AD9851BRS datasheet(2/23 Pages) AD

Part #	AD9851BRS

Description	CMOS 180 MHz DDS/DAC Synthesizer

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Manufacturer	AD [Analog Devices]

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–2–

REV. C

AD9851–SPECIFICATIONS

Test

AD9851BRS

Parameter

Temp

Level

Min

Typ

Max

Units

CLOCK INPUT CHARACTERISTICS

Frequency Range (6

× REFCLK Multiplier Disabled)

+5.0 V Supply

FULL

IV

1

180

MHz

+3.3 V Supply

FULL

IV

1

125

MHz

+2.7 V Supply

0

°C to +85°C IV

1

100

MHz

Frequency Range (6

× REFCLK Multiplier Enabled)

+5.0 V Supply

FULL

IV

5

30

MHz

+3.3 V Supply

FULL

IV

5

20.83

MHz

+2.7 V Supply

0

°C to +85°C IV

5

16.66

MHz

Input Resistance

+25

°CV

1

M

Ω

Minimum Switching Thresholds

2

Logic “1,” +5.0 V Supply

+25

°CIV

3.5

V

Logic “1,” +3.3 V Supply

+25

°CIV

2.3

V

Logic “0,” +5.0 V Supply

+25

°CIV

1.5

V

Logic “0,” +3.3 V Supply

+25

°CIV

1

V

DAC OUTPUT CHARACTERISTICS

Full-Scale Output Current

+25

°C

IV

5

10

20

mA

Gain Error

+25

°C

I

–10

10

% FS

Output Offset

+25

°CI

10

µA

Differential Nonlinearity

+25

°C

I

0.75

LSB

Integral Nonlinearity

+25

°C

I

1

LSB

Residual Phase Noise, 5.2 MHz, 1 kHz Offset

PLL On

+25

°C

V

–125

dBc/Hz

PLL Off

+25

°C

V

–132

dBc/Hz

Output Impedance

+25

°C

V

120

k

Ω

Voltage Compliance Range

+25

°C

I

–0.5

1.5

V

Wideband Spurious-Free Dynamic Range

1.1 MHz Analog Out (DC to 72 MHz)

+25

°C

IV

60

64

dBc

20.1 MHz Analog Out (DC to 72 MHz)

+25

°C

IV

51

53

dBc

40.1 MHz Analog Out (DC to 72 MHz)

+25

°C

IV

51

55

dBc

50.1 MHz Analog Out (DC to 72 MHz)

+25

°C

IV

46

53

dBc

70.1 MHz Analog Out (DC to 72 MHz)

+25

°C

IV

42

43

dBc

Narrowband Spurious-Free Dynamic Range

1.1 MHz (

±50 kHz)

+25

°C

V

85

dBc

1.1 MHz (

±200 kHz)

+25

°C

V

80

dBc

40.1 MHz (

± 50 kHz)

+25

°C

V

85

dBc

40.1 MHz (

± 200 kHz)

+25

°C

V

80

dBc

70.1 MHz (

± 50 kHz)

+25

°C

V

85

dBc

70.1 MHz (

± 200 kHz)

+25

°C

V

73

dBc

COMPARATOR INPUT CHARACTERISTICS

Input Capacitance

+25

°CV

3

pF

Input Resistance

+25

°C

IV

500

k

Ω

Input Bias Current

+25

°CI

12

µA

Input Voltage Range

+25

°CIV

0

5

V

COMPARATOR OUTPUT CHARACTERISTICS

Logic “1” Voltage +5 V Supply

+25

°C

VI

+4.8

V

Logic “1” Voltage +3.3 V Supply

+25

°C

VI

+3.1

V

Logic “1” Voltage +2.7 V Supply

+25

°C

VI

+2.3

V

Logic “0” Voltage

+25

°C

VI

+0.4

V

Continuous Output Current

+25

°CIV

20

mA

Hysteresis

+25

°CIV

10

mV

Propagation Delay

+25

°CIV

7

ns

Toggle Frequency (1 V p-p Input Sine Wave)

+25

°C

IV

200

MHz

Rise/Fall Time, 15 pF Output Load

+25

°CIV

7

ns

Output Jitter (p-p)

3

+25

°C

IV

80

ps (p-p)

CLOCK OUTPUT CHARACTERISTICS

Output Jitter (Clock Generator Configuration,

40 MHz 1 V p-p Input Sine Wave)

+25

°C

V

250

ps (p-p)

Clock Output Duty Cycle

FULL

IV

50

± 10

%

(VS

1 = +5 V

5%, RSET = 3.9 k , 6

REFCLK Multiplier Disabled, External Reference

Clock = 180 MHz except as noted)

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