AFE7903 datasheet(13/152 Pages) TI

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6.4 Transmitter Electrical Characteristics (continued)

Typical values at TA = +25°C, full temperature range is TA,MIN = -40°C to TJ,MAX = +110°C; TX Input Rate = 491.52MSPS

below 6GHz and 500MSPS above 6GHz, fDAC = 11796.48MSPS below 6GHz and 9GSPS above 6GHz; PLL clock mode

below 6GHz and External clock mode above 6GHz; interleave mode for 1st Nyquist, non-interleave mix mode for 2nd

Nyquist, nominal power supplies; 1 tone at -1 dBFS; DSA Attenuation =0dB; TX clock dither enabled, unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

NSDdBFS

Noise Spectral Density 20MHz offset

Fout =4.9 GHz

Atten=0dB, fDAC = 11796.48MSPS,

Pout=-13dBFs

-154.6

dBFS/

Atten=20dB, fDAC = 11796.48MSPS,

Pout=-13dBFs

-147.0

dBFS/

Atten=28dB, fDAC = 11796.48MSPS,

Pout=-13dBFs

-140.7

dBFS/

Atten=39dB, fDAC = 11796.48MSPS,

Pout=-13dBFs

-129.9

dBFS/

S22

Output Return Loss, +/- fc * 10%

with matching

-12

Isolation

Far Channel:

2TXOUT to 4TXOUT

fout = 10 MHz, fDAC =6000MSPS,

straight mode(2)

-104

fout = 30 MHz, fDAC = 6000MSPS,

straight mode(2)

-100

fout = 100 MHz, fDAC = 6000MSPS,

straight mode(2)

-105

fout = 400 MH, fDAC = 6000MSPS,

straight mode(3)

-97

fout = 900 MHz, fDAC = 8847.36MSPS,

straight mode

-90

fout = 1850 MHz, fDAC =

8847.36MSPS, straight mode

-91

fout = 2600 MHz, fDAC =

8847.36MSPS, straight mode

-93

fout = 3500 MHz, fDAC =

8847.36MSPS, straight mode

-94

fout= 4900 MHz, fDAC =

8847.36MSPS, straight mode

-83.2

PNTXADD

Additive Phase Noise External Clock

Mode (4)

fout = 3.7GHz, fOFFSET = 100Hz

-97

dBc/Hz

fout = 3.7GHz, fOFFSET = 1kHz

-106

dBc/Hz

fout = 3.7GHz, fOFFSET = 10kHz

-117

dBc/Hz

fout = 3.7GHz, fOFFSET = 100kHz

-128

dBc/Hz

fout = 3.7GHz, fOFFSET = 1MHz

-138

dBc/Hz

fout = 3.7GHz, fOFFSET = 10MHz

-144

dBc/Hz

(1)

After DSA calibration procedure

(2)

measured with 1µH DC feed inductor

(3)

measured with 0.39µH DC feed inductor

(4)

Input clock phase noise subtracted.

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AFE7903

SBASAK2 – MARCH 2022

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