Quad 12-Bit, 170/210 MSPS, Serial Output 1.8 V A/D Converter

The AD9639 is a quad, 12-bit, 210 MSPS analog-to-digital converter (ADC) with an on-chip temperature sensor and a high speed serial interface. It is designed to support digitizing high frequency, wide dynamic range signals with an input bandwidth up to 780MHz. The output data is serialized and presented in packet format, consisting of channel-specific information, coded samples, and error code correction.

The ADC requires a single 1.8 V power supply. The input clock can be driven differentially with a sine wave, LVPECL, CMOS, or LVDS. A clock duty cycle stabilizer allows high performance at full speed with a wide range of clock duty cycles. The on-chip reference eliminates the need for external decoupling and can be adjusted by means of SPI control.

Various power-down and standby modes are supported. The ADC typically consumes 150 mW per channel with the digital link still in operation when standby operation is enabled.

Fabricated on an advanced CMOS process, the AD9639 is available in a Pb free/RoHS compliant, 72-lead LFCSP package. It is specified over the industrial temperature range of −40°C to +85°C.

Product Highlights

* Four ADCs are contained in a small, space-saving package.

* An on-chip PLL allows users to provide a single ADC sampling clock; the PLL distributes and multiplies up to produce the corresponding data rate clock.

* The JESD204 coded data rate supports up to 4.2 Gbps per channel.

* The AD9639 operates from a single 1.8 V power supply.

* Flexible synchronization schemes and programmable mode pins are available.

* An on-chip temperature sensor is included.

Applications

* Communication receivers

* Cable head end equipment/M-CMTS

* Broadband radios

* Wireless infrastructure transceivers

* Radar/mil-aero sub systems

* Test equipment

* 4 ADCs in one package* JESD204 coded serial digital outputs* On-chip temperature sensor* −95 dB channel-to-channel crosstalk* SNR: 65 dBFS with AIN = 85 MHz at 210 MSPS* SFDR: 77 dBc with AIN = 85 MHz at 210 MSPS* Excellent linearity

DNL = ±±0.28 (typical)

INL = ± ±0.7 LSB (typical)

* 780 MHz full power analog bandwidth