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MCP3208-CI/SL

12-bit 8-ch ADC, SPI, 100ksps, 2.7-5.5V, SOIC-16, MCP3208

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Manufacturer Part：

MCP3208-CI/SL

Package：

SOIC-16 (9.9 x 7.5 x 1.75 mm)

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Description

Product Overview

The MCP3208-CI/SL from Microchip Technology is a 12-bit, 8-channel successive approximation A/D converter with SPI interface in a 16-pin SOIC package. Operating from 2.7V to 5.5V with 100ksps sampling rate, it provides accurate analog-to-digital conversion for sensor acquisition and industrial measurement.

Key Specifications

Resolution 12 bits
Channels 8 (single-ended) or 4 (differential)
Sampling Rate 100 ksps @ 5V, 50 ksps @ 2.7V
Interface SPI (compatible with MICROWIRE)
Supply Voltage 2.7V to 5.5V
DNL +/-1 LSB (max)
INL +/-2 LSB (max)
Supply Current 400 uA (typ @ 5V, active)
Standby Current 500 nA (typ)
Operating Temperature -40 to +85 C (I suffix)
Package SOIC-16 (7.5mm width)

Features

  • 12-bit resolution with +/-1 LSB DNL
  • 8 single-ended or 4 differential input channels
  • 100ksps sampling rate at 5V
  • Simple SPI interface (3-wire)
  • 2.7V to 5.5V single supply operation
  • 400uA active current, 500nA standby
  • On-chip sample and hold
  • Programmable channel configuration

Applications

  • Multi-channel sensor data acquisition
  • Industrial process monitoring
  • Medical instrumentation
  • Battery-powered data loggers

The MCP3208-CI/SL from Microchip Technology is a 12-bit 8-channel successive approximation A/D converter with SPI serial interface in a 16-pin SOIC package. The CI suffix denotes industrial temperature range (-40 to +85C), and SL denotes SOIC-16 package. It offers 8 single-ended or 4 differential input channels with 100ksps sampling rate at 5V supply. The simple 3-wire SPI interface is compatible with most microcontrollers. With only 400uA active current and 500nA standby, it is ideal for battery-powered multi-channel data acquisition systems. The MCP3204 is the 4-channel version in a 14-pin TSSOP.

The MCP3208 operates through four subsystems: (1) Input Multiplexer: An 8-channel analog multiplexer selects one of 8 single-ended or one of 4 differential input pairs based on the 3-bit channel address in the SPI command. (2) Sample and Hold: When a conversion is initiated, the selected input is sampled onto an internal hold capacitor (20pF) in approximately 1.5 clock cycles. (3) Successive Approximation: A 12-bit SAR (Successive Approximation Register) ADC performs the conversion in 12 clock cycles by binary search, comparing the held voltage against an internal DAC driven by the SAR logic. (4) SPI Interface: The conversion result is shifted out MSB-first on the DOUT pin synchronized with the CLK input, using a simple 3-wire protocol compatible with most MCU SPI peripherals.

Pin Name Type Description
1 CH0 Analog Analog input channel 0
2 CH1 Analog Analog input channel 1
3-8 CH2-CH7 Analog Analog input channels 2-7
9 DGND Power Digital ground
10 /CS Input Chip select (active low)
11 DIN Input SPI data input (channel config)
12 DOUT Output SPI data output (conversion result)
13 CLK Input SPI clock
14 AGND Power Analog ground
15 VREF Reference Voltage reference input
16 VDD Power Supply voltage (2.7-5.5V)
  • 8-channel temperature sensor acquisition with 12-bit resolution and SPI interface
  • Industrial process monitoring with 4 differential input pairs for bridge sensors
  • Battery-powered data logger with 500nA standby and 100ksps burst sampling
  • Medical instrument multi-channel biopotential measurement with 2.7V low-voltage operation
Model Manufacturer Resolution Channels Notes
MCP3204-CI/SL Microchip 12-bit 4 4-channel version
ADS7841E TI 12-bit 4 diff Touch screen controller
MAX11616ETL+ ADI 12-bit 16 More channels, I2C
AD7689BCPZ ADI 16-bit 8 Higher resolution
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