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參數(shù)資料
| 型號： | LTC1285CN8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 3V Micropower Sampling 12-Bit A/D Converters in SO-8 Packages |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 412K |
| 代理商： | LTC1285CN8 |
4
LTC1285/LTC1288
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
SYMBOL
t
SMPL
f
SMPL(MAX)
PARAMETER
Analog Input Sample Time
Maximum Sampling Frequency
CONDITIONS
See Operating Sequence
LTC1285
LTC1288
See Operating Sequence
See Test Circuits
See Test Circuits
See Test Circuits
C
LOAD
= 100pF
See Test Circuits
See Test Circuits
Analog Inputs, On Channel
Analog Inputs, Off Channel
Digital Input
MIN
TYP
1.5
MAX
UNITS
CLK Cycles
G
G
7.5
6.6
kHz
kHz
t
CONV
t
dDO
t
dis
t
en
t
hDO
t
f
t
r
C
IN
Conversion Time
Delay Time, CLK
↓
to D
OUT
Data Valid
Delay Time, CS
↑
to D
OUT
Hi-Z
Delay Time, CLK
↓
to D
OUT
Enable
Time Output Data Remains Valid After CLK
↓
D
OUT
Fall Time
D
OUT
Rise Time
Input Capacitance
12
600
220
180
520
60
80
20
5
5
CLK Cycles
G
1500
660
500
ns
ns
ns
ns
ns
ns
pF
pF
pF
G
G
G
180
180
G
(Note 5)
AC CHARACTERISTICS
The
G
denotes specifications which apply over the full operating
temperature range.
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 GND.
Note 3:
These devices are specified at 3V. For 5V specified devices, see
LTC1286 and LTC1298.
Note 4:
Increased leakage currents at elevated temperatures cause the
sample-and-hold to droop, therefore it is recommended that f
CLK
≥
75kHz
at 70
°
andf
CLK
≥
1kHz at 25
°
C.
Note 5:
V
CC
= 2.7V, V
REF
= 2.5V and CLK = 120kHz unless otherwise
specified.
Note 6:
Linearity error is specified between the actual end points of the
A/D transfer curve.
Note 7:
Two on-chip diodes are tied to each reference and analog input
which will conduct for reference or analog input voltages one diode drop
below GND or one diode drop above V
CC
. This spec allows 50mV forward
bias of either diode for 2.7V
≤
V
CC
≤
6V. This means that as long as the
reference or analog input does not exceed the supply voltage by more than
50mV the output code will be correct. To achieve an absolute 0V to 2.7V
input voltage range will therefore require a minimum supply voltage of
2.650V over initial tolerance, temperature variations and loading. For 2.7V
< V
CC
≤
6V, reference and analog input range cannot exceed 6.05V. If
reference and analog input range are greater than 6.05V, the output code
will not be guaranteed to be correct.
Note 8:
The supply voltage range for the LTC1285 and the LTC1288 is
from 2.7V to 6V.
Note 9:
Recommended operating conditions
Note 10:
Channel leakage current is measured after the channel selection.
SAMPLE RATE (kHz)
0.1
1
S
μ
A
10
1000
100
1
10
LTC1285/88 TPC01
LTC1288
LTC1285
T
A
= 25°C
V
CC
= 2.7V
V
REF
= 2.5V
f
CLK
= 120kHz
Supply Current vs Sample Rate
FREQUENCY (kHz)
1
0
S
μ
A
1
2
3
4
5
6
20
40
60
80
LTC1285/88 TPC03
100
7
8
9
0.002
120
T
A
= 25°C
V
CC
= 2.7V
V
REF
= 2.5V
CS = 0
(AFTER CONVERSION)
CS = V
CC
Shutdown Supply Current vs Clock
Rate with CS High and CS Low
TEMPERATURE (°C)
–55
S
μ
A
150
200
250
105
LTC1285/88 TPC02
100
50
0
–15
25
65
–35
125
5
45
85
V
CC
= 2.7V
V
REF
= 2.5V
f
CLK
= 120kHz
LTC1285
f
SMPL
= 7.5kHz
LTC1288
f
SMPL
= 6.6kHz
Supply Current vs Temperature
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1285CS8 | 3V Micropower Sampling 12-Bit A/D Converters in SO-8 Packages |
| LTC1288 | Single Channel Codec-Bandwidth Independent of Sampling Rate 28-PLCC 0 to 70 |
| LTC1288CS8 | 3V Micropower Sampling 12-Bit A/D Converters in SO-8 Packages |
| LTC1289BC | 3 Volt Single Chip 12-Bit Data Acquisition System |
| LTC1289CCJ | 3 Volt Single Chip 12-Bit Data Acquisition System |
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