ES51988 3 3/4 AUTO REL/MAX/MIN Features: •Full Automatic measurement •3 3/4 digits display •Frequency measurement (40M HZ) •Rotary or push setting mode •Auto-power-off then hold the final data •Rotary or push re-power on function •Data hold, MAX/MIN hold, Relative data when this function is pressed •Low battery detect (3V & 9V) •On chip buzzer driver •3V DC power supply •Internal AC to DC conversion OP AMP If non_AC mode , OP will become unit gain buffer. •Serial Data Output (RS232 format) •LCD segment check •100 Pin flat-package Description: The ES51988 is an integrated analogto-digital converter (ADC)with 3 3/4 digits and 42-segment bargraph LCD display, automatic range, and 3V battery power supply. Automatic range selection is provided for voltage (AC/DC) measurement, ohm measurement, current(uA and mA) measurement,and frequency counter. The ES51988 also provides serial data output function. Expensive and bulky mechanical range switches are not required. The other functions are provided for MAX and MIN holding and current value display, data holding, Relative data and reference value display, low battery detection, auto-poweroff, diode measurement, continuity checking. Absolute Maximum Ratings Characteristics Supply Voltage (V- to AGND) Analog Input Voltage Digital Input Power Dissipation Flat Package Operating Temperature Storage Temperature Ratings -4V V+ to VV- to DGND 500mW 0℃ to 70℃ -25℃ to 125℃ 1 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN Electrical Characteristics TA=25℃,V- = -3V Symbol Parameter Test Condition VPower Supply Idd Operating Supply Current Normal Power On Iss Auto-power-off REV Rollover Error (Voltage) 10M input REB Rollover Error Resistor (Bargraph) NLV Nonlinearity Best Case (Voltage) Straight Line NLB Nonlinearity (Bargraph) Input Leakage Low Battery Flag Voltage V- to AGND Zero Input Reading 10MΩInput Resistor VREF Reference Voltage and 400Ω 100KΩ Between measurement VRH and AGND Peak to Peak Backplane Drive -3.2≦V-≦-2.2 Voltage Counter Time Base Period fosc=4MHz Open Circuit Voltage for Ω Ω and Continuity Measurement(except 400Ω) Function Pull High to 0V Resistance FC1,FC2,FC3,FC4 FC5,RANGE,HOLD, MAX/MIN,REL Pull High to 0V Resistance KEY, SET AC Frequency Response ± 0.5﹪Error (4V range) ± 2.5﹪Error TCRF Reference Voltage Temperature Coefficient 100KΩBetween VRH and AGND 0℃＜TA＜70℃ 2 Min. Typ. Max. Count -3.5 -3.0 -2.2 Volt 1.0 1.5 mA 0.1 5 uA - ± 0.1 ﹪F.S. - - ± 0.5 ﹪F.S. - - ± 0.1 ﹪F.S. - - ± 0.5 ﹪F.S. 1 10 pA -2.5 -2.3 -2.1 V -000 000 +000 Count -1.3 -1.2 -1.1 V 2.85 3.0 3.15 V 1 -0.5 -0.45 -0.4 Sec V - 2.5 - MΩ - 250 40 to 500 40 to 2000 - KΩ HZ 50 - - ppm/℃ 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN 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 Symbol V+ V+ CH+ CHCIH BUFH CAZH CL+ CLCIL CAZL BUFL IVSH IVSL OVX OVH OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH ADI ADO NC NC NC SGND VR1 NC VR VRH ACVR NC Description Positive supply voltage,output of on-chip DC-DC converter. Positive supply voltage,output of on-chip DC-DC converter. High speed positive connection for reference capacitor. High speed negative connection for reference capacitor. High speed integrator output. Connected to integration capacitor. Integration resistor connection for high speed buffer output. High speed auto-zero capacitor connection High resolution positive connection for reference capacitor. High resolution negative connection for reference capacitor. High resolution integrator output. Connected to integration