CM3432 high-speed ADC Low power consumption, 250MSPS integrated dual-channel 14-bit

Overview
The CM3432 is a 14-bit, dual-channel, integrated pipelined Analog-to-Digital Converter (ADC) with a maximum sampling rate of 250 MSPS, designed to provide a solution for low-cost, small-size, wide-bandwidth, and versatile communication applications.

The core of the CM3432 employs a seven-stage differential pipelined architecture, integrated with digital calibration logic and output error correction logic to achieve superior SNR and SFDR performance. On the input side, this ADC supports a wide input bandwidth, offering flexible selection of the input range. On the output side, it utilizes a 14-bit LVDS parallel interface, with the two channels' data output in an interleaved or multiplexed manner. For external circuitry: it integrates a precision voltage reference and can provide an input common-mode voltage, simplifying the design of external circuits. For configuration: all functions can be easily configured via a 3-wire SPI interface.

The CM3432 utilizes proprietary technology to significantly optimize power consumption. Operating at a 250 MSPS sampling rate, its typical power consumption is only 322 mW. The chip also supports a power-down mode, where power consumption is drastically reduced to 4.9 mW.

The CM3432 is offered in a QFN64 package and operates over a temperature range of -40°C to +85°C.

Features
1.8V analog/digital supply
LVDS (ANSI-644 levels) and CMOS outputs
On-chip precision voltage reference
3-wire SPI interface
Sampling rate up to 250 MSPS

Performance
SNR: 69.4 dBFS typical (at 185 MHz)
SFDR: 80 dBc typical (at 185 MHz)
Input noise: -150 dBFS/Hz (at 185 MHz)
Channel isolation: 90 dB (at 100 MHz)
Total power consumption: 322 mW
Flexible analog input range: 1.4 Vpp to 2.0 Vpp
Maximum clock input frequency of 625 MHz, supports divide-by-1 to divide-by-8 modes
QFN64 9mm × 9mm package

Applications
Communication equipment
I/Q demodulation systems
Smart antenna systems
Ultrasound equipment
Data acquisition systems

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