Product Summary

The AD9857AST integrates a high-speed direct-digital synthesizer(DDS), a high-performance, high-speed 14-bit digital-to-analog converter (DAC), clock multiplier circuitry, digital filters, and other DSP functions onto a single chip, to form a complete quadrature digital upconverter device. The AD9857AST is intended to function as a universal I/Q modulator and agile upconverter, single-tone DDS, or interpolating DAC for communications applications, where cost, size, power dissipation, and dynamic performance are critical attributes. The AD9857AST offers enhanced performance over the industrystandard AD9856, as well as providing additional features. The AD9857AST is available in a space-saving surface-mount package and is specified to operate over the extended industrial temperature range of –40℃ to +85℃.

Parametrics

AD9857AST maximum junction temperature: (1)150℃; (2)VS: 4 V; (3)Digital Input Voltage: –0.7 V to +VS; (4)Digital Output Current: 5 mA; (5)Storage Temperature: –65℃ to +150℃; (6)Operating Temperature: –40℃ to +85℃; (7)Lead Temperature (Soldering 10 sec): 300℃; (8)θJA: 35℃/W; (9)θJC: 16℃/W.

Features

AD9857AST features: (1)200 MHz Internal Clock Rate; (2)14-Bit Data Path; (3)Excellent Dynamic Performance, 80 dB SFDR @ 65 MHz (±100 kHz) AOUT; (4)4x–20x Programmable Reference Clock Multiplier; (5)Reference Clock Multiplier PLL Lock Detect Indicator; (6)Internal 32-Bit Quadrature DDS; (7)FSK Capability; (8)8-Bit Output Amplitude Control; (9)Single-Pin Power-Down Function; (10)Four Programmable, Pin-Selectable Signal "Profiles"; (11)SIN(x)/x Correction (Inverse SINC Function); (12)Simplified Control Interface, 10 MHz Serial, 2- or 3-Wire SPI-Compatible; (13)3.3 V Single Supply; (14)Single-Ended or Differential Input Reference Clock; (15)80-Lead LQFP Surface-Mount Packaging; (16)Three Modes of Operation.

Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
AD9857AST
AD9857AST
Analog Devices Inc
IC QUADRATURE DGTL UPCONV 80LQFP
Data Sheet
Negotiable 
AD9857ASTZ
AD9857ASTZ

IC QUADRATURE DGTL UPCONV 80LQFP
Data Sheet
0-1: $20.18
1-10: $18.67
10-100: $15.95
100-250: $14.63
250-500: $13.93
500-1000: $13.46