TDA9898HLSLASHV3 datasheet(83/103 Pages) NXP

83 / 103 page

TDA9897_TDA9898_4

Product data sheet

Rev. 04 — 25 May 2009

83 of 103

NXP Semiconductors

TDA9897; TDA9898

Multistandard hybrid IF processing

Reference frequency

General

fref

reference frequency

[8] -4

-MHz

Reference frequency generation with crystal; pin OPTXTAL

VOPTXTAL

voltage on pin

OPTXTAL (DC)

pin open-circuit

2.3

2.6

2.9

input resistance

[2] -2

-k

Ω

Rrsn(xtal)

crystal resonance

resistance

200

Ω

Cpull

pull capacitance

[9] ---pF

Rswoff(OPTXTAL)

switch-off resistance

on pin OPTXTAL

to switch off crystal input by

external resistor wired

between pin OPTXTAL and

GND

0.22

4.7

Ω

Iswoff

switch-off current

Rswoff(OPTXTAL) = 0.22 kΩ

--5000

µA

Rswoff(OPTXTAL) = 3.3 kΩ

500

µA

Reference frequency input from external source; pin OPTXTAL

VOPTXTAL

voltage on pin

OPTXTAL (DC)

pin open-circuit

2.3

2.6

2.9

input resistance

[2] -2

-k

Ω

Vref(RMS)

RMS reference

voltage

400

output resistance

of external reference signal

source

[2] -

4.7

Ω

Cdec

decoupling

capacitance

to external reference signal

source

[2] 22

100

Reference frequency input from external source; pin FREF

VFREF

voltage on pin FREF

(DC)

pin open-circuit

2.2

2.5

2.8

input resistance

[2] 50

--k

Ω

fref

reference frequency

[8] -4

-MHz

Vref(RMS)

RMS reference

voltage

see Figure 46

150

500

output resistance

of external reference signal

source; AC-coupled

4.7

Ω

Cdec

decoupling

capacitance

to external reference signal

source

100

Table 56.

Characteristics …continued

VP =5V[1]; Tamb =25 °C; 8 MHz system; see Table 33 and Table 34; CW test input signal is used for speciﬁcation;

Vi(IF) = 10 mV (RMS); fIF = 36 MHz for low IF output of 5 MHz; IF input from 50 Ω via broadband transformer 1 : 1;

gain controlled ampliﬁer adjusted to typical speciﬁed output level; measurements taken in test circuit of Figure 51 with 4 MHz

crystal oscillator reference; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TDA9898HL/V3 Datasheet(PDF) 83 Page - NXP Semiconductors

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