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AD7328BRUZ-REEL7

ADI 8-channel 12-bit ADC, 1MSPS, plus/minus 10V input range, SPI, TSSOP-20

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Manufacturer Part：

AD7328BRUZ-REEL7

Package：

TSSOP-20 (RU suffix, 6.5mm x 4.4mm)

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Description

Product Overview

The AD7328BRUZ-REEL7 from Analog Devices is an 8-channel, 12-bit successive approximation ADC with a 1MSPS throughput rate. It features software-configurable analog input ranges (plus/minus 10V, plus/minus 5V, plus/minus 2.5V, 0~10V) and a serial SPI-compatible interface, making it ideal for industrial data acquisition systems that require wide dynamic range and high channel density.

Key Specifications

Resolution 12-bit
Channels 8 (single-ended or pseudo-differential pairs)
Throughput Rate 1MSPS
Input Ranges plus/minus 10V, plus/minus 5V, plus/minus 2.5V, 0~10V (software selectable)
Supply Voltages AVCC=+12V, DVCC=+5V, VCC=+5V, VSS=-12V
Power Consumption 85mW max @ 1MSPS
Interface SPI/QSPI/MICROWIRE, up to 50MHz SCLK
SNR 71dB typical (Fin=100kHz, plus/minus 10V range)
Operating Temperature -40C ~ +85C
Package TSSOP-20

Features

  • 8 analog input channels with individual range configuration
  • Software-programmable input ranges eliminate external attenuators
  • On-chip 2.5V reference with external reference option
  • Sequencer mode for automatic channel scanning
    • Input overvoltage protection to plus/minus 16.5V
  • SPI-compatible serial interface up to 50MHz

Applications

  • Industrial automation and process control
  • Multi-channel data acquisition systems
  • Medical instrumentation and patient monitoring
  • Power line monitoring and energy metering
  • Automotive test equipment

The AD7328BRUZ-REEL7 from Analog Devices is an 8-channel, 12-bit successive approximation analog-to-digital converter capable of 1MSPS throughput. Each of the eight analog input channels can be individually configured for single-ended or pseudo-differential operation, with software-selectable input ranges of plus/minus 10V, plus/minus 5V, plus/minus 2.5V, or 0 to 10V. This flexibility eliminates the need for external signal conditioning amplifiers and attenuators in many industrial applications. The device operates from a combination of supply rails: AVCC=+12V and VSS=-12V for the analog section, with DVCC=+5V and VCC=+5V for the digital section. An on-chip 2.5V reference is provided, or an external reference can be used for higher accuracy. The SPI-compatible serial interface supports clock rates up to 50MHz, enabling fast data transfer to the host MCU or FPGA.

The AD7328BRUZ-REEL7 uses a successive approximation register (SAR) architecture with a capacitive DAC. The conversion process begins when the CS# pin is asserted and the write register is loaded via the DIN line. The selected input channel is sampled on the internal hold capacitor, and the SAR performs a binary search over 12 clock cycles to determine the digital output code. In sequencer mode, the device automatically steps through a programmable sequence of channels, eliminating the need for the host to write a new channel address for each conversion. The input range for each channel is independently programmable through the control register, allowing the same device to measure both high-voltage industrial signals and low-voltage sensor outputs. Input overvoltage protection clamps the analog inputs to plus/minus 16.5V regardless of the supply voltage state.

Pin Name Function
1 VCC Logic Supply +5V
2 CS# Chip Select (active low)
3 DIN Serial Data Input
4 DOUT Serial Data Output
5 SCLK Serial Clock Input
6 AGND Analog Ground
7 REFIN/REFOUT Reference Input/Output
8 VSS Negative Analog Supply -12V
9 AVCC Positive Analog Supply +12V
10~17 AIN0~AIN7 Analog Input Channels 0~7
18 DGND Digital Ground
19 BUSY Busy Output
20 DVCC Digital Supply +5V
  • Industrial data acquisition: Simultaneously monitor 8 process variables (4-20mA, 0-10V) with per-channel range configuration
  • Power monitoring: Measure AC mains voltage and current on multiple phases with plus/minus 10V input range
  • Medical instrumentation: Acquire ECG, EMG, and other physiological signals with programmable gain per channel
  • Automotive test: Capture multiple sensor signals in engine management and chassis control test systems
  • Laboratory instruments: Build multi-channel oscilloscope or data logger front-ends with 1MSPS throughput
Model Brand Channels Resolution Rate
AD7327BRUZ ADI 8 10-bit 1MSPS
AD7606BSTZ ADI 8 16-bit 200kSPS
MCP3208-CI/SL Microchip 8 12-bit 100kSPS
ADS7828E TI 8 12-bit 50kSPS
MAX11612EEE+ ADI 8 12-bit 300kSPS
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Service & Packaging

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Contact Information

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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