- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361411 > TC820CKW (TelCom Semiconductor, Inc.) 3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE PDF資料下載
參數(shù)資料
| 型號： | TC820CKW |
| 廠商： | TelCom Semiconductor, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE |
| 中文描述： | 3-3/4數(shù)字A / D轉(zhuǎn)換頻率計數(shù)器和邏輯探針轉(zhuǎn)爐 |
| 文件頁數(shù)： | 11/22頁 |
| 文件大?。?/td> | 275K |
| 代理商： | TC820CKW |
3-159
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
If the logic probe is active while FREQ/VOLTS is high
(counter mode), the frequency counter will continue to
operate. The display will read "OL" but the decimal points will
be visible. If the logic probe input is also connected to the
RANGE/FREQ input, bringing the LOGIC input low will
immediately display the frequency at the logic probe input.
Analog Pin Functional Description
Differential Signal Inputs (V
+
The TC820 is designed with true differential inputs, and
accepts input signals within the input stage common-mode
voltage (V
CM
) range. The typical range is V
DD
–1V to V
SS
+1.5V. Common-mode voltages are removed from the sys-
tem when the TC820 operates from a battery or floating
power source (isolated from measured system) and V
SS
is
connected to analog common. (See Figure 8.)
IN
), (V
–
)
TC820
3-3/4 A/D CONVERTER WITH
FREQUENCY COUNTER
AND LOGIC PROBE
Thus, the counter will operate with a 1-second time base
when a 40 kHz oscillator is used. The frequency counter
accuracy is determined by the oscillator accuracy. For
accurate frequency measurements, a crystal oscillator is
recommended.
The frequency counter will automatically select the
proper range. Auto-range operation extends over four
decades, from 3.999 kHz to 3.999 MHz. Decimal points are
set automatically in the frequency mode (Figure 5).
The logic switching levels of the RANGE/FREQ input
are CMOS levels. For best counter operation, an external
buffer is recommended. See the applications section for
details.
Logic Probe
The TC820 can also function as a simple logic probe
(Figure 6). This mode is selected when the LOGIC input is
high. Two dual-purpose pins, which normally control the
decimal points, are used as logic inputs. Connecting either
input to a logic high level will turn on the corresponding LCD
annunciator. When the "low" annunciator is on the buzzer
will be on. As with the frequency counter input, external level
shifters/buffers are recommended for the logic probe inputs.
When the logic probe function is selected while FREQ/
VOLTS is low (A/D mode), the ADC will remain in the auto-
zero mode. The LCD will read "OL" and all decimal points will
be off (Figure 7).
DATA LATCH, PEAK
HOLD REGISTER,
LCD DECODER/DRIVERS
OVERRANGE
DETECT
UNDERRANGE
DETECT
AUTO-RANGE
CONTROL
PROGRAMMABLE
DIVIDER
(
÷
1, 10, 100, 1000)
CLOCK
OSCILLATOR
TO DECIMAL
POINT DRIVERS
FREQUENCY
INPUT
RANGE/
FREQ
÷
20,000
FROM INTEGRATOR
OF A/D CONVERTER
COMPARATOR
LCD
3-3/4 DIGIT COUNTER
COUNT
ENABLE
OVERFLOW
A/D CONVERTER
FREQUENCY COUNTER
A/D CONVERTER/FREQUENCY
COUNTER SELECT
TC820
÷
2
FREQ/
VOLTS
Figure 4. TC820 Counter Operation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TC820CKW | 3-3/4 Digit A/D Converter with Frequency Counter and Logic Probe |
| TC820CLW | 3-3/4 Digit A/D Converter with Frequency Counter and Logic Probe |
| TC820CPL | 3-3/4 Digit A/D Converter with Frequency Counter and Logic Probe |
| TC820CLW | 3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE |
| TC820CPL | 3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC820CKW713 | 功能描述:LCD 驅(qū)動器 3-3/4 A/D Converter 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 |
| TC820CLW | 功能描述:LCD 驅(qū)動器 3-3/4 A/D Converter 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 |
| TC820CLW713 | 功能描述:LCD 驅(qū)動器 3-3/4 A/D Converter 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 |
| TC820CPL | 功能描述:LCD 驅(qū)動器 3-3/4 A/D Converter 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 |
| TC8-20S2405R | 制造商:TRUMPOWER 制造商全稱:Tumbler Technologies + TRUMPower 功能描述:DC/DC CONVERTERS 2:1 Input, 12.5 to 20 Watt |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。