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参数资料
| 型号： | TC7129CKW |
| 元件分类： | ADC |
| 英文描述： | 1-CH DUAL-SLOPE ADC, ACCESS, PQFP44 |
| 封装： | PLASTIC, QFP-44 |
| 文件页数： | 16/17页 |
| 文件大小： | 185K |
| 代理商： | TC7129CKW |
8
TC7129
4-1/2 DIGIT ANALOG-TO-DIGITAL
CONVERTER WITH ON-CHIP LCD DRIVERS
Figure 2.
Powering the TC7129 From a
±5V Power Supply
V–
V
+
REF HI
REF LO
IN HI
COM
IN LO
DGND
VIN
+
–
–5V
0.1 F
+5V
0.1 F
24
34
35
28
33
32
23
36
TC7129
TC04
0.1 F
±5V Power Supply
Measurements are made with respect to power supply
ground. DGND (pin 36) is set internally to about 5V less than
V+ (pin 24); it is not intended as a power supply input and
must not be tied directly to power supply ground. (It can be
used as a reference for external logic, as explained in
"Connecting to External Logic." (See Figure 2.)
V–
TC7129
V
REF HI
REF LO
IN HI
COM
IN LO
DGND
3.8V
TO
6V
+
10 F
+
8
2
4
10 F
TC04
+
–
3
TC7660
VIN
5
24
+
34
35
28
33
32
23
36
Figure 3. Powering the TC7129 From a Low-Voltage Battery
V–
V
DGND
+
10 F
+
8
2
4
10 F
TC04
+
–
3
VIN
5
24
+
34
35
28
33
32
23
36
TC7660
V+
GND
0.1 F
+5V
TC7129
Figure 4. Powering the TC7129 From a +5V Power Supply
Low-Voltage Battery Source
A battery with voltage between 3.8V and 6V can be used
to power the TC7129 when used with a voltage-doubler
circuit as shown in Figure 3. The voltage doubler uses the
TC7660 DC-to-DC voltage converter and two external ca-
pacitors.
+5V Power Supply
Measurements are made with respect to power supply
ground. COMMON (pin 28) is connected to REF LO (pin 35).
A voltage doubler is needed, since the supply voltage is less
than the 6V minimum needed by the TC7129. DGND (pin
36) must be isolated from power supply ground.
(See Figure 4.)
Connecting to External Logic
External logic can be directly referenced to DGND (pin
36), provided that the supply current of the external logic
does not exceed the sink current of DGND (Figure 5). A safe
value for DGND sink current is 1.2 mA. If the sink current is
expected to exceed this value, a buffer is recommended.
(See Figure 6.)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7129CKW713 | 功能描述:LCD 驱动器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| TC7129CLW | 功能描述:LCD 驱动器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| TC7129CLW713 | 功能描述:LCD 驱动器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| TC7129CPL | 功能描述:LCD 驱动器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| TC7129CPL713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
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