tmc2249a Fairchild Semiconductor, tmc2249a Datasheet - Page 7

• Manufacturer Part Number: tmc2249a
• Description: Digital Mixer 12 X 12 Bit, 60 Mhz
• Manufacturer: Fairchild Semiconductor

TMC2249A
Table 1. Data Formats and Bit Weighting
Notes:
Equivalent Circuits and Threshold
Levels
REV. 1.0.2 7/6/00
-2
-2
2
15
15
23
23
A minus sign indicates the two’s complement sign bit.
RND adds 1 to the 2
2
2
2
14
22
14
22
Figure 1. Equivalent Digital Input Circuit
Data or
Control
Input
13
2
2
2
21
13
21
12
2
2
2
20
12
20
GND
7
-2
11
2
2
2
position if ACC is low.
19
11
19
11
10
2
2
2
2
OE
Three-State
Outputs
10
18
10
18
Figure 3. Threshold Levels for Three-State Measurement
2
2
2
2
9
17
17
V
9
9
DD
p
n
2
2
2
2
8
16
16
8
8
2
2
2
2
7
15
15
7
7
t
DIS
2
2
2
2
6
14
14
6
6
0.5V
2
2
2
2
5
0.5V
13
13
5
5
High Impedance
2
2
2
2
4
12
12
4
4
2
2
2
2
3
Figure 2. Equivalent Digital Output Circuit
11
11
3
3
2
2
2
2
2
10
10
2
2
t
ENA
2
2
2
2
1
1
9
1
9
2.0V
0.8V
GND
V
SUM (S
2
2
2
2
0
DD
0
8
0
8
p
n
BIT
DATA (A
CASCADE INPUT (CAS
LSW
MSW
15-0
PRODUCT SPECIFICATION
)
11-0
-D
11-0
Output
)
15-0
)
7