AD9744 datasheet(5/32 Pages) AD

Part #	AD9744

Description	14-Bit, 210 MSPS TxDAC짰 D/A Converter

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Manufacturer	AD [Analog Devices]

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AD9744

Rev. B | Page 5 of 32

Parameter

Min

Typ

Max

Unit

Multitone Power Ratio (8 Tones at 400 kHz Spacing)

fCLOCK = 78 MSPS; fOUT = 15.0 MHz to 18.2 MHz

0 dBFS Output

66

dBc

−6 dBFS Output

68

dBc

−12 dBFS Output

62

dBc

−18 dBFS Output

61

dBc

1 Measured single-ended into 50 Ω load.

2 Output noise is measured with a full-scale output set to 20 mA with no conversion activity. It is a measure of the thermal noise only.

3 Noise spectral density is the average noise power normalized to a 1 Hz bandwidth, with the DAC converting and producing an output tone.

DIGITAL SPECIFICATIONS

TMIN to TMAX, AVDD = 3.3 V, DVDD = 3.3 V, CLKVDD = 3.3 V, IOUTFS = 20 mA, unless otherwise noted.

Table 3.

Parameter

Min

Typ

Max

Unit

DIGITAL INPUTS1

Logic 1 Voltage

2.1

3

V

Logic 0 Voltage

0

0.9

V

Logic 1 Current

−10

+10

µA

Logic 0 Current

−10

+10

µA

Input Capacitance

5

pF

Input Setup Time (tS)

2.0

ns

Input Hold Time (tH)

1.5

ns

Latch Pulse Width (tLPW)

1.5

ns

CLK INPUTS2

Input Voltage Range

0

3

V

Common-Mode Voltage

0.75

1.5

2.25

V

Differential Voltage

0.5

1.5

V

1 Includes CLOCK pin on SOIC/TSSOP packages and CLK+ pin on LFCSP package in single-ended clock input mode.

2 Applicable to CLK+ and CLK– inputs when configured for differential or PECL clock input mode.

0.1%

tS

tH

tPD

DB0–DB13

CLOCK

IOUTA

OR

IOUTB

tLPW

tST

Figure 2. Timing Diagram

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