PRODUCT SPECIFICATION
TMC2249A
Table 1. Data Formats and Bit Weighting
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 BIT
-211 210 29 28 27 26 25 24 23 22 21 20 DATA (A11-0-D11-0)
-223 222 221 220 219 218 217 216 215 214 213 212 211 210 29 28 CASCADE INPUT (CAS15-0)
SUM (S15-0)
215 214 213 212 211 210 29 28 27 26 25 24 23 22 21 20 LSW
-223 222 221 220 219 218 217 216 215 214 213 212 211 210 29 28 MSW
Notes: A minus sign indicates the two’s complement sign bit.
RND adds 1 to the 27 position if ACC is low.
Equivalent Circuits and Threshold Levels
VDD
VDD
p
Data or
Control
Input
n
p
Output
n
GND
27014B
Figure 1. Equivalent Digital Input Circuit
GND
27011B
Figure 2. Equivalent Digital Output Circuit
tENA
OE
tDIS 0.5V
Three-State
Outputs
High Impedance
0.5V
2.0V
0.8V
7048A
Figure 3. Threshold Levels for Three-State Measurement
7