GENERAL DESCRIPTION

The AD6640 is a high speed, high performance, low power,

monolithic 12-bit analog-to-digital converter. All necessary

functions, including track-and-hold (T/H) and reference, are

included on-chip to provide a complete conversion solution.

The AD6640 runs on a single 5 V supply and provides CMOS

compatible digital outputs at 65 MSPS.

Specifically designed to address the needs of multichannel,

multimode receivers, the AD6640 maintains 80 dB spuriousfree dynamic range (SFDR) over a bandwidth of 25 MHz.

Noise performance is also exceptional: typical signal-to-noise

ratio is 68 dB.

The AD6640 is built on Analog Devices’ high speed complementary bipolar process (XFCB) and uses an innovative multipass

architecture. Units are packaged in a 44-lead plastic quad flatpack

(LQFP) specified from –40°C to +85°C.

FEATURES

65 MSPS Minimum Sample Rate

80 dB Spurious-Free Dynamic Range

IF Sampling to 70 MHz

710 mW Power Dissipation

Single 5 V Supply

On-Chip T/H and Reference

Twos Complement Output Format

3.3 V or 5 V CMOS Compatible Output Levels

APPLICATIONS

Cellular/PCS Base Stations

Multichannel, Multimode Receivers

GPS Anti-Jamming Receivers

Communications Receivers

Phased Array Receivers

PRODUCT HIGHLIGHTS

1. Guaranteed sample rate is 65 MSPS.

2. Fully differential analog input stage specified for frequencies

up to 70 MHz; enables IF sampling.

3. Low power dissipation: 710 mW off a single 5 V supply.

4. Digital outputs may be run on 3.3 V supply for easy interface

to digital ASICs.

5. Complete solution: reference and track-and-hold.

6. Packaged in small, surface-mount 44-lead plastic LQFP.