ES51918

ES51918 11,000 Counts Auto DMM Features • 11,000 counts LCD display • Conversion rate : 4 times/s • Full automatic measurement *Voltage measurement: 110.00mV – 1000.0V *Current measurement: µA/mA/A *Resistance measurement: 110.00Ω – 110.0MΩ *Capacitance measurement: 11.000nF – 110.00mF(12.5sec) *Frequency counter: 1.1000KHz – 110.00MHz • Current modes for clamp meter • Diode measurement • Continuity check • ADP mode with independent reference voltage • Temperature mode with internal scale conversion circuit from 0C to 0F • Range change function • VAHZ function • Peak Hold with automatic calibration • Relative function • Zero function in manual DCA mode • Data hold function • MAX/MIN function • SHIFT feature for 110.0MΩ v1.08 • High Crest Factor signal detection (R.O.C patent No. I 234661) • Band-gap reference voltage output • CE selection • On-chip independent OPAMP • Serial data output (RS232 format) • LCD segment check when power on • Auto power off with idle time selection • Sleep output • Re-power on • On-chip buzzer driver • 3V DC power supply • Low battery detection for 3V or 9V battery • Back light function Description ES51918 is an integrated analog-to-digital converter (ADC) with 11,000 counts LCD display, automatic range selection, and 3V DC power supply. Automatic range selection is provided for voltage (AC/DC) measurement, resistance measurement, current measurement, capacitance measurement, and frequency counter. Expensive and bulky mechanical range switches are not required. Other features include peak detection with calibration mode, relative value display, zero-offset removing feature in manual DCA mode for clampmeter, data holding, maximum and minimum holding, diode measurement, temperature measurement, continuity checking, low battery detection, auto power off, re-power on, and RS232 data output. 1 06/04/03 ES51918 11,000 Counts Auto DMM Application Digital multimeter Clamp meter Thermometer Pin Assignment 80 75 70 65 60 55 RANGE HOLD REL_ZERO PEAK VAHZ MAX/MIN BKOUT BUZOUT BUZIN ANNUNC BP1 BP2 BP3 BP4 SEG01 SEG02 SEG03 SEG04 SEG05 SEG06 SEG07 SEG08 SEG09 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 50 10 15 20 25 v1.08 V+ V+ CREF+ CREFCINT CAZ BUFF RAZ IVSH IVSL OVX OVH OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH ADI ADO ADOHZ OPO OPIN+ OPINPWD VRH VR 30 5 OSC1 OSC2 APOSEL CESEL BKLIT KEY SLACDC FC5 FC4 FC3 FC2 FC1 LBAT9 SDO C+ CVDGND AGND AGND 85 90 Cyrustek. com.tw 45 40 95 ES51918P 35 100 SEG17 SEG18 OHMC3 OHMC2 RS232 FREQ SLEEP OHMC1 CA+ CAR1K R9K PMAX PMIN VBAR VR1 SGND ADP VAVA+ 2 06/04/03 ES51918 11,000 Counts Auto DMM Pin Description Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 v1.08 Symbol V+ V+ CREF+ CREFCINT CAZ BUFF RAZ IVSH IVSL OVX OVH OVSG OR1 VR5 VR4 VR3 VR2 TEST 5 ACVL ACVH ADI ADO ADOHZ OPO OPIN+ OPINPWD VRH VR VA+ VAADP SGND VR1 VBAR PMIN PMAX R9K R1K CACA+ OHMC1 Type O O I/O I/O O I O O I I I I I O O O O O I/O O O I O I O I I I O I I I I G I I O O O O I/O I/O O Description Output of on-chip DC-DC converter. Output of on-chip DC-DC converter. Positive connection for reference capacitor. Negative connection for reference capacitor. Integrator output. Connect to integral capacitor Auto-zero capacitor connection. Buffer output pin. Connect to integral resistor Buffer output pin in high-speed mode. Connect to high-speed integral resistor. Current measurement input for 1100µA, 110mA and 11A