參數(shù)資料
型號: LT1720IDD#PBF
廠商: Linear Technology
文件頁數(shù): 23/28頁
文件大小: 0K
描述: IC COMPARATOR DUAL HS 3/5V 8-DFN
標準包裝: 121
系列: UltraFast™
類型: 通用
元件數(shù): 2
輸出類型: CMOS,滿擺幅,TTL
電壓 - 電源,單路/雙路(±): 2.7 V ~ 6 V
電壓 - 輸入偏移(最小值): 3mV @ 5V
電流 - 輸入偏壓(最小值): 6µA @ 5V
電流 - 輸出(標準): 20mA
電流 - 靜態(tài)(最大值): 7mA
CMRR, PSRR(標準): 70dB CMRR,80dB PSRR
傳輸延遲(最大): 10ns
磁滯: 7mV
工作溫度: -40°C ~ 85°C
封裝/外殼: 8-WFDFN 裸露焊盤
安裝類型: 表面貼裝
包裝: 管件
LT1720/LT1721
4
17201fc
TYPICAL PERFORMANCE CHARACTERISTICS
SUPPLY VOLTAGE (V)
2.5
V
OS
AND
TRIP
POINT
VOLTAGE
(mV)
3
2
1
0
–1
–2
–3
4.0
5.0
17201 G01
3.0
3.5
4.5
5.5
6.0
VTRIP
+
VOS
VTRIP
25°C
VCM = 1V
TEMPERATURE (°C)
–3
V
OS
AND
TRIP
POINT
VOLTAGE
(mV)
–1
1
3
–2
0
2
–25
25
100
17201 G02
–50
0
50
75
125
VTRIP
+
VOS
VTRIP
TEMPERATURE (°C)
–50
3.6
3.8
4.2
25
75
17201 G03
0.2
0
–25
0
50
100
125
–0.2
–0.4
4.0
COMMON
MODE
INPUT
VOLTAGE
(V)
VCC = 5V
Input Offset and Trip Voltages
vs Supply Voltage
Input Offset and Trip Voltages
vs Temperature
Input Common Mode Limits
vs Temperature
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: If one input is within these common mode limits, the other input
can go outside the common mode limits and the output will be valid.
Note 3: The LT1720/LT1721 comparators include internal hysteresis.
The trip points are the input voltage needed to change the output state in
each direction. The offset voltage is dened as the average of VTRIP+ and
VTRIP–, while the hysteresis voltage is the difference of these two.
Note 4: The common mode rejection ratio is measured with VCC = 5V
and is dened as the change in offset voltage measured from VCM = –0.1V
to VCM = 3.8V, divided by 3.9V.
Note 5: The power supply rejection ratio is measured with VCM = 1V and
is dened as the change in offset voltage measured from VCC = 2.7V to
VCC = 6V, divided by 3.3V.
ELECTRICAL CHARACTERISTICS The l denotes specications that apply over the full operating temperature
range, otherwise specications are at TA = 25°C. VCC = 5V, VCM = 1V, COUT = 10pF, VOVERDRIVE = 20mV, unless otherwise specied.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ΔtPD
Differential Propagation Delay
(Note 9) Between Channels
0.3
1.0
ns
tSKEW
Propagation Delay Skew
(Note 10) Between tPDLH/tPDHL
0.5
1.5
ns
tr
Output Rise Time
10% to 90%
2.5
ns
tf
Output Fall Time
90% to 10%
2.2
ns
tJITTER
Output Timing Jitter
VIN = 1.2VP-P (6dBm), ZIN = 50Ω
tPDLH
VCM = 2V, f = 20MHz
tPDHL
15
11
psRMS
fMAX
Maximum Toggle Frequency
VOVERDRIVE = 50mV, VCC = 3V
VOVERDRIVE = 50mV, VCC = 5V
70.0
62.5
MHz
Note 6: Because of internal hysteresis, there is no small-signal region
in which to measure gain. Proper operation of internal circuity is ensured
by measuring VOH and VOL with only 10mV of overdrive.
Note 7: Propagation delay measurements made with 100mV steps.
Overdrive is measured relative to VTRIP±.
Note 8: tPD cannot be measured in automatic handling equipment with
low values of overdrive. The LT1720/LT1721 are 100% tested with a
100mV step and 20mV overdrive. Correlation tests have shown that
tPD limits can be guaranteed with this test, if additional DC tests are
performed to guarantee that all internal bias conditions are correct.
Note 9: Differential propagation delay is dened as the larger of the two:
ΔtPDLH = tPDLH(MAX) – tPDLH(MIN)
ΔtPDHL = tPDHL(MAX) – tPDHL(MIN)
where (MAX) and (MIN) denote the maximum and minimum values
of a given measurement across the different comparator channels.
Note 10: Propagation Delay Skew is dened as:
tSKEW = |tPDLH – tPDHL|
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