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AD7718BR-REEL
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Product Detailed Parameters
- Description：IC ADC 24BIT SIGMA-DELTA 28SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Number of Bits：24
- Sampling Rate (Per Second)：1.37k
- Number of Inputs：4/5, 8/10
- Input Type：Differential, Pseudo-Differential
- Data Interface：SPI, DSP
- Configuration：MUX-PGA-ADC
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：Sigma-Delta
- Reference Type：External
- Voltage - Supply, Analog：2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital：2.7V ~ 3.6V, 5V
- Features：PGA
- Operating Temperature：-40°C ~ 85°C
- Package / Case：28-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：28-SOIC
- Mounting Type：Surface Mount
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Overview
The AD7718BR-REEL is a complete analog front-end featuring a 24-bit Sigma-Delta ADC with an integrated programmable gain amplifier. It supports 4/5 fully-differential or 8/10 pseudo-differential input channels and operates on a single 3 V or 5 V supply. The device utilizes a 32 kHz crystal with an internal PLL, offering software-programmable output data rates up to 1.365 kS/s. Key electrical specifications include a maximum integral nonlinearity of ±10 ppm of FSR, simultaneous 50 Hz and 60 Hz rejection, and a typical power consumption of 1.28 mA at 3 V.
Feature Summary
- Factory-calibrated architecture ensuring high accuracy without external calibration components.
- Integrated rail-to-rail input buffer and programmable gain amplifier for direct transducer interfacing.
- VREF Select capability enabling both absolute and ratiometric measurement configurations.
- Configurable operation mode optimizing either analog performance via chopper stabilization or channel throughput.
Applications
- Industrial process control systems
- Pressure transducers
- Portable instrumentation
- Smart transmitters
Procurement Notes
Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing this specific variant. Confirm the B grade designation matches required precision levels. Ensure the SOIC package option aligns with PCB layout constraints. Cross-reference the manufacturer's current lifecycle status as older revisions may be discontinued.
Selection Notes
Select the AD7718BR-REEL when 24-bit resolution and multi-channel multiplexing are required. Compare against the AD7708 if 16-bit resolution suffices for lower cost. Consider the BRU variant if TSSOP packaging is preferred over SOIC. Evaluate power requirements against the 3 V versus 5 V operational modes specified in the datasheet.
Part Context
This component belongs to the AD7708/AD7718 family of low-frequency measurement analog front-ends. The AD7718 serves as the 24-bit resolution counterpart to the 16-bit AD7708. Both devices share pin compatibility, allowing for design upgrades from 16 to 24 bits without hardware modifications.
Replacement Considerations
The AD7718BRU is the TSSOP package equivalent of the AD7718BR. The AD7708BR offers identical functionality with reduced 16-bit resolution. Verify pinout compatibility before substituting these variants in existing designs.