modes. Current measurement input for 110µA, 11mA. Input high voltage for resistance measurement Output connection for resistance measurement Sense low voltage for resistance measurement Reference resistor connection for 110.00Ω range Voltage measurement ÷10000 attenuator(1000.0V) Voltage measurement ÷1000 attenuator(110.00V) Voltage measurement ÷100 attenuator(11.000V) Voltage measurement ÷10 attenuator(1.1000V) Test pin DC signal low input in ACV/ACA mode. Connect to negative output of external AC to DC converter. DC signal high input in ACV/ACA mode. Connect to positive output of external AC to DC converter. Negative input of internal AC to DC OP Amp. Output of internal AC to DC OP Amp. Frequency input under voltage/current mode, offset to AGND. Output of internal independent OP Amp. Positive input terminal of on-chip independent OP Amp. Negative input terminal of on-chip independent OP Amp. Power-down enable for on-chip independent OP Amp. Output of band-gap voltage reference. Typically –1.23V Reference input voltage connection. Typically –100mV For ADP mode. De-integrating voltage positive input. The input should be higher than VA-. For ADP mode. De-integrating voltage negative input. The input should be lower than VA+. Measurement input in ADP mode. Signal Ground. Measurement input. In capacitance mode, a compensation capacitor is connected. In temperature mode, it is used to control decimal point. In µA or mA modes, it is used to control the ‘µ’ or ‘m’ sign. Minimum peak hold output Maximum peak hold output. Connect to a precise 9KΩ resister for capacitor measurement. Connect to a precise 1KΩ resister for capacitor measurement. Negative auto-zero capacitor connection for capacitor measurement Positive auto-zero capacitor connection for capacitor measurement Filter capacitor connection for resistance mode. 3 06/04/03 ES51918 11,000 Counts Auto DMM 44 SLEEP 45 FREQ 46 RS232 47 OHMC2 48 OHMC3 49 - 66 SEG18 – SEG01 67 BP4 68 BP3 69 BP2 70 BP1 71 ANNUNC Sleep mode indicator, asserts low in SLEEP mode. Frequency counter input, offset V-/2 internally by the chip. Assert low to enable serial data output. Filter capacitor connection for resistance mode. Filter capacitor connection for resistance mode. LCD segment line 01 – 18 LCD backplane 4 LCD backplane 3 LCD backplane 2 LCD backplane 1 Square wave output at the backplane frequency, synchronized to BP1. ANNUNC can be used to control display annunciator. Connect a LCD segment to ANNUNC to turn it on; connect an LCD segment to its backplane to turn it off. I Pull to V- to enable the BUZOUT. O Outputs a 2KHz audio frequency signal for driving piezoelectric buzze when BUZIN is low. O If BKLIT function is enabled, this pin will change from –3V to +3V For 60 sec, once press BKLIT pin again within 60 sec, this pin will Change back to –3V. I Pulse to V- to enable MAX/MIN function. I Pulse to V- to enable VAHZ mode. I Pulse to V- to enable Peak Hold mode. I Pulse to V- to enable Relative function or Zero function. I Pulse to V- to enable HOLD function. I Pulse to V- to enable manual mode and manual range selection. I Crystal oscillator input connection O Crystal oscillator output connection I Idle time selection for auto power off feature. I CE selection feature control pin. I Back light function. Pulse low to set BKOUT pin output. I Pulse to V- to change mode. In ADP mode, if this pin is connected to V-, the buzzer output will be off