View SP8715_363954.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

SP8715 SP8715
1100MHz Very Low Current Multi-Modulus Divider
DS3830
ISSUE 4.2
September 1999
Features
G G G G G G G
Operation to 1100MHz Very Low Power Single Supply Operation 2.7V to 5.25V Power Down Facility for Battery Economy Latched Modulus Control Input Push Pull Output Drive ESD Protection on All Pins
Ordering Information SP8715/IG/MPAS Industrial Temperature Range Miniature Plastic SOIC Package SP8715/IG/MPAC As Above supplied on Tape and Reel
Description
The SP8715 is a switchable divide by 64/65, 128/129 programmable divider which is guaranteed to operate up to 1100MHz. It will operate from a supply of 2.7V to 5.25V and requires typically 3.6mA (including the output current). It also features a power down facility for battery economy. The RF inputs are internally biased and should be capacitively coupled to the signal source. The output is designed to interface with CMOS synthesisers.
Applications
G G G
Cellular Telephones Cordless Telephones Mobile Radio
ESD precautions must be observed
V CK 6 MC D 2 Q
CC
D TYPE
BIAS
7
POWER DOWN
3 RS V CC
250K
5 V EE
CONTROL LOGIC
NOMINAL
RF INPUT (CLOCK)
1
DIVIDE BY 4/5
8 V
DIVIDE BY 16 / 32
4 OUTPUT
EE
Figure 1 Block Diagram
1
SP8715
MP8
Figure 2 Pin Connections
Absolute Maximum Ratings
Supply voltage (VEE =0V) (note 1) -0.5V to 7V Control and RF inputs, (note 1)-0.5V to VCC+0.5V RF output (VEE =0V) RF input current (note 1) 10mA Operating temperature -40C to +85C Storage temperature range -55C to +150C Maximum junction temperature +150C NOTE 1. Duration <2 minutes.
Electrical Characteristics
Guaranteed over the following conditions (unless otherwise stated): VCC =+2.7V to +5.25V (with respect to VEE), Output load (pin 4) = 10pF, Tamb = -40C to +85C (note 2) Value
Characteristic
Min. (note 3) (note 3) VCC-0.5 0 (note 4) (note 4) (note 4, 9) (note 4, 9) 0.6VCC 0 0.6VCC 0 1100
Typ. 3.6 8
Max. 4.2 50 V CC V CC-2.0 V CC 0.4VCC V CC 0.4VCC
Units
Conditions
Supply current Supply current Power down high Power down low Modulus control high Modulus control low Ratio select high Ratio select low
mA A V V V V V V MHz
Power down input low Power down input high
Divide by 64 or 128 Divide by 65 or 129 Divide by 64 or 65 Divide by 128 or 129 See Figure 5 See Figure 5
Max. sinewave input frequency Min. sinewave input frequency Min. RF input voltage Max. RF input voltage
200 50 200
MHz
mV RMS RF input 200MHz to 1100MHz. See Figure 5 mV RMS RF input 200MHz to 1100MHz. See Figure 5
2
SP8715
Electrical Characteristics (Continued)
Guaranteed over the following conditions (unless otherwise stated): VCC=+2.7V to +5.25V (with respect to VEE), Output load (pin 4) = 10pF, T amb = -40C to +85C (note 2) Value
Characteristic
Min. 500 20
Typ. 600
Max.
Units
Conditions
Output level (pin 4) Modulus set-up time, ts (notes 5,6,8) Modulus hold time, th Power down time, tpd (notes 7,8) (notes 6,8) (notes 7,8)
mV p-p ns 1 10 6 ns s s RF input = 1GHz RF input = 1GHz See Figure 9 See Figure 9
Power down recovery time, t pu
NOTES 2. All electrical testing is performed at +85C. 3. Typical values are measured at +25C and VCC = +5V. 4. Modulus Control and Ratio Select are high impedance inputs which can be driven directly by standard CMOS outputs. 5. Modulus control is latched at the end of the previous cycle. 6. See Figure 4. 7. See Figure 8. 8. These parameters are not tested but are guaranteee by design. 9. The ratio select pin is not intended to be switched dynamically.
OPERATING NOTES
