CS289

CS289 CHERRY | Alldatasheet

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Technical content

Features

VZ CpÐ GndVSINE VBIAS CP+ Pwr Gnd VCOS SQIN F/V OUTVCC VREG SQOUT Function Generator Charge Pump n Single Supply Operation n On-Chip Regulation n 20mA Output Drive Capability Package Options 20L SOIC Wide (internally fused leads) 14L PDIP CS289 20mA Air-Core Tachometer Drive Circuit 1VZ VSINE VBIAS Gnd CPÐ CP+ NC VCC VCOS VREG SQIN SQOUT F/VOUT Gnd Gnd Gnd Gnd Gnd Gnd Gnd 1VZ VSINE VBIAS Gnd CPÐ CP+ NC Pwr Gnd VCC VCOS VREG SQIN SQOUT F/VOUT CS289

Description

The CS289 is specifically designed for use with air-core meter move- ments. The IC has charge pump cir- cuitry for frequency-to-voltage con- version, a shunt regulator for stable operation, a function generator, and sine and cosine amplifiers. The buffered sine and cosine outputs will typically sink or source 20mA. Block Diagram Absolute Maximum Ratings Lead Temperature Soldering 1Rev. 3/8/99 Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com A Company ¨

PACKAGE PIN # PIN SYMBOL FUNCTION Electrical Characteristics: (VCC = 13.1V, -30¡C ² TA² 85¡C) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CS289 20L SO (internally fused leads) 14L PDIP 11 V Z External Zener reference. 22 V sine Sine output signal. 34 V BIAS Test pin or "0" calibration pin. 4, 5, 6, 7, 7 Gnd Analog Ground connection. 14, 15, 16, 17 85 C PÐ Negative input to charge pump. 96 C P+ Positive input to charge pump. 10 3 NC No Connection 11 8 F/V OUT Output voltage proportional to input signal frequency. Supply Current (Note 2) V CC = 15.0V 54 mA VCC = 13.1V 60 65 mA VCC = 11.3V 60 65 mA Regulated Voltage I REG = 4.3mA 7.7 8.5 9.3 V Regulation I REG = 0 to 5mA 0.10 0.20 V Signal Input Current T = 25¡C 0.1 2.0 4.0 mA Saturation Voltage I SQ OUT = 5mA, ISQ IN = 500µA 0.20 0.55 V Leakage Current I SQ OUT = 16V, VSQ IN = 0V 10 µA Input Current C P+ = 0, T = 25¡C 1 15 nA F to V Output V SQIN = 0 (zero input), Æ = 0¡ 1.8 2.1 2.4 VCOS = 0 (Note 1), Æ = 270¡ 6.3 7.1 7.9 V Linearity E O vs. Frequency Vsine at Æ = 0¡ V SQ IN = 0 (zero input), Æ = 0¡ -0.55 0.00 0.55 V MAX Vsine+ VCOS = 0 (Note 1), Æ=90¡ 3.8 4.5 5.8 V MAX Vsine- VCOS = 0 (Note 1), Æ = 270¡ -3.8 -4.5 -5.8 V Coil Drive Current V COS = 0 (Note 1), Æ = 90¡, T = 25¡C 20 25 mA VCOS = 0 (Note 1), Æ = 270¡ 20 25 mA MAX VCOS+ VSQ IN = 0 (zero input), Æ = 0¡ 3.8 4.5 5.8 V MAX VCOS- Vsine = 0 (Note 1), Æ = 180¡ -3.8 -4.5 -5.8 V Coil Drive Current V SQ IN = 0 (zero input), Æ = 0¡ 20 25 mA Vsine = 0 (Note 1), Æ = 180¡ 20 25 mA External Voltage Ref. 4.98 5.40 5.85 V Note 1: Vsine measured Vsine to VZ. VCOS measured VCOS to VZ. All other voltages specified are measured to ground. Note 2: Max PWR dissipation ²VCC X ICC - (V2 Isine + V12 ICOS).

