参数资料
型号: TMC2249AH5C
厂商: FAIRCHILD SEMICONDUCTOR CORP
元件分类: DSP Peripheral
英文描述: 12-BIT, DSP-MIXER, PPGA120
封装: PLASTIC, PGA-120
文件页数: 16/18页
文件大小: 138K
代理商: TMC2249AH5C
TMC2249A
PRODUCT SPECIFICATION
REV. 1.0.2 7/6/00
7
Table 1. Data Formats and Bit Weighting
Notes:
A minus sign indicates the two’s complement sign bit.
RND adds 1 to the 27 position if ACC is low.
15
14
13
12
11
10
987654321
0
BIT
-2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
1
2
0
DATA (A11-0-D11-0)
-2
23
2
22
2
21
2
20
2
19
2
18
2
17
2
16
2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
CASCADE INPUT (CAS15-0)
SUM (S15-0)
2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
1
2
0
LSW
-2
23
2
22
2
21
2
20
2
19
2
18
2
17
2
16
2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
MSW
Equivalent Circuits and Threshold
Levels
Figure 1. Equivalent Digital Input Circuit
Figure 2. Equivalent Digital Output Circuit
Data or
Control
Input
VDD
p
n
GND
VDD
p
n
GND
Output
Figure 3. Threshold Levels for Three-State Measurement
2.0V
0.8V
tDIS
tENA
Three-State
Outputs
OE
High Impedance
0.5V
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