ST7538Q datasheet(11/44 Pages) STMICROELECTRONICS

11 / 44 page

ST7538Q

Electrical characteristics

11/44

HD2ATO

Second Harmonic

Distortion on ATO

VATO = 2VPP

-55

-42

dBc

HD3ATO

Third Harmonic Distortion

on ATO

-52

-49

dBc

IATOP

Output Transmitting

Current in programmable

current limiting

Rcl = 1.85k

Ω; RLOAD =

Ω (as in Figure 14)

250

310

370

mArms

VATOP(AC)

Max Carrier Output AC

Voltage for each ATOP1

and ATOP2 pins

RCL = 1.t5kΩ

Vsense(AC) = 0V

3.5

4.6

Vpp

VATOP(DC)

Output DC Voltage on

ATOP1 and ATOP2 pins

3.5

4.2

HD2ATOP

Second Harmonic

Distortion on each ATOP1

and ATOP2 pins

VATOP = 4VPP ,

PAVCC = 10V

No Load

-55

-42

dBc

VATOP = 4VPP ,

PAVCC = 10V

RLOAD =50Ω (Differential)

Carrier Frequency:

132.5KHz

-65

-53

dBc

HD3ATOP

Third Harmonic Distortion

on each ATOP1 and

ATOP2 pins

VATOP = 4VPP ,

PAVCC = 10V

No Load.

-56

-49

dBc

VATOP = 4VPP ,

PAVCC = 10V

RLOAD =50Ω (Differential)

Carrier Frequency:

132.5KHz

-65

-52

dBc

VATOP

Accuracy with Voltage

Control Loop Active

RCL = 1.75Ω;

Vsense(AC) = 0V

-1

GST

ALC Gain Step Control

loop gain step

0.6

1.4

DRNG

ALC Dynamic Range

VsenseTH

Voltage control loop

reference threshold on

Vsense pin

Figure 14

160

180

200

mVPK

VsenseHYS

Hysteresis on Voltage loop

reference threshold

Figure 14

±18

VSENSE(DC)

Output DC Voltage on

VSENSE

1.865

VSENSE

VSENSE Input Impedance

Ω

Table 4. Electrical characteristics (continued)

(AVdd = DVdd = +5V, PAVcc =+9 V, PAVss, SGND = DVss = 0V, -40°C

≤TA ≤ 85°C, TJ < 125 °C, fc = 86kHz,

other control register parameters as default value, unless otherwise specified)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

PAVcc

VATOP AC

()

------------------------------------

7.5V

≥

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