The CM2274 is a 16-bit, four-channel, synchronous sampling, high-speed successive approximation analog-to-digital converter (ADC). It operates with a 3.3V power supply and supports a maximum sampling rate of up to 4 MSPS. Its differential analog inputs support a wide common-mode input voltage range, and sampling and conversion are triggered on the falling edge of the chip select signal.
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Overview
The CM2274 is a 16-bit, four-channel, synchronous sampling, high-speed, successive approximation analog-to-digital converter (ADC). It operates with a 3.3V power supply and supports a maximum sampling rate of up to 4 MSPS. Its differential analog inputs support a wide common-mode input voltage range, and sampling and conversion are triggered by the falling edge of the chip select signal.
The CM2274 integrates an on-chip oversampling module, which effectively extends the dynamic range and reduces input noise in low-bandwidth applications. When the oversampling feature is enabled, it can be configured for 18-bit high-precision mode. The voltage range for the reference input pin is 2.5V to 3.3V.
The conversion process and data acquisition are managed via a standardized control interface, facilitating easy interfacing with microprocessors or digital signal processors. The conversion results support two output modes: 1-wire serial output mode (suitable for low-speed applications) or 4-wire synchronous output mode (suitable for high sampling rate applications). The CM2274 supports independent logic supply interfaces of 1.8V, 2.5V, and 3.3V, offering excellent interface compatibility.
The CM2274 is available in a QFN24 package and operates in a temperature range of −40°C to 125°C.
Features
Four-channel synchronous sampling
Fully differential analog inputs
High sampling rate: 4 MSPS
Signal-to-Noise Ratio (SNR): Typical value of 91.5 dB (VREF = 3.3V)
Integral Nonlinearity (INL): Maximum of 2 LSB
On-chip oversampling
Supports 18-bit high-precision mode
Over-threshold alert indication
High-speed serial interface
QFN24 4mm × 4mm package
Applications
Motor control position feedback
Motor control current detection
Data acquisition systems
EDFA (Erbium-Doped Fiber Amplifier) applications
In-phase and quadrature demodulation
Architecture Block Diagram
Pin configuration
| Mark | Dimensions(mm) | ||
| Min | Typ | Max | |
| A | 0.5 | 0.55 | 0.6 |
| A1 | -0.004 | - | 0.0005 |
| A2 | - | 0.44 | - |
| A3 | 0.11(REF) | ||
| b | 0.2 | 0.25 | 0.3 |
| D | 4.00(BSC) | ||
| E | 4.00(BSC) | ||
| e | 0.50(BSC) | ||
| D2 | 0.4 | 0.5 | 0.6 |
| E2 | 0.4 | 0.5 | 0.6 |
| L | 0.25 | 0.35 | 0.45 |
| L1 | 0.05(REF) | ||
| K | 1.35(REF) | ||
| aaa | 0.1 | ||
| ccc | 0.1 | ||
| eee | 0.08 | ||
| bbb | 0.1 | ||
| ddd | 0.05 | ||
| ff | 0.1 | ||
Appearance dimensions
Application Cases of CM2220 in Industrial and Process Control
| 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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