AD9642BCPZ-250

Analog To Digital Converters (ADC) Overview

The AD9642BCPZ-250 is a single-channel, 14-bit analog-to-digital converter (ADC) from Analog Devices Inc., operating at a maximum sampling rate of 250 MSPS. It utilizes a multistage differential pipelined architecture with integrated output error correction logic and an internal voltage reference. The device accepts differential analog inputs with a nominal full-scale range of 1.75 V p-p and provides 14-bit parallel DDR LVDS data outputs compliant with ANSI-644 levels. Powered by a single 1.8 V supply for both analog and digital sections, it consumes 360 mW at full speed. Key performance metrics include a Signal-to-Noise Ratio (SNR) of 72.2 dBFS at 185 MHz input frequency and a Spurious-Free Dynamic Range (SFDR) of 83 dBc under the same conditions.

Analog To Digital Converters (ADC) Feature Summary

• Multistage differential pipelined ADC core with integrated output error correction logic
• Flexible analog input range supporting user-selectable spans from 1.4 V p-p to 2.0 V p-p
• Integrated duty cycle stabilizer (DCS) to maintain performance despite clock variations
• 3-wire SPI-compatible serial interface for register programming and readback

Analog To Digital Converters (ADC) Applications

• Communications infrastructure including TD-SCDMA, WiMAX, WCDMA, CDMA2000, GSM, EDGE, and LTE
• Diversity radio systems and smart antenna configurations
• I/Q demodulation systems and general-purpose software radios
• Ultrasound equipment and broadband data applications

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific speed grade suffix matches the required sampling rate, as the AD9642 family includes 170 MSPS, 210 MSPS, and 250 MSPS variants. Confirm package type is LFCSP-32 and check RoHS compliance status during sourcing. Ensure the ordering code corresponds exactly to the -250 speed bin for high-speed requirements.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-channel 14-bit resolution is required alongside high bandwidth up to 350 MHz. Consider the pin compatibility with AD9634 and AD6672 if migration from lower resolution or different architectures is planned. Evaluate power consumption against system constraints, noting the availability of standby and power-down modes for energy savings.

Analog To Digital Converters (ADC) Part Context

The AD9642 belongs to Analog Devices' portfolio of high-speed, low-power ADCs designed for communications and instrumentation. It complements dual-channel counterparts like the AD9648 and offers a compact 5 mm x 5 mm footprint. The device supports wide bandwidths and is suitable for multi-standard cellular infrastructure equipment requiring small size and cost-effectiveness.

Analog To Digital Converters (ADC) Replacement Considerations

The AD9642 is pin-compatible with the AD9634 (12-bit) and AD6672, allowing for resolution or architecture migration within the same footprint. No direct functional substitutes are listed in the provided documentation; verify compatibility with existing board layouts when considering alternatives.