ST70136

17/24

Figure 8 : Tone Detector Schematic

5.5 - VCXO

Unless otherwise noted, typical specifications apply for AVdd = 5.0V, DVdd = 3.3V, temperature = 27°C.

A voltage controlled crystal oscillator is integrated in ST70136. Its nominal frequency is 35.328MHz. The

quartz crystal is connected between XTALI and XTALO pins.

Table 11 : Tone DetectorSpecifications

Description

Minimum

Typical

Maximum

Unit

Comments

Zin listening mode

3.5

5

6.5

k

Ω

Diffferential

Zin normal mode

350

500

650

k

Ω

Diffferential

Minimum differential input signal

15

µVp

Peak to peak

Maximum diffential input signal

VDD

In listening mode

VCM input

VDD/2

In listening mode

Figure 9 : DAC VCXO Schematic

G

ACTD

All cells are supplied with VDD except ESD diodes

VDDA6

VDDA6

TOP (PAD)

TON (PAD)

(PAD)

VCXOUT

PMOS

IVCO (PAD)

ANALOG

VREF

DIGITAL

VCO<7:0>

VCOCAP(PAD)

(PAD)

(from internal

register)