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Details for AD7731BNZ by Analog Devices
Semiconductors - ICs > Data & Signal Conversion > Analog-to-Digital Converters - ADC
24BIT ADC SIGMA DELTA 7731 DIP24
AD7731BNZ image

AD7731BNZ by Analog Devices

24BIT ADC SIGMA DELTA 7731 DIP24
Features
24-Bit Sigma-Delta ADC 16 Bits p-p Resolution at 800 Hz Output Rate Programmable Output Rates up to 6.4 kHz Programmable Gain Front End 60.0015% Nonlinearity Buffered Differential Inputs Programmable Filter Cutoffs FASTStepu2122* Mode for Channel Sequencing Single Supply Operation
Part Information
AD7731BNZ image
RoHS Compliant
Description
The AD7731 is a complete analog front-end for process control applications. The device has a proprietary programmable gain front end that allows it to accept a range of input signal ranges, including low level signals, directly from a transducer. The sigma- delta architecture of the part consists of an analog modulator and a low pass programmable digital filter, allowing adjustment of filter cutoff, output rate and settling time. The part features three buffered differential programmable gain analog inputs (which can be configured as five pseudo-differential inputs), as well as a differential reference input. The part oper- ates from a single +5 V supply and accepts seven unipolar ana- log input ranges: 0 to +20 mV, +40 mV, +80 mV, +160 mV, +320 mV, +640 mV and +1.28 V, and seven bipolar ranges: ±20 mV, ±40 mV, ±80 mV, ±160 mV, ±320 mV, ±640 mV and ±1.28 V. The peak-to-peak resolution achievable directly from the part is 16 bits at an 800 Hz output rate. The part can switch between channels with 1 ms settling time and maintain a perfor- mance level of 13 bits of peak-to-peak resolution. The serial interface on the part can be configured for three-wire operation and is compatible with microcontrollers and digital signal processors. The AD7731 contains self-calibration and system calibration options and features an offset drift of less than 5 nV/°C and a gain drift of less than 2 ppm/°C. The part is available in a 24-lead plastic DIP, a 24-lead SOIC and 24-lead TSSOP package.
Specifications
Resolution (Bits):
24bit
Sampling Rate:
6.4kSPS
Input Channel Type:
Single Ended
Data Interface:
Serial SPI
Supply Voltage Type:
Single
Supply Voltage Min:
2.7V
Supply Voltage Max:
5.25V
ADC / DAC Case Style:
DIP
No. of Pins:
24Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
Triple 24-Bit Sigma-Delta ADCs
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
MSL 3 - 168 hours
SVHC:
No SVHC (07-Jul-2017)
Base Number:
7731
IC Case Style:
DIP
IC Generic Number:
7731
Linearity Error:
0.0015%
Linearity Error ADC / DAC +:
15ppm
Linearity Error ADC / DAC -:
15ppm
Logic Function Number:
7731
No. of Channels:
6Channels
Operating Temperature Range:
-40°C to +85°C
Supply Current:
10.3mA
Supply Voltage Range:
2.7V to 5.25V
Supply Voltage Range - Analogue:
4.75V to 5.25V
Supply Voltage Range - Digital:
2.7V to 5.25V
Alternate Descriptions
ADC Single Delta-Sigma 5MSPS 24-Bit RS Components
A/D Converter IC [Analog Devices] AD7731BNZ A/D Converter IC Distrelec
CONVERTER - ADC Richardson RFPD