VIH High Level Input " />
參數(shù)資料
型號(hào)： LTC1291CCN8#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 14/20頁(yè)
文件大?。?/td> 0K
描述： IC DATA ACQ SYSTEM 12BIT 8-DIP
標(biāo)準(zhǔn)包裝： 50
類(lèi)型： 數(shù)據(jù)采集系統(tǒng)（DAS）
分辨率（位）： 12 b
數(shù)據(jù)接口： 串行，并聯(lián)
電壓電源： 單電源
電源電壓： 5V
工作溫度： 0°C ~ 70°C
安裝類(lèi)型： 通孔
封裝/外殼： 8-DIP（0.300"，7.62mm）
供應(yīng)商設(shè)備封裝： 8-PDIP
包裝： 管件
產(chǎn)品目錄頁(yè)面： 1346 (CN2011-ZH PDF)
3
LTC1291
1291fa
AC CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIH
High Level Input Voltage
VCC = 5.25V
q
2.0
V
VIL
Low Level Input Voltage
VCC = 4.75V
q
0.8
V
IIH
High Level Input Current
VIN = VCC
q
2.5
A
IIL
Low Level Input Current
VIN = 0V
q
–2.5
A
VOH
High Level Output Voltage
VCC = 4.75V, IOUT = –10
A
4.7
V
VCC = 4.75V, IOUT = – 360
A
q
2.4
4.0
V
VOL
Low Level Output Voltage
VCC = 4.75V, IOUT = 1.6mA
q
0.4
V
IOZ
High Z Output Leakage
VOUT = VCC, CS High
q
3
A
VOUT = 0V, CS High
q
–3
A
ISOURCE
Output Source Current
VOUT = 0V
– 20
mA
ISINK
Output Sink Current
VOUT = VCC
20
mA
ICC
Positive Supply Current
CS High
q
612
mA
CS High Power Shutdown CLK Off
q
510
A
LTC1291B/LTC1291C/LTC1291D
ELECTRICAL C
C
HARA TER STICS
DIGITAL A D
U
I
DC
Note 7: Two on-chip diodes are tied to each analog input which will
conduct for analog voltages one diode drop below GND or one diode drop
above VCC. Be careful during testing at low VCC levels (4.5V), as high level
analog inputs (5V) can cause this input diode to conduct, especially at
elevated temperature, and cause errors for inputs near full scale. This spec
allows 50mV forward bias of either diode. This means that as long as the
analog input does not exceed the supply voltage by more than 50mV, the
output code will be correct.
Note 8: Channel leakage current is measured after the channel selection.
Note 9: Increased leakage currents at elevated temperatures cause the
S/H to droop, therefore it is recommended that fCLK
≥ 125kHz at 125°C,
fCLK
≥ 30kHz at 85°C and fCLK ≥ 3kHz at 25°C.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to ground (unless otherwise
noted).
Note 3: VCC = 5V, CLK = 1.0MHz unless otherwise specified.
Note 4: One LSB is equal to VCC divided by 4096. For example, when VCC =
5V, 1LSB = 5V/4096 = 1.22mV.
Note 5: Linearity error is specified between the actual end points of the
A/D transfer curve. The deviation is measured from the center of the
quantization band.
Note 6: Recommended operating conditions.
The q denotes the specifications which
apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3)
The q denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at TA = 25°C. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tdis
Delay Time, CS
↑ to DOUT Hi-Z
See Test Circuits
q
80
150
ns
ten
Delay Time, CLK
↓ to DOUT Enabled
See Test Circuits
q
80
200
ns
thDI
Hold Time, DIN after CLK
↑
VCC = 5V (Note 6)
50
ns
thDO
Time Output Data Remains Valid after CLK
↓
130
ns
tWHCLK
CLK High Time
VCC = 5V (Note 6)
300
ns
tWLCLK
CLK Low Time
VCC = 5V (Note 6)
400
ns
tf
DOUT Fall Time
See Test Circuits
q
65
130
ns
tr
DOUT Rise Time
See Test Circuits
q
25
50
ns
tsuDI
Setup Time, DIN Stable before CLK
↑
VCC = 5V (Note 6)
50
ns
tsuCS
Setup Time, CS
↓ before CLK↑
VCC = 5V (Note 6)
50
ns
tWHCS
CS High Time During Conversion
VCC = 5V (Note 6)
500
ns
tWLCS
CS Low Time During Data Transfer
VCC = 5V (Note 6)
18
CLK Cycles
CIN
Input Capacitance
Analog Inputs On Channel
100
pF
Analog Inputs Off Channel
5
pF
Digital Inputs
5
pF
LTC1291B/LTC1291C/LTC1291D
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