TC815CBU View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC815CBU

3-1/2 Digit Auto-Ranging A/D Converter with Triplex LCD Drive and Display Hold Function

Microchip Technology 

TC815

FIGURE 9-2:

TRIPLEX LCD DRIVE WAVEFORMS

a

b

f

g

e

c

d

BP1

BP2

BP3

FE

AGD

BCP

Backplanes

123456

VP (3V)

BP1

VP

VH

VL

BP20

VP

VH

VL

BP30

Waveforms to Generate

Backplanes

123456

Segments

VP

VH

a (FE – BP1) 0

"On"

–VL

–VH

–VP

VP

VH

VL

b (BCP – BP1) 0

"On"

–VL

–VH

–VP

VP

VH

VL

c (BCP – BP2) 0

"On"

–VL

–VH

–VP

VP

VH

VL

d (AGD – BP3) 0

"On"

–VL

–VH

–VP

VP

VH

VL

e (FE – BP2) 0

"Off"

–VL

–VH

–VP

VP

VH

VL

f (FE – BP1)

"Off"

–VL

–VH

–VP

VP

VH

g (AGD – BP2)

VL

0

"On"

–VL

–VH

–VP

Applied

RMS Voltage

VRMS =

11 VP

33

VRMS =

11 VP

33

VRMS =

11 VP

33

VRMS =

11 VP

33

VP

VRMS = 3

VP

VRMS = 3

VRMS =

11 VP

33

FIGURE 9-3:

TYPICAL LCD DISPLAY CONFIGURATION TC815 TRIPLEX

50.8 (+0.3–0.1)

2.9

45.0 Viewing Area Min.

1.27

1.27

CL Between Pads 2.54 X 17 - 43.18

3.81

19

36

- MEM

–+

3

10

HOLD

6

5.5

3

LOΩ

AC

0.5

Max.

AUTO

18

a

1.4

f

b

kΩ 3

10

g

4

3

1

2

e

c

mVA

d

2.4

P4

P3

P2

1

Dimensions in mm (Not to Scale)

0.2

0.2

1.1

1.1

DS21474B-page 18

© 2002 Microchip Technology Inc.

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