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參數(shù)資料
| 型號： | ICL7137 |
| 廠商： | Intersil Corporation |
| 元件分類： | 串行ADC |
| 英文描述： | 3 1/2 Digit LED, Low Power Display,A/D Converters(3 1/2 位用于低功耗LED的A/D轉(zhuǎn)換器) |
| 中文描述： | 低功耗、3 1/2位A/D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 5/15頁 |
| 文件大?。?/td> | 497K |
| 代理商： | ICL7137 |
5
FN3086.6
July 21, 2005
Typical Integrator Amplifier Output Waveform (INT Pin)
Design Information Summary Sheet
OSCILLATOR FREQUENCY
f
OSC
= 0.45/RC
C
OSC
> 50pF; R
OSC
> 50k
f
OSC
(Typ) = 48kHz
OSCILLATOR PERIOD
t
OSC
= RC/0.45
INTEGRATION CLOCK FREQUENCY
f
CLOCK
= f
OSC
/4
INTEGRATION PERIOD
t
INT
= 1000 x (4/f
OSC
)
60/50Hz REJECTION CRITERION
t
INT
/t
60Hz
or t
lNT
/t
50Hz
= Integer
OPTIMUM INTEGRATION CURRENT
I
INT
= 1
μ
A
FULL SCALE ANALOG INPUT VOLTAGE
V
lNFS
(Typ) = 200mV or 2V
INTEGRATE RESISTOR
INTEGRATE CAPACITOR
INTEGRATOR OUTPUT VOLTAGE SWING
V
INT
MAXIMUM SWING:
(V- + 0.5V) < V
INT
< (V+ - 0.5V), V
INT
(Typ) = 2V
DISPLAY COUNT
CONVERSION CYCLE
t
CYC
= t
CL0CK
x 4000
t
CYC
= t
OSC
x 16,000
when f
OSC
= 48kHz; t
CYC
= 333ms
COMMON MODE INPUT VOLTAGE
(V- + 1V) < V
lN
< (V+ - 0.5V)
AUTO-ZERO CAPACITOR
0.01
μ
F < C
AZ
< 1
μ
F
REFERENCE CAPACITOR
0.1
μ
F < C
REF
< 1
μ
F
V
COM
Biased between V+ and V-.
V
COM
V+ - 2.8V
Regulation lost when V+ to V- <
6.8V.
If V
COM
is externally pulled down to (V + to V -)/2,
the V
COM
circuit will turn off.
POWER SUPPLY: SINGLE 9V
V+ - V- = 9V
Digital supply is generated internally
V
TEST
V+ - 4.5V
DISPLAY: LCD
Type: Direct drive with digital logic supply amplitude.
R
INT
V
INT
----------------
=
C
INT
t
-------------------------------
(
)
I
INT
(
)
=
V
INT
t
-------------------------------
(
)
I
C
INT
)
=
COUNT
1000
V
REF
--------------
×
=
AUTO ZERO PHASE
(COUNTS)
2999 - 1000
SIGNAL INTEGRATE
PHASE FIXED
1000 COUNTS
DE-INTEGRATE PHASE
0 - 1999 COUNTS
TOTAL CONVERSION TIME = 4000 x t
CLOCK
= 16,000 x t
OSC
ICL7136
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICL7137C/D | 功能描述:顯示驅(qū)動器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| ICL7137CDL | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ICL7137CJL | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ICL7137CM44 | 制造商:Rochester Electronics LLC 功能描述:44 PQFP, 0 + 70, 3 1/2 DIG A/D (LED DRIVE) - Bulk |
| ICL7137CMH | 制造商:Maxim Integrated Products 功能描述:LOW POWER, 3 1/2 DIGIT ADC WITH DIRECT LED DR - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
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