DataSheet26.com

SA58640 PDF даташит

Спецификация SA58640 изготовлена ​​​​«NXP Semiconductors» и имеет функцию, называемую «Low-voltage mixer FM IF system».

Детали детали

Номер произв SA58640
Описание Low-voltage mixer FM IF system
Производители NXP Semiconductors
логотип NXP Semiconductors логотип 

16 Pages
scroll

No Preview Available !

SA58640 Даташит, Описание, Даташиты
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









No Preview Available !

SA58640 Даташит, Описание, Даташиты
Philips Semiconductors
SA58640
Low-voltagewwmwix.DeartFaSMheIeFt4sUy.csotemm
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
20 19 18 17 16 15 14 13 12 11
mixer
IF amp
RSSI
OSCILLATOR
limiter
quad
EB
VREG
audio
1 2 3 4 5 6 7 8 9 10
Fig 1. Block diagram
002aab125
7. Pinning information
7.1 Pinning
RF IN+ 1
RF INDECOUPLING 2
OSCOUT
OSCIN
RSSI OUT
3
4
5
VCC 6
AUDIO FEEDBACK 7
AUDIO OUT 8
RSSI FEEDBACK 9
QUADRATURE IN 10
Fig 2. Pin configuration
SA58640DK
20 MIXER OUT
19 IF AMP DECOUPLING
18 IF AMP IN
17 IF AMP DECOUPLING
16 IF AMP OUT
15 GND
14 LIMITER IN
13 LIMITER DECOUPLING
12 LIMITER DECOUPLING
11 LIMITER OUT
002aab134
9397 750 14161
Objective data sheet
Rev. 01 — 1 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
2 of 16









No Preview Available !

SA58640 Даташит, Описание, Даташиты
Philips Semiconductors
SA58640
Low-voltagewwmwix.DeartFaSMheIeFt4sUy.csotemm
7.2 Pin description
Table 2: Pin description
Symbol
Pin
RF IN+
1
RF IN DECOUPLING 2
OSCOUT
OSCIN
RSSI OUT
3
4
5
VCC
AUDIO FEEDBACK
6
7
AUDIO OUT
8
RSSI FEEDBACK
9
QUADRATURE IN
10
LIMITER OUT
11
LIMITER DECOUPLING 12
LIMITER DECOUPLING 13
LIMITER IN
14
GND
15
IF AMP OUT
16
IF AMP DECOUPLING 17
IF AMP IN
18
IF AMP DECOUPLING 19
MIXER OUT
20
Description
positive RF mixer input
negative RF mixer input, decoupling
oscillator output (emitter)
oscillator input (base)
RSSI amplifier output
positive supply
audio amplifier negative input, feedback
audio amplifier output
RSSI amplifier negative input, feedback
quadrature detector input
limiter amplifier output
limiter decoupling
limiter decoupling
limiter amplifier input
ground
IF amplifier output
IF amplifier decoupling
IF amplifier input
IF amplifier decoupling
mixer output
8. Functional description
The SA58640 is an IF signal processing system suitable for second IF systems with input
frequency as high as 100 MHz. The bandwidth of the IF amplifier and limiter is at least
2 MHz with 90 dB of gain. The gain/bandwidth distribution is optimized for 455 kHz,
1.5 k: source applications. The overall system is well-suited to battery operation as well
as and high quality products of all types.
The input stage is a Gilbert cell mixer with oscillator. Typical mixer characteristics include
a noise figure of 7.0 dB, conversion gain of 17 dB, and input third-order intercept of
10 dBm. The oscillator will operate in excess of 100 MHz in LC tank configurations.
Hartley or Colpitts circuits can be used up to 100 MHz for XTAL configurations.
The output impedance of the mixer is a 1.5 k: resistor permitting direct connection to a
455 kHz ceramic filter. The input resistance of the limiting IF amplifiers is also 1.5 k:. With
most 455 kHz ceramic filters and many crystal filters, no impedance matching network is
necessary. The IF amplifier has 44 dB of gain and 5.5 MHz bandwidth. The IF limiter has
58 dB of gain and 4.5 MHz bandwidth. To achieve optimum linearity of the log signal
strength indicator, there must be a 12 dB(V)1 insertion loss between the first and second
IF stages. If the IF filter or interstage network does not cause 12 dB(V) insertion loss, a
1. dB(V) = 20log Vo/Vi.
9397 750 14161
Objective data sheet
Rev. 01 — 1 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
3 of 16










Скачать PDF:

[ SA58640.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
SA58640Low-voltage mixer FM IF systemNXP Semiconductors
NXP Semiconductors
SA58641High performance mixer FM IF systemNXP Semiconductors
NXP Semiconductors
SA58643Single Pole Double Throw SwitchNXP Semiconductors
NXP Semiconductors
SA58646UHF 900MHz transceiver ICNXP Semiconductors
NXP Semiconductors

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск