bit delta-sigma ADCProgrammable data rate: 2.5 SPS to 40 kSPSHigh-voltage, 1-GΩ input impedance PGA:Differential input range: up to ±20 VAbsolute input range: up to ±15.5 VProgrammable attenuation and gain:0.125 to 128High-performance ADC:Noise: 45 nVRMS(gain = 128, 20 SPS)CMRR: 105 dB50-Hz and 60-Hz rejection: 95 dBOffset drift: 10 nV/°CGain drift: 1 ppm/°CINL: 2 ppmIntegrated features and diagnostics:Internal oscillatorSignal and reference voltage monitorsCyclic redundancy check (CRC)Power supplies:AVDD: 4.75 V to 5.25 VDVDD: 2.7 V to 5.25 VHVDD: ±5 V to ±18 VOperating temperature: –40°C to +125°C5-mm × 5-mm VQFN package

Description

The ADS125H01 is a ±20-V input, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC). The ADC features a low-noise programmable gain amplifier (PGA), a clock oscillator, and signal or reference out-of-range monitors. The integration of a wide input range, ±18-V supply PGA and an ADC into a single package reduces board area up to 50% compared to discrete solutions. Programmable attenuation and gain of 0.125 to 128 (corresponding to an equivalent input range from ±20 V to ±20 mV) eliminates the need for an external attenuator or external gain stages. A 1-GΩ minimum input impedance reduces error resulting from sensor loading. Additionally, the low-noise and low-drift performance allow direct connections to strain-gauge bridge and thermocouple sensors that are affected by high common-mode voltage. The digital filter is programmable over a wide range from 2.5 SPS to 40 kSPS. Attenuation of 50-Hz and 60-Hz line cycle noise for data rates ≤ 50 SPS or 60 SPS reduces measurement error. In most data rates, the filter provides no-latency conversion data for high data throughput during external channel sequencing. The ADS125H01 is housed in a 5-mm × 5-mm VQFN package and is fully specified over the –40°C to +125°C temperature range. The ADS125H01 is a ±20-V input, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC). The ADC features a low-noise programmable gain amplifier (PGA), a clock oscillator, and signal or reference out-of-range monitors. The integration of a wide input range, ±18-V supply PGA and an ADC into a single package reduces board area up to 50% compared to discrete solutions. Programmable attenuation and gain of 0.125 to 128 (corresponding to an equivalent input range from ±20 V to ±20 mV) eliminates the need for an external attenuator or external gain stages. A 1-GΩ minimum input impedance reduces error resulting from sensor loading. Additionally, the low-noise and low-drift performance allow direct connections to strain-gauge bridge and thermocouple sensors that are affected by high common-mode voltage. The digital filter is programmable over a wide range from 2.5 SPS to 40 kSPS. Attenuation of 50-Hz and 60-Hz line cycle noise for data rates ≤ 50 SPS or 60 SPS reduces measurement error. In most data rates, the filter provides no-latency conversion data for high data throughput during external channel sequencing. The ADS125H01 is housed in a 5-mm × 5-mm VQFN package and is fully specified over the –40°C to +125°C temperature range.