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AD7888ARZ-REEL7

12-bit 8-channel 125kSPS SAR ADC, SPI, on-chip 2.5V ref, 2mW, SOIC-16

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Manufacturer Part：

AD7888ARZ-REEL7

Package：

SOIC-16 (10.0 x 4.0 x 1.5 mm)

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Description

Product Overview

The AD7888ARZ-REEL7 from Analog Devices is a 12-bit, 8-channel, 125 kSPS successive approximation ADC with a 2.7V to 5.25V single supply. It features an on-chip 2.5V reference, SPI-compatible serial interface, and ultra-low 2 mW power consumption, packaged in a 16-lead SOIC.

Key Specifications

Resolution 12-bit
Channels 8 (single-ended)
Throughput Rate 125 kSPS
Supply Voltage 2.7V to 5.25V
Power Dissipation (typ) 2 mW
Shutdown Current 1 µA max
SINAD (typ) 71 dB
Interface SPI/QSPI/MICROWIRE/DSP
Operating Temperature -40°C to +105°C
Package SOIC-16

Features

  • 8 single-ended analog inputs
  • On-chip 2.5V reference with external override
  • Flexible power/throughput rate management
  • Shutdown mode: 1 µA max
  • SPI/QSPI/MICROWIRE/DSP compatible serial interface
  • Conversion time: 14.5 SCLK cycles
  • Single supply operation: 2.7V to 5.25V

Applications

  • Battery-powered systems (PDAs, medical instruments)
  • Instrumentation and control systems
  • High-speed modems
  • Mobile communications
  • Data acquisition modules

The AD7888ARZ-REEL7 is a high-speed, low-power, 12-bit successive approximation analog-to-digital converter from Analog Devices. It provides 125 kSPS throughput with 8 single-ended analog inputs (AIN1-AIN8) and an analog input range of 0 to VREF. The on-chip 2.5V reference can also be overridden with an external reference (1.2V to VDD). The device consumes only 2 mW in normal operation and 3 µW in power-down mode, with a SPI/QSPI/MICROWIRE/DSP compatible serial interface.

The AD7888 operates through four subsystems: (1) Input Multiplexer: An 8-channel analog multiplexer selects one of eight single-ended inputs under control of the serial interface. (2) Sample-and-Hold: Acquires the selected input signal in 500 ns, holding it stable during conversion. (3) SAR ADC Core: A 12-bit successive approximation register converter performs the A/D conversion in 14.5 SCLK cycles (7.25µs at 2MHz clock), using a charge redistribution DAC architecture. (4) Reference and Control: An on-chip 2.5V bandgap reference provides the conversion reference, with the option to apply an external reference. Power management allows automatic power-down after conversion.

Pin Name Type Description
1 CS Input Chip select (active low)
2 REFIN/REFOUT I/O Reference input/output
3 AIN1 Analog Input Analog input channel 1
4 AIN2 Analog Input Analog input channel 2
5 AIN3 Analog Input Analog input channel 3
6 AIN4 Analog Input Analog input channel 4
7 AIN5 Analog Input Analog input channel 5
8 AIN6 Analog Input Analog input channel 6
9 GND Ground Ground
10 AIN7 Analog Input Analog input channel 7
11 AIN8 Analog Input Analog input channel 8
12 DIN Input Serial data input (control bits)
13 DOUT Output Serial data output (conversion result)
14 SCLK Input Serial clock input
15 VDD Power Supply voltage (2.7V to 5.25V)
16 AGND Ground Analog ground
  • Multi-channel data acquisition in battery-powered medical instruments
  • Industrial process monitoring with 8-channel sensor arrays
  • Portable data logging systems requiring low power consumption
  • Mobile communication baseband signal digitization
  • High-speed modem analog front-end
Model Manufacturer Resolution Rate Notes
AD7888ARUZ-REEL7 ADI 12-bit 125kSPS TSSOP-16 package
AD7091R-8 ADI 12-bit 1MSPS Higher speed option
MCP3208-CI/SL Microchip 12-bit 100kSPS Lower cost alternative
ADS7042 TI 12-bit 1MSPS Single-channel high-speed
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

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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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