参数资料
型号: TC7135CPI
厂商: Microchip Technology
文件页数: 1/28页
文件大小: 0K
描述: IC ADC 4 1/2DGT 28-DIP
标准包装: 15
显示器类型: LED
配置: 7 段显示
接口: BCD
数字或字符: A/D,4.5 位数字
电流 - 电源: 1mA
电源电压: 4 V ~ 6 V
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: 28-DIP(0.600",15.24mm)
供应商设备封装: 28-PDIP
包装: 管件
其它名称: 158-1133
158-1133-ND
TC7135CPIR
TC7135CPIR-ND
TC7135
4-1/2 Digit A/D Converter
Features
General Description
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Low Rollover Error: ±1 Count Max
Nonlinearity Error: ±1 Count Max
Reading for 0V Input
True Polarity Indication at Zero for Null Detection
Multiplexed BCD Data Output
TTL-Compatible Outputs
Differential Input
Control Signals Permit Interface to UARTs and
Microprocessors
Blinking Display Visually Indicates Overrange
Condition
Low Input Current: 1 pA
Low Zero Reading Drift: 2 μV/°C
Auto-Ranging Supported with Overrange and
Underrange Signals
Available in PDIP and Surface-Mount Packages
The TC7135 4-1/2 digit A/D Converter (ADC) offers
50 ppm (1 part in 20,000) resolution with a maximum
nonlinearity error of 1 count. An auto-zero cycle
reduces zero error to below 10 μV and zero drift to
0.5 μV/°C. Source impedance errors are minimized by
a 10 pA maximum input current. Rollover error is
limited to ±1 count.
Microprocessor-based measurement systems are
supported by the BUSY, STROBE and RUN/HOLD
control signals. Remote data acquisition systems with
data transfer via UARTs are also possible. The
additional control pins and multiplexed BCD outputs
make the TC7135 the ideal converter for display or
microprocessor-based measurement systems.
Applications
? Precision Analog Signal Processor
? Precision Sensor Interface
? High Accuracy DC Measurements
Functional Block Diagram
Set V REF = 1V
5V
TC7135
V REF IN
2
100 k Ω
OVERRANGE
INT OUT
0.47 μF
5
AZ IN
100 k Ω 7
C REF –
C REF +
10
+INPUT
D3
+5V
D5 (MSD)
D4
Signal
Input
Analog GND 4
100 k Ω 1 μF 8
0.1 μF
1 μF
1
V–
UNDERRANGE
REF IN
3 ANALOG
COMMON STROBE
RUN/HOLD
DIGTAL GND
6
BUFF OUT POLARITY
CLOCK IN
BUSY
9
–INPUT (LSD) D1
D2
11
V+
12
28
27
26
25
24
23
22
21
20
19
18
17
Clock Input
120 kHz
? 2007 Microchip Technology Inc.
13
14
B1 (LSB)
B2
(MSB) B8
B4
16
15
DS21460D-page 1
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