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參數資料
| 型號： | TC7106AIPL |
| 廠商： | TelCom Semiconductor, Inc. |
| 元件分類： | 串行ADC |
| 英文描述： | 3-1/2 DIGIT A/D CONVERTERS |
| 中文描述： | 3-1/2位數的A / D轉換器 |
| 文件頁數： | 12/19頁 |
| 文件大?。?/td> | 296K |
| 代理商： | TC7106AIPL |
3-194
TELCOM SEMICONDUCTOR, INC.
TC7106
TC7106A
TC7107
TC7107A
3-1/2 DIGIT A/D CONVERTERS
DEVICE PIN FUNCTIONAL DESCRIPTION
Differential Signal Inputs
(V
+IN
(Pin 31), V
–IN
(Pin 30))
The TC7106A/7017A is designed with true differential
inputs and accepts input signals within the input stage
common mode voltage range (V
CM
). The typical range is V
+
–1.0 to V
–
+1 V. Common-mode voltages are removed from
the system when the TC7106A/TC7107A operates from a
battery or floating power source (isolated from measured
system) and V
–
See Figure 8.
In systems where common-mode voltages exist, the
86dB common-mode rejection ratio minimizes error. Com-
mon-mode voltages do, however, affect the integrator out-
put level. Integrator output saturation must be prevented. A
worst-case condition exists if a large positive V
CM
exists in
conjunction with a full-scale negative differential signal. The
negative signal drives the integrator output positive along
with V
CM
(Figure 9). For such applications the integrator
output swing can be reduced below the recommended 2.0V
IN
is connected to analog common (V
COM
):
Figure 8. Common-Mode Voltage Removed in Battery Operation with V
–
IN
= Analog Common
TC7106A
TC7107A
6.8V
ZENER
IZ
V+
V+
TC04
V+
1.2V
REF
COMMON
TC7106A
TC7107A
6.8k
20k
V+
V–
V+
V–
(a)
(b)
V+
R
I
+
–
V
IN
V
C
I
INTEGRATOR
V
I
=
[
[
V
CM
V
IN
–
INPUT
BUFFER
C
I
=
R
I
=
INTEGRATION CAPACITOR
INTEGRATION RESISTOR
4000
f
OSC
INTEGRATION TIME
T
I
=
=
Where:
V
I
CM
–
+
–
+
TI
RI CI
full-scale swing. The integrator output will swing within 0.3V
of V
+
or V
–
without increasing linearity errors.
Differential Reference
(V
+
REF
(Pin 36), V
–
The reference voltage can be generated anywhere
within the V
+
to V
–
power supply range.
To prevent rollover errors from being induced by large
common-mode voltages, C
REF
should be large compared to
stray node capacitance.
The TC7106A/TC7107A circuits have a significantly
lower analog common temperature coefficient. This gives a
very stable voltage suitable for use as a reference. The
temperature coefficient of analog common is 20ppm/
°
C
typically.
REF
(Pin 35))
VBUF
V+IN
VINT
BP
POL
SEGMENT
DRIVE
OSC1
OSC3
OSC2
V+
V+
VR–
ANALOG
COMMON
V–
V+
V–
V+
GND
GND
MEASURED
SYSTEM
POWER
SOURCE
9V
LCD DISPLAY
TC7106A
+
V–IN
Figure 9.
Common-Mode Voltage Reduces Available Integrator
Swing. (V
COM
≠
V
IN
)
Figure 7. External Reference
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相關代理商/技術參數 |
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| TC7106ARCPL | 功能描述:LCD 驅動器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TC7106CKW | 功能描述:LCD 驅動器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TC7106CKW713 | 功能描述:LCD 驅動器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TC7106CLW | 功能描述:LCD 驅動器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| TC7106CLW713 | 功能描述:LCD 驅動器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
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