when the ADP input overflows. I Select initial state. Please refer to page 15 I Switch 5 for function selection. I Switch 4 for function selection. I Switch 3 for function selection. I Switch 2 for function selection. I Switch 1 for function selection. I Low battery configuration. If 3V battery is used, connect it to AGND. The default low-battery threshold voltage is –2.3V. If 9V battery is Used, the low battery annunciator is displayed when the voltage of this pin is less than VRH (-1.2V) O RS232 compliant serial data output. O Positive capacitor connection for on-chip DC-DC converter. O Negative capacitor connection for on-chip DC-DC converter. P Negative supply voltage. Connecting to 3V battery negative terminal. P/G Digital ground. Connecting to 3V battery positive terminal. P/G Analog ground. P/G Analog ground. O I I O O O O O O O O 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 BUZIN BUZOUT BKOUT MAXMIN VAHZ PEAK REL_ZERO HOLD RANGE OSC1 OSC2 APOSEL CESEL BKLIT KEY SLACDC FC5 FC4 FC3 FC2 FC1 LBAT9 94 95 96 97 98 99 100 SDO C+ CVDGND AGND AGND v1.08 4 06/04/03 ES51918 11,000 Counts Auto DMM Absolute Maximum Ratings Characteristic Supply Voltage (V- to AGND) Analog Input Voltage V+ AGND/DGND Digital Input Power Dissipation. Flat Package Operating Temperature Storage Temperature Rating -4V V- -0.6 to V+ +0.6 V+ ≥ (AGND/DGND+0.5V) AGND/DGND ≥ (V- -0.5V) V- -0.6 to DGND +0.6 500mW 0℃ to 70℃ -25℃ to 125℃ Electrical Characteristics TA=25℃, V- = -3V Parameter Power supply Operating supply current In DCV mode Voltage roll-over error Voltage nonlinearity Input Leakage Low battery flag voltage Zero input reading Reference voltage and open circuit voltage for 110Ω measurement Peak to peak backplane drive voltage Counter time base period Open circuit voltage for Ω measurement (except 110Ω) Symbol Test Condition VIDD Normal operation ISS In sleep mode REV 10MΩ input resistor NLV Best case straight line V- to AGND 10MΩ input resistor 100KΩ resistor between VRH and AGND -3.5V≤ V ≤-2.2V fOSC = 4MHZ Ω and Continuity Mode Between V- pin and HOLD, RANGE, KEY, FC1~FC5, BKLIT,MAXMIN Between V- pin and RS232 Between GND Pin and PWN ±1% ±5% Input from ADOHZ Duty Cycle=50% Input from FREQ Duty Cycle=50% 5 Min. -3.5 — — — — -10 -2.4 -000 -1.33 3.1 — -0.21 Typ. -3.0 1.8 2.5 — — 1 -2.3 000 -1.23 3.2 1 -0.19 Max -2.2 2.0 5 ±0.05 ±0.05 10 -2.2 +000 -1.13 3.3 — -0.17 Units V mA µA %F.S1 %F.S pA V counts V V sec V VREF Internal pull-high to 0V current Internal pull-low to Vcurrent AC frequency response at 2.2000V range Sensitivity in VAHZ mode Sensitivity in Frequency mode — — 1.2 11 1.5 — µA — µA — — HZ mV(Vpp) mV(Vpp) — — 600 600 40-400 400-2000 v1.08 06/04/03 ES51918 11,000 Counts Auto DMM Reference voltage temperature coefficient Minimum pulse width for Peak Hold feature TCRF TPW 100KΩ resister Between VRH 0℃ 1s Original State (Auto/Manual) 1 push > 1s 〝REL〞active. The relative value push HOLD 1 push < 1s 〝REL〞blink. The DN value push HOLD 〝REL〞and〝H〞active. Hold the relative value 1 push < 1s 〝REL〞and〝H〞blink. The DN value Note: It’s possible that the relative value exceeds 11,000 or –11,000 counts, but never exceeds 19,999 or –19,999 counts. Such relative values are displayed. The LCD shows OL in REL mode only if DN or DN+K is more than 10,999 counts or the relative value is more than 19,999. 