AD9635BCPZRL7-80

Analog To Digital Converters (ADC) Overview

The AD9635BCPZRL7-80 is a dual-channel, 12-bit analog-to-digital converter (ADC) from Analog Devices Inc., operating at a maximum conversion rate of 80 MSPS. It features a serial LVDS interface and operates on a single 1.8 V supply. The device provides an SNR of 71 dBFS and an SFDR of 93 dBc at 70 MHz. Key specifications include a 650 MHz full-power analog bandwidth, a 2 V p-p differential input voltage range, and typical DNL/INL values of −0.1/+0.2 LSB and ±0.4 LSB respectively. Total power consumption is 186 mW with DC input.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel architecture with integrated sample-and-hold circuitry for simultaneous signal acquisition.
• Serial LVDS digital output interface supporting flexible bit orientation and programmable data alignment.
• On-chip 1.0 V voltage reference and common-mode voltage generation to minimize external component count.
• Comprehensive SPI control enabling individual channel power-down, test pattern generation, and clock division.

Analog To Digital Converters (ADC) Applications

• Communications systems including GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, and TD-SCDMA.
• Diversity radio systems and multimode digital receivers.
• I/Q demodulation systems and smart antenna configurations.
• Portable medical imaging, ultrasound equipment, and handheld scope meters.
• Radar and LIDAR broadband data applications.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix RL7 indicates reel packaging when sourcing components. Confirm the -80 designation corresponds to the 80 MSPS speed grade rather than the 125 MSPS variant. Ensure compatibility with the 32-lead LFCSP footprint during procurement planning. Cross-reference the manufacturer's ordering guide for exact availability status.

Analog To Digital Converters (ADC) Selection Notes

Select this model for applications requiring high dynamic performance in a compact form factor. The 80 MSPS speed grade offers lower power consumption compared to the 125 MSPS version while maintaining identical resolution and interface characteristics. Consider the pin compatibility with the AD9645 if future upgrades to 14-bit resolution are anticipated within the same system design constraints.

Analog To Digital Converters (ADC) Part Context

This component belongs to the AD9635 family of high-speed ADCs designed for low-cost, low-power environments. It shares the same physical package and pinout as the AD9645, facilitating design flexibility. The device utilizes a pipelined architecture to achieve its specified performance metrics across the industrial temperature range.

Analog To Digital Converters (ADC) Replacement Considerations

The AD9635-125 serves as a higher-speed alternative within the same family. The AD9645 is pin-compatible but offers 14-bit resolution. Verify that any substitute maintains the 1.8 V supply requirement and LVDS output interface specifications to ensure board-level interchangeability without schematic modifications.

Analog To Digital Converters (ADC) FAQ

What is the default digital output coding format?

The default output coding format is two's complement, which can be changed to offset binary via the Data Format Select (DFS) pin or SPI configuration.

How is the analog input common-mode voltage established?

The device includes an on-chip common-mode voltage reference available at the VCM pin, which should be decoupled to ground to set the inputs to mid-supply (AVDD/2).

Does the AD9635 require an external voltage reference?

No, the AD9635 integrates a stable 1.0 V internal voltage reference, eliminating the need for external reference components in most applications.