AD9643BCPZRL7-250

Analog To Digital Converters (ADC) Overview

The AD9643BCPZRL7-250 is a dual, 14-bit analog-to-digital converter (ADC) from Analog Devices Inc., operating at sampling speeds up to 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 of 1.4 V p-p to 2.0 V p-p and utilizes LVDS outputs compliant with ANSI-644 levels. Key electrical specifications include a signal-to-noise ratio (SNR) of 70.6 dBFS at 185 MHz AIN, spurious-free dynamic range (SFDR) of 85 dBc, and total power consumption of 785 mW at maximum sample rate. It operates on single 1.8 V supplies and includes an integer 1-to-8 input clock divider.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel 14-bit ADC cores with integrated output error correction logic for high linearity.
• Built-in ADC clock duty cycle stabilizer to maintain performance despite clock variations.
• User-configurable built-in self-test (BIST) capability for system verification.
• Energy-saving power-down modes allowing significant power reduction when idle.

Analog To Digital Converters (ADC) Applications

• Multimode digital receivers 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 ordering suffix RL7 against official Analog Devices documentation to confirm reel packaging and quantity specifications. Ensure compatibility with the required speed grade (250 MSPS) and package type (LFCSP-64). Cross-reference the part number with current datasheet revisions to validate all electrical parameters and pin configurations before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring dual-channel, high-speed digitization with low power consumption. The AD9643 offers pin compatibility with the AD9613, AD6649, and AD6643, facilitating migration strategies. Consider the 1.8 V supply requirement and LVDS output interface when designing the power and digital sections. Verify that the input frequency range up to 400 MHz meets the system's intermediate frequency requirements.

Analog To Digital Converters (ADC) Part Context

The AD9643 belongs to the AD9643 series of dual 14-bit ADCs, available in 170 MSPS, 210 MSPS, and 250 MSPS variants. It is designed for communications applications where cost, size, and versatility are critical. The device is specified over the industrial temperature range of −40°C to +85°C and is housed in a 64-lead LFCSP package.

Analog To Digital Converters (ADC) Replacement Considerations

The AD9643 is pin-compatible with the AD9613, AD6649, and AD6643. When replacing these parts, verify that the resolution and speed requirements align with the application needs, as the AD9613 is a 12-bit device.