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DDC112U Datasheet(PDF) 5 Page - Texas Instruments |
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DDC112U Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 34 page  DDC112 5 SBAS085B www.ti.com CAP1A CAP1A AV DD NC NC TEST CONV CLK CAP2A CAP2A V REF AGND NC NC RANGE2 (MSB) RANGE1 1 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 DDC112Y PIN CONFIGURATION Top View TQFP PIN DESCRIPTIONS PIN LABEL DESCRIPTION 1 CAP1A External Capacitor for Integrator 1A 2 CAP1A External Capacitor for Integrator 1A 3AVDD Analog Supply, +5V Nominal 4 NC No Connection 5 NC No Connection 6 TEST Test Control Input. When HIGH, a test charge is applied to the A or B integrators on the next CONV transition. 7 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 text). 8 CLK System Clock Input, 10MHz Nominal 9 DCLK Serial Data Clock Input. This input operates the serial I/O shift register. 10 DXMIT Serial Data Transmit Enable Input. When LOW, this input enables the internal serial shift register. 11 DIN Serial Digital Input. Used to cascade multiple DDC112s. 12 DVDD Digital Supply, +5V Nominal 13 DGND Digital Ground 14 DOUT Serial Data Output, Hi-Z when DXMIT is HIGH PIN LABEL DESCRIPTION 15 DVALID Data Valid Output. A LOW value indicates valid data is available in the serial I/O register. 16 RANGE0 Range Control Input 0 (least significant bit) 17 RANGE1 Range Control Input 1 18 RANGE2 Range Control Input 2. (most significant bit) 19 NC No Connection 20 NC No Connection 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. 29 IN1 Input 1: analog input for Integrators 1A and 1B. The integrator that is active is set by the CONV input. 30 AGND Analog Ground 31 CAP1B External Capacitor for Integrator 1B 32 CAP1B External Capacitor for Integrator 1B |
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