AD9287: Quad, 8-Bit, 100 MSPS Serial LVDS 1.8 V A/D Converter

The AD9287 is a quad, 8-bit, 100 MSPS analog-to-digitalconverter (ADC) with an on-chip sample-and-hold circuit thatis designed for low cost, low power, small size, and ease of use.The product operates at a conversion rate of up to 100 MSPSand is optimized for outstanding dynamic performance and lowpower in applications where a small package size is critical.

The ADC requires a single 1.8 V power supply and LVPECL-/CMOS-/LVDS-compatible sample rate clock for full performanceoperation. No external reference or driver components arerequired for many applications.

The ADC automatically multiplies the sample rate clock for theappropriate LVDS serial data rate. A data clock (DCO) for capturing data on the output and a frame clock (FCO) forsignaling a new output byte are provided. Individual channelpower-down is supported and typically consumes less than2 mW when all channels are disabled.

The ADC contains several features designed to maximizeflexibility and minimize system cost, such as programmableclock and data alignment and programmable digital test patterngeneration. The available digital test patterns include built-indeterministic and pseudorandom patterns, along with custom userdefined test patterns entered via the serial port interface (SPI®).

The AD9287 is available in a Pb-free, 48-lead LFCSP package. It is specified over the industrial temperature range of 40°C to +85°C.

Product Highlights

1. Small Footprint. Four ADCs are contained in a small, spacesaving package; low power of 133 mW/channel at 100 MSPS.
2. Ease of Use. A data clock output (DCO) is provided thatoperates up to 400 MHz and supports double data rateoperation (DDR).
3. User Flexibility. Serial port interface (SPI) control offers a wide range of flexible features to meet specific system requirements.
4. Pin-Compatible Family. This includes the AD9219 (10-bit),AD9228 (12-bit), and AD9259 (14-bit).

Applications

• Medical imaging and nondestructive ultrasound
• Portable ultrasound and digital beam forming systems
• Quadrature radio receivers
• Diversity radio receivers
• Tape drives
• Optical networking
• Test equipment

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