AD7928BRUZ-REEL7

Overview

The AD7928BRUZ-REEL7 is an 8-channel, 12-bit successive approximation analog-to-digital converter (ADC) from Analog Devices. It operates on a single 2.7 V to 5.25 V supply with a maximum throughput rate of 1 MSPS. The device features eight single-ended inputs managed by a channel sequencer and utilizes an external reference input. Key electrical parameters include a minimum Signal-to-Noise Ratio (SNR) of 70 dB, ±1 LSB maximum Integral Nonlinearity (INL), and ±1.5 LSB maximum Differential Nonlinearity (DNL). Power consumption reaches 13.5 mW at 5 V and 6.0 mW at 3 V during operation, dropping to 0.5 μA in full shutdown mode.

Feature Summary

• Eight single-ended analog inputs with integrated channel sequencer for automated multi-point sampling
• Flexible serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards
• VDRIVE function allows independent logic voltage selection separate from analog supply
• Low power architecture with configurable shutdown modes for energy efficiency

Applications

• Industrial process control systems requiring multi-channel data acquisition
• Battery-powered instrumentation utilizing low-power SAR ADC technology
• Automotive sensor interfaces meeting specific temperature range requirements
• Data logging equipment needing high-speed sequential channel conversion

Procurement Notes

Verify the complete part number including the REEL7 suffix to confirm tape-and-reel packaging configuration. Ensure the B version designation matches the required -40°C to +85°C operating temperature range. Cross-reference the datasheet revision to confirm current specifications before finalizing procurement orders.

Selection Notes

Select this component when eight single-ended channels are required alongside a 1 MSPS sampling rate. The AD7928 is appropriate for designs needing 12-bit resolution with a 70 dB SNR. Consider the VDRIVE pin if the host processor logic voltage differs from the analog supply voltage. Verify that the external reference voltage meets the specified 2.5 V ±1% requirement for optimal performance.

Part Context

This component belongs to the AD7908/AD7918/AD7928 family of high-speed, low-power ADCs. While sharing identical pinouts and core architectures, the AD7928 specifically provides 12-bit resolution compared to the 8-bit AD7908 and 10-bit AD7918. All variants support the same 1 MSPS throughput and feature the same 20-lead TSSOP package with integrated sequencer functionality.

Replacement Considerations

The AD7927BRUZ offers similar functionality but operates at a reduced 200 kSPS throughput rate. The AD7918BRUZ provides 10-bit resolution at the same 1 MSPS speed. Verify pin compatibility and software register configurations when substituting these family members.