View U4286BM_62683.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

TELEFUNKEN Semiconductors
U4286BM
AM / FM-PLL
Description
The U4286BM is an integrated circuit in BICMOS technology for frequency synthesizer. It performs all the functions of a PLL radio tuning system and is controlled by I2C bus. The device is designed for all frequency synthesizer applications of radio receivers, as well as RDS ( Radio Data System ) applications.
Features
D Reference oscillator up to 15 MHz D Two programmable 16 bit dividers
adjustable from 2 to 65535
D Two programmable switching outputs (open drain up
to 20 V)
D Fine tuning steps: AM
y 1 kHz FM y 2 kHz
D Few external component requirements due to
integrated loop-transistor for AM/FM
D High signal/ noise ratio
Block Diagram
SWO 1 OSCIN OSCOUT 14 Oscillator 15 2 3 4 7 Latch I2C-BUS Interface
Shift register
SWO 2 6
5 R-Divider
Switching outputs
Latch Status 11 Phase detector
Preamplifier
SCL SDA AS FMOSC
Latch Current sources :2 AM/FM switch 8 GND 2
PDFM PDAM PDFMO PDAMO
12
AMOSC
9
Preamplifier
N-Divider 1 VDD
Figure 1.
10 Analogue outputs 13 16 GND 1
93 7581 e
Rev. A1: 19.08.1996
Preliminary Information
1 (9)
U4286BM
Pin Description
VDD SCL 1 2 3 4 16 15 14 13 GND OSCOUT OSCIN PDAMO PDAM PDFM PDFMO AMOSC Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
TELEFUNKEN Semiconductors
SDA AS SWO 1 SWO 2 FMOSC GND 2
U 4286 BM
5 6 7 8
94 7908 e
12 11 10 9
Symbol VDD SCL SDA AS SWO 1 SWO 2 FMOSC GND 2 AMOSC PDFMO PDFM PDAM PDAMO OSCIN OSCOUT GND 1
Function Supply voltage I2C bus clock I2C bus data Address selection Switching output 1 Switching output 2 FM oscillator input Ground 2 (analog) AM oscillator input FM analogue output FM current output AM current output AM analogue output Oscillator input Oscillator output Ground 1 (digital)
Functional Description
The U4286BM is controlled via the 2-wire I2C bus. For programming there are one module address byte, two subaddress bytes and five data bytes. The module address contains a programmable address bit A 1 which with address select input AS (Pin 4) makes it possible to operate two U4286BM-B in one system. If bit A 1 is identical with the status of the address select input AS, the chip is selected . The subaddress determines which one of the data bytes is transmitted first. If subaddress of R - divider is transmitted, the sequence of the next data bytes is DB 0 (Status), DB 1 and DB 2. If subaddress of N - divider is transmitted, the sequence of the next data bytes is DB 3 and DB 4. The bit organisation of the module address, subaddress and 5 data bytes are shown in figure 2. Each transmission on the I2C bus begins with the "START"- condition and has to be ended by the "STOP"condition (see figure 3). The integrated circuit U4286BM has two separate inputs for AM and FM oscillator. Pre-amplified AM signal is directed to the 16 bit N-divider via AM/ FM switch, whereas (pre-amplified) FM signal is first divided by a fixed prescaler ( :2 ). AM/ FM switch is controlled by software. Tuning steps can be selected by 16 bit R-divider. Further there is a digital memory phase detector. There are two separate current sources for AM and FM amplifier (charge pump) as given in electrical characteristics. It allows independent adjustment of gain, whereby providing high current for high speed tuning and low current for stable tuning.
2 (9)
Preliminary Information
Rev. A1: 19.08.1996
TELEFUNKEN Semiconductors
U4286BM
1 A6 0 A5 0 A4 1 A3 0 A2 0/1 A1 LSB 0 A0
Bit Organisation
Module address MSB 1 A7
Subaddress (R-divider)
X
X
X
X
0
1
X
X
Subaddress (N-divider)
X
X
X
X
1
1
X
X
Data byte 0 (Status)
MSB X D7
SWO1 D6
SWO2 D5
X D4
AM/ FM D3
PD ANA D2
PD POL D1
LSB PD CUR D0
Data byte 1
215
R-divider
28
Data byte 2
27
R-divider
20
Data byte 3
215
N-divider
28
Data byte 4
27
N-divider
20
AM/FM PD - ANA PD - POL PD - CUR
LOW FM-operation PD analogue Negative polarity Output current 2
HIGH AM-operation TEST Positive polarity Output current 1
Figure 2.
Rev. A1: 19.08.1996
Preliminary Information
3 (9)
U4286BM
Transmission protocol
