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TC7136CLW датащи(PDF) 7 Page - Microchip Technology |
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TC7136CLW датащи(HTML) 7 Page - Microchip Technology |
7 / 22 page © 2002 Microchip Technology Inc. DS21461B-page 7 TC7136/TC7136A 2.0 PIN DESCRIPTIONS Thedescriptionsof the pins arelistedinTable2-1. TABLE 2-1: PIN DESCRIPTION Pin Number (40-Pin PDIP) Normal (Reverse) 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 Backplane drive output. 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 The integrating capacitor should be selected to give the maximum voltage swing that ensures component tolerance buildup will not allow the integrator output to sat- urate. When analog common is used as a reference and the conversion rate is 3 readings per second, a 0.047 µF capacitor may be used. The capacitor must have a low dielectric constant to prevent rollover errors. See Section 6.3, Integrating Capacitor for additional details. 28 (13) VBUFF Integration resistor connection. Use a 180k Ω for a 20mV full scale range and a 1.8M Ω for 2V full scale range. 29 (12) CAZ The size of the auto-zero capacitor influences the system noise. Use a 0.47 µF capacitor for a 200mV full scale and a 0.1 µF capacitor for a 2V full scale. See Section 6.1, Auto-Zero Capacitor for more details. 30 (11) VIN- The low input signal is connected to this pin. 31 (10) VIN+ The 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 operation, or in systems where the input signal is referenced to the power supply. See Section 7.3, Analog Common for more details. It also acts as a reference voltage source. 33 (8) CREF-See Pin 34. |
Аналогичный номер детали - TC7136CLW |
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Аналогичное описание - TC7136CLW |
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