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TC7106ACKW Arkusz danych(PDF) 6 Page - Microchip Technology |
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TC7106ACKW Arkusz danych(HTML) 6 Page - Microchip Technology |
6 / 26 page TC7106/A/TC7107/A DS21455B-page 6 © 2002 Microchip Technology Inc. 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin Number (40-Pin PDIP) Normal Pin No. (40-Pin PDIP) (Reversed Symbol Description 1 (40) V+ Positive supply voltage. 2(39) D1 Activates the D section of the units display. 3(38) C1 Activates the C section of the units display. 4(37) B1 Activates the B section of the units display. 5(36) A1 Activates the A section of the units display. 6(35) F1 Activates the F section of the units display. 7(34) G1 Activates the G section of the units display. 8(33) E1 Activates the E section of the units display. 9(32) D2 Activates the D section of the tens display. 10 (31) C2 Activates the C section of the tens display. 11 (30) B2 Activates the B section of the tens display. 12 (29) A2 Activates the A section of the tens display. 13 (28) F2 Activates the F section of the tens display. 14 (27) E2 Activates the E section of the tens display. 15 (26) D3 Activates the D section of the hundreds display. 16 (25) B3 Activates the B section of the hundreds display. 17 (24) F3 Activates the F section of the hundreds display. 18 (23) E3 Activates the E section of the hundreds display. 19 (22) AB4 Activates both halves of the 1 in the thousands display. 20 (21) POL Activates the negative polarity display. 21 (20) BP/GND LCD Backplane drive output (TC7106A). Digital Ground (TC7107A). 22 (19) G3 Activates the G section of the hundreds display. 23 (18) A3 Activates the A section of the hundreds display. 24 (17) C3 Activates the C section of the hundreds display. 25 (16) G2 Activates the G section of the tens display. 26 (15) V- Negative power supply voltage. 27 (14) VINT Integrator output. Connection point for integration capacitor. See INTEGRATING CAPACITOR section for more details. 28 (13) VBUFF Integration resistor connection. Use a 47k Ω resistor for a 200mV full scale range and a47k Ω resistor for 2V full scale range. 29 (12) CAZ The size of the auto-zero capacitor influences system noise. Use a 0.47 µF capacitor for 200mV full scale, and a 0.047 µF capacitor for 2V full scale. See Section 7.1 on Auto-Zero Capacitor for more details. 30 (11) VIN- The analog LOW input is connected to this pin. 31 (10) VIN+ The analog HIGH input signal is connected to this pin. 32 (9) ANALOG COMMON This pin is primarily used to set the Analog Common mode voltage for battery opera- tion or in systems where the input signal is referenced to the power supply. It also acts as a reference voltage source. See Section 8.3 on ANALOG COMMON for more details. 33 (8) CREF- See Pin 34. 34 (7) CREF+A 0.1µF capacitor is used in most applications. If a large Common mode voltage exists (for example, the VIN- pin is not at analog common), and a 200mV scale is used, a 1 µF capacitor is recommended and will hold the rollover error to 0.5 count. 35 (6) VREF- See Pin 36. |
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