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PDF SA58640 Data sheet ( Hoja de datos )
| Número de pieza | SA58640 | |
| Descripción | Low-voltage mixer FM IF system | |
| Fabricantes | NXP Semiconductors | |
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SA58640
Low-voltage mixer FM IF system
Rev. 01 — 1 November 2004
www.DataSheet4U.com
Objective 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 opamps. The SA58640 is available in a 20-pin
SSOP.
3. Features
■ 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
■ XTAL oscillator effective to 100 MHz (LC oscillator or external oscillator can be used at
higher frequencies)
■ 102 dB of IF amp/limiter gain
■ 2 MHz IF amp/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 opamp
■ RSSI output internal opamp
■ Internal opamps with rail-to-rail outputs
■ ESD protection: Human body model 2 kV; robot model 200 V
4. Applications
■ Cordless phones
1 page  
Philips Semiconductors
SA58640
Low-voltagewwmwix.DeartaFSMheIeFt4sUy.csotemm
9. Limiting values
Table 3: Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
Conditions
Min
VCC
Tstg
Tamb
single supply voltage
storage temperature range
operating ambient
temperature range
-
65
40
Zth thermal impedance
-
Max Unit
7V
150 qC
85 qC
117 qC/W
10. Static characteristics
Table 4: Static characteristics
Tamb = 25 qC; VCC = +5 V, unless otherwise stated. [1]
Symbol Parameter
Conditions
Min Typ Max Unit
VCC power supply
voltage range
4.5 -
6.0 V
ICC DC current drain
- 5.0 6.0 mA
:[1] RF frequency = 45 MHz; +14.5 dBV RF input step-up; IF frequency = 455 kHz; R17 = 2.4 k and
: R18 = 3.3 k ; RF level = 45 dBm; FM modulation = 1 kHz with ± 5 kHz peak deviation. Audio output with
de-emphasis filter and C-message weighted filter. See Figure 3 “45 MHz application circuit” on page 7. The
parameters listed above 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 improve many of the listed parameters.
9397 750 14161
Objective data sheet
Rev. 01 — 1 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
5 of 16
5 Page 
Philips Semiconductors
SA58640
Low-voltagewwmwix.DeartFaSMheIeFt4sUy.csotemm
300
mVRMS
250
VCC = 7 V
002aab133
200
5V
150
100
−55 −35 −15 5
25 45 65 85 105 125
t (°C)
Fig 9. Audio output vs. temperature and supply voltage
9397 750 14161
Objective data sheet
Rev. 01 — 1 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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