AD9779PCB datasheet(4/34 Pages) AD

4 / 34 page

AD9779

Preliminary Technical Data

Rev. PrD | Page 4 of 34

DIGITAL SPECIFICATIONS

(VDD33 = 3.3 V, VDD18 = 1.8 V, MAXIMUM SAMPLE RATE, UNLESS OTHERWISE NOTED)

Parameter

Temp

Test Level

Min

Typ

Max

Unit

Differential peak-to-peak Voltage

800

Common Mode Voltage

400

DAC CLOCK INPUT

(CLK+, CLK-)

Maximum Clock Rate

GSPS

Maximum Clock Rate (SCLK)

MHz

Maximum Pulse width high

TBD

SERIAL PERIPHERAL

INTERFACE

Maximum pulse width low

TBD

Table 2: Digital Specifications

AC SPECIFICATIONS

(VDD33 = 3.3 V, VDD18 = 1.8 V, MAXIMUM SAMPLE RATE, UNLESS OTHERWISE NOTED)

Parameter

Temp

Test Level

Min

Typ

Max

Unit

Output Settling Time (tst) (to 0.025%)

TBD

Output Rise Time (10% to 90%)

TBD

Output Fall Time (90% to 10%)

TBD

DYNAMIC

PERFORMANCE

Output Noise (IoutFS=20mA)

TBD

pA/rtHz

fDAC = 100 MSPS, fOUT = 20 MHz

dBc

fDAC = 200 MSPS, fOUT = 50 MHz

dBc

fDAC = 400 MSPS, fOUT = 70 MHz

dBc

SPURIOUS FREE

DYNAMIC RANGE

(SFDR)

fDAC = 800 MSPS, fOUT = 70 MHz

dBc

fDAC = 200 MSPS, fOUT = 50 MHz

dBc

fDAC = 400 MSPS, fOUT = 60 MHz

dBc

fDAC = 400 MSPS, fOUT = 80 MHz

dBc

TWO-TONE

INTERMODULATION

DISTORTION (IMD)

fDAC = 800 MSPS, fOUT = 100 MHz

dBc

fDAC = 156 MSPS, fOUT = 60 MHz

-158

dBm/Hz

fDAC = 200 MSPS, fOUT = 80 MHz

-157

dBm/Hz

fDAC = 312 MSPS, fOUT = 100 MHz

-159

dBm/Hz

NOISE SPECTRAL

DENSITY (NSD)

fDAC = 400 MSPS, fOUT = 100 MHz

-159

dBm/Hz

fDAC = 245.76 MSPS, fOUT = 20 MHz

dBc

fDAC = 491.52 MSPS, fOUT = 100 MHz

dBc

WCDMA ADJACENT

CHANNEL LEAKAGE

RATIO (ACLR), SINGLE

CARRIER

fDAC = 491.52 MSPS, fOUT = 200 MHz

dBc

fDAC = 245.76 MSPS, fOUT = 60 MHz

dBc

fDAC = 491.52 MSPS, fOUT = 100 MHz

dBc

WCDMA SECOND

ADJACENT CHANNEL

LEAKAGE RATIO

(ACLR), SINGLE

CARRIER

fDAC = 491.52 MSPS, fOUT = 200 MHz

dBc

Table 3: AC Specifications

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