AD9642BCPZRL7-250

Analog To Digital Converters (ADC) Overview

The AD9642BCPZRL7-250 is a 14-bit, high-speed analog-to-digital converter (ADC) from Analog Devices Inc., operating at a maximum sampling rate of 250 MSPS. It features a multistage differential pipelined architecture with integrated output error correction logic and an internal voltage reference. The device supports flexible analog input ranges from 1.4 V p-p to 2.0 V p-p and includes an ADC clock duty cycle stabilizer. It operates on single 1.8 V analog and digital supplies, consuming 390 mW at full speed. Data outputs are provided via DDR LVDS compliant with ANSI-644 levels. The component is housed in a 32-lead LFCSP package and is specified over the industrial temperature range of −40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Multistage differential pipelined architecture with integrated output error correction logic for high linearity.
• Integrated 1.8 V analog and digital power supply requirements simplify system design.
• Built-in ADC clock duty cycle stabilizer maintains performance despite clock variations.
• Flexible analog input range accommodates various signal amplitudes without external scaling.

Analog To Digital Converters (ADC) Applications

• Communications systems including TD-SCDMA, WiMAX, WCDMA, CDMA2000, GSM, EDGE, and LTE.
• Diversity radio systems and smart antenna configurations.
• Multimode digital receivers for 3G infrastructure.
• 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 ordering suffix RL7 against the manufacturer's current documentation to confirm reel packaging and tape-and-reel specifications. Ensure the selected speed grade matches the required sampling rate for the target application. Cross-reference the part number with official distributor catalogs to confirm availability and compliance with regional regulatory standards such as RoHS.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 14-bit resolution and 250 MSPS sampling rate are required for wideband signal acquisition. Consider the internal reference and duty cycle stabilizer if minimizing external components is a priority. Evaluate the LVDS output interface compatibility with downstream FPGA or DSP devices. Verify that the 32-lead LFCSP package dimensions fit within the available PCB real estate constraints.

Analog To Digital Converters (ADC) Part Context

The AD9642 belongs to a family of high-speed ADCs designed for communications infrastructure. It shares pin compatibility with the AD9634 and AD6672, facilitating migration between different resolution and speed grades. The device addresses the need for small size and low cost in multi-standard cellular base stations and portable instrumentation.

Analog To Digital Converters (ADC) Replacement Considerations

The AD9642BCPZRL7-210 offers identical functionality but operates at a maximum sampling rate of 210 MSPS. The AD9642BCPZRL7-170 provides a 170 MSPS option. These variants maintain pin compatibility and architectural similarities, allowing for potential substitution if lower bandwidth requirements exist.

Analog To Digital Converters (ADC) FAQ

What is the function of the DCO pin?

The DCO (Data Clock Output) pins provide an LVDS clock signal derived from the input clock, synchronized with the data output for use by downstream receivers.

How does the device handle clock duty cycle variations?

An integrated ADC clock duty cycle stabilizer (DCS) compensates for variations in the input clock duty cycle, ensuring consistent performance across different clock sources.

What is the pipeline latency of the AD9642?

The device has a fixed pipeline delay (latency) of 10 cycles from the input clock edge to the corresponding data output.