3.5 Max/Min + HOLD The meter displays the maximum or minimum value of the input in Max/Min mode. When Max/Min is pressed for the first time, the meter displays the maximum value. When Max/Min is pressed again, the meter displays the minimum value. When Max/Min is pressed for the third time, the meter displays current value. The meter returns to normal operation if Max/Min is pressed and held for longer than one second. Pressing HOLD in Max/Min mode makes the meter stop updating the maximum or the minimum value. 1 push1s Original state (Automatic/manual) 1 push>1 sec 1 push>1 sec “MAX” active 1push 1s ‘Zero’ ‘Min’ Active Show Min. DN+K - DN Value Press HOLD Press Zero < 1s Press Zero < 1s Press Zero < 1s Press Max/Min < 1s ‘Zero’ ‘Max’ ‘Hold’ Active Hold Max. DN+K - DN Value ‘Zero’ ‘Min’ ‘Hold’ Active Hold Min. DN+K - DN Value Press Max/Min < 1s v1.08 21 06/04/03 ES51918 11,000 Counts Auto DMM 3.8 Peak + HOLD Peak mode takes input from Pmax or Pmin pin. The peak values are stored in external capacitors. Polyster mylar capacitors are recommended. The precision of Peak mode measurement can be enhanced by calibration. Calibration for Peak mode is invoked by pressing Peak bottom for more than 2 seconds. Entering Peak mode will automatically execute peak calibration, if peak calibration was never done before. The Calibration process measures and stores the offset voltage of internal operation amplifiers. High precision is achieved by substracting this offset from reading. When power off the ES51918 or switch the measurement mode to temperature mode, the calibrated offset value will be cleared. ES51918 will automatically execute peak calibration, if peak mode was activated again after the calibrated offset value was cleared. CALIBRATION CALIBRATION Done 1 push > 2 s 1 push > 2 s End Original State (Auto/Manual) 1 push > 1 s 1 push < 1 s Already calibrated Yes No 〝Pmax〞active. Max. Peak Value push HOLD 1 push < 1 s 〝Pmin〞active. Min. Peak Value push HOLD 〝Pmax〞 HOLD〞 〝 , active. 〝Pmin〞 HOLD〞 〝 , active. 1 push < 1 s Max. Peak Value Min. Peak Value 4 Serial Data Output The RS232 function will be activated if the RS232 pin is pulled to and asserts at V-. The serial data sent to SDO pin once every A/D conversion cycle. The data format complies with JIS 7Bits transmission code with a baud rate of 19230. The host can use RS232 interface to read the data. A single data packet includes a start bit (always 0), 7 data bits, an odd parity check bit, and a stop bit (always 1). The high and low voltage levels correspond to DGND and V- respectively. SDO remains at 1 (high) when it is v1.08 22 06/04/03 ES51918 11,000 Counts Auto DMM inactive. Hence the start bit (0) could be used as the triggering signal to begin the reading process. The following figure shows the data format of a single packet. The LSB is sent first and the MSB is sent last. single package 0V -3V 0 LSB D0 ~D6 p1 P MSB One data block consists of 11 packets, or 110 bits. The following figure shows the format of a data block. The range packet indicates the full scale range of the meter. Digit 3 through digit 0 are just the digits on the LCD panel. The function packet indicates the measurement mode of the meter. Status, option 1 and option 2 give the status of the meter. CR and LF are delimiters used to separate the blocks. all package 0 range 0 digit1 0 status p10 digit3 p10 digit0 p10 option1 p10 digit2 p10 function p10 option2 p1 p1 p1 0 CR p10 LF p1 The meter always outputs the current input value to the serial