Datasheet
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
7AV
DD
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 DV
DD
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 V
REF
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