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參數(shù)資料
| 型號(hào)： | LT1011ACN8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Voltage Comparator |
| 中文描述： | COMPARATOR, 1000 uV OFFSET-MAX, 150 ns RESPONSE TIME, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大小： | 205K |
| 代理商： | LT1011ACN8 |
6
LT1011/LT1011A
TYPICAL PERFOR U
Input Offset Voltage
vs Common Mode Voltage
COMMON MODE VOLTAGE (V)
V
–
V
+
I
0.5
1.5
2.5
1011 G19
–0.5
–1.5
0
1.0
2.0
–1.0
–2.0
–2.5
0.1 0.2 0.3 0.4 0.5 0.6 0.7
T
J
= 25
°
C
UPPER
COMMON MODE
LIMIT = V
+
– (1.5V)
V
–
(OR GND WITH
SINGLE SUPPLY)
TEMPERATURE (
°
C)
–50 –25
C
O
μ
A
0
0.2
0.4
75
100 125 150
1011 G20
–150mV
–100mV
–50mV
0
0
25
50
0.8
0.6
CHANGE IN V
FOR CURRENT
INTO PINS 5 OR 6
VOLTAGE ON PINS 5 AND 6
WITH RESPECT TO V
+
Offset Pin Characteristics
APPLICATIO
S I
FOR
ATIO
U
W
U
U
Preventing Oscillation Problems
Oscillation problems in comparators are nearly always
caused by stray capacitance between the output and
inputs or between the output and other sensitive pins on
the comparator. This is especially true with high gain
bandwidth comparators like the LT1011, which are
designed for fast switching with millivolt input signals.
The gain bandwidth product of the LT1011 is over 10GHz.
Oscillation problems tend to occur at frequencies around
5MHz, where the LT1011 has a gain of
≈
2000. This
implies that attenuation of output signals must be at
least 2000:1 at 5MHz as measured at the inputs. If the
source impedance is 1k
, the effective stray capaci-
tance between output and input must have a reactance
of more than (2000)(1k
) = 2M
, or less than 0.02pF.
The actual interlead capacitance between input and out-
put pins on the LT1011 is less than 0.002pF when cut to
printed circuit mount length. Additional stray capaci-
tance due to printed circuit traces must be minimized by
routing the output trace directly away from input lines
and, if possible, running ground traces next to input
traces to provide shielding. Additional steps to ensure
oscillation-free operation are:
1. Bypass the STROBE/BALANCE pins with a 0.01
μ
F
capacitor connected from Pin 5 to Pin 6. This elimi-
nates stray capacitive feedback from the output to the
BALANCE pins, which are nearly as sensitive as the
inputs.
2. Bypass the negative supply (Pin 4) with a 0.1
μ
F
ceramic capacitor close to the comparator. 0.1
μ
F can
also be used for the positive supply (Pin 8) if the pull-
up load is tied to a separate supply. When the pull-up
load is tied directly to Pin 8, use a 2
μ
F solid tantalum
bypass capacitor.
3. Bypass any slow moving or DC input with a capacitor
(
≥
0.01
μ
F) close to the comparator to reduce high
frequency source impedance.
4. Keep resistive source impedance as low as possible. If
a resistor is added in series with one input to balance
source impedances for DC accuracy, bypass it with a
capacitor. The low input bias current of the LT1011
usually eliminates any need for source resistance bal-
ancing. A 5k
imbalance, for instance, will create only
0.25mV DC offset.
5. Use hysteresis. This consists of shifting the input
offset voltage of the comparator when the output
changes state. Hysteresis forces the comparator to
move quickly through its linear region, eliminating
oscillations by “overdriving” the comparator under all
input conditions. Hysteresis may be either AC or DC.
AC techniques do not shift the apparent offset voltage
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| LT1011ACN8#PBF | 功能描述:IC VOLTAGE COMPARATOR 5V 8-DIP RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:通用 元件數(shù):1 輸出類型:CMOS，開路集電極，TTL 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V 電壓 - 輸入偏移（最小值）:7mV @ 5V 電流 - 輸入偏壓（最小值）:0.25µA @ 5V 電流 - 輸出（標(biāo)準(zhǔn)）:84mA @ 5V 電流 - 靜態(tài)（最大值）:120µA CMRR, PSRR（標(biāo)準(zhǔn)）:- 傳輸延遲（最大）:600ns 磁滯:- 工作溫度:-40°C ~ 85°C 封裝/外殼:SC-74A，SOT-753 安裝類型:表面貼裝 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1268 (CN2011-ZH PDF) 其它名稱:*LMV331M5*LMV331M5/NOPBLMV331M5CT |
| LT1011ACN8PBF | 制造商:Linear Technology 功能描述:Voltage Comparator 50mA 30V PDIP8 |
| LT1011ACP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Comparator |
| LT1011AIS8 | 功能描述:IC VOLTAGE COMPARATOR 5V 8-SOIC RoHS:否 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(biāo)準(zhǔn)）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標(biāo)準(zhǔn)）: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 |
| LT1011AIS8#PBF | 功能描述:IC VOLTAGE COMPARATOR 5V 8-SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:通用 元件數(shù):1 輸出類型:CMOS，開路集電極，TTL 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V 電壓 - 輸入偏移（最小值）:7mV @ 5V 電流 - 輸入偏壓（最小值）:0.25µA @ 5V 電流 - 輸出（標(biāo)準(zhǔn)）:84mA @ 5V 電流 - 靜態(tài)（最大值）:120µA CMRR, PSRR（標(biāo)準(zhǔn)）:- 傳輸延遲（最大）:600ns 磁滯:- 工作溫度:-40°C ~ 85°C 封裝/外殼:SC-74A，SOT-753 安裝類型:表面貼裝 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1268 (CN2011-ZH PDF) 其它名稱:*LMV331M5*LMV331M5/NOPBLMV331M5CT |
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