LTC1291DM 查看數據表（PDF） - Linear Technology
零件编号
产品描述 (功能)
生产厂家
LTC1291DM Datasheet PDF : 20 Pages
| |||
LTC1291
AC CHARACTERISTICS (Note 3)
SYMBOL
tdis
ten
thDI
thDO
tWHCLK
tWLCLK
tf
tr
tsuDI
tsuCS
tWHCS
tWLCS
CIN
PARAMETER
Delay Time, CS↑ to DOUT Hi-Z
Delay Time, CLK↓ to DOUT Enabled
Hold Time, DIN after CLK↑
Time Output Data Remains Valid after CLK↓
CLK High Time
CLK Low Time
DOUT Fall Time
DOUT Rise Time
Setup Time, DIN Stable before CLK↑
Setup Time, CS↓ before CLK↑
CS High Time During Conversion
CS Low Time During Data Transfer
Input Capacitance
CONDITIONS
See Test Circuits
See Test Circuits
VCC = 5V (Note 6)
VCC = 5V (Note 6)
VCC = 5V (Note 6)
See Test Circuits
See Test Circuits
VCC = 5V (Note 6)
VCC = 5V (Note 6)
VCC = 5V (Note 6)
VCC = 5V (Note 6)
Analog Inputs On Channel
Analog Inputs Off Channel
Digital Inputs
LTC1291B/LTC1291C/LTC1291D
MIN TYP MAX
UNITS
q
80 150
ns
q
80 200
ns
50
ns
130
ns
300
ns
400
ns
q
65 130
ns
q
25 50
ns
50
ns
50
ns
500
ns
18
CLK Cycles
100
pF
5
pF
5
pF
DIGITAL A D DC ELECTRICAL CHARACTERISTICS (Note 3)
SYMBOL PARAMETER
CONDITIONS
LTC1291B/LTC1291C/LTC1291D
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
µA
IIL
Low Level Input Current VIN = 0V
q
–2.5
µA
VOH
High Level Output Voltage VCC = 4.75V, IOUT = –10µA
VCC = 4.75V, IOUT = – 360µA
4.7
V
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
VOUT = 0V, CS High
q
3
µA
q
–3
µA
ISOURCE Output Source Current
VOUT = 0V
– 20
mA
ISINK
Output Sink Current
VOUT = VCC
20
mA
ICC
Positive Supply Current CS High
q
6
12
mA
CS High
LTC1291BC, LTC1291CC, LTC1291DC q
Power shutdown LTC1291BI, LTC1291CI, LTC1291DI, q
CLK Off
LTC1291BM, LTC1291CM, LTC1291DM
5
10
µA
5
15
µA
The q denotes specifications which apply over the operating temperature
range; all other limits and typicals TA = 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.
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.
3
Share Link: 