capacitor. High resolution auto-zero capacitor connection. Integration resistor connection for high resolution buffer output. High level current measurement input. Low level current measurement input Input high voltage for resistance measurement. Output connection for resistance measurement. Sense low voltage for resistance measurement. Reference resistor connection for 399.9Ωrange. Voltage measurement ÷ 10000 attenuator (3999V). Voltage measurement ÷ 1000 attenuator (399.9V). Voltage measurement ÷ 100 attenuator (39.99V). Voltage measurement ÷ 10 attenuator (3.999V). Test pin 5. Negative output of AC to DC converter. Positive output of AC to DC converter. Negative input of internal AC to DC OP AMP. Output of internal AC to DC OP AMP. Signal ground. Unknown voltage input . Reference input voltage connection. Typically -100 mV. Output of band-gap voltage reference. Typically -1.2 V. Optional pin. When connected to -3V,ACV without 400mV range. 3 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN Pin. No Symbol. 38 SLEEP 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 TEST1 NC FREQ SET F100 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 ANNUNC 69 70 71 72 BP4 BP3 BP2 BP1 Description When auto-power-off happen, this pin output will change from +3V to –3V. When re-power on happens, this pin output will change back to +3V. Test pin 1. Frequency counter input, offset to 1/2(V-). Input to set serial data output. Pulse low to make this function active. 100 HZ square wave output. LCD Segment line 24. LCD Segment line 23. LCD Segment line 22. LCD Segment line 21 LCD Segment line 20. LCD Segment line 19. LCD Segment line 18. LCD Segment line 17. LCD Segment line 16. LCD Segment line 15. LCD Segment line 14. LCD Segment line 13. LCD Segment line 12. LCD Segment line 11. LCD Segment line 10. LCD Segment line 9. LCD Segment line 8. LCD Segment line 7. LCD Segment line 6. LCD Segment line 5. LCD Segment line 4. LCD Segment line 3. LCD Segment line 2. LCD Segment line 1. Square-wave output at the backplane frequency, synchronized to BP1. ANNUNC can be used to control display annunciator. Connecting an LCD segment to ANNUNC and turns it on; connecting an LCD segment to its backplane and turns it off. LCD Backplane 4. LCD Backplane 3. LCD Backplane 2. LCD Backplane 1. 4 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN Pin. No Symbol. 73 NC 74 BUZOUT 75 76 77 78 79 80 81 82 83 84 85 86 NC NC NC NC OSC1 OSC2 NC KEY REL MAX/MIN HOLD RANGE 87 88 89 90 91 92 FC5 FC4 FC3 FC2 FC1 LBAT9 93 94 95 96 97 98 99 100 SDO C+ CVVDGND AGND AGND Description. Buzzer output. Audio frequency (2.0KHz) output which drives a piezoelectric buzzer. Crystal oscillator (input) connection. Crystal oscillator (output) connection. Mode change pin. Input to get relative display. Pulse low to make this function active. Input to set MAX/MIN display. Pulse low to make this function active. Input to hold display. Pulse low to make this function active. Input to set automatic/manual mode and manual range selection. Pulse low to make this function active. Switch 5 for function selection. Switch 4 for function selection. Switch 3 for function selection. Switch 2 for function selection. Switch 1 for function selection. Low battery voltage setting. If used 3V battery, connected this pin to AGND, the default low battery voltage will be –2.3V. If used 9V battery, when the input voltage is small than VRH(-1.2V), the low battery annunciator will be display. Serial data output. Positive capacitor connection for on-chip DC-DC converter. Negative capacitor connection for on-chip DC-DC converter. Negative supply voltage.Connecting to battery negative terminal. Negative supply voltage.Connecting to battery negative terminal. Digital ground,connected to battery positive terminal. Analog ground. Analog ground. 