ST7540 datasheet(12/44 Pages) STMICROELECTRONICS

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Electrical characteristics

ST7540

12/44

HD2

PA_OUT

Second harmonic

distortion on PA_OUT

VPA_OUT = 5.6VPP ,

VCC = 12V

RLOAD = 30Ω

Carrier frequency:

86KHz

Figure 3

-63

dBc

HD3

PA_OUT

Third harmonic

distortion on PA_OUT

VPA_OUT = 5.6VPP ,

VCC = 12V

RLOAD = 30Ω

Carrier frequency:

86KHz

Figure 3

- 63

dBc

Receiver

VIN

Input sensitivity

(Normal Mode)

0.5

mVrms

Input sensitivity

(High Sens.)

250

µV

rms

Input sensitivity (TxD

line forced to “1”)

VBU

dB/

µVrms

VIN

Maximum input signal

Vrms

RIN

Input impedance

100

140

Ω

VCD

Carrier detection

sensitivity

(Normal Mode)

0.5

mVrms

Carrier detection

sensitivity

(High Sensitivity Mode)

250

µV

rms

Carrier detection

sensitivity

(TxD forced to “1”)

VBU

dB/

µVrms

VBU

Band in Use Detection

Level

83.5

dB/

µVrms

Table 5. Electrical characteristics (continued)

( VDD = +5V, VCC =+9 V, VSS = SVSS = GND = 0V,-40°C ≤TA ≤85°C, TJ < 125°C,

unless otherwise specified)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

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