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AD7609BSTZ

8-ch 18-bit 200kSPS DAS, +/-10V/5V bipolar inputs, simultaneous sampling, parallel/SPI in LQFP-64

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Manufacturer Part：

AD7609BSTZ

Package：

LQFP-64 (10.00 x 10.00 x 1.40 mm)

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Description

Product Overview

The AD7609BSTZ from Analog Devices is an 8-channel, 18-bit data acquisition system (DAS) with true bipolar inputs in an LQFP-64 (10x10mm) package. It provides simultaneous sampling of all 8 channels at 200kSPS with programmable input ranges of +/-10V or +/-5V, making it ideal for power quality monitoring and industrial data acquisition.

Key Specifications

Channels 8 (True Bipolar, Simultaneous Sampling)
Resolution 18-bit
Sampling Rate 200kSPS (all channels)
Input Range +/-10V or +/-5V (Programmable)
Input Overvoltage Protection +/-16.5V
Supply Voltage 5V (Analog), 3.3V/2.5V (Digital)
Power Consumption 1W (Typical)
Interface Parallel / SPI (Selectable)
Internal Reference Yes (2.5V)
Package LQFP-64 (10x10mm)
Operating Temperature -40°C ~ +85°C

Features

  • Simultaneous sampling of 8 channels preserves phase relationships
  • True bipolar +/-10V or +/-5V input range with software-selectable ranges
  • +/-16.5V overvoltage protection on all analog inputs
  • 18-bit resolution with no missing codes guaranteed
  • Dual interface: parallel and serial (SPI) for flexible connectivity
  • Internal 2.5V reference with option for external reference
  • Hardware oversampling with on-chip digital filter (up to 64x)

Applications

  • Power quality monitoring and metering
  • Multi-channel industrial data acquisition
  • Protective relay systems
  • Motor drive feedback
  • Vibration and acoustic analysis

The AD7609BSTZ from Analog Devices is a high-performance, 8-channel, 18-bit data acquisition system designed for applications requiring simultaneous multi-channel sampling with high dynamic range. All 8 channels are sampled simultaneously at 200kSPS, preserving the phase relationships critical for power quality analysis and multi-axis vibration measurement. The true bipolar input range of +/-10V or +/-5V is software-selectable, eliminating the need for external signal conditioning for typical industrial voltage ranges. The +/-16.5V overvoltage protection on all inputs provides robustness in harsh industrial environments. The device supports both parallel and SPI interfaces for flexible connectivity to various host processors. An internal 2.5V reference simplifies design, while the on-chip oversampling digital filter improves SNR for applications requiring higher precision.

The AD7609 uses a successive approximation ADC architecture with 8 independent track-and-hold amplifiers that sample all channels simultaneously on the CONVST rising edge. Each channel has its own analog input buffer, track-and-hold, and SAR ADC. The converted data is stored in channel data registers. The parallel interface provides fast data readback (18-bit bus), while the SPI interface reduces pin count for processor-constrained designs. The input range is selected via the RANGE pin or software register. In +/-10V mode, the input attenuator scales the signal for the internal 5V ADC range. In +/-5V mode, the attenuator is bypassed for improved SNR. The hardware oversampling mode accumulates and averages multiple conversion results internally, improving effective resolution by up to 3 bits at 64x oversampling while reducing throughput proportionally.

Pin Name Function
1-4 V1-V4 Analog input channels 1-4
5-8 V5-V8 Analog input channels 5-8
9-10 CONVST A/B Conversion start for channels 1-4/5-8
11 CS Chip select (active low)
12 RD Read strobe (active low)
13 RANGE Input range select (+/-10V or +/-5V)
14 RESET Reset input (active low)
15 BUSY Busy output (conversion in progress)
16 FRSTDATA First data indicator output
17-34 DB0-DB17 Parallel data bus (18-bit)
35-40 SER/PAR, SCLK, etc. Interface mode and SPI signals
41-48 VDD, VSS, etc. Power and ground
  • Power Quality Analyzer: Simultaneous 8-channel sampling captures 3-phase voltage and current with phase accuracy for IEC 61000-4-30 compliance
  • Protective Relay System: +/-16.5V overvoltage protection and 18-bit resolution detect fault conditions in substation monitoring
  • Motor Drive Feedback: Captures motor current and voltage waveforms across 8 channels for vector control and harmonics analysis
  • Vibration Analysis: 200kSPS simultaneous sampling of accelerometers for machine health monitoring and predictive maintenance
Model Manufacturer Key Difference
AD7606C-18 ADI 8-ch, 18-bit, 200kSPS, extended range to +/-10V on single 5V
AD7606BSTZ ADI 8-ch, 16-bit, 200kSPS, lower cost
LTC2348CLX-18 ADI 8-ch, 18-bit, 200kSPS, differential inputs
MCP3914 Microchip 8-ch, 24-bit, delta-sigma, 32kSPS
ADS8588S TI 8-ch, 16-bit, 200kSPS, +/-10V bipolar
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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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