AD995PCBZ datasheet(4/38 Pages) AD

Il numero della parte	AD995PCBZ

Spiegazioni elettronici	1 GSPS Quadrature Digital Upconverter w/18-Bit IQ Data Path and 14-Bit DAC

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Produttore elettronici	AD [Analog Devices]

Homepage	http://www.analog.com

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4 / 38 page

AD9957

PRELIMINARY TECHNICAL DATA

Rev. PrF | Page 4 of 38

Parameter

Min

Typ

Max

Unit

NOISE SPECTRAL DENSITY (NSD) Continued

Eight Tone, 500KHz Tone Spacing

fout = 50 MHz

TBD

dBm / Hz

fout = 104 MHz

TBD

dBm / Hz

fout = 209 MHz

TBD

dBm / Hz

fout = 315 Mhz

TBD

dBm / Hz

fout = 403 MHz

TBD

dBm / Hz

MODULATOR CHARACTERISTICS (260MHz AOUT

Input Data: 10MS/s, QPSK, 4x Oversampled

I/Q Offset

55

65

dB

Error Vector Magnitude

0.4

1

%

Input Data: 10MS/s GMSK 4x Oversampled

I/Q Offset

TBD

dB

Error Vector Magnitude

TBD

%

Input Data: 10MS/s 256-QAM 4x Oversampled

I/Q Offset

TBD

dB

Error Vector Magnitude

TBD

%

Adjacent Channel Leakage Ratio (ACLR)

WCDMA with 3.84MHz BW, 5MHz Channel Spacing

fDAC=1GSPS, fOUT=200MHz

79

dB

fDAC=1GSPS, fOUT=400MHz

74

dB

TIMING CHARACTERISTICS

Parallel Data Bus

Maximum Frequency

250

MS/s

Minimum TxEnable Pulse Width Low

2

ns

Minimum TxEnable Pulse Width High

2

ns

Minimum Data Setup Time (TxEnable to PDClk)

4

ns

Minium Data Hold Time (PDClk rising edge to data change)

0

ns

Serial Control Bus

Maximum Frequency

25

Mbps

Minimum Clock Pulse Width Low

7

ns

Minimum Clock Pulse Width High

7

ns

Maximum Clock Rise/Fall Time

2

ns

Minimum Data Setup Time DVDD_I/O = 3.3 V

3

ns

Minimum Data Hold Time

0

ns

Maximum Data Valid Time

25

ns

Wake-Up Time2

Minimum Reset Pulse Width High

5

SYSCLK Cycles3

I/O UPDATE, PS0, PS1 to SYNCCLK Setup Time DVDD_I/O = 3.3 V

4

ns

I/O UPDATE, PS0, PS1 to SYNCCLK Hold Time

0

ns

Latency

I/O UPDATE to Frequency Change Propagation Delay

24

SYSCLK Cycles

I/O UPDATE to Phase Offset Change Propagation Delay

24

SYSCLK Cycles

I/O UPDATE to Amplitude Change Propagation Delay

16

SYSCLK Cycles

CMOS LOGIC INPUTS

Logic 1 Voltage

2.2

V

Logic 0 Voltage

0.8

V

Logic 1 Current

3

12

μA

Logic 0 Current

12

μA

Input Capacitance

2

pF

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