参数资料
| 型号： | TC14433ELI |
| 厂商： | Microchip Technology |
| 文件页数： | 6/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 3 1/2 DIGIT 28PLCC |
| 标准包装： | 39 |
| 显示器类型： | LED |
| 配置： | 7 段显示 |
| 接口： | BCD |
| 数字或字符： | A/D，3.5 位数字 |
| 电流 - 电源： | 1.8mA |
| 电源电压： | 4.5 V ~ 8 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-LCC（J 形引线） |
| 供应商设备封装： | 28-PLCC |
| 包装： | 管件 |
TC14433/A
3.0
PIN DESCRIPTIONS
TABLE 3-1:
Pin No.
PIN FUNCTION TABLE
Pin No.
24-Pin PDIP,
SOIC
1
28-Pin
PLCC
2
Symbol
V AG
Description
This is the analog ground. It has a high input impedance. The pin determines
the reference level for the unknown input voltage (V X ) and the reference
voltage (V REF ).
2
3
V REF
Reference voltage – Full scale output is equal to the voltage applied to V REF .
Therefore, full scale voltage of 1.999V requires 2V reference and 199.9 mV
full scale requires a 200 mV reference. V REF functions as system reset also.
When switched to V EE , the system is reset to the beginning of the
conversion cycle.
3
4
V X
The unknown input voltage (V X ) is measured as a ratio of the reference
voltage (V REF ) in a ratiometric A/D conversion.
4
5
R 1
This pin is for external components used for the integration function in the
dual slope conversion. Typical values are 0.1 μF (Mylar) capacitor for C 1 .
5
6
6
7
R 1 /C 1
C 1
R 1 = 470 k Ω (resistor) for 2V full scale.
R 1 = 27 k Ω (resistor) for 200 mV full scale. Clock frequency of 66 kHz gives
250 ms conversion time.
7
9
CO 1
These pins are used for connecting the offset correction capacitor. The
recommended value is 0.1 μF.
8
10
CO 2
These pins are used for connecting the offset correction capacitor. The
recommended value is 0.1 μF.
9
11
DU
Display update input pin. When DU is connected to the EOC output, every
conversion is displayed. New data will be strobed into the output latches
during the conversion cycle if a positive edge is received on DU, prior to the
ramp down cycle. When this pin is driven from an external source, the
voltage should be referenced to V SS .
10
12
CLK 1
Clock input pins. The TC14433 has its own oscillator system clock.
Connecting a single resistor between CLK 1 and CLK 0 sets the clock
frequency.
11
13
CLK 0
A crystal or OC circuit may be inserted in lieu of a resistor for improved
CLK 1 , the clock input, can be driven from an external clock source, which
need only have standard CMOS output drive. This pin is referenced to V EE
for external clock inputs. A 300 k Ω resistor yields a clock frequency of about
66 kHz. See Section 2.0 “Typical Performance Curves” . (Also see
12
14
V EE
Negative power current. Connection pin for the most negative supply. Please
note the current for the output drive circuit is returned through V SS . Typical
supply current is 0.8 mA.
13
16
V SS
Negative power supply for output circuitry. This pin sets the low voltage level
for the output pins (BCD, Digit Selects, EOC, OR). When connected to
analog ground, the output voltage is from analog ground to V DD . If
connected to V EE , the output swing is from V EE to V DD . The recommended
operating range for V SS is between the V DD -3 volts and V EE .
14
17
EOC
End of conversion output generates a pulse at the end of each conversion
cycle. This generated pulse width is equal to one half the period of the
system clock.
15
18
OR
Overrange pin. Normally this pin is set high. When V X exceeds V REF the OR
is low.
DS21394D-page 6
? 2008 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
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| TC14433ELI713 | 功能描述:模数转换器 - ADC 3-1/2 Digit A/D BCD RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TC14433EPG | 功能描述:模数转换器 - ADC 3-1/2 Digit A/D BCD RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TC14433EPG | 制造商:Microchip Technology Inc 功能描述:IC ADC 3.5 DIGIT LED/LCD DISPLAY 制造商:Microchip Technology Inc 功能描述:IC, ADC, 3.5 DIGIT LED/LCD DISPLAY |
| TC14433EPG | 制造商:Microchip Technology Inc 功能描述:A/D Converter (A-D) IC |
| TC14433T | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:3-1/2 Digit, Analog-to-Digital Converter |
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