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參數(shù)資料
| 型號： | TC7136ARCPL |
| 元件分類： | ADC |
| 英文描述： | 1-CH DUAL-SLOPE ADC, PDIP40 |
| 封裝： | PLASTIC, DIP-40 |
| 文件頁數(shù)： | 3/15頁 |
| 文件大小： | 134K |
| 代理商： | TC7136ARCPL |
11
Low Power 3-1/2 Digit Analog-To-
Digital Converters
TC7136
TC7136A
TC7136-6
10/18/96
2001 Microchip Technology Inc.
DS21461A
V
–
ANALOG
COMMON
TC7136
TC7136A
VREF
+
32
35
36
26
240 k
10 k
VREF
–
VREF
1
+
9V
SET VREF = 1/2 VFULL SCALE
V
+
analog common is a very stable potential with excellent
temperature stability (typically 35 ppm/
°c). for TC7136A
This potential can be used to generate the TC7136A's
reference voltage. An external voltage reference will be
unnecessary in most cases because of the 35 ppm/
°C
temperature coefficient. See TC7136A Internal Voltage
Reference discussion.
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 through a 500
resistor. The TEST pin
load should not be more than 1mA. See the Applications
Section for additional information on using TEST as a
negative digital logic supply.
If TEST is pulled high (to V+), all segments plus the
minus sign will be activated. DO NOT OPERATE IN THIS
MODE FOR MORE THAN SEVERAL MINUTES. With TEST
= V+, the LCD segments are impressed with a DC voltage
which will destroy the LCD.
TC7136A Internal Voltage Reference
The TC7136 analog common voltage temperature sta-
bility has been significantly improved (Figure 9). The "A"
version of the industry-standard TC7136 device allows
users to upgrade old systems and design new systems
without external voltage references. External R and C val-
ues do not need to be changed; however, noise perfor-
mance will be improved by increasing CAZ. (See Auto-Zero
Capacitor section.) Figure 10 shows analog common sup-
plying the necessary voltage reference for the TC7136/A.
Figure 9. Analog Common Temperature Coefficient
Decimal Point and Annunciator Drive
The TEST pin is connected to the internally-generated
digital logic supply ground through a 500
resistor. The
TEST pin may be used as the negative supply for external
CMOS gate segment drivers. LCD annunciators for decimal
points, low battery indication, or function indication may be
added without adding an additional supply. No more than 1
mA should be supplied by the TEST pin: its potential is
approximately 5V below V+.
TYPICAL
GUARANTEED
MAXIMUM
TYPICAL
GUARANTEED
MAXIMUM
TYPICAL
NO MAXIMUM
SPECIFIED
200
180
160
140
120
100
80
60
40
20
0
ANALOG
COMMON
TEMPERATURE
COEFFICIENT
(ppm/
°C)
TC7136
TC7136A
ICL7136
Figure 10. TC7136A Internal Voltage Reference Connection
APPLICATIONS INFORMATION
Liquid Crystal Display Sources
Several manufacturers supply standard LCDs to inter-
face with the TC7136A 3-1/2 digit analog-to-digital con-
verter.
Representative
Manufacturer
Address/Phone
Part Numbers*
Crystaloid
5282 Hudson Dr.
C5335, H5535,
Electronics
Hudson, OH 44236
T5135, SX440
216-655-2429
AND
720 Palomar Ave.
FE 0201, 0501
Sunnyvale, CA 94086
FE 0203, 0701
408-523-8200
FE 2201
VGI, Inc.
1800 Vernon St. Ste. 2
I1048, I1126
Roseville, CA 95678
916-783-7878
Hamlin, Inc.
612 E. Lake St.
3902, 3933, 3903
Lake Mills, WI 53551
414-648-2361
*NOTE: Contact LCD manufacturer for full product listing/specifications.
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| TC7136CKW | 功能描述:LCD 驅(qū)動器 Low Power RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)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 |
| TC7136CKW713 | 功能描述:LCD 驅(qū)動器 Low Power RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)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 |
| TC7136CLW | 功能描述:LCD 驅(qū)動器 Low Power RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)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 |
| TC7136CLW713 | 功能描述:LCD 驅(qū)動器 Low Power RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)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 |
| TC7136CPI | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Low Power 3-1/2 Digit Analog-to-Digital Converter |
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