Overview
The CM2209 is a 16-bit, 8-channel SAR ADC powered by a single supply.
It integrates all the circuitry required for a low-power, multi-channel data acquisition system, including: a true 16-bit SAR ADC with no missing codes, an 8-channel low crosstalk multiplexer, an internal 4.096V low drift reference voltage source and buffer, a temperature sensor, an optional single-pole filter, and a multi-channel sequencer.
The CM2209 uses the SPI interface for writing configuration registers and receiving conversion results. It employs a separate power supply (VIO) for the SPI interface, and its power consumption is proportional to the sampling rate.
The CM2209 comes in QFN20 and WLCSP20 packages and operates over an optimal temperature range of -40°C to 125°C.
Features
Single power supply: 5V
Logic interface voltage: 1.8V to 5V
-
8-channel multiplexer with selectable inputs:
Sampling rate: 250kSPS
INL: Maximum of 2.5 LSB
Dynamic range: 93dB
SNDR: 91.6dB (fIN = 1kHz)
THD: -108dB (fIN = 1kHz)
Analog input range: 0V to VREF (VREF can be as high as VDD)
Serial interface compatible with SPI/QSPI/MICROWIRE/DSP
Multiple reference source types
Internal 4.096V reference source
External buffered reference source (up to 4.096V)
External reference source (up to VDD)
Channel sequencer, optional single-pole filter, busy indicator
No pipeline delay, SAR architecture
Low power consumption: 14mW (250kSPS), 7μW (100SPS)
Available in QFN20 4mm × 4mm and WLCSP20 2.4mm × 2.4mm packages
Applications
Architecture Block Diagram
Pin configuration
Appearance dimensions
Application Case
**Application case of ADC （CM2209 ）in instrumentation**
Solution Overview
CM2209 is a 16 bit, 8-channel SAR ADC， Powered by a single power source.
CM2209 is equipped with all the necessary circuits for a multi-channel, low-power data acquisition system, including a true 16 bit SAR ADC without loss of code, an 8-channel low crosstalk multiplexer, an internal 4.096V low-temperature drift reference voltage source and buffer, a temperature sensor, an optional single pole filter, and a multi-channel sequencer.
CM2209 uses SPI interface to write configuration registers and receive conversion results. The SPI interface is powered by an independent power supply VIO, and its power consumption is proportional to the throughput rate.
CM2209, as an alternative to ADS1115, is widely used in precision instruments and displays its excellent data acquisition performance.
Product list
SAR ADC
| P/N |
Type |
Package |
MPQ(Pcs) |
Benchmarks against |
| CM2248-QFPTR |
ADC |
Tray |
1600 |
AD7606 |
| CM2249-QFPT |
ADC |
Tray |
900 |
AD7616 |
| CM2368-QFPTR |
ADC |
Tray |
1600 |
AD7606C-18 |
| CM2268-QFPTR |
ADC |
Tray |
1600 |
AD7606C-16 |
| CM2219-QFNTR |
ADC |
Tray |
4900 |
AD7699 |
| CM2209-QFNTR |
ADC |
Tray |
4900 |
AD7689 |
| CM2322-MSOTA |
ADC |
Tray |
4000 |
AD7982 |
| CM2220-MSOTA |
ADC |
Reel |
4000 |
AD7980 |
| CM2431-MSOTA |
ADC |
Tray |
4000 |
AD4020 |
| CM2272-MSOTA |
ADC |
Reel |
5000 |
ADS8354 |
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