SA614A

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Product data sheet

Rev. 4 — 14 February 2014

7 of 28

NXP Semiconductors

SA614A

Low power FM IF system

11. Dynamic characteristics

[1]

SA614A data sheets refer to power at 50

 input termination; about 21 dB less power actually enters the internal 1.5 k input.

SA614A (50

) - SA614A (1.5 k)/SA615 (1.5 k)

97 dBm - 118 dBm

47 dBm - 68 dBm

+3 dBm -

18 dBm

The SA615 and SA614A are both derived from the same basic die. The SA615 performance plots are directly applicable to the SA614A.

Table 6.

Dynamic characteristics

with

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 will improves many of the listed

parameters.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

input limiting

3 dB

test at pin IF_AMP_INPUT: per 50



-

92

-

dBm

AM rejection

80 % AM 1 kHz

25

33

-

dB

recovered audio level

15 nF de-emphasis

60

175

260

150 pF de-emphasis

-

530

-

THD

total harmonic distortion

30

42

-

dB

S/N

signal-to-noise ratio

no modulation for noise

-

68

-

dB

RSSI output

RF level =

118 dBm

[1] 0160

800

mV

RF level =

68 dBm

[1] 1.7

2.50

3.3

V

RF level =

18 dBm

[1] 3.6

4.80

5.8

V

RSSI range

-

80

-

dB

RSSI accuracy

-

2.0

-

dB

input impedance

IF

1.4

1.6

-

k



output impedance

IF

0.85

1.0

-

k



Z

limiter input impedance

1.4

1.6

-

k



output resistance

unmuted audio

-

58

-

k



muted audio

58

-

k

