ELECTRICAL SPECIFICATION (continued)

Analog Interface

Symbol

Parameter

Test Conditions

Min.

Typ. Max.

Unit

Differential reference voltage output

1.18

1.25

1.32

V

Differential Input Voltage

[D3 - D4]

2.5

-50

50

mV

XMIT = 0dB

XMIT= 2dB

2.5

3.2

Differential Output DC Offset Voltage

Input code = 0000h

-50

50

mV

Input Resistance (D3, D4)

40

k

Ω

Output Resistance (D1, D2)

4

k

Ω

Load Resistance (D1, D2)

10

k

Ω

Load Capacitance (D1, D2)

20

pF

Res

Converter Resolution

See Note 2

16

Bit

DNL

Differential Non Linearity

See Note 2

-0.9

0.9

Bit

GTX

-0.5

0.5

dB

Ripple

Ripple in Band

±0.2

dB

StopB

Stop Band Attenuation

-70

dB

SNDR

Signal / Noise + Distortion at - 5dBr

XMIT = 0dB, see Note 1

XMIT = 2dB

80

74

dB

dB

DR

Dynamic Range

f = 1kHz, XMIT ATTE = 0dB, see Note 1,

Measured over the full 0 to Fs/2 with

-20dBr input and extrapoled to full scale

85

dB

GRX

Receive Gain (Rx gain set to 0 dB)

-1

0

+1

dB

PSRR

Power supply rejection ratio

40

dB

Notes : 1. These parameters are valid for transmit and receive channels.

2. This specification is guaranteed by characterization, not production testing.

3. Transmit channels measured in baseband without modulation.

31

30

D3

D4

ST75951

VCM

Figure 26

ST75951

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