Typical Performance Characteristics VZ SINE OUTPUT Ð Ð VP COS Q VP SIN Q COSINE OUTPUT Q 0 45û 90û 135û 180û 225û 270û 2.1 7.1F/V Output (V) Relationship of EQ, Q and Frequency F/VOUT = 2.0V + FREQ X CT X RT X VREG Frequency/Output Angle (°) Output Angle in Polar Form Charge Pump Output Voltage VSINE, VCOS (V) -4.5 -3.5 -2.5 -1.5 VZ 1.5 2.5 3.5 4.5 4.5V 4.5V 0 45û 90û 135û 180û 225û 270û VCOS VSINE 2.1 3.8 5.45 7.1 Tachometer Angular Deflection (°) Function Generator Output Voltage Package Pin Description: continued PACKAGE PIN # PIN SYMBOL FUNCTION Note 1: Vsine measured Vsine to VZ. VCOS measured VCOS to VZ. All other voltages specified are measured to ground. Note 2: Max PWR dissipation ²VCC X ICC - (V2 Isine + V12 ICOS). 20L SO 14L PDIP 12 9 S QOUT Buffered square wave output signal. 13 10 S QIN Speed or RPM input signal. 18 11 V REG Voltage regulator output. 19 12 V COS Cosine output signal. 20 13 V CC Supply voltage. 14 Pwr Gnd Power Ground connection.

Figure 1. Functional Diagram of CS289 Circuit. reflects the charge as a voltage across resistor RT. are derived by On-Chip Amplifier/Comparator circuitry. the divider network by the function generator circuitry. Note: Pin connections referenced are for the 14L DIP.

0.7V 2.1V IOUT/EQ CPÐ CP+ Gnd F-V OUT CPRT VBIAS CPÐ CP+ Gnd VREG SQIN SQOUT F-VOUT NC V COS RT CT 1kW 10kW TRIM CP VF/VOUT = 2.1 + Frequency x CT x RT (VREG -0 .7) The above equations were used in calculating the follow- ing values, where VF/VOUT = 7.1V at =270¡ and CT = 0.01 F. 4 cylinder: Freq = 200Hz, RT = 320k½ 6 cylinder: Freq = 300Hz, RT = 220k½ 8 cylinder: Freq = 400Hz, RT = 150k½ CS289 Tachometer Application RPM x # OF CYL. = Frequency Typical values shown above apply to a nominal value of VREG of 8.5 volts. It must be realized that trimming of RT will be necessary to compensate for variations in regula- tor voltage from one unit to another. An alternative to this adjustment is to replace R 2 with a potentiometer, as shown in Figure 2. Partial schematic shown in Figure 3 represents one met- hod for use with DC applications instead of frequency. Figure 2: Alternate Trimming Method Figure 3: DC Application

CS289GDWF20 20 Lead SO Wide (internally fused leads) CS289GDWFR20 20 Lead SO Wide (internally fused leads) (tape & reel) CS289GN14 14 Lead PDIP CS289 Thermal Data 14L 20L SOIC PDIP Wide (internally fused leads) RQJC typ 48 17 ¡C/W RQJA typ 85 90 ¡C/W D Lead Count Metric English Max Min Max Min 14L PDIP 19.69 18.67 .775 .735 20L SO Wide 13.00 12.60 .512 .496 (internally fused leads) Package Specification PACKAGE DIMENSIONS IN mm (INCHES)

Ordering Information

Rev. 3/8/99 © 1999 Cherry Semiconductor Corporation Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information. Surface Mount Wide Body (DW); 300 mil wide 1.27 (.050) BSC 7.60 (.299) 7.40 (.291) 10.65 (.419) 10.00 (.394) D 0.32 (.013) 0.23 (.009) 1.27 (.050) 0.40 (.016) REF: JEDEC MS-013 2.49 (.098) 2.24 (.088) 0.51 (.020) 0.33 (.013) 2.65 (.104) 0.10 (.004) Plastic DIP (N); 300 mil wide 0.39 (.015) MIN. 1.14 (.045) D Some 8 and 16 lead packages may have 1/2 lead at the end of the package. All specs are the same. .203 (.008) .356 (.014) REF: JEDEC MS-001 3.68 (.145) 2.92 (.115) 8.26 (.325) 7.62 (.300) 7.11 (.280) 6.10 (.240) .356 (.014) .558 (.022)