5 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN Pin Configuration A G N D A G N D D S G N V V C C D D - - - + O CIL CZAL BUFL IVSH IVSL OVX OVH OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH ADI ADO NC NC NC 90 95 100 V+ V+ CH+ CHCIH BUFH CAZH CL+ CL- L R A B A F F F F F N T C C C C C G 9 1 2 3 4 5 E H O L D M A X / M R K I E E N N L Y C 85 80 5 75 10 70 15 65 20 60 25 30 55 35 S V N V V A G R C R R C N 1 H V D R 40 50 45 N S T N F S F C L E C R E 1 E T 0 E S Q 0 E T P 1 6 S E G 2 4 S E G 2 3 S E G 2 2 S E G 2 1 S E G 2 0 S E G 1 9 S E G 1 8 92年8月4日 OSC2 OSC1 NC NC NC NC BUZOUT NC BP1 BP2 BP3 BP4 ANNUNC SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 ES51988 3 3/4 AUTO REL/MAX/MIN Operation Mode (1) Measurement Description Voltage Measurement Resistive divider is automatically changed to provide in range reading for 399.9mV to 3999V full scale reading. The following table shows the various full scale range. Range VR1 VR2 VR3 VR4 VR5 Full scale 399.9 mV 3.999 V 39.99 V 399.9 V 3999 V Resistive Ratio 1 , 1/1 R2/(R1+R2) , 1/10 R3/(R1+R3) , 1/100 R4/(R1+R4) , 1/1000 R5/(R1+R5) , 1/10000 Resistance Measurement Resistive divider is automatically changed to provide the proper range. The following table shows the various full scale range. Range OR1 OR2 OR3 OR4 OR5 OR6 Full Scale 399.9 Ω 3.999 KΩ 39.99 KΩ 399.9 KΩ 3.999 MΩ 39.99 MΩ Reference Resistor R6(100Ω) R5(1KΩ) R4(10KΩ) R1||R3(=100KΩ) R1||R2(=1MΩ) R1(10MΩ) Current Measurement In the current measurement mode , there are three range selections : Mode Automatic Mode 1 Range Selection Full Scale uA 399.9 uA 3999 uA Automatic Mode 2 mA 39.99 mA 399.9 mA Manual Mode A 39.99 A When the mode changes among (uA, mA, A), the original AC/DC state will keep. 7 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN Continuity Check The continuity check is the same as the 399.9Ω range of the resistance measurement mode (manual mode). If the bargraph number <=3 ,there will 2.0 KHz signal comes out from BUZOUT pin, if the bargraph number >=4, there will be no beep exist. Diode Measurement Use the DCV 3.999V range of voltage measurement mode (manual mode ). If the test circuit is open or the device (diode) under test is larger than 2V, the LCD display will show "OL", but the bargraph will show the real detected voltage. Frequency Counter The timebase of ES51988 is derived by a clock oscillator. The timebase of counter is : Tcounter = 4,000,000 Fosc Thus , the counter will operate with a 1 second timebase when a 4MHz oscillator is used. For accurate frequency measurement,a crystal oscillator is recommended. The frequency counter can automatically or manually select the proper range. Autorange operation extends over five decades from 1 Hz to 39.99MHz. Range FR1 FR2 FR3 FR4 FR5 Full Scale 3.999 KHZ 39.99 KHZ 399.9 KHZ 3.999 MHZ 39.99 MHZ 8 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN uA mA uA 450 10A 45 uA 100K IVSL 14 mA 100K IVSH 13 4.5 10A 0.495 0.005 mA AGND Z1 6V Z2 V.A.R R6 R5 R4 R3 R2 R1 D2 2.2u 100 OVH 16 OVSG 17 OR1 VR5 VR4 VR3 VR2 VR1 SGND 18 19 20 21 22 32 31 0.1u 15K ES51988 ADO 27 66M 2.2u 15K 10K 15 100 1K 10K 101K 1.11M 10M 0.22u D1 100K OVX 1.5K PTC R 100 AGND 10A ADI 26 ACVH 25 ACVL TEST5 24 23 INH OVSG INL 5K Analog Switch Selection Note : Light shielding for Z1, Z2, D1, D2. 