port in spite of HOLD mode. Each block is repeated twice in one conversion cycle. The detailed data format of each packet is listed below. v1.08 23 06/04/03 ES51918 11,000 Counts Auto DMM 4.1 FUNCTUON This packet indicates the measurement mode of the meter. The following table summarizes the transmitted code for each mode. Note that the encoding of this packet is different from the encoding of FC1-FC5 switch. Code 0111011 0111101 0111111 0110000 0111001 0110011 0110101 0110001 0110010 0110110 0110100 0111110 Measurement Mode Voltage Auto µA Current Auto mA Current 11 A current Manual A Current Ω Continuity Diode Frequency Capacitance *Temperature ADP *The judge bit in the Status packet determines whether the unit is Celsius or Fahrenheit. 4.2 RANGE This packet indicates the full-scale range of the meter. When the meter operates in continuity mode or diode mode, this packet is always 0110000 since the full-scale ranges in these modes are fixed. The following table lists the code for each range in each measurement mode. Code 0110000 0110001 0110010 0110011 0110100 0110101 0110110 0110111 V Auto mA Auto µA 11 A 1.1000V 11.000mA 110.00µA 11.000V 110.00mA 1100.0µA 11.000 A 110.00V 1100.0V 110.00mV Manual A 1.1000A 11.000A 110.00A 1100.0A 11000A ADP ADP4 ADP3 ADP2 ADP1 ADP0 Ω Frequency 110.00Ω 1111Hz 1.1000KΩ 11.000KΩ 11.000KHz 110.00KΩ 110.00KHz 1.1000MΩ 1.1000MHz 11.000MΩ 11.000MHz 110.0MΩ 110.00MHz Capacitor 11.000nF 110.00nF 1.1000µF 11.000µF 110.00µF 1.1000mF 11.000mF 110.00mF v1.08 24 06/04/03 ES51918 11,000 Counts Auto DMM 4.3 DIGIT 3 – DIGIT 0 Digit 3 is the second significant digit on the LCD panel, and digit 0 is the least significant digit. Digit 0 1 2 3 4 5 6 7 8 9 Code 0110000 0110001 0110010 0110011 0110100 0110101 0110110 0110111 0111000 0111001 Note: 1. The RS232 code of digit4 is in the packet OPTION1 2. Because the cycle time of measurement for continuity/diode mode is only 50ms, the least significant digit may not be accurate 4.4 STATUS The format of this package shown below. The Judge field is meaningful only when the Function packet indicates Temperature mode. In Temperature mode, judge is 1 if the unit is °F and is 0 of the unit is °C. Sign field indicates whether the minus sign on the LCD panel is on or off. BATT field is one when battery low condition is true. OL indicates input overflow. 0 BIT6 1 BIT 5 1 BIT 4 Judge BIT 3 Sign BIT 2 BATT BIT1 OL BIT 0 4.5 OPTION 1 0 BIT 6 1 BIT 5 1 BIT 4 UL BIT 3 PMAX BIT 2 PMIN BIT1 Digit4 BIT 0 UL field will be 1, only when input frequency is less than 11.1Hz in FR1 range of frequency mode. If PMAX field is 1, PMAX is active and LCD panel display maximum peak value. If PMIN field is 1, PMIN is active and LCD panel display minimum peak value. The digit4 field will be 1, when the MSD on the LCD is one. v1.08 25 06/04/03 ES51918 11,000 Counts Auto DMM 4.6 OPTION 2 This packet contains information on the operation mode of the meter. The format is shown below. The DC field indicates that the meter operates in DC measurement mode, either voltage or current. The AC field indicates that the meter operates in AC measurement mode, either voltage or current. The AUTO field is set to one if the meter operates in automatic mode, and is set to zero when the meter operates in manual mode. 0 BIT 6 1 BIT 5 1 BIT 4 DC BIT 3 AC BIT 2 AUTO BIT 1 VAHZ BIT 0 4.7 CR Carriage returns. The transmitted code is 0001101. 