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| 型号： | TC7107CKW713G |
| 元件分类： | ADC |
| 英文描述： | 1-CH DUAL-SLOPE ADC, PARALLEL ACCESS, PQFP44 |
| 封装： | 10 X 10 MM, 2 MM HEIGHT, PLASTIC, MQFP-44 |
| 文件页数： | 9/34页 |
| 文件大小： | 482K |
| 代理商： | TC7107CKW713G |
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2008 Microchip Technology Inc.
DS21455D-page 17
TC7106/A/TC7107/A
FIGURE 8-2:
Common Mode Voltage Removed in Battery Operation with VIN- = Analog Common.
The analog common pin serves to set the analog section
reference or common point. The TC7106A is specifically
designed to operate from a battery, or in any
measurement system where input signals are not
referenced (float), with respect to the TC7106A power
source. The analog common potential of V+ – 3.0V gives
a 6V end of battery life voltage. The common potential
has a 0.001% voltage coefficient and a 15
Ω output
impedance.
With sufficiently high total supply voltage (V+ – V- >
7.0V), analog common is a very stable potential with
excellent temperature stability, typically 20 ppm/°C.
This potential can be used to generate the reference
voltage.
An
external
voltage
reference
will
be
unnecessary in most cases because of the 50 ppm/°C
maximum temperature coefficient. See Section 8.5
8.4
TEST (Pin 37)
The TEST pin potential is 5V less than V+. TEST may
be used as the negative power supply connection for
external CMOS logic. The TEST pin is tied to the
internally generated negative logic supply (Internal
Logic Ground) through a 500
Ω resistor in the
TC7106A. The TEST pin load should be no more than
1mA.
If TEST is pulled to V+ all segments plus the minus sign
will be activated. Do not operate in this mode for more
than
several
minutes
with
the
TC7106A.
With
TEST = V+, the LCD segments are impressed with a
DC voltage which will destroy the LCD.
The TEST pin will sink about 10 mA when pulled to V+.
8.5
Internal Voltage Reference
The analog common voltage temperature stability has
been significantly improved (Figure 8-3). The “A”
version of the industry standard circuits allow users to
upgrade old systems and design new systems without
external voltage references. External R and C values
do not need to be changed. Figure 8-4 shows analog
common supplying the necessary voltage reference for
the TC7106A/TC7107A.
FIGURE 8-3:
Analog Common
Temperature Coefficient.
FIGURE 8-4:
Internal Voltage Reference
Connection.
V
BUF
C
AZ
V
INT
BP
POL
Segment
Drive
OSC1
OSC3
OSC2
V-
V+
V
REF+
V
REF -
Analog
Common
V-
V+
V-
V+
GND
Measured
System
Power
Source
9V
LCD Display
TC7106A
+
V
IN -
V
IN +
Typical
No Maximum Specified
No
Maximum
Specified
No
Maximum
Specified
Typical
200
180
160
140
120
100
80
60
40
20
0
T
e
mp
er
at
u
re
C
o
e
ffi
c
ie
n
t
(p
p
m
/°
C)
ICL7136
TC
7106A
ICL7106
Maximum
Limit
V-
Analog
Common
TC7106A
TC7107A
V
REF +
32
35
36
24k
Ω
1k
Ω
V
REF
-
V
REF
1
Set V
REF
= 1/2 V
FULL SCALE
V+
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7107CLW | 功能描述:LED显示驱动器 w/LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| TC7107CLW713 | 功能描述:LED显示驱动器 w/LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| TC7107CPL | 功能描述:LED显示驱动器 w/LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| TC7107CPL | 制造商:Microchip Technology Inc 功能描述:Leaded Process Compatible:No |
| TC7107CPL | 制造商:Microchip Technology Inc 功能描述:3.5 DIGIT ADC CMOS 7107 DIP40 制造商:Microchip Technology Inc 功能描述:3.5 DIGIT ADC, CMOS, 7107, DIP40 制造商:Microchip Technology Inc 功能描述:3.5 DIGIT ADC, CMOS, 7107, DIP40; Resolution (Bits):3.5bit; Supply Voltage Type:Single; Supply Voltage Max:5V; Supply Current:800A; Digital IC Case Style:DIP; No. of Pins:40; Input Channel Type:Differential; Data Interface:Parallel;;RoHS Compliant: Yes |
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