AD9708

a FEATURES Member of Pin-Compatible TxDAC Product Family 125 MSPS Update Rate 8-Bit Resolution Linearity: 1/4 LSB DNL Linearity: 1/4 LSB INL Differential Current Outputs SINAD @ 5 MHz Output: 50 dB Power Dissipation: 175 mW @ 5 V to 45 mW @ 3 V Power-Down Mode: 20 mW @ 5 V On-Chip 1.20 V Reference Single +5 V or +3 V Supply Operation Packages: 28-Lead SOIC and 28-Lead TSSOP Edge-Triggered Latches Fast Settling: 35 ns Full-Scale Settling to 0.1% APPLICATIONS Communications Signal Reconstruction Instrumentation PRODUCT DESCRIPTION 8-Bit, 100 MSPS+ TxDAC® D/A Converter AD9708* FUNCTIONAL BLOCK DIAGRAM +5V 0.1␮F REFLO +1.20V REF 0.1␮F REF IO FS ADJ RSET +5V DVDD DCOM CLOCK SLEEP COMP1 AVDD ACOM 50pF CURRENT SOURCE ARRAY SEGMENTED SWITCHES LATCHES AD9708 COMP2 0.1␮F IOUTA IOUTB CLOCK DIGITAL DATA INPUTS (DB7–DB0) Differential current outputs are provided to support singleended or differential applications. The current outputs may be directly tied to an output resistor to provide two complementary, single-ended voltage outputs. The output voltage compliance range is 1.25 V. The AD9708 contains a 1.2 V on-chip reference and reference control amplifier, which allows the full-scale output current to be simply set by a single resistor. The AD9708 can be driven by a variety of external reference voltages. The AD9708’s full-scale current can be adjusted over a 2 mA to 20 mA range without any degradation in dynamic performance. Thus, the AD9708 may operate at reduced power leve...