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參數(shù)資料
| 型號： | TC14433AELITR |
| 元件分類： | ADC |
| 英文描述： | 1-CH 3-BIT DUAL-SLOPE ADC, SERIAL ACCESS, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 2/24頁 |
| 文件大?。?/td> | 382K |
| 代理商： | TC14433AELITR |
TC14433/A
DS21394D-page 10
2008 Microchip Technology Inc.
5.0
TYPICAL APPLICATIONS
The typical application circuit 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
The circuit in Figure 5-1 shows a 3-1/2 digit LCD
voltmeter. 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 VSS is connected to VEE. In this
case, VAG must be at least 2.8V above VEE.
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 (Q3 = 0 and Q0 = 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).
TABLE 5-1:
TRUTH TABLE
Figure 5-2 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 segment drive and the 75492 or 1413
provides sink for digit current. Display is blanked during
the overrange condition.
Note:
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 (see Table 5-1).
Coded
Condition
of MSD
Q
3
Q
2
Q
1
Q
0
BDC to 7-Segment
Decoding
+01
1
0
Blank
-01
0
1
0
+0 UR
11
1
-0 UR
10
1
+10
1
0
4 – 1
0 – 1
7 – 1
3 – 1
Hook up
only segments
b and c to MSD
-10
0
+1 OR
01
1
-1 OR
00
1
Note 1:
Q3 – 1/2 digit, low for “1”, high for “0”.
Q2 – Polarity: “1” = positive, “0” = negative.
Q0 – Out of range condition exists if Q0 = 1.
When used in conjunction with Q3, the type
of out of range condition is indicated; i.e.,
Q3 = 0 → OR or Q3 = 1 → UR.
相關(guān)PDF資料 |
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| TC14433AEPG | DUAL-SLOPE ADC, PARALLEL ACCESS, PDIP24 |
| TC14433BEJG | CONVERTER SUBSYSTEM ADC, PARALLEL ACCESS, CDIP24 |
| TC14433BEPG | CONVERTER SUBSYSTEM ADC, PARALLEL ACCESS, PDIP24 |
| TC14433EPG | DUAL-SLOPE ADC, PARALLEL ACCESS, PDIP24 |
| TC14433AELI | DUAL-SLOPE ADC, PARALLEL ACCESS, PQCC28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| TC14433AT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:3-1/2 Digit, Analog-to-Digital Converter |
| 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 |
| TC14433AT-E/OG | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:3-1/2 Digit, Analog-to-Digital Converter |
| TC14433AT-E/PG | 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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