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AD7715ACHIPS-3
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Product Detailed Parameters
- Description：IC ADC 16BIT SIGMA-DELTA CHIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Number of Bits：16
- Sampling Rate (Per Second)：-
- Number of Inputs：1
- Input Type：Differential
- Data Interface：SPI, DSP
- Configuration：PGA-ADC
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：Sigma-Delta
- Reference Type：External
- Voltage - Supply, Analog：3V ~ 3.6V
- Voltage - Supply, Digital：3V ~ 3.6V
- Features：PGA
- Operating Temperature：-40°C ~ 85°C
- Package / Case：Die
- Supplier Device Package：Chip
- Mounting Type：Surface Mount
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Overview
The AD7715ACHIPS-3 is a 16-bit, low-power, sigma-delta analog-to-digital converter (ADC) from Analog Devices. Designed for single-channel, low-frequency measurement applications, it integrates a programmable gain amplifier (PGA), a charge-balancing ADC, and a digital filter. The device operates on a single 3 V or 5 V supply, consuming less than 450 µA at 3 V with a 1 MHz master clock. It features differential inputs, a three-wire serial interface compatible with SPI/QSPI/MICROWIRE, and offers gains of 1, 2, 32, and 128. Key specifications include ±0.0015% nonlinearity, up to 98 dB SNR, and output update rates adjustable via the digital filter notch frequency.
Feature Summary
- 16-bit resolution with no missing codes and ±0.0015% integral nonlinearity.
- Integrated programmable gain front end with selectable gains of 1, 2, 32, and 128.
- Low power consumption: <450 µA typical at 3 V; standby current <10 µA.
- On-chip digital filter with programmable notch frequencies (e.g., 50 Hz/60 Hz rejection).
Applications
- Strain gauge and pressure sensor signal conditioning.
- Thermocouple and RTD temperature measurement systems.
- Industrial process control transmitters.
- Battery-powered instrumentation requiring low power.
Procurement Notes
Verify the specific package variant (PDIP, SOIC, or TSSOP) as the base model number does not define the footprint. Confirm that the 'ACHIPS' suffix corresponds to the intended manufacturing lot or packaging format through official Analog Devices documentation before procurement.
Selection Notes
Select the AD7715-3 variant for 3 V systems or AD7715-5 for 5 V systems to ensure optimal performance within specified voltage ranges. Ensure the master clock frequency matches the required output data rate and filter notch settings. Verify that the input signal range fits within the selected PGA gain and reference voltage configuration.
Part Context
The AD7715 belongs to a family of complete analog front ends designed for precision, low-speed measurements. It replaces traditional multi-component solutions by integrating the PGA, modulator, and digital filter into a single CMOS chip, simplifying design for isolated microcontroller-based systems.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided source material.
FAQ
What are the available gain settings for the AD7715?
The AD7715 supports four programmable gain settings: 1, 2, 32, and 128.
How is the output data rate controlled?
The output update rate is determined by the master clock frequency and the digital filter's notch frequency setting, which can be programmed via the on-chip control register.
What is the maximum operating temperature for the A version?
The A version of the AD7715 has an operating temperature range of -40°C to +85°C.
