Datasheet

TLC3544, TLC3548
5-V ANALOG, 3-/5-V DIGITAL, 14-BIT, 200-KSPS, 4-/8-CHANNELS SERIAL
ANALOG-TO-DIGITAL CONVERTERS WITH 0-5 V (PSEUDODIFFERENTIAL) INPUTS
SLAS266C – OCTOBER 2000 – REVISED MAY 2003
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
detailed description (continued)
ideal conversion characteristics
00000000000000
00000000000001
00000000000010
01111111111111
10000000000000
10000000000001
11111111111111
11111111111110
11111111111101
16381
16383
16382
8192
8193
8191
0
1
2
01111111111111
01111111111110
01111111111101
00000000000001
00000000000000
11111111111111
10000000000010
10000000000001
10000000000000
Binary
USB
2s Complement
BTC
1.999878 V 2.000122 V
3.999512 V
Unipolar Analog Input Voltage
Step
Digital Output Code
V
REFM
= V
ZS
= 0 V
122 µV
488 µV
244 µV
VFS – 1 LSB = 3.999756 V
1 LSB = 244 µV
V
MS
= (V
FS
+ V
ZS
)/2 = 2 V
V
REFP
= V
FS
= 4 V
data format
INPUT DATA FORMAT (BINARY) OUTPUT DATA FORMAT READ CONVERSION/FIFO
MSB LSB MSB LSB
ID[15:12] ID[11:0] OD[15:2] OD[1:0]
Command Configuration data field or filled with zeros Conversion result Don’t Care
14-BIT
Unipolar Straight Binary Output: (USB)
Zero-scale code = V
ZS
= 0000h, V
code
= V
REFM
Mid-scale code = V
MS
= 2000h, V
code
= V
REFP
/2
Full-scale code = V
FS
= 3FFFh, V
code
= V
REFT
– 1 LSB
UnIpolar Input, Binary 2’s Complement Output: (BTC)
Zero-scale code = V
ZS
= 2000 h, V
code
= V
REFM
Mid-scale code = V
MS
= 0000h, V
code
= (V
REFP
– V
REFM
)/2
Full-scale code = V
FS
= 1FFFh, V
code
= V
REFP
– 1 LSB