9 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN (2) Switch Description Rotary mode : FC1,FC2,FC3,FC4,FC5 Measurement mode are depend on the logic levels of FC1, FC2, FC3,FC4 FC5 and KEY : When FC5=1 FC1 FC2 FC3 FC4 Mode 1 1 0 0 DC V 1 1 1 0 DC uA 1 1 0 1 DC mA 1 1 1 1 DC A 0 1 1 1 Ω 0 1 1 0 Continuity 1 0 1 1 Ω 1 0 1 0 Frequency Push mode(KEY) DC V — AC V DC uA — AC uA DC mA — AC mA DC A — AC A Ω— Continuity Continuity — Diode Ω— Continuity — Diode When FC5=0, KEY is disabled. FC1 FC2 FC3 FC4 Mode 1 1 0 0 ACV 1 1 1 0 AC uA 1 1 0 1 AC mA 1 1 1 1 ACA 0 1 1 1 Ω 0 1 1 0 Continuity 1 0 1 1 Diode 1 0 1 0 Frequency 10 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN Push mode RANGE The mode selection of Auto-mode and Manual-mode is determined by RANGE pin. The following is the operating flow chart of Auto-mode and Manual-mode. 1 push < 1 sec Automatic Mode Manual Mode 1 push > 1 sec Range up 1 push < 1 sec * If HOLD, MAX/MIN, REL function is enabled，when RANGE function is pressed，the enabled function will be clear. * The bargraph is not affected by HOLD, MAX/MIN, REL function. Function Voltage (AC/DC) Auto R1－R5 Manual Ri → Ri+1 (R5→R1) A(AC/DC) Ω Fix R1－R6 Fix Ri → Ri+1 (R6→R1) Continuity Fix Fix Control Range 399.9mV ｜ 3999V 399.9uA ｜ 3999uA 39.99mA ｜ 399.9mA 39.99A 399.9Ω ｜ 39.99MΩ 399.9Ω uA(AC/DC) R1－R2 R1 → R2 R2 → R1 Diode Fix Fix 3.999V Frequency FR1－FR5 FRi→FRi+1 (FR5→FR1) 3.999KHZ ｜ 39.99MHZ mA(AC/DC) R1－R2 R1 → R2 R2 → R1 11 Initial Range 399.9mV(DC) 3.999V (AC) 399.9uA 39.99mA 39.99A "OL" 399.9Ω "OL" 399.9Ω "OL" 3.999V 3.999KHZ 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN HOLD : 1 push RESET (Automatic) Data Hold (1) Under auto mode, press the HOLD function, the mode will change to manual mode and stay at the same scale range. (2) If HOLD function is enabled, MAX/MIN, REL function is disabled. But if MAX/MIN, REL function is pressed first, the HOLD function still can active. (3) If continue to press the HOLD pin(logic low)then power on the ES51988 , all the segments will blight until release the HOLD pin. MAX/MIN : 1 push < 1 sec RESET (AUTOMATIC) 1 push > 1 sec 1 push > 1 sec "Min" active min value "MAX" active max value 1 push > 1 sec "MAX MIN" blink current value 1 push <1 sec (1) If MAX/MIN function is enaled, REL function is disabled, or if REL function is enabled，MAX/MIN function is disabled. (2) The sequent order is MAX value, MIN value, Current value. REL : RESET (AUTOMATIC) 1 push <1 sec 1 push >1 sec 1 push >1 sec 1 push<1 sec "REL" blink the Di(N) value "REL" active the relative value * When REL function is enabled : Display = Di(N+K) - Di(N) , K = 0,1,2,3, ... Di(N) : Input reading when REL function active. Di(N+K) : Next K step input reading. * If the input value Di(N) or Di(N+K) ≧ (± 4000), the relative value will display “OL”. 12 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN Auto-Power-off function: Once power on the ES51988, the auto-power-off function will be enabled and if the functions are not changed in 30 minutes, the auto-power-off condition will be happened and SLEEP pin output will change from +3V to –3V. When power-off happens, the final data is saved. If continue to press anyone of the pushed function (except HOLD pin)then power on the ES51988, the auto-power -off function will be disabled , and LCD segment "APO" will be turned off. (3) Buzzer The BUZZER turns on in the following condition : •1 beep : Measurement function changed ,power and re-power on , RANGE, HOLD, MAX/MIN, REL, SET or KEY are pushed. • 3.3 beeps : Input reading overrange. (except diode,ohm,continuity, frequency function used) • 2.0 KHZ continue: Continue check (Bargraph number<=3). • 2.0 KHZ continue 1.5 sec : Auto-power-off. BUZZER output waveform : 2.0 KHz ( continued ) 0.5 mS beeps (3.33 beeps/sec) 0.15 sec 0.3 sec 13 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN (4) Serial Data Output The serial data is output two times from SDO pin on each A/D conversion cycle.The data format satisfy JIS 7BIT transmission code and the baud rate is 2400,it means the receiver terminal can use RS-232 interface to read data . single package 0V -3V p P 1 D0 ~D6 0 LSB MSB A single package include a start bit(0),D0~D6(7 bit), a parity check bit(odd) and a stop bit(1).All the data stream is consist of 110× 2 bits. The high and low voltage levels correspond to DGND and V- respectively. SDO remains at 1 (high) when it is inacetive. Hence the start bit(0) could be used as the triggering signal to begin the reading process. all package p 1 0 0 range p 1 0 digit3 digit2 p 1 0 0 digit1 p 1 0 p 1 0 option1 status CR p 1 option2 p 1 0 0 p 1 function digit0 p 1 0 0 p 1 p 1 LF Digit0 ~ 3 data is exactly the receiver display number,but the status, function,range, option1,option2 data all need written program to judge what the data mean. Note : LSB bit is sent first,then MSB bit. 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. 14 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN RANGE : Range 0110000 0110001 0110010 0110011 0110100 0110101 V 400mV 4V 40V 400V 4000V mA 40mA 400mA UA 400uA 4000uA Ohm 400 Ohm 4K Ohm 40K Ohm 400K Ohm 4M Ohm 40M Ohm Frequency 4K HZ 40K HZ 400K HZ 4M HZ 40M HZ Because Continuity,Diode, and Current(A) measurement range are all fixed,so they are all the first code 0110000. DIGIT0 ~ 3 : Digit 0110000 0110001 0110010 0110011 0110100 0110101 0110110 0110111 0111000 0111001 Display data 0 1 2 3 4 5 6 7 8 9 If the input value is over-range(OL),the reading data DIGIT3=4,DIGIT2=0, DIGIT1=0,DIGIT0=0,but under the frequency mode,DIGIT0~3 output the measured value. FUNCTION : The definition code is not the same as FC1 ~ FC4. Function 0111111 0111110 0111101 0111100 0110111 0110110 0111011 0111010 Measurement mode A uA mA Voltage Ω Continuity Diode Frequency 15 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN STATUS : 0 BIT7 1 BIT6 1 BIT5 BIT4 BATT BIT3 0 BIT2 OL BIT1 － : "1" is for the negative(-). BATT : "1" is for the battery voltage is less than 2.3V± OL : "1" is for the input voltage over-range. 0.2V. OPTION1 : 0 BIT7 1 BIT6 1 BIT5 1 BIT6 1 BIT5 0 BIT4 0 BIT3 0 BIT2 0 BIT1 DC/AC AUTO MAN BIT4 BIT3 BIT2 APO BIT1 OPTION2 : 0 BIT7 DC/AC : "1" is for the DC mode and Ω, Diode, Continuity, ADP, Frequency Function, "0" is for the AC mode. AUTO : "1" is for auto range. MAN : "1" is for the manual range. APO : "1" is for the auto-power-off function enabled. CR(BACK) : Transmission code "0001101". LF(LINE FEED) : Transmission code "0001010". 