参数资料
型号: TC7129CLW
元件分类: ADC
英文描述: 1-CH DUAL-SLOPE ADC, ACCESS, PQCC44
封装: PLASTIC, LCC-44
文件页数: 7/17页
文件大小: 185K
代理商: TC7129CLW
15
TC7129
4-1/2 DIGIT ANALOG-TO-DIGITAL
CONVERTER WITH ON-CHIP LCD DRIVERS
Figure 17.
Display Segment Assignments
The ANNUNCIATOR DRIVE output (pin 3) is a square-
wave running at the backplane frequency (100 Hz or 83.3Hz),
with a peak-to-peak voltage equal to DGND voltage. Con-
necting an annunciator to pin 3 turns it ON; connecting it to
its backplane turns it OFF.
Figure 18.
Backplane Waveforms
BP1
BP2
BP3
LOW BATTERY
CONTINUITY
F4, E4, DP4
A4, G4, D4
B4, C4, BC4
F3, E3, DP3
A3, G3, D3
B3, C3, MINUS
B1, C1, CONTINUITY
A1, G1, D1
F1, E1, DP1
B2, C2, LOW BATTERY
A2, G2, D2
BACKPLANE
CONNECTIONS
F2, E2, DP2
CONTINUITY
BP1
BP2
BP3
Figure 19.
Typical Display Output Waveforms
VDD
VH
VL
VDISP
VDD
VH
VL
VDISP
VDD
VH
VL
VDISP
VDD
VH
VL
VDISP
b SEGMENT
LINE
ALL OFF
a SEGMENT
ON
d, g OFF
a, g ON
d OFF
ALL ON
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