AD7175-2 Series

24-Bit, 250 kSPS, Sigma-Delta ADC with 20 µs Settling and True Rail-to-Rail Buffers

Catalog

24-Bit, 250 kSPS, Sigma-Delta ADC with 20 µs Settling and True Rail-to-Rail Buffers

Part	Number of Bits	Input Range	Sampling Rate (Per Second)	Supplied Contents	Data Interface	Number of A/D Converters	Power (Typ) @ Conditions	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Input Type	Package / Case	Package / Case	Configuration	Architecture	Mounting Type	Reference Type	Supplier Device Package	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Features	Operating Temperature [Min]	Operating Temperature [Max]	Number of Inputs	Utilized IC / Part	Number of Inputs
Analog Devices EVAL-AD7175-8SDZ	24	±VREF	250 k	Board(s) Power Supply	Parallel	1	105 mW
Analog Devices AD7175-2BRUZ	24		250 k		DSP SPI	1		5.5 V	2 V	Differential Pseudo-Differential Single Ended	24-TSSOP	0.173 in 4.4 mm	MUX-ADC	Sigma-Delta	Surface Mount	External Internal	24-TSSOP	5.5 V	2 V	Temperature Sensor	-40 °C	105 ░C	2 4
Analog Devices AD7175-2BRUZ-RL7	24		250 k		DSP SPI	1		5.5 V	2 V	Differential Pseudo-Differential Single Ended	24-TSSOP	0.173 in 4.4 mm	MUX-ADC	Sigma-Delta	Surface Mount	External Internal	24-TSSOP	5.5 V	2 V	Temperature Sensor	-40 °C	105 ░C	2 4
Analog Devices EVAL-AD7175-2SDZ	24	±VREF	250 k	Board(s) Power Supply	DSP SPI	1	105 mW																	AD7175-2
Analog Devices AD7175-8BCPZ-RL7	24		250 k		DSP SPI	1		5.5 V	2 V	Differential Pseudo-Differential Single Ended	40-WFQFN Exposed Pad CSP		MUX-ADC	Sigma-Delta	Surface Mount	External Internal	40-LFCSP-WQ (6x6)	5.5 V	2 V	Temperature Sensor	-40 °C	105 ░C			16 8
Analog Devices AD7175-8BCPZ	24		250 k		DSP SPI	1		5.5 V	2 V	Differential Pseudo-Differential Single Ended	40-WFQFN Exposed Pad CSP		MUX-ADC	Sigma-Delta	Surface Mount	External Internal	40-LFCSP-WQ (6x6)	5.5 V	2 V	Temperature Sensor	-40 °C	105 ░C			16 8
Analog Devices AD7175-8BCPZ-RL	24		250 k		DSP SPI	1		5.5 V	2 V	Differential Pseudo-Differential Single Ended	40-WFQFN Exposed Pad CSP		MUX-ADC	Sigma-Delta	Surface Mount	External Internal	40-LFCSP-WQ (6x6)	5.5 V	2 V	Temperature Sensor	-40 °C	105 ░C			16 8

Catalog

24-Bit, 250 kSPS, Sigma-Delta ADC with 20 µs Settling and True Rail-to-Rail Buffers

Key Features

• Fast and flexible output rate: 5 SPS to 250 kSPS

• Channel scan data rate of 50 kSPS/channel (20 µs settling)

• Performance specifications17.2 noise free bits at 250 kSPS20 noise free bits at 2.5 kSPS24 noise free bits at 20 SPSINL: ±1 ppm of FSR

• 17.2 noise free bits at 250 kSPS

• 20 noise free bits at 2.5 kSPS

• 24 noise free bits at 20 SPS

• INL: ±1 ppm of FSR

• 85 dB rejection of 50 Hz and 60 Hz with 50 ms settling

• User configurable input channels2 fully differential channels or 4 single-ended channelsCrosspoint multiplexer

• 2 fully differential channels or 4 single-ended channels

• Crosspoint multiplexer

• On-chip 2.5 V reference (±2 ppm/°C drift)

• True rail-to-rail analog and reference input buffers

• Internal or external clock

• Power supply: AVDD1 = 5 V, AVDD2 = IOVDD = 2 V to 5 VSplit supply with AVDD1/AVSS at ±2.5 V

• Split supply with AVDD1/AVSS at ±2.5 V

• ADC current: 8.4 mA

• Temperature range: −40°C to +105°C

• 3- or 4-wire serial digital interface (Schmitt trigger on SCLK)Serial port interface (SPI), QSPI, MICROWIRE, and DSP compatible

• Serial port interface (SPI), QSPI, MICROWIRE, and DSP compatible

Description

The AD7175-8 is a low noise, fast settling, multiplexed, 8-/16- channel (fully/pseudo differential) Σ-Δ analog-to-digital converter (ADC) for low bandwidth inputs. It has a maximum channel scan rate of 50 kSPS (20 µs) for fully settled data. The output data rates range from 5 SPS to 250 kSPS.The AD7175-8 integrates key analog and digital signal condition-ing blocks to allow users to configure an individual setup for each analog input channel in use. Each feature can be user selected on a per channel basis. Integrated true rail-to-rail buffers on the analog inputs and external reference inputs provide easy to drive high impedance inputs. The precision 2.5 V low drift (2 ppm/°C) band gap internal reference (with output reference buffer) adds embedded functionality to reduce external component count.The digital filter allows simultaneous 50 Hz and 60 Hz rejection at a 27.27 SPS output data rate. The user can switch between different filter options according to the demands of each channel in the application. The ADC automatically switches through each selected channel. Further digital processing functions include offset and gain calibration registers, configurable on a per channel basis.The device operates with a 5 V AVDD1 . AVSS supply, or with ±2.5 V AVDD1/AVSS, and 2.5 V to 5 V AVDD2 and IOVDD supplies. The specified operating temperature range is .40°C to +105°C. The AD7175-8 is available in a 40-lead LFCSP package.APPLICATIONSProcess control: PLC/DCS modulesTemperature and pressure measurementMedical and scientific multichannel instrumentationChromatography