ES51977

ES51977 3 3/4 AUTO EASY 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 function •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 ES51977 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 ES51977 also provides serial data output function. Expensive and bulky mechanical range switches are not required. The other functions are provided for data holding, low battery detection, auto-power-off, 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 800mW 0℃ to 70℃ -25℃ to 125℃ 1 91年11月28日 ES51977 3 3/4 AUTO EASY 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 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℃ 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 Sec V MΩ KΩ HZ 1 -0.5 -0.45 -0.4 2.5 250 40 to 500 40 to 2000 50 - ppm/℃ 2 91年11月28日 ES51977 3 3/4 AUTO EASY 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 91年11月28日 ES51977 3 3/4 AUTO EASY 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 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. 69 70 71 72 BP4 BP3 BP2 BP1 4 91年11月28日 ES51977 3 3/4 AUTO EASY Pin. No Symbol. 73 NC 74 BUZOUT 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 NC NC NC NC OSC1 OSC2 NC KEY NC NC HOLD RANGE FC5 FC4 FC3 FC2 FC1 LBAT9 Description. Buzzer output. Audio frequency (2.0KHz) output which drives a piezoelectric buzzer. Crystal oscillator (input) connection. Crystal oscillator (output) connection. Mode change pin. 93 94 95 96 97 98 99 100 SDO C+ CVVDGND AGND AGND 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 91年11月28日 ES51977 3 3/4 AUTO EASY Pin Configuration A G N D 100 A G N D D S G N V V C CD D- - - +O 95 R L A B AF F F F F N TCCCCCG 912345E 90 H O K L NN E N DCC YC 85 80 OSC2 OSC1 NC NC NC NC BUZOUT NC BP1 BP2 BP3 BP4 100 V+ V+ CH+ CHCIH BUFH CAZH CL+ CLCIL CZAL BUFL IVSH IVSL OVX OVH OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH ADI ADO NC NC NC 5 75 10 70 15 65 20 60 25 55 30 35 S V N VV A G R C RR C HV N1 R D 40 NS TNF S F CLECRE1 ET0 ES 0 Q ET P1 S E G 2 4 45 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 50 S E G 1 8 ANNUNC SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 6 91年11月28日 ES51977 3 3/4 AUTO EASY 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 Current Measurement In the current measurement mode , there are three range selections : 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. Mode Automatic Mode 1 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) 7 91年11月28日 ES51977 3 3/4 AUTO EASY Continuity Check The continuity check is the same as the 399.9Ω range of the resistance measurement mode (manual mode). 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 ES51977 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 91年11月28日 ES51977 3 3/4 AUTO EASY uA mA 450 10A 45 uA uA 100K IVSL 14 100K IVSH 13 mA 4.5 10A 0.495 0.005 AGND mA 10A AGND 100 100K OVX 100 OVH R 15 16 1.5K PTC Z1 6V Z2 R6 R5 R4 R3 R2 R1 100 1K 10K 101K 1.11M 10M OVSG 17 18 19 20 21 22 32 31 V.A.R OR1 VR5 VR4 VR3 VR2 VR1 SGND ES51977 0.22u D1 15K D2 2.2u ADO 27 66M 2.2u 0.1u ADI ACVH ACVL TEST5 26 25 24 23 OVSG INH INL 10K 5K 15K Analog Switch Selection Note : Light shielding for Z1, Z2, D1, D2. 9 91年11月28日 ES51977 3 3/4 AUTO EASY (2) Switch Description Rotary mode : FC1,FC2,FC3,FC4,FC5 Measurement mode depends 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 1Ω 0 1 1 0 Continuity 1 0 1 1Ω 1 0 1 0 Frequency 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 1Ω 0 1 1 0 Continuity 1 0 1 1 Diode 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 10 91年11月28日 ES51977 3 3/4 AUTO EASY 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 1 push > 1 sec 1 push < 1 sec Manual Mode Range up * If HOLD function is enabled，when RANGE function is pressed，the HOLD function will be clear. * The bargraph is not affected by HOLD function. Function Voltage (AC/DC) uA(AC/DC) Auto R1－R5 Manual Ri → Ri+1 (R5→R1) R1 → R2 R2 → R1 R1 → R2 R2 → R1 Fix Ri → Ri+1 (R6→R1) Fix Fix FRi→FRi+1 (FR5→FR1) Control Range 399.9mV ｜ 3999V 399.9uA ｜ 3999uA 39.99mA ｜ 399.9mA 39.99A 399.9Ω ｜ 39.99MΩ 399.9Ω 3.999V 3.999KHZ ｜ 39.99MHZ Initial Range 399.9mV(DC) 3.999V (AC) R1－R2 399.9uA mA(AC/DC) R1－R2 39.99mA 39.99A "OL" 399.9Ω "OL" 399.9Ω "OL" 3.999V 3.999KHZ A(AC/DC) Ω Fix R1－R6 Continuity Diode Frequency Fix Fix FR1－FR5 11 91年11月28日 ES51977 3 3/4 AUTO EASY 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 continue to press the HOLD pin(logic low)then power on the ES51977, all the segments will blight until release the HOLD pin. Auto-Power-off function Once power on the ES51977, the auto-power-off function will be enabled and if the functions are not changed in 30 minutes, the auto-power-off condition will happen and SLEEP pin output will change from +3V to –3V. When poweroff happens, the final data is saved.. If continue to press RANGE or SET or KEY pin then power on the ES51977, 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, 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