16 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN TEST CIRCUIT 1 Voltage 4 Current AGND OVSG 100 1K 10K 101K 1.11M D1 D2 1.0u 1.0u 0.47u VR2 88M 10A ADI ACVH ACVL TEST5 15K 10K SGND ADO 0.1u 15K AGND OR1 VR5 VR4 VR3 5K 0.005 10A 0.495 mA mA 4.5 45 mA V R 1 uA uA 100K uA 100K 450 V R 10M -100mV Voltage 5 Frequency 2 Resistor F R E Q OVX PTC 1.5K 200 2.2u 100 Z1 6V Z2 OVH OVSG 100 1K 10K 101K 1.11M PTC OR1 VR5 VR4 VR3 1.5K VFin VR2 SGND AGND 6 Low battery 3 Diode AGND 100 Z1 6V Z2 OVH BA TT ER Y PTC 1.5K 10M 1.11M ES51988 9V VR1 VR2 680K LBAT9 0.1u 270K AGND V- 0V OVSG 17 92年8月4日 IVSH IVSL ES51988 3 3/4 AUTO REL/MAX/MIN APPLICATION CIRCUIT 7.5V ZI 5.6V ZI 3V 0.1u 10u + 0.1u + -3V 0.1u 10u V+ V+ AGN D 0.01u 0.022u 200K 10A 0.047u 0.005 10A 0.495 mA 4.5 mA 45 mA uA 0.1u 0.22u 0.47u 200K uA 100K uA 100K 450 A G N D F F F F F R H C C C C C A O 1 2 3 4 5 N L G D E D V V C C S L G - - - + D B O A N T D 9 B U FH C A ZH C L+ C LC IL C ZA L M R K A E E X L Y / M I N 4M HZ O SC 2 O SC 1 5.6V ZI B P1 B U FL B P2 IV S H L C D IV S L D I S P L A Y OVH PTC O V SG Z1 6V 100 1K 10K 101K 1.11M D1 D2 1.0u 1.0u 0.47u 0.1u 22K 22K 10K 5K O R1 V R5 V R4 V R3 V R2 ADO 88M ADI A CV H ACVL TE ST 5 -3V B U ZO U T 100K 0.1u OVX 100 1.5K R CH+ CHC IH A G N D S G V N R D 1 S L E E P V V R R H 10M 91k 10k + 1u S E S G E 2 T 4 F R E Q 200 2.2u PTC S E G 2 3 4.7n 1.5K -3V C 1815 N PN Fin -3V Note: In order to prevent IC from damaging by inappropriate operation, the Zener diodes MUST be required as protection. 18 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN The Other (1) LCD pin assignment BP1 BP2 BP3 BP4 SEG1 SEG2 SEG3 SEG4 SEG5 RS232 bar2 bar4 bar6 bar8 bar0 bar1 bar3 bar5 bar7 barAUTO MANU e3 － DC BATT f3 AC AP0 SEG6 bar9 d3 g3 a3 BP1 BP2 BP3 BP4 SEG8 bar13 bar12 p3 REL SEG13 SEG14 bar22 bar24 bar21 bar23 p2 e1 MAX f1 BP1 BP2 BP3 BP4 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 bar25 bar27 bar29 bar31 bar32 bar34 bar36 d1 bar26 bar28 bar30 d0 bar33 bar35 g1 c1 p1 e0 g0 c0 M a1 b1 MIN f0 a0 b0 u BP1 BP2 BP3 BP4 SEG9 SEG10 SEG11 bar15 bar16 bar18 bar14 d2 bar17 e2 g2 c2 f2 a2 b2 SEG12 bar20 bar19 px HOLD SEG7 bar11 bar10 c3 b3 SEG22 SEG23 SEG24 bar38 bar40 HZ bar37 bar39 Ω K V A m NOTE : 1 : "bar0" is normally ON. 2 : "px" is always OFF(not used). 19 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN BATT APO REL HOLD MAX MIN RS232 DC AC umVA MKΩHZ AUTO MANU LCD Display Panel Backplane Waveform (Frequency = 62.5 HZ) (V-)+3V ANNUNC V(V-)+3V BP1 V(V-)+3V BP2 V(V-)+3V BP3 V(V-)+3V BP4 V- 20 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN (2) LCD Display ON Condition LCD Annunciator "BATT" "DC" "AC" "-" "AUTO" "MANU" "REL" "HOLD" "MAX" "MIN" " "＆"Ω" " "＆"V" "mV" "umA" "MKΩ" "MKHZ" "APO" "RS232" Bargraph Low battery is detected. DC voltage and DC current functions are used. AC voltage and AC current functions are used. DC voltage and current function. Automatic mode is used. Manual mode is used. REL function is used. HOLD function is used. MAX function is used. MIN function is used. Continuity-check is used. Diode measurement is used. AC/DC voltage function is used. AC/DC current function is used. Ω measurement function is used. Frequency counter is used. Auto-power-off function is used. Serial data output is used. Bargraph annunciator is only depend on input reading . (3) .High Resolution and High Speed(Bargraph) time Mode ZI AZ INT DEINT High Current(I) Measurement 100m sec 150m sec 100m sec 200m sec Resolution High Speed Other Measurement Current(I) Other Measurement (V,R) Measurement (V,R) 100m sec 10m sec 10m sec 150m sec 15m sec 15m sec 100m sec 10m sec 10m sec 400m sec 20m sec 40m sec 21 92年8月4日 ES51988 3 3/4 AUTO REL/MAX/MIN Package 1 100 Pin QFP Package W A L b a θ B 2 D C d Dimension Paramenters Symbol W L A B C d a D θ Min. Milimeter Typ. Max. Min. 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 22 Mill Typ. Max. 787.4 551.2 16.7 11.8 25.6 47.2 107.1 98.4 791.3 551.2 11.8 47.2 107.1 92年8月4日