4.8 LF Line feed. The transmitted code is 0001010. 5 Miscellaneous The conditions on which the meter turns on the buzzer include: (1) Changing measurement mode generates one beep. (2) Pressing any of the push functions generates one beep, if the function is valid. (3) Power on and re-power on generate one beep. (4) Input overflow in voltage and current mode generates one beep every 0.3 seconds (or 3.33 beeps per second.) (5) Continuity(diode) check generates a continuous 2KHz beep whenever the measurement is less then 30Ω(30mV) (6) Auto power off generates a 2KHz beep which lasts for 1.5 seconds. The following figures show the output waveform from the BUZOUT pin. 0.5 mS (a) Continuous 2KHz beep v1.08 26 06/04/03 ES51918 11,000 Counts Auto DMM 0.15 sec 0.3 sec (b) 3.33 beep/sec 5.1 LCD Panel S1 S2 S3 S4 S5 S6S7 S12 S17 S8 S9S10 S11 S15 S18 S13 S16 S14 BATT AUTO MANU HOLD BP1 APO DC REL MAX MIN PMAX PMIN ℉ n µ1 µ2 m2 MK ℃ m1 F VA Ω Hz BP2 AC BP3 BP4 RS232 SEG01 SEG02 SEG03 SEG04 SEG05 SEG06 SEG07 SEG08 SEG09 BP1 BP2 BP3 APO AC BATT AUTO DC BC5 F4 E4 DP4 A4 G4 D4 MANU B4 C4 DP3 A3 F3 E3 D3 B3 G3 C3 DP2 HOLD F2 E2 D2 A2 B2 G2 C2 BP4 RS232 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 BP1 BP2 BP3 BP4 F1 E1 DP1 A1 G1 D1 B1 C1 M µ2 m2 K Ω V A Hz ℉ ℃ REL MAX MIN PMAX PMIN n µ1 m1 F Note: The MSD on LCD panel will not shows Zero v1.08 27 06/04/03 ES51918 11,000 Counts Auto DMM LCD Backplane Waveform V- +3.2 V- +3.1 VVV- +3.2 V- +3.1 VVV- +3.2 V- +3.1 VVV- +3.2 V- +3.1 VVV- +3.2 V- +3.1 V- 5.2 LCD display on condition LCD Annunciator V A Ω F Condition In voltage measurement mode, and diode measurement mode. In current measurement mode. In resistance measurement mode, and continuity mode. In capacitance measurement mode. In continuity check mode. In diode mode. In frequency mode. In DC voltage or DC current mode. In AC voltage or AC current mode. When automatic full scale range selection is enabled. In manual mode. When HOLD function is enabled. When Relative function is enabled. When Maximum or Minimum function is enabled. When PMAX or PMIN function is enabled. In capacitor measurement mode and the full scale range is in the order of mF. In capacitor measurement mode and the full scale range is in the order of µF. In capacitor measurement mode and the full scale range is in the order of nF. In voltage or current measurement mode and the full scale range is in the order of 10-3. In current measurement mode and the full scale range id in the order of µA. In resistance measurement mode and the full scale range is in the order of MΩ In resistance measurement mode and the full scale range is in the order of KΩ In temperature measurement mode and when the unit is ℃ In temperature measurement mode and when the unit is ℉ When auto power off function is enabled. When RS232 output is enabled. 28 06/04/03 Hz DC AC AUTO MANU HOLD REL MAX / MIN PMAX / PMIN m1 n m2 M K ℃ ℉ APO RS232 v1.08 µ1 µ2 ES51918 11,000 Counts Auto DMM 5.3 Operating Timing ES51918 incorporates a dual slope ADC with four phases: ZI, AZ, INT and DINT. The timing of each phase are listed below. *Voltage /Current /ohm /ADP measurement: Phase ZI AZ INT DINT Time 20ms 20ms 100ms 110ms P.S. In the DC voltage and ohm measurement with auto mode, if the range is changed, the internal clock rate will increase five times and the new measurement cycle becomes 1/5 times of the original cycle until the range is stable. *Continuity/diode