SP8714 SP8714 2100MHz Very Low Current Multi-Modulus Divider DS3562 - 5.1 April 1999 The SP8714 is a switchable divide by 32/33, 64/65 programmable divider which is guaranteed to operate up to 2100MHz. It will operate from a supply of 2.7V to 5.25V and requires typically 6.8mA (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. RF INPUT 1 VCC RATIO SELECT 2 OUTPUT 4 FEATURES ■ ■ ■ ■ ■ ■ ■ Operation to 2100MHz 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† SP8714 RF INPUT 7 POWER DOWN 6 MODULUS CONTROL 5 VEE MP8 Fig. 1 Pin connections - top view ORDERING INFORMATION APPLICATIONS SP8714 IG MPAS Industrial Temperature Range Miniature Plastic SOIC Package SP8714 IG MPAC As above supplied on Tape and Reel ■ Cellular Telephones ■ Cordless Telephones † 3 8 ESD precautions must be observed V 6 D MC D TYPE CC 2 CK 250K NOMINAL Q BIAS 3 RS V CC CONTROL LOGIC 7 POWER DOWN 5 V RF INPUT (CLOCK) EE 1 DIVIDE BY 4/5 DIVIDE BY 8 / 16 4 OUTPUT 8 V EE Fig. 2 Block diagram 1 SP8714 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 -40°C to +85°C Storage temperature range -55°C to +150°C Maximum junction temperature +150°C 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 = -40°C to +85°C (note 2) Value Characteristic Units Min. Typ. Conditions Max. Supply current (note 3) 6.8 8.5 mA Power down input low Supply current (note 3) 8 50 µA Power down input high Power down high VCC-0.5 VCC V Power down low 0 VCC-2.0 V Modulus control high (note 4) 0.6VCC VCC V Divide by 32 or 64 Modulus control low (note 4) 0 0.4VCC V Divide by 33 or 65 Ratio select high (note 4, 9) 0.6VCC VCC V Divide by 32 or 33 Ratio select low (note 4, 9) 0 0.4VCC V Divide by 64 or 65 Max. sinewave input frequency 2100 Min. sinewave input frequency 200 Min. RF input voltage 50 Max. RF input voltage 200 Output level (pin 4) 500 Modulus set-up time, ts (notes 5,6,8) MHz See Figure 5 MHz See Figure 5 mV RMS RF input 200MHz to 2100MHz. See Figure 5 mV RMS RF input 200MHz to 2100MHz. See Figure 5 600 mV p-p 10 ns RF input = 1GHz Modulus hold time, th (notes 6,8) 1 ns RF input = 1GHz Power down time, tpd (notes 7,8) 10 µs See Figure 9 Power down recovery time, tpu (notes 7,8) 8 µs See Figure 9 NOTES 2. All electrical testing is performed at +85°C. 3. Typical values are measured at +25°C 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 guaranteed by design. 9. The ratio select pin is not intended to be switched dynamically. 2 SP8714 OPERATING NOTES Ratio Select (Pin 3) Modulus Control (Pin 6) L L H H L H L H Division Ratio 65 64 33 32 RF INPUT VOLTAGE (mV RMS) 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 pull-down resistors or circuits are not required. The SP8714 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/µs. POWER DOWN (pin 7) is connected internally to a pull-up resistor. If the battery economy facility is not used, pin 7 should be connected to VEE. Table 1 Truth table 1000 800 TYPICAL OVERLOAD 