參數(shù)資料
型號(hào)： TC14433AELI
廠商： Microchip Technology Inc.
元件分類： 顯示驅(qū)動(dòng)器
英文描述： LJT 13C 13#22D SKT WALL RECP
中文描述： 3-1/2數(shù)字，模擬到數(shù)字轉(zhuǎn)換器
文件頁(yè)數(shù)： 8/10頁(yè)
文件大?。?/td> 149K
代理商： TC14433AELI
3-134
TELCOM SEMICONDUCTOR, INC.
3-1/2 DIGIT A/D CONVERTERS
TC14433
TC14433A
APPLICATIONS INFORMATION
Figure 10 is an example of a 3-1/2 digit voltmeter using
the TC14433 with common-anode displays. This system
requires a 2.5V reference. Full-scale may be adjusted to
1.999V or 199.9 mV. Input overrange is indicated by flashing
a display. This display uses LEDs with common anode digit
lines. Power supply for this system is shown as a dual
±
5V
supply; however, the TC14433 will operate over a wide
voltage range (see recommended operating conditions,
page 2).
The circuit in Figure 11 shows a 3-1/2 digit LCD voltme-
ter. The 14024B provides the low frequency square wave
signal drive to the LCD backplane. Dual power supplies are
shown here; however, one supply may be used when V
SS
is
connected to V
EE
. In this case, V
AG
must be at least 2.8V
above V
EE
.
When only segments b and c of the decoder are con-
nected to the 1/2 digit of the display, 4, 0, 7 and 3 appear as 1.
The overrange indication (Q
3
= 0 and Q
0
= 1) occurs
when the count is greater than 1999; e.g., 1.999V for a
reference of 2V. The underrange indication, useful for auto-
ranging circuits, occurs when the count is less than 180; e.g.,
0.180V for a reference of 2V.
CAUTION
If the most significant digit is connected to a
display other than a "1" only, such as a full
digit display, segments other than b and c must
be disconnected. The BCD to 7-segment
decoder must blank on BCD inputs 1010 to 1111.
Figure 14 is an example of a 3-1/2 digit LED voltmeter
with a minimum of external components (only 11 additional
components). In this circuit, the 14511B provides the seg-
ment drive and the 75492 or 1413 provides sink for digit
current. Display is blanked during the overrange condition.
Figure 13. Demultiplexing for TC14433 BCD Data
D
POL 14042B C
R 14175B C
POL 14175B C
C 14042B POL
POL 14042B C
C 14042B POL
POL 14175B C
POL 14175B C
Q
DS
MULTIPLEXED
BCD
EOC
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
1
DS
2
DS
1
DS
2
DS
3
DS
4
0
D
1
D
2
D
3
D
0
D
1
D
2
D
3
D
0
D
1
D
2
D
3
D
0
D
1
D
2
D
3
0
Q
1
Q
2
Q
3
Q
0
Q
1
Q
2
Q
3
Q
0
Q
1
Q
2
Q
3
Q
0
Q
1
Q
2
Q
3
D
Q
0
D
1
D
2
D
3
0
Q
1
Q
2
Q
3
D
0
D
1
D
2
D
3
Q
0
Q
1
Q
2
Q
3
D
0
D
1
D
2
D
3
Q
0
Q
1
Q
2
Q
3
D
0
D
1
D
2
D
3
Q
0
Q
1
Q
2
Q
3
TRUTH TABLE
Coded Condition
BCD to 7-Segment
of MSD
Q
3
Q
2
Q
1
Q
0
Decoding
+0
–0
1
1
1
1
0
0
0
0
1
0
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Blank
Blank
Blank
Blank
Hook up
only
segments
b and c
to MSD
+0 UR
–0 UR
+1
–1
+1 OR
–0 OR
4–1
0–1
7–1
3–1
NOTES: Q
3
— 1/2 digit, low for "1", high for "0"
Q
2
— Polarity: "1" = positive, "0" = negative
Q
0
— Out of range condition exists if Q
0
= 1. When used in
conjunction with Q
3
, the type of out of range condition is
indicated; i.e., Q
3
= 0
→
OR or Q
3
= 1
→
UR.
相關(guān)PDF資料
PDF描述
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TC14433AEPG 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3-1/2 Digit A/D BCD RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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TC14433AT-E/LI 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:3-1/2 Digit, Analog-to-Digital Converter
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