measurement Phase ZI AZ INT DINT *Capacitance measurement: Range 11.000nF 110.00nF 1.1000uF 11.000uF 110.00uF 1.1000mF 11.000mF 110.00mF Total Measurement Time 0.25sec 0.25sec 0.25sec 0.25sec 0.5sec 1.0sec 2.5sec 12.5sec Time 4ms 4ms 20ms 22ms *Frequency measurement In range FR1, the measurement cycle = 0.5 sec In range FR2~FR6, the measurement cycle = 1.05 sec P.S. In the frequency measurement with auto mode, if the range is changed, the internal clock rate will increase ten times and the new measurement cycle becomes 1/10 times of the original cycle until the range is stable. v1.08 29 06/04/03 ES51918 11,000 Counts Auto DMM 6 Test Circuit 4. Current test AGND OVSG 99.5 1K 10K 101K 1.111M D2 D1 1.0u 7.5K 6.2K 7.5K 4.7u 1.0u 0.1u 88M OR1 VR5 VR4 VR3 VR2 ADO ADI ACVL ACVH TEST5 A mA uA V R 1 10M -100mV Voltage input Z1 6V Z2 100 PTC 1.5K 10M OVX 1.111M PTC 1.5K 100 Z1 6V Z2 99.5 1K 10K 101K 1.111M OVH OVSG OR1 VR5 VR4 VR3 VR2 SGND AGND 0V VR1 V R 900 0.01 0.99 9 90 10A mA mA uA uA 100K 100K IVSH IVSL AGND SGND 1. Voltage test 2K 5. Diode test AGND OVH 2. Resistor test VR2 OVSG 6. Low battery 9V BA TT 270K 680K LBAT9 0.1u AGND V- 3. Current test for clamp meter 7. ADP test VA+ -100mV VAADP 100K SGND AGND 8. Frequency test F R E Q RL VR R 100K ADP SGND AGND VA+ VA- ADPin+ ADPin- 200 2.2u PTC 1.5K Fin + Vref - v1.08 30 06/04/03 ES51918 11,000 Counts Auto DMM 7. Application Circuit 7.5V ZI + 10µ 0.1µ 5.6V ZI 3V + 10µ 0.1µ 0.47µ V- 4M µA/mA DGND AGND AGND (100) CVOSC1 OSC2 APOSEL OLSEL BKLIT (85) KEY SLACDC FC5 FC4 FC3 (90) FC2 FC1 LBAT9 SDO C+ (95) µA µA µA mA 0.1µ 100n 470n 90k 30k 100K 100K 100K V+ V+ CREF+ 900 mA 90 CREFCINT (5) mA CAZ 9 BUFF RAZ 10A 0.99 10A IVSH IVSL (10) 0.01 SGND OVX 100 OVH 220p OVSG Ω 1.5K OR1 PTC 99.5 VR5 (15) 1K 10K VR4 V/Ω/ VR3 101K VR2 1.111M 6K TEST5 ACVL (20) 2K ACVH 0.1µ ADI 7.5K 1µ 1µ + ADO 7.5K + 88M D1 D2 4.7µ ADOHZ OPO (25) OPIN+ OPINPWD VRH VR (30) (80) RANGE HOLD REL_ZERO PEAK VAHZ (75) MAX/MIN BKOUT BUZOUT BUZIN ANNUNC (70) BP1 BP2 BP3 BP4 SEG01 (65) SEG02 SEG03 SEG04 SEG05 SEG06 (60) SEG07 SEG08 SEG09 SEG10 SEG11 (55) SEG12 SEG13 SEG14 SEG15 SEG16 5.6V ZI ES51918P V- LCD display ... 91K 1µ 10K + (50) SEG17 SEG18 47n OHMC3 470n OHMC2 RS232 200 2.2µ (45) FREQ SLEEP 47n OHMC CA+ CA- 470n (40) R1K R9K ADP Hz Notes: 1. Most of pins are protected by the ESD protection circuits. However pins, V+, V-, AGND, DGND and VR1 are not protected enough because the parasitic effect must be decrease. Therefore enough external protection is needed for assembling, carrying and keeping. In addition, components connecting to these unprotected pins have to be soldered on board before the IC is soldered. 2. Cp is the compensation capacitor for measuring capacitance. Its value depends on the parasitic capacitor on the PCB board. 3. Light shielding for the diodes and Zeners. 4. Zener diodes in above circuit are used for IC protection, so MUST be soldered on PCB first. VBAR (35) VR1 SGND ADP VAVA+ 100K 10M 10n PMAX 10n PMIN 100K 9K Cp C 1µ + 1K V- 1.5K PTC v1.08 31 06/04/03 ES51918 11,000 Counts Auto DMM 8. Package 1 100 Pin QFP Package W A L b a θ B C D d 2 Dimension Parameters Symbol W L A B C d a D θ Min. Milimeter Typ. Max. Min. Mill Typ. 787.4 551.2 16.7 11.8 25.6 47.2 107.1 98.4 Max. 791.3 551.2 11.8 47.2 107.1 19.90 20.00 20.10 783.5 13.90 14.00 14.10 547.2 0.425 0.20 0.30 0.40 7.9 0.65 1.05 1.20 1.35 41.3 2.57 2.72 2.87 101.2 2.50 o 0 10o v1.08 32 06/04/03