S MSB Address A7 LSB A A0 Subaddress R-divider A Data 0 A
TELEFUNKEN Semiconductors
Data 1
A
Data 2
A
P
MSB S A7 Address
LSB A A0 Subaddress N-divider A Data 3 A Data 4 A A P
S = Start
P = Stop
A = Acknowledge
Figure 3.
Absolute Maximum Ratings
Parameters Supply voltage Pin 1 Input voltage Pin 2, 3, 4, 7, 9, 14, 15 Output current Pin 3, 5, 6 Output drain voltage Pin 5, 6 Output voltage Pin 10, 13 Output current Pin 10, 13 Ambient temperature range Storage temperature range Junction temperature Electrostatic handling (MIL Standard 883C) Symbol VDD VI IO VOD VAO IAO Tamb Tstg Tj
ESD
"V
Value -0 to +6 -0.3 to VDD + 0.3 -1 to +5 20 15 -1 to +20 -25 to +85 -40 to +125 125 2000
Unit V V mA V V mA _C _C _C V
Thermal Resistance
Parameters Junction ambient Symbol RthJA Value 160 Unit K/W
4 (9)
Preliminary Information
Rev. A1: 19.08.1996
TELEFUNKEN Semiconductors
U4286BM
Symbol VDD IDD VSFM VSFM VSAM VSOSC 25 50 25 100 Min. 4.5 Typ. 5.0 6.0 Max. 5.5 11.6 Unit V mA mV mV mV mV
Electrical Characteristics
VDD = 5 V, Tamb = 25C, unless otherwise specified Parameters Test Conditions / Pins Supply voltage Pin 1 Quiescent Pin 1 supply current FM Input Sensitivity, RG = 50 W FMOSC fi = 70 to 120 MHz Pin 7 fi = 120 to 130 MHz Pin 7 AM Input Sensitivity, RG = 50 W AMOSC fi = 0.5 to 35 MHz Pin 9 Oscillator Input Sensitivity, RG = 50 W OSCIN fi = 0.1 to 15 MHz Pin 14 Switching Output SWO 1, SWO 2 (Open Drain) Output voltage Pin 5, 6 LOW IL = 1 mA IL = 0.1 mA LOW Pin 5, 6 Output leakage current V5, V6 = 20 V HIGH Phase Detector PDFM Output current 1 Pin 11 Output current 2 Pin 11 Phase Detector PDAM Output current 1 Output current 2 Analogue Output PDFMO, PDAMO Saturation voltage I = 15 mA Leakage current I2C Bus SCL, SDA, AS Input voltage HIGH LOW Output voltage Acknowledge LOW Clock frequency Rise time SDA, SCL Fall time SDA, SCL Period of SCL HIGH LOW Pin 10, 13 Pin 10, 13 Pin 2, 3, 4 Vsat ILEAK ViBUS 3.0 0 ISDA = 3 mA Pin 3 Pin 2 Pin 2, 3 Pin 2, 3 Pin 2 VO fSCL tr tf tH tL 4.0 4.7 0.4 100 1 300 V kHz VDD
1.5
VSWOL VSWOL IOHL
200 20
400 100 100
mV mV nA
Pin 12 Pin 12
"I "I "I "I
PDFM PDFM
400 100 75 20
500 125 100 25
600 150 125 30
mA mA mA mA
mV
PDAM PDAM
270
400 1
mA
V V
ms
ns
ms ms
Rev. A1: 19.08.1996
Preliminary Information
5 (9)
U4286BM
Parameters Setup Time Start condition Data Stop condition Time the bus must be free before a new transmission can be started Hold time Start condition DATA Test Conditions / Pins Symbol tsSTA tsDAT tsSTOP twSTA
TELEFUNKEN Semiconductors
Min. 4.7 250 4.7 4.7 Typ. Max. Unit
ms ms ms ms ms
ns
thSTA thDAT
4.0 0
Bus Timing
SDA
twSTA tr tf thSTA
SCL
P S thSTA tL thDAT tH tsSTA thDAT tsSTOP P
93 7671 e
P = Stop, S = Start
Figure 4.
The Following Hints are Recommended:
D C3 = 100 nF should be very close to Pin 1 (VDD) and
Pin 16 (GND 1)
D 4 MHz quartz must be very close to Pin 14 and Pin 15 D Components of the charge pump (C1/R1 for AM and
C2/R2 for FM) should be very close to Pin 12 with respect to Pin 11.
D GND 2 (Pin 8 - analog ground) and GND 1 (Pin 16 -
digital ground) must be connected according to Figure 6
6 (9)
Preliminary Information
Rev. A1: 19.08.1996
TELEFUNKEN Semiconductors
U4286BM
1k 10 k 3k 10 k 100 n AMOSC FMOSC
Application Circuit
12 V 220 220 m 16 V 1n
R1
56 k
C5 6.8 n
27 p 4 MHz 16 15
27 p
C1
220 n 13 12
R2
150 p 2.2 n 33 k
C2
10 9
14
11
C3
100 n
U 4286 BM
1 2 3 4 5 6 7 8
100 m 6.3 V 1n 27 5V
Figure 5.
C4
12 k
12 k
22 k
22 k 15 V
93 7582 e
PCB-Layout
GND 16 15 14 13
C1 12 11
C2 10 9
C4 VDD
C3 1 2 3 4 5 6 7 8
93 7583 e
Figure 6.
Rev. A1: 19.08.1996
Preliminary Information
7 (9)
U4286BM
Ordering and Package Information
Extended Type Number U4286BM-BFP U4286BM-BFPG3 Package SO16 plastic SO16 plastic
TELEFUNKEN Semiconductors
Remarks Taping according to IEC-286-3
Dimensions in mm
Package: SO16
8 (9)
Preliminary Information
Rev. A1: 19.08.1996
TELEFUNKEN Semiconductors
U4286BM
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
Rev. A1: 19.08.1996
Preliminary Information
9 (9)

▲Up To Search▲

Price & Availability of U4286BM

	To Download U4286BM Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .