SP8713 SP8713 1100MHz Very Low Current Three Modulus Divider DS3934 - 4.0 November 1997 The SP8713 is a switchable divide by 64/65/72 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 4.1mA (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, such as the NJ88C50. RF INPUT 1 8 RF INPUT VCC MODULUS CONTROL 1 2 7 POWER DOWN 6 MODULUS CONTROL 2 OUTPUT 4 5 VEE FEATURES ■ ■ ■ ■ ■ ■ ■ Operation to 1100MHz Very Low Power Single Supply Operation 2.7V to 5.25V Power Down Facility for Battery Economy Latched Modulus Control Inputs Push Pull Output Drive ESD Protection on All Pins† 3 SP8713 MP8 Fig. 1 Pin connections - top view APPLICATIONS ORDERING INFORMATION ■ Cellular Telephones ■ Cordless Telephones ■ Mobile Radio SP8713 IG MPAS Industrial Temperature Range Miniature Plastic DIL Package SP8713 IG MPAC As above supplied on Tape and Reel † ESD precautions must be observed V CC 2 6 D 3 D MC1 DDTYPE TYPE Q CK MC2 V CC D TYPE 250K NOMINAL BIAS 7 Q CONTROL LOGIC POWER DOWN 5 V RF INPUT (CLOCK) EE 1 DIVIDE BY 4/5 DIVIDE BY 16 4 OUTPUT 8 V EE Fig. 2 Block diagram 1 SP8713 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 Min. Typ. Max. Units Conditions Supply current (note 3) 4.1 4.7 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 1 high (note 4) 0.6VCC VCC V Divide by 64 or 72 Modulus control 1 low (note 4) 0 0.4VCC V Divide by 65 or 72 Modulus control 2 high (note 4) 0.6VCC VCC V Divide by 72 Modulus control 2 select low (note 4) 0 0.4VCC V Divide by 64 or 65 Max. sinewave input frequency 1100 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 1100MHz. See Figure 5 mV RMS RF input 200MHz to 1100MHz. See Figure 5 600 mV p-p 20 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) 6 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 guranteed by design. 2 SP8713 OPERATING NOTES Modulus Control 1 (Pin 3) Modulus Control 2 (Pin 6) L H H L L L H H Division Ratio 65 64 72 72 RF INPUT VOLTAGE (mV RMS) The RF inputs are biased internally and are normally coupled to the signal source with suitable capacitors. 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 SP8713 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 200 GUARANTEED* OPERATING WINDOW 0 200 400 600 800 1000 1200 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 or 36 OUTPUT 32, 33 or 36 ts th Fig. 4 Modulus control timing diagram 3 SP8713 V CC 100n 50Ω MONITOR 1n V CC 50Ω SIGNAL SOURCE V EE POWER DOWN RF INPUT SP8713 OUTPUT OUTPUT 1n CL RF INPUT MC 1 MC 2 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 0.2 0.5 1 2 f1 -j0.2 f1: 130MHz f2: 1310MHz f2 -j0.5 -j2 -j1 Fig. 6 Typical S11 parameter for pin 1. VCC = +5.0V 4 SP8713 300 200 R(Ω) ) R( 100 0 -100 -200 -300 jx )) jx((Ω -400 -500 -600 -700 -800 100 200 300 400 500 600 700 800 900 INPUT FREQUENCY (MHz) 1000 1100 1200 1300 1400 Fig. 7 Typical input impedance v. frequency 5 SP8713 FREQ-MHZ R (Ω) jx (Ω) 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 1310.00 255.068 153.362 153.330 115.187 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 -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 Fig.7 6 SP8713 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 SP8713 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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