Datasheet

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73M1866B/73M1966B Data Sheet DS_1x66B_001

24 Rev. 1.6

3.8 Transmit Path

Table 19 list the transmit path characteristics. A pattern for a sinusoid of 1 kHz, full scale (code word of

+/- 32,767) from the 73M1x66B is forced and ACS is measured with R10=174 Ω. Unless stated

otherwise, test conditions are: ACZ=0000 (600 Ω termination), THEN=1, ATEN=1, DAA=01, TXBST=0,

sample rate=8kHz.

Table 19: Transmit Path

Parameter Test Condition Min Nom Max Units

Offset voltage

8 and 16 kHz sample rate

50% 1’s density relative to 1.4

V common mode.

– 25 – mV

Tx gain, relative to

DAA[1:0]=01

DAA=00 2.5 +3 3.5 dB

DAA=01 -0.5 0 0.5 dB

DAA=10 -4.5 -4 -3.5 dB

DAA=11 -8.5 -8 -7.5 dB

AC swing

(1 kHz sinusoid)

8 and 16 kHz sample rate

DAA=01

–

0.317

–

Vpk

DAA=00

–

0.447

–

Vpk

TXBST=1, DAA=xx

–

0.634

–

Vpk

ACZ=0001

–

0.211

–

Vpk

ACZ=0010

–

0.211

–

Vpk

ACZ=0011

–

0.200

–

Vpk

ACZ=0100

–

0.254

–

Vpk

ACZ=0101

–

0.220

–

Vpk

ACZ=0110

–

0.171

–

Vpk

ACZ=0111

–

0.194

–

Vpk

ACZ=1000

–

0.222

–

Vpk

ACZ=1001

–

0.205

–

Vpk

ACZ=1010

–

0.223

–

Vpk

ACZ=1011

–

0.313

–

Vpk

ACZ=1100

–

0.208

–

Vpk

ACZ=1101

–

0.211

–

Vpk

ACZ=1110

–

0.285

–

Vpk

ACZ=1111

–

0.235

–

Vpk

Idle noise 300 Hz – 4 kHz

–

-80

–

dBm

THD 300 Hz – 4 kHz

–

-80

–

Intermod distortion

1.0 kHz and 1.2 kHz

summed

300 Hz – 4 kHz – -85 – dB

Passband ripple

150 Hz – 3.3 kHz

-0.125

–

+0.125

Gain relative to 1 kHz

–

0.5 kHz

–

0.17

–

1.0 kHz

–

2.0 kHz

–

0.193

–

3.3 kHz

–

-0.12

–

Aliased image Fs +/- 1 kHz, relative to 1 kHz

–

-75

–