- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383541 > MAX922 (Maxim Integrated Products, Inc.) Ultra Low-Power, Single/Dual-Supply Comparators PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX922 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Ultra Low-Power, Single/Dual-Supply Comparators |
| 中文描述： | 超低功耗、單/雙電源比較器 |
| 文件頁(yè)數(shù)： | 12/16頁(yè) |
| 文件大小： | 139K |
| 代理商： | MAX922 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)當(dāng)前第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
M
Ultra Low-Power,
S ingle/Dual-S upply Comparators
12
______________________________________________________________________________________
2. Select R1. The leakage current into INB- is normally
under 1nA, so the current through R1 should
exceed 100nA for the thresholds to be accurate. R1
values up to about 10M
can be used, but values in
the 100k
to 1M
range are usually easier to deal
with. In this example, choose R1 = 294k
.
3. Calculate R2 + R3. The overvoltage threshold
should be 5.5V when V
IN
is rising. The design
equation is as follows:
V
V
REF
=
4. Calculate R2. The undervoltage threshold should
be 4.5V when V
IN
is falling. The design equation is
as follows:
(V
=
×
5. Calculate R3.
R3
=
=
=
Choose R3 = 1M
(1% standard value)
6. Verify the resistor values. The equations are as
follows, evaluated for the above example.
Overvoltage threshold :
(R1
OTH
REF
=
+
×
Bar-Graph Level Gauge
The high output source capability of the MAX921 series
is useful for driving LEDs. An example of this is the
simple four-stage level detector shown in Figure 7.
The full-scale threshold (all LEDs on) is given by V
IN
=
(R1 + R2)/R1 volts. The other thresholds are at 3/4 full
scale, 1/2 full scale, and 1/4 full scale. The output
resistors limit the current into the LEDs.
Level S hifter
Figure 8 shows a circuit to shift from bipolar ±5V inputs
to TTL signals. The 10k
resistors protect the
comparator inputs, and do not materially affect the
operation of the circuit.
V
(V
V )
R2
R1
R3)
Undervoltage threshold :
5.474V.
V
(V
V )
(R1
R2
R3)
(R1 + R2)
4.484V,
where the hysteresis voltage V
V
R5
R4
UTH
REF
H
REF
+
+
=
=
×
+
+
=
=
×
.
(R2 + R3)
.068M
1.006M
R2
1 9
.
6
k
1
R2
(R1 + R2 + R3)
V )
H
V
R1
(294k + 1.068M)
(1.182
0.005)
4.5
294k
62.2k
Choose R2
61.9k (1% standard value).
REF
UTH
=
×
=
=
R2
R3
R1
V
1
294k
5.5
+
(1.182
0.005)
1
1.068M
OTH
H
+
=
×
+
=
×
MAX923
INB-
REF
HYST
INA+
V-
V+
OUTA
OUTB
10k
R5
2.4M
R1
R2
R3
UNDERVOLTAGE
POWER GOOD
OVERVOLTAGE
V
IN
V
OTH
= 5.5V
V
UTH
= 4.5V
R4
+5V
Figure 6. Window Detector
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX923 | Ultra Low-Power, Single/Dual-Supply Comparators |
| MAX923CPA | Ultra Low-Power, Single/Dual-Supply Comparators |
| MAX923CSA | Ultra Low-Power, Single/Dual-Supply Comparators |
| MAX923EPA | Ultra Low-Power, Single/Dual-Supply Comparators |
| MAX923ESA | Ultra Low-Power, Single/Dual-Supply Comparators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9220 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Programmable DC-Balance 21-Bit Deserializers |
| MAX9220ETM | 功能描述:串行器/解串器 - Serdes DC-Balanced Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64 |
| MAX9220EUM | 功能描述:串行器/解串器 - Serdes DC-Balanced Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64 |
| MAX9220EUM/V+ | 功能描述:串行器/解串器 - Serdes Programmable DC-Bal 21-Bit Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64 |
| MAX9220EUM/V+T | 功能描述:串行器/解串器 - Serdes Programmable DC-Bal 21-Bit Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。