AD9835BRU datasheet(3/28 Pages) AD

Part #	AD9835BRU

Description	50 MHz Direct Digital Synthesizer, Waveform Generator

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Data Sheet

AD9835

Rev. A | Page 3 of 28

SPECIFICATIONS

VDD = +5 V ± 5%; AGND = DGND = 0 V; TA = TMIN to TMAX; REFIN = REFOUT; RSET = 3.9 kΩ; RLOAD = 300 Ω for IOUT, unless otherwise

noted. Also, see Figure 2.

Table 1.

Parameter1

Min

Typ

Max

Units

Test Conditions/Comments

SIGNAL DAC SPECIFICATIONS

Resolution

10

Bits

Update Rate (fMAX)

50

MSPS

IOUT Full Scale

4

mA

4.75

mA

Output Compliance

1.35

V

DC Accuracy

Integral Nonlinearity

±1

LSB

Differential Nonlinearity

±0.5

LSB

DDS SPECIFICATIONS2

Dynamic Specifications

Signal-to-Noise Ratio

50

dB

fMCLK = 50 MHz, fOUT = 1 MHz

Total Harmonic Distortion

−52

dBc

fMCLK = 50 MHz, fOUT = 1 MHz

Spurious Free Dynamic Range (SFDR)3

fMCLK = 6.25 MHz, fOUT = 2.11 MHz

Narrow Band (±50 kHz)

−72

dBc

Wide Band (±2 MHz)

−50

dBc

Clock Feedthrough

−60

dBc

Wake-Up Time

1

ms

Power-Down Option

Yes

VOLTAGE REFERENCE

Internal Reference @ +25° C

1.21

V

TMIN to TMAX

1.131

1.29

V

REFIN Input Impedance

10

MΩ

Reference TC

100

ppm/°C

REFOUT Output Impedance

300

Ω

LOGIC INPUTS

VINH, Input High Voltage

DVDD − 0.9

V

VINL, Input Low Voltage

0.9

V

IINH, Input Current

10

μA

CIN, Input Capacitance

10

pF

POWER SUPPLIES

fMCLK = 50 MHz

AVDD

4.75

5.25

V min/V max

DVDD

4.75

5.25

V min/V max

IAA

5

mA max

IDD

2.5 +

0.33/MHz

mA typ

IAA + IDD4

40

mA max

Low Power Sleep Mode

0.35

mA max

1 Operating temperature range is as follows: B Version: −40°C to +85°C.

2 100% production tested.

3 fMCLK = 6.25 MHz, Frequency Word = 5671C71C HEX, fOUT = 2.11 MHz.

4 Measured with the digital inputs static and equal to 0 V or DVDD. The AD9835 is tested with a capacitive load of 50 pF. The part can be operated with higher capacitive

loads, but the magnitude of the analog output will be attenuated. See Figure 7.

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