Datasheet
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
CAP1B
CAP1B
AGND
IN1
IN2
AGND
CAP2B
CAP2B
32
31
30
29
28
27
26
25
DCLK
DXMIT
DIN
DV
DD
DGND
DOUT
DVALID
RANGE0 (LSB)
9
10
11
12
13
14
15
16
PIN CONFIGURATION
Top View TQFP
PIN DESCRIPTIONS
PIN LABEL DESCRIPTION
1 CAP1A External Capacitor for Integrator 1A
2 CAP1A External Capacitor for Integrator 1A
3AV
DD
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 DV
DD
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 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.
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