MCP3208-CI/SL
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Mfr | Microchip Technology |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Input Type | Pseudo-Differential, Single Ended |
| Configuration | MUX-S/H-ADC |
| Supplier Device Package | 16-SOIC |
| Number of Inputs | 4, 8 |
| Number of Bits | 12 |
| Number of A/D Converters | 1 |
| Architecture | SAR |
| Reference Type | External |
| Data Interface | SPI |
| Sampling Rate (Per Second) | 100k |
| Voltage - Supply, Analog | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V |
| Ratio - S/H:ADC | 1:1 |
| Features | - |
| Package | Tube |
| Product Status | Active |
| Base Product Number | MCP3208 |
| REACH Status | REACH Unaffected |
| Standard Package | 50 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
MCP3208-CI/SL 12 Bit Analog to Digital Converter 1 SAR 16-SOIC
The MCP3208-CI/SL is an 8-channel, 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) from Microchip Technology, housed in a 16-SOIC package. It features a built-in sample-and-hold circuit and communicates via a simple SPI-compatible serial interface, supporting clock rates up to 2 MHz. Operating from a wide supply voltage range of 2.7V to 5.5V, it offers flexible input configuration, allowing each channel to be programmed as either single-ended or pseudo-differential, making it a versatile choice for multi-channel data acquisition systems.
This ADC is well-suited for converting multiple analog signals to digital data in embedded systems. Its primary applications include:
● Multi-channel sensor data acquisition in industrial process control, environmental monitoring, and data logging systems.
● Battery voltage and current monitoring in portable instruments, power management systems, and battery-backed devices.
● Interface for analog sensors such as temperature, pressure, force, and position sensors in automotive, consumer, and medical electronics.
● General-purpose analog input modules for microcontroller and microprocessor-based systems requiring moderate speed and resolution.
Frequently Asked Questions (FAQ):
Q1: What is the difference between single-ended and pseudo-differential input modes, and when should each be used?
A: In single-ended mode, each input channel is measured relative to the common (COM) pin. In pseudo-differential mode, the device measures the voltage difference between a selected IN+ channel and a common IN- channel. Single-ended mode is simpler and used when measuring voltages referenced to system ground. Pseudo-differential mode is beneficial for rejecting common-mode noise, such as when measuring sensor signals like bridge outputs or in electrically noisy environments.
Q2: What is the maximum sampling rate achievable, and what factors limit it?
A: The MCP3208 can achieve a maximum sampling rate of 100 kilosamples per second (ksps) at a 5V supply. The actual achievable rate is limited by the SPI clock frequency (max 2 MHz) and the time required for the microcontroller to read the conversion result and issue the next command.
Compatible Alternative ADC List
● MCP3208-CI/P: The same 8-channel, 12-bit SAR ADC in a 16-pin PDIP (plastic dual in-line package), suitable for through-hole prototyping and applications requiring easy manual soldering.
● MCP3204-CI/SL: A 4-channel version of the same 12-bit ADC family from Microchip, offering identical performance and interface but with half the number of input channels for cost-sensitive designs with fewer sensor inputs.
● ADS7828PB: A Texas Instruments 12-bit, 8-channel ADC with I2C interface, providing an alternative communication protocol option for systems with limited SPI pins or requiring I2C bus connectivity.
● MAX11612EEE+: A Maxim Integrated (Analog Devices) 12-bit, 8-channel ADC with an internal reference and I2C-compatible interface, offering integrated features for simplified design.