600 400 TYPICAL SENSITIVITY GUARANTEED* OPERATING WINDOW 200 0 500 1000 1500 2000 2500 3000 FREQUENCY (MHz) * Tested as specified in table of Electrical Characteristics Fig. 3 Typical input characteristics RF INPUT CLOCK MODULUS CONTROL INPUTS DON'T CARE DON'T CARE 32 (16) OUTPUT 32 (16) or 33 (17) ts th Fig. 4 Modulus control timing diagram 3 SP8714 V CC 100n 50Ω MONITOR 1n V CC 50Ω SIGNAL SOURCE V EE POWER DOWN RF INPUT SP8714 OUTPUT OUTPUT CL 1n RF INPUT RATIO SELECT MC 10n 10n MODULUS CONTROL 1 INPUT MODULUS CONTROL 2 INPUT Fig. 5 Toggle frequency test circuit j1 j2 j0.5 S11 PLOT 50 OHM NORMALISED j0.2 f2 0.2 0.5 1 2 f1 -j0.2 f1: 130MHz f2: 2.49GHz -j0.5 -j2 -j1 Fig. 6 Typical S11 parameter for pin 1. VCC = +5.0V 4 SP8714 300 200 R(Ω) R(Ω) 100 0 -100 -200 -300 jx jx( (Ω)Ω) -400 -500 -600 -700 -800 100 300 500 700 900 1100 1300 1500 1700 1900 2100 2300 2500 INPUT FREQUENCY (MHz) Fig. 7 Typical input impedance v. frequency 5 SP8714 FREQ-MHZ R (Ω) jx (Ω) 130.000 177.200 224.400 271.600 318.800 366.000 413.200 460.400 507.600 554.800 602.000 649.200 596.400 743.600 790.800 838.000 885.200 332.400 979.600 1026.80 1074.00 1121.20 1168.40 1215.60 1262.80 1310.00 1357.20 1404.40 1451.60 1498.80 1546.00 1593.20 1640.40 1687.60 1734.80 1782.00 1829.20 1876.40 1923.60 1970.80 2018.00 2065.20 2112.40 2159.60 2206.80 2254.00 2301.20 2348.40 2395.60 2442.80 2490.00 255.068 153.330 88.649 71.050 39.526 38.779 23.809 27.545 22.227 17.767 14.607 13.075 12.583 10.213 11.269 10.509 10.172 10.841 12.260 14.508 19.260 23.285 18.956 14.377 12.711 12.598 14.565 19.164 15.001 15.864 18.993 26.822 39.830 47.875 63.267 74.259 58.878 42.530 32.302 27.333 24.894 23.369 23.577 23.023 23.325 24.623 26.340 28.632 31.161 34.219 39.808 -733.538 -583.339 -482.377 -411.502 -346.620 -304.804 -269.674 -245.161 -224.572 -203.241 -186.545 -174.839 -160.468 -149.642 -143.144 -132.750 -124.495 -118.100 -109.552 -103.110 -98.149 -99.907 -99.639 -95.033 -89.249 -82.581 -77.212 -71.976 -70.250 -61.898 -53.403 -44.704 -41.522 -43.255 -44.879 -67.801 -86.964 -87.052 -80.484 -73.570 -67.291 -60.620 -54.716 -49.220 -43.340 -37.163 -30.805 -24.040 -17.165 -8.172 -4.368 Table.2 Coefficients for Fig.7 6 SP8714 CURRENT VOLTAGE tpu 0.95 I C VCC - 0.5V POWER DOWN INPUT VOLTAGE SUPPLY CURRENT VCC - 2.0V tpd 0.05 I C TIME Fig. 8 Power up and power down PULSE GENERATOR INPUT 47Ω 8 SP8714 1 POWER SUPPLY + 10nF CURRENT SENSE RESISTOR OSCILLOSCOPE PROBE POINT Fig. 9 Power-down time test circuit 7 http://www.mitelsemi.com World Headquarters - Canada Tel: +1 (613) 592 2122 Fax: +1 (613) 592 6909 North America Tel: +1 (770) 486 0194 Fax: +1 (770) 631 8213 Asia/Pacific Tel: +65 333 6193 Fax: +65 333 6192 Europe, Middle East, and Africa (EMEA) Tel: +44 (0) 1793 518528 Fax: +44 (0) 1793 518581 Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively “Mitel”) is believed to be reliable. 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