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參數(shù)資料
| 型號： | LTC1442CS8#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMP W/REF LP DUAL 8-SOIC |
| 標準包裝： | 100 |
| 類型： | 帶電壓基準 |
| 元件數(shù)： | 2 |
| 輸出類型： | CMOS，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 - 輸出（標準）： | 0.02mA @ 5V |
| 電流 - 靜態(tài)（最大值）： | 5.7µA |
| CMRR, PSRR（標準）： | 80dB CMRR，80dB PSRR |
| 傳輸延遲（最大）： | 15µs |
| 磁滯： | 50mV |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 安裝類型： | 表面貼裝 |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1324 (CN2011-ZH PDF) |
10
LTC1440/LTC1441/LTC1442
144012fd
LTC1440/LTC1441/LTC1442 are a family of micropower
comparators with built-in 1.182V reference. Features
include programmable hysteresis (LTC1440/LTC1442),
wide supply voltage range (2V to 11V) and the ability of the
reference to drive up to a 0.01
F capacitor without oscil-
lation. The comparators’ CMOS outputs can source up to
40mA and the supply current glitches, that normally occur
when switching logic states, have been eliminated.
Power Supplies
The comparator family operates from a single 2V to 11V
supply. The LTC1440 includes a separate ground for the
comparator output stage, allowing a split supply ranging
from
±1Vto±5.5V.ConnectingV–toGNDontheLTC1440
will allow single supply operation. If the comparator out-
put is required to source more than 1mA, or the supply
source impedance is high, V + should be bypassed with a
0.1
F capacitor.
Comparator Inputs
The comparator inputs can swing from the negative sup-
ply V – to within 1.3V max of the positive supply V +. The
inputs can be forced 300mV below V – or above V + without
damage and the typical input leakage current is only
±10pA.
Comparator Outputs
The LTC1440 comparator output swings between GND
and V + to assure TTL compatibility with a split supply. The
LTC1441 and LTC1442 outputs swing between V – and V +.
The outputs are capable of sourcing up to 40mA and
sinking up to 5mA while still maintaining microampere
quiescent currents. The output stage does not generate
crowbar switching currents during transitions which helps
minimize parasitic feedback through the supply pins.
Voltage Reference
The internal bandgap reference has a voltage of 1.182V
referenced to V –. The reference accuracy is 1.5% from
–40
°C to 85°C. It can source up to 200A and sink up to
20
A with a 5V supply. The reference can drive a bypass
capacitor of up to 0.01
F without oscillation and by
inserting a series resistor, capacitance values up to 100
F
can be used (Figure 1).
Figure 2 shows the resistor value required for different
capacitor values to achieve critical damping. Bypassing
the reference can help prevent false tripping of the com-
parators by preventing glitches on V + or reference load
transients from disturbing the reference output voltage.
Figure 3 shows the bypassed reference output with a
square wave applied to the V + pin. Resistors R2 and R3 set
10mV of hysteresis voltage band while R1 damps the
reference response. Note that the comparator output
doesn’t trip.
APPLICATIONS INFORMATION
WU
U
LTC144X
V –
REF
R1
C1
REFERENCE
OUTPUT
1440/1/2 F01
Figure 1. Damping the Reference Output
CAPACITOR VALUE (
F)
0.001
0.1
RESISTOR
VALUE
(k
)
10
1000
0.01
0.1
10
1
1440/1/2 F02
1
100
Figure 2. Damping Resistance vs Bypass Capacitor Value
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| LTC1442IN8 | 功能描述:IC COMP W/REF LP DUAL 8-DIP RoHS:否 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 類型:通用 元件數(shù):1 輸出類型:CMOS，推挽式，滿擺幅，TTL 電壓 - 電源，單路/雙路(±):2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V 電壓 - 輸入偏移（最小值）:5mV @ 5.5V 電流 - 輸入偏壓（最小值）:1pA @ 5.5V 電流 - 輸出（標準）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:450ns 磁滯:±3mV 工作溫度:-40°C ~ 85°C 封裝/外殼:6-WFBGA，CSPBGA 安裝類型:表面貼裝 包裝:管件 其它名稱:Q3554586 |
| LTC1442IN8#PBF | 功能描述:IC COMP W/REF LP DUAL 8-DIP RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 類型:通用 元件數(shù):1 輸出類型:CMOS，推挽式，滿擺幅，TTL 電壓 - 電源，單路/雙路(±):2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V 電壓 - 輸入偏移（最小值）:5mV @ 5.5V 電流 - 輸入偏壓（最小值）:1pA @ 5.5V 電流 - 輸出（標準）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:450ns 磁滯:±3mV 工作溫度:-40°C ~ 85°C 封裝/外殼:6-WFBGA，CSPBGA 安裝類型:表面貼裝 包裝:管件 其它名稱:Q3554586 |
| LTC1442IS8 | 功能描述:IC COMP W/REF LP DUAL 8-SOIC RoHS:否 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 類型:通用 元件數(shù):1 輸出類型:CMOS，推挽式，滿擺幅，TTL 電壓 - 電源，單路/雙路(±):2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V 電壓 - 輸入偏移（最小值）:5mV @ 5.5V 電流 - 輸入偏壓（最小值）:1pA @ 5.5V 電流 - 輸出（標準）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:450ns 磁滯:±3mV 工作溫度:-40°C ~ 85°C 封裝/外殼:6-WFBGA，CSPBGA 安裝類型:表面貼裝 包裝:管件 其它名稱:Q3554586 |
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| LTC1442IS8#PBF | 制造商:Linear Technology 功能描述:Micropower Comparator IC |
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