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NXP Semiconductors Electronic Components Datasheet

SA58640DK Datasheet

Low-voltage mixer FM-IF

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SA58640
Low-voltage mixer FM IF system
Rev. 3 — 12 April 2011
Product data sheet
1. Introduction
The SA58640 was designed for cordless telephone applications in which efficient and
economic integrated solutions are required and yet high performance is desirable.
Although the product is not targeted to meet the stringent specifications of high
performance cellular equipment, it will exceed the needs for analog cordless phones. The
minimal amount of external components and absence of any external adjustments makes
for a very economical solution.
2. General description
The SA58640 is a low-voltage monolithic FM IF system incorporating a mixer/oscillator,
two limiting intermediate frequency amplifiers, quadrature detector, logarithmic RSSI,
voltage regulator and audio and RSSI operational amplifiers. The SA58640 is available in
a 20-pin SSOP package.
3. Features and benefits
„ Low power consumption: 5.0 mA typical at 5 V
„ Mixer input to >100 MHz
„ Mixer conversion power gain of 17 dB at 45 MHz
„ Crystal oscillator effective to 100 MHz (LC oscillator or external oscillator can be used
at higher frequencies)
„ 102 dB of IF amplifier/limiter gain
„ 2 MHz IF amplifier/limiter small signal bandwidth
„ Temperature compensated logarithmic RSSI with a 70 dB dynamic range
„ Low external component count; suitable for crystal/ceramic/LC filters
„ Audio output internal op amp
„ RSSI output internal op amp
„ Internal op amps with rail-to-rail outputs
„ ESD protection: Human body model 2 kV; robot model 200 V
4. Applications
„ Cordless telephones


NXP Semiconductors Electronic Components Datasheet

SA58640DK Datasheet

Low-voltage mixer FM-IF

No Preview Available !

NXP Semiconductors
SA58640
Low-voltage mixer FM IF system
5. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
SA58640DK
SSOP20 plastic shrink small outline package; 20 leads; body width 4.4 mm
6. Block diagram
Version
SOT266-1
MIXER_OUT IF_AMP_IN IF_AMP_OUT
LIM_IN LIM_DEC
IF_AMP_DEC IF_AMP_DEC
GND
LIM_DEC LIM_OUT
20 19
18 17
16 15
14 13 12 11
mixer
IF amp
OSCILLATOR RSSI
limiter
SA58640
quad
12
E
B
3
4
VREG
5
6
audio
7
8
9
10
RF_IN_P
OSCOUT
RSSI_OUT
RF_IN_N_DEC
OSCIN
VCC
AUDIO_FB RSSI_FB
AUDIO_OUT QUAD_IN
002aab125
Fig 1. Block diagram of SA58640
SA58640
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 12 April 2011
© NXP B.V. 2011. All rights reserved.
2 of 20


Part Number SA58640DK
Description Low-voltage mixer FM-IF
Maker NXP Semiconductors
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