Overview
The CM2220 is a 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) powered by a single supply. It integrates a low-power, high-speed, 16-bit sampling ADC and a versatile serial interface. On the rising edge of CNV, the CM2220 samples the voltage difference between the IN+ and IN− pins, with an input voltage range from 0 V to VREF. The reference voltage VREF is provided externally and can be independent of the supply voltage VDD. Power consumption is directly proportional to the sampling rate.
Using the SDI input pin of the SPI interface, multiple ADCs can be connected in a daisy-chain configuration, with an optional busy indication available. With a separate VIO supply, the device is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic levels.
The CM2220 is available in MSOP10 and DFN10 packages, and its optimal operating temperature range is −40°C to 125°C.
Features
Single-supply operation: 1.8 V
Logic interface voltage: 1.8 V, 2.5 V, 3 V, 5 V
Pseudo-differential analog input range: 0 V to VREF (VREF = 2.5 V to 5 V)
16-bit resolution, no missing codes
Sampling rate: 1 MSPS
Performance
INL: ±0.6 LSB typical (VREF = 5 V)
Dynamic range: 92 dB (VREF = 5 V)
SNR: 91.5 dB (fIN = 1 kHz, VREF = 5 V)
SNDR: 91 dB (fIN = 1 kHz, VREF = 5 V)
THD: −115 dB (fIN = 1 kHz, VREF = 5 V)
Serial Interface
Power Consumption
3.5 mW (1 MSPS, VDD only)
5.2 mW (1 MSPS, total power)
50 μW (10 kSPS, total power)
Packages
MSOP10 3 mm × 3 mm
DFN10 3 mm × 3 mm
Applications
Instrumentation
Automated test equipment
High-precision data acquisition cards
Medical instruments
Industrial automation equipment
Analog signal acquisition
Architecture Block Diagram
Pin configuration
Appearance dimensions
Application Cases of CM2220 in Industrial and Process Control
CM2220 is widely used in industrial and process control due to its technological advantages of high-speed data transmission speed and high precision.
As the best alternative to AD7980, CM2220 has a high cost performance ratio.
The typical application circuit when using multiple power sources is as follows:
CM2220 is a high-speed, low-power, single power supply, precision 16 bit SAR ADC.
The maximum conversion rate of CM2220 can reach 1MSPS, and the chip is turned off between two conversions. When operating at a rate of 10kSPS, the typical power consumption is 50 μ W, making it an ideal choice for battery powered applications.
CM2220 provides users with on-chip sample and hold circuits without any pipeline delay, making it very suitable for multi-channel multiplexing applications.
CM2220 can be connected to any 1.8V to 5V digital logic interface, providing MSOP10 and DFN10 packaging, saving space and flexible configuration.
The pins of CM2220 are fully compatible with those of CM2322.
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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