TLC3544CPWR datasheet(16/42 Pages) TI

16 / 42 page

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

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

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

VREFM = VZS = 0 V

122

µV

488

µV

244

µV

VFS – 1 LSB = 3.999756 V

1 LSB = 244

µV

VMS = (VFS + VZS)/2 = 2 V

VREFP = VFS = 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 = VZS = 0000h, Vcode = VREFM

Mid-scale code = VMS = 2000h, Vcode = VREFP/2

Full-scale code = VFS = 3FFFh, Vcode = VREFT – 1 LSB

UnIpolar Input, Binary 2’s Complement Output: (BTC)

Zero-scale code = VZS = 2000 h, Vcode = VREFM

Mid-scale code = VMS = 0000h, Vcode = (VREFP – VREFM)/2

Full-scale code = VFS = 1FFFh, Vcode = VREFP – 1 LSB

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