The RF inputs are biased internally and are normally coupled to the signal source with suitable capaitors. The output stage has a novel design and is intended to drive a CMOS synthesiser input. External pulldown resistors or circuits are not required. The SP8715 is not suitable for driving TTL or similar devices. The device will operate down to DC frequencies for non-sinusoidal signals provided that the input slew rate is better than 100V/s. POWER DOWN (pin 7) is connected internally to a pull-down resistor. If the battery economy facility is not used, pin 7 should be either left unconnected or connected to V EE.
3
SP8715
RF INPUT VOLTAGE (mV RMS)
1000
Ratio Select (Pin 3) L L H H
Modulus Control (Pin 6) L H L H
Division Ratio
800 TYPICAL OVERLOAD
600
129 128 65 64
400 TYPICAL SENSITIVITY 200 GUARANTEED* OPERATING WINDOW
Table 1 Truth Table
0 200 400 600 800 1000 1200
FREQUENCY (MHZ)
* Tested as specified in table of Electrical Characteristics
Figure 3 Typical Input Characteristics
RF INPUT CLOCK
MODULUS CONTROL INPUTS
DON'T CARE
DON'T CARE
OUTPUT
32 (64)
32 (64) or 33 (65)
ts th
Figure 4 Modulus Control Timing Diagram
4
SP8715
V CC 100n 50 MONITOR 1n 50 SIGNAL SOURCE
V CC RF INPUT
V EE POWER DOWN
SP8715
OUTPUT 1n RF INPUT MC RATIO SELECT CL
OUTPUT
10n
10n
MODULUS CONTROL 1 INPUT
MODULUS CONTROL 2 INPUT
Figure 5 Toggle Frequency Test Circuit
j1 j0.5 j2
S11 PLOT 50 OHM NORMALISED
j0.2
0.2
0.5
1
2
f1
-j0.2
f1: 130MHz f2: 1310MHz
-j0.5
f2 -j2
-j1
Figure 6 Typical S11 parameter for pin 1. V CC = +5.0V
5
SP8715
300
200
R( )
100
0
-100
-200
-300
jx ( )
-400
-500
-600
-700
-800 100
200
300
400
500
600
700 800 900 INPUT FREQUENCY (MHz)
1000
1100
1200
1300
1400
Figure 7 Typical Input Impedance v. Frequency
6
SP8715
FREQ-MHZ 130.000 153.600 177.200 200.800 224.400 248.000 271.600 295.200 318.800 342.400 366.000 389.600 413.200 436.800 460.400 484.000 507.600 531.200 554.800 578.400 602.000 625.600 649.200 672.800 696.400 720.000 743.600 767.200 790.800 814.400 838.000 861.600 885.200 908.800 932.400 956.000 979.600 1003.20 1026.80 1050.40 1074.00 1097.60 1121.20 1144.80 1168.40 1192.00 1215.60 1239.20 1262.80 1286.40 1310.00 R () 255.068 153.362 153.330 115.187 88.649 80.815 71.050 56.207 39.526 41.338 38.779 39.210 23.809 21.221 27.545 23.333 22.227 19.931 17.767 17.636 14.607 12.479 13.075 12.891 12.583 11.250 10.213 10.187 11.269 11.081 10.509 10.063 10.172 10.745 10.841 10.884 12.260 12.984 14.508 16.625 19.260 22.799 23.285 21.149 18.956 16.434 14.377 13.743 12.711 12.776 12.598 jx () -733.538 -688.623 -583.339 -545.839 -482.377 -441.798 -411.502 -369.645 -346.620 -323.129 -304.804 -280.556 -269.674 -255.279 -245.161 -234.680 -224.572 -211.375 -203.241 -194.613 -186.545 -182.049 -174.839 -168.320 -160.468 -156.267 -149.642 -145.328 -143.144 -137.557 -132.750 -129.254 -124.495 -120.568 -118.100 -113.395 -109.552 -105.975 -103.110 -99.886 -98.149 -98.605 -99.907 -100.925 -99.639 -98.425 -95.033 -92.553 -89.249 -86.081 -82.581
Table.2 Coefficients for Figure 7
7
SP8715
VOLTAGE CURRENT
tpu
0.95 I C VCC - 0.5V POWER DOWN INPUT VOLTAGE SUPPLY CURRENT
VCC - 2.0V
tpd
TIME
0.05 I C
Figure 8 Power Up and Power Down
Figure 9 Power-Down Time Test Circuit
8
For more information about all Zarlink products visit our Web Site at
www.zarlink.com
Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively "Zarlink") is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink's conditions of sale which are available on request.
Purchase of Zarlink's I2C components conveys a licence under the Philips I2C Patent rights to use these components in an I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2002, Zarlink Semiconductor Inc. All Rights Reserved.
TECHNICAL DOCUMENTATION - NOT FOR RESALE

▲Up To Search▲

Price & Availability of SP8715

	To Download SP8715 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .