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參數(shù)資料
| 型號： | LTC1843I |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Hex Inverter 14-SOIC -40 to 85 |
| 中文描述： | 超低功耗雙比較參考 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 249K |
| 代理商： | LTC1843I |
8
LTC1841/LTC1842/LTC1843
Figure 3a. Power Supply Transient Test Circuit
APPLICATIO
S I
FOR
ATIO
U
W
U
U
8V
V
+
5V
V
REF
OUT
2
2ms/DIV
1841/1843 F03b
Figure 3b. Power Supply Transient Rejection
Hysteresis
Hysteresis can be added to the LTC1842/LTC1843 by
connecting a resistor (R1) between the REF and HYST pins
and a second resistor (R2) from HYST to V
–
(Figure 4).
The difference between the upper and lower threshold
voltages, or hysteresis voltage band (V
HB
), is equal to twice
the voltage difference between the REF and HYST pins.
As more hysteresis is added, the upper threshold in-
creases the same amount as the low threshold decreases.
The maximum voltage allowed between REF and HYST
pins is 50mV, producing a maximum hysteresis voltage
band of 100mV. The hysteresis band may vary by up to
Figure 4. Programmable Hysteresis
15%. If hysteresis is not wanted, the HYST pin should be
shorted to REF. Acceptable values for I
REF
range are from
0.1
μ
A to 5
μ
A. If 2.4M is chosen for R2, then the value of
R1 is equal to the value of V
HB
.
Window Detector
The LTC1843 is ideal for use as a micropower window
detector as shown in Figure 5. The values of R1, R2 and R3
are selected for a 4.5V undervoltage threshold and a 5.5V
overvoltage threshold. R4 and R5 set the hysteresis volt-
age. The following design procedure can be used to select
the component values:
–
+
–
+
IN A
+
V
OTH
= 5.5V
V
UTH
= 4.5V
R4
2.4M
R1
294k
R2
62.2k
R3
1M
1M
R5
10k
HYST
REF
3
5V
5
6
IN B
–
V
–
2
V
+
V
IN
LTC1843
4
OUT B
1841/43 F05
8
OUT A 1
7
Figure 5. Dual Level Detector
6
R2
5
R1
1841/43 F04
2
I
REF
R1 =
V
HB
(2)(I
REF
)
(
R2 =
I
REF
1.182V –
)
V
HB
2
HYST
V
–
REF
LTC1843
V
+
R1
430
C1
1
μ
F
R2
10k
5V
TO
8V
OUT A
OUT A
V
–
2
7
5V
1
LTC1843
1841/43 F03a
IN A
+
HYST
REF
3
5
6
1M
R3
2.4M
–
+
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PDF描述 |
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| LTC1843IS8 | Hex Inverter 14-SOIC -40 to 85 |
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| LTC1841CS8 | RSO-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 09V; Power: 1W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protectionwith Current Foldback; Low Noise; No External Capacitor needed; Efficiency to 83% |
| LTC1841I | RSO-S_D(Z) Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 09V; Power: 1W; 2:1 and 4:1 Wide Input Voltage Ranges; 1kVDC, 2kVD & 3kVDC Isolation; UL94V-0 Package Material; Continuous Short Circuit Protectionwith Current Foldback; Low Noise; No External Capacitor needed; Efficiency to 83% |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1843IS8 | 功能描述:IC COMP ULTLOPWR W/REF DUAL8SOIC RoHS:否 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 標準包裝:25 系列:- 類型:帶電壓基準 元件數(shù):4 輸出類型:CMOS，開路漏極，TTL 電壓 - 電源，單路/雙路(±):2 V ~ 11 V，±1 V ~ 5.5 V 電壓 - 輸入偏移（最小值）:10mV @ 5V 電流 - 輸入偏壓（最小值）:- 電流 - 輸出（標準）:0.015mA @ 5V 電流 - 靜態(tài)（最大值）:8.5µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:12µs 磁滯:50mV 工作溫度:0°C ~ 70°C 封裝/外殼:16-DIP（0.300"，7.62mm） 安裝類型:通孔 包裝:管件 |
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| LTC1843IS8#TR | 功能描述:IC COMPARATOR DUAL ULT LP 8SOIC RoHS:否 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 標準包裝:25 系列:- 類型:帶電壓基準 元件數(shù):4 輸出類型:CMOS，開路漏極，TTL 電壓 - 電源，單路/雙路(±):2 V ~ 11 V，±1 V ~ 5.5 V 電壓 - 輸入偏移（最小值）:10mV @ 5V 電流 - 輸入偏壓（最小值）:- 電流 - 輸出（標準）:0.015mA @ 5V 電流 - 靜態(tài)（最大值）:8.5µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:12µs 磁滯:50mV 工作溫度:0°C ~ 70°C 封裝/外殼:16-DIP（0.300"，7.62mm） 安裝類型:通孔 包裝:管件 |
| LTC1843IS8#TRPBF | 功能描述:IC COMP ULTLOPWR W/REF DL 8SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 標準包裝:25 系列:- 類型:帶電壓基準 元件數(shù):4 輸出類型:CMOS，開路漏極，TTL 電壓 - 電源，單路/雙路(±):2 V ~ 11 V，±1 V ~ 5.5 V 電壓 - 輸入偏移（最小值）:10mV @ 5V 電流 - 輸入偏壓（最小值）:- 電流 - 輸出（標準）:0.015mA @ 5V 電流 - 靜態(tài)（最大值）:8.5µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:12µs 磁滯:50mV 工作溫度:0°C ~ 70°C 封裝/外殼:16-DIP（0.300"，7.62mm） 安裝類型:通孔 包裝:管件 |
| LTC1844ES5-1.5#PBF | 制造商:Linear Technology 功能描述:LDO Regulator Pos 1.5V 0.15A 5-Pin TSOT-23 制造商:Linear Technology 功能描述:LDO 0.35VDO 0.15A 1.5V 5TSOT23 制造商:Linear Technology 功能描述:LDO, 0.35VDO, 0.15A, 1.5V, 5TSOT23 制造商:Linear Technology 功能描述:DP-LINREG, CUT TAPE 1.5V, Micropower, Low Noise VLDO 制造商:Linear Technology 功能描述:LDO, FIXED, 1.5V, 150mA, TSOT-23-5, Input Voltage Min:1.6V, Input Voltage Max:6.5V, Output Current:150mA, Dropout Voltage Vdo:350mV, No. of Pins:5, Operating Temperature Min:-40C, Operating Temperature Max:125C , RoHS Compliant: Yes |
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