TLC3544 Datasheet, PDF (16/40 Pages) Texas Instruments – 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

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
detailed description (continued)
ideal conversion characteristics
2s Complement
BTC
01111111111111
Binary
USB
11111111111111
01111111111110 11111111111110
01111111111101 11111111111101
16383
16382
16381
00000000000001
00000000000000
11111111111111
10000000000001
10000000000000
01111111111111
8193
8192
8191
10000000000010 00000000000010
2
10000000000001 00000000000001
1
10000000000000 00000000000000
0
VREFM = VZS = 0 V
122 µV
244 µV
488 µV
1.999878 V 2.000122 V
VMS = (VFS + VZS)/2 = 2 V
VREFP = VFS = 4 V
VFS – 1 LSB = 3.999756 V
3.999512 V
Unipolar Analog Input Voltage
1 LSB = 244 µV
data format
INPUT DATA FORMAT (BINARY)
MSB
LSB
ID[15:12]
ID[11:0]
Command
Configuration data field or filled with zeros
OUTPUT DATA FORMAT READ CONVERSION/FIFO
MSB
LSB
OD[15:2]
OD[1:0]
Conversion result
Don’t Care
14-BIT
Unipolar Straight Binary Output: (USB)
Zero-scale code = VZS = 0000h, Vcode = VREFM
Mid-scale code = V_MS = 2000h, Vcode = VREFP/2
Full-scale code = V_FS = 3FFFh, Vcode = VREFT – 1 LSB
UnIpolar Input, Binary 2’s Complement Output: (BTC)
Zero-scale code = V_ZS = 2000 h, Vcode = VREFM
Mid-scale code = V_MS = 0000h, Vcode = (VREFP – VREFM)/2
Full-scale code = V_FS = 1FFFh, Vcode = VREFP – 1 LSB
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