ES51967

ES51967 6,600 Counts Auto DMM Features • 6,600 counts LCD display • 100L QFP package • 3V DC power supply • Conversion rate : 3 times/s • Full automatic measurement *Voltage measurement: 660.0mV – 1000V • Sleep state indicative signal output • Re-power on • On-chip buzzer driver • Low battery detection for 3V or 9V battery Description • • • • • • • ES51967 is an integrated analog-to-digital converter (ADC) with 6,600 counts LCD *Current measurement: μA/mA/A display, automatic range selection, and 3V DC *Resistance measurement: 660.0Ω – 66.00MΩ power supply. Automatic range selection is *Capacitance measurement: provided for voltage (AC/DC) measurement, 6.600nF – 66.00mF(6.6sec) resistance measurement, current measurement, *Frequency counter: 660.0Hz – 66.00MHz capacitance measurement, and frequency Current modes for clamp meter with ZERO function counter. Expensive and bulky mechanical Duty cycle measurement: 10.0% – 94.9% (0.66sec) range switches are not required. Other features Diode measurement include relative value display, zero feature for Continuity check DCA clampmeter, VAHZ function, data 4 ADP modes with external reference voltage and holding, maximum and minimum value independent “ADP” segment on LCD panel holding, duty cycle measurement, diode Temperature mode with internal scale translation 0 0 measurement, temperature measurement, circuit from C to F continuity checking, low battery detection, Push functions: auto power off, re-power on, backlight driver, *KEY function buzzer driver and RS232 data output. *Range change function *Relative function *Zero function: DCA for clampmeter only *VAHz function *Data hold function *MAX/MIN function *Back light function • High crest factor signal detection • Band-gap reference voltage output • OL/UL state indicator in ADP modes. • CE selection (DC/AC 1010V, DC/AC 610V) • Serial data output (RS232 format) • LCD segment check when power on • Auto power off (30min/15min) v2.6 1 08/10/06 ES51967 6,600 Counts Auto DMM Application Digital multimeter Clamp meter Thermometer Pin Assignment 80 75 70 65 60 55 VAHZ MAX/MIN VST OSC2 OSC1 BKOUT R_OVH NC ZERO BUZIN OR BUZOUT ANNUNC BP1 BP2 BP3 BP4 SEG01 SEG02 SEG03 SEG04 SEG05 SEG06 SEG07 SEG08 SEG09 SEG10 SEG11 SEG12 50 10 15 20 V2.6 V+ CREF+ CREFCINT CAZ BUFF RAZ IVSH IVSL OVX OHMC OVH OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH ADI ADO ADOHZ VRH VR VA+ VAADP 2 25 5 REL HOLD RANGE CESEL BKSET KEY SLACDC FC5 FC4 FC3 FC2 FC1 LBAT9 SDO CC+ VDGND AGND AGND 85 90 Cyrustek. com.tw 45 40 95 ES51967 35 100 SEG14 SEG15 SEG16 SEG17 APOSEL BKLIT DSHIFT RS232 FREQ SLEEP OHMC2 CSHCSH+ CA+ CAR1K R9K VBAR VR1 OHMC1 08/10/06 ES51967 6,600 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 44 45 V2.6 Symbol V+ CREF+ CREFCINT CAZ BUFF RAZ IVSH IVSL OVX OHMC OVH OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH ADI ADO ADOHZ VRH VR VA+ VAADP SGND OHMC1 VR1 VBAR R9K R1K CACA+ CSH+ CSHOHMC2 SLEEP FREQ RS232 DSHIFT BKLIT Type O I/O I/O O I O O I I I O I I O O O O O I/O O O I O I O I I I I G O I I O O I/O I/O O O O O I I I I Description 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. High current measurement input. Low current measurement input Input high voltage for resistance measurement Filter capacitor connection for resistance mode below 6.600MΩ range. Output connection for resistance measurement Sense low voltage for resistance measurement Reference resistor connection for 660.0Ω range Voltage measurement ÷10000 attenuator(1000V) Voltage measurement ÷1000 attenuator(660.0V) Voltage measurement ÷100 attenuator(66.00V) Voltage measurement ÷10 attenuator(6.600V) 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 band-gap voltage reference. Typically –1.2V Reference input voltage connection. Typically –400mV 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. Filter capacitor connection for resistance mode under 660.0KΩ range. 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, pull to V- to disable the ‘µ2’ or ‘m2’ sign on LCD. 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 under 66.00MΩ range. Filter capacitor connection for resistance mode under 66.00MΩ range. Filter capacitor connection for 6.600MΩ range in resistance mode. 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. Pull to V- to have 0.01MΩ resolution in 66.00MΩ. Pull to DGND or keep it float will change the resolution to 66.0MΩ. Back light function. Pulse low to set BKOUT pin output. 3 08/10/06 ES51967 6,600 Counts Auto DMM 46 APOSEL 47 - 63 SEG17 – SEG01 64 BP4 65 BP3 66 BP2 67 BP1 68 ANNUNC I O O O O O O Auto power off idle time selection. LCD segment line 01 – 17 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. Outputs a 2KHz audio frequency signal for driving piezoelectric buzzer when BUZIN is low. OL/UL state indicator in ADP modes. Origin state is low(V-), it goes to high(DGND) only when the reading is over 6,600 counts. It comes back to low only when the reading is less than 600 counts. It will keep the state when the reading is between 600 and 6600 counts. Pull to V- to enable the BUZOUT. Pulse to V- to enable ZERO function. 69 70 BUZOUT OR O O 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 BUZIN ZERO NC R_OVH BKOUT OSC1 OSC2 VST MAXMIN VAHZ REL HOLD RANGE CESEL BKSET KEY SLACDC FC5 FC4 FC3 FC2 FC1 LBAT9 I I I O 94 95 96 97 98 99 - 100 SDO C+ CVDGND AGND Pull to V- to allow protection resistance increasing at OVH path If BKLIT function is enabled, this pin will change from –3V to +3V for 60 sec. idle time(see BKSET also), once press BKLIT pin again within 60 sec, this pin will change back to –3V. I Crystal oscillator input connection O Crystal oscillator output connection I Set to V- to enable the auto range voltage mode to start from 660.0V range. I Pulse to V- to enable MAX/MIN function. I Pulse to V- to enable VAHZ mode. I Pulse to V- to enable Relative function. I Pulse to V- to enable HOLD function. I Pulse to V- to enable manual mode and manual range selection. I CE selection feature control pin. I Set to V- to change the backligh idle time from 60 sec. to 180 sec. 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 14 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 battery negative terminal. P/G Digital ground. Connecting to battery positive terminal. P/G Analog ground. V2.6 4 08/10/06 ES51967 6,600 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 660Ω measurement Peak to peak backplane drive voltage Counter time base period Open circuit voltage for Ω measurement (except 660Ω) Symbol Test Condition VIDD Normal operation In sleep mode ISS 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, FC2, FC3, FC4, FC5, BKLIT,MAXMIN Between V- pin and RS232 Between GND Pin and SLACDC ±1% ±5% 100KΩ resister Between VRH 0℃1 sec 1 push>1 sec “MAX” active 1push