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DDC112 Datasheet(PDF) 4 Page - Texas Instruments |
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DDC112 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 35 page DDC112 4 SBAS085B www.ti.com PIN DESCRIPTIONS PIN LABEL DESCRIPTION 1 IN1 Input 1: analog input for Integrators 1A and 1B. The integrator that is active is set by the CONV input. 2 AGND Analog Ground 3 CAP1B External Capacitor for Integrator 1B 4 CAP1B External Capacitor for Integrator 1B 5 CAP1A External Capacitor for Integrator 1A 6 CAP1A External Capacitor for Integrator 1A 7AVDD Analog Supply, +5V Nominal 8 TEST Test Control Input. When HIGH, a test charge is applied to the A or B integrators on the next CONV transition. 9 CONV Controls which side of the integrator is connected to input. In continuous mode; CONV HIGH → side A is integrating, CONV LOW → side B is integrating. CONV must be synchronized with CLK (see Figure 2). 10 CLK System Clock Input, 10MHz Nominal 11 DCLK Serial Data Clock Input. This input operates the serial I/ O shift register. 12 DXMIT Serial Data Transmit Enable Input. When LOW, this input enables the internal serial shift register. 13 DIN Serial Digital Input. Used to cascade multiple DDC112s. 14 DVDD Digital Supply, +5V Nominal 15 DGND Digital Ground 16 DOUT Serial Data Output, Hi-Z when DXMIT is HIGH 17 DVALID Data Valid Output. A LOW value indicates valid data is available in the serial I/O register. 18 RANGE0 Range Control Input 0 (least significant bit) 19 RANGE1 Range Control Input 1 20 RANGE2 Range Control Input 2 (most significant bit) 21 AGND Analog Ground 22 VREF External Reference Input, +4.096V Nominal 23 CAP2A External Capacitor for Integrator 2A 24 CAP2A External Capacitor for Integrator 2A 25 CAP2B External Capacitor for Integrator 2B 26 CAP2B External Capacitor for Integrator 2B 27 AGND Analog Ground 28 IN2 Input 2: analog input for Integrators 2A and 2B. The integrator that is active is set by the CONV input. PIN CONFIGURATION Top View SO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 IN2 AGND CAP2B CAP2B CAP2A CAP2A V REF AGND RANGE2 (MSB) RANGE1 RANGE0 (LSB) DVALID DOUT DGND IN1 AGND CAP1B CAP1B CAP1A CAP1A AV DD TEST CONV CLK DCLK DXMIT DIN DV DD DDC112U |
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