SA605D datasheet(8/25 Pages) NXP

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SA605

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Product data sheet

Rev. 5 — 14 November 2014

8 of 25

NXP Semiconductors

SA605

High performance low power mixer FM IF system

[1]

The generator source impedance is 50

, but the SA605 input impedance at pin 18 (IF_AMP_IN) is 1500 . As a result, IF level refers

to the actual signal that enters the SA605 input (pin 8, MUTED_AUD_OUTP) which is about 21 dB less than the ‘available power’ at the

generator.

RF/IF section (internal LO)

unmuted audio level

RMS value; VCC =4.5 V;

RF level =

27 dBm

-450

-mV

Vo(RSSI)

RSSI output voltage

system; VCC =4.5 V;

RF level =

27 dBm

-4.3

-V

Table 7.

Dynamic characteristics …continued

Tamb =25 C; VCC = +6 V; unless specified otherwise. RF frequency = 45 MHz + 14.5 dBV RF input step-up.

IF frequency = 455 kHz; R17 = 5.1 k

; RF level = 45 dBm; FM modulation = 1 kHz with 8 kHz peak deviation.

Audio output with C-message weighted filter and de-emphasis capacitor. Test circuit Figure 7. The parameters listed below

are tested using automatic test equipment to assure consistent electrical characteristics. The limits do not represent the

ultimate performance limits of the device. Use of an optimized RF layout improves many of the listed parameters.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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