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參數資料
| 型號： | LTC1598CG |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 8-Bit, 25kSPS ADC Serial-Out, On-Chip 11-Ch. Analog MUX 20-PDIP |
| 中文描述： | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24 |
| 封裝： | 0.209 INCH, PLASTIC, SSOP-24 |
| 文件頁數： | 4/24頁 |
| 文件大?。?/td> | 430K |
| 代理商： | LTC1598CG |
4
LTC1594/LTC1598
SYMBOL
t
SMPL
f
SMPL(MAX)
t
CONV
t
dDO
t
dis
t
en
t
hDO
t
f
t
r
t
ON
t
OFF
t
OPEN
C
IN
PARAMETER
Analog Input Sample Time
Maximum Sampling Frequency
Conversion Time
Delay Time, CLK
↓
to D
OUT
Data Valid
Delay Time, CS
↑
to D
OUT
Hi-Z
Delay Time, CLK
↓
to D
OUT
Enabled
Time Output Data Remains Valid After CLK
↓
D
OUT
Fall Time
D
OUT
Rise Time
Enable Turn-On Time
Enable Turn-Off Time
Break-Before-Make Interval
Input Capacitance
CONDITIONS
See Figure 1 in Applications Information
See Figure 1 in Applications Information
See Figure 1 in Applications Information
See Test Circuits
See Test Circuits
See Test Circuits
C
LOAD
= 100pF
See Test Circuits
See Test Circuits
See Figure 1 in Applications Information
See Figure 2 in Applications Information
MIN
1.5
16.8
TYP
MAX
UNITS
CLK Cycles
G
kHz
12
250
135
75
230
50
50
260
100
160
20
5
5
CLK Cycles
G
600
300
200
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
pF
pF
G
G
G
150
150
700
300
G
G
G
G
35
Analog Inputs On-Channel
Off-Channel
Digital Input
(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 5V. Consult factory for 3V
specified devices (LTC1594L/LTC1598L).
Note 4:
Increased leakage currents at elevated temperatures cause the S/H
to droop, therefore it is recommended that f
CLK
≥
160kHz at 85
°
C,
f
CLK
≥
75kHz at 70
°
C and f
CLK
≥
1kHz at 25
°
C.
Note 5:
V
CC
= 5V, V
REF
= 5V and CLK = 320kHz unless otherwise specified.
CSADC and CSMUX pins are tied together during the test.
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 4.5V
≤
V
CC
≤
5.5V. 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 5V
input voltage range, it will therefore require a minimum supply voltage of
4.950V over initial tolerance, temperature variations and loading.
Note 8:
Recommended operating condition.
Note 9:
Channel leakage current is measured after the channel selection.
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
SAMPLE FREQUENCY (kHz)
0.1
1
S
μ
A
10
100
1000
1
10
100
1594/98 G01
T
A
= 25
°
C
V
CC
= 5V
V
REF
= 5V
f
CLK
= 320kHz
Supply Current vs Sample Rate
TEMPERATURE (
°
C)
–55
92.0
R
μ
A
92.5
93.5
94.0
94.5
–15
25
45
125
1594/98 G03
93.0
–35
5
65
85 105
95.0
V
CC
= V
= 5V
f
SMPL
= 16.8kHz
f
CLK
= 320kHz
TEMPERATURE (
°
C)
–55
200
S
μ
A
250
350
400
450
–15
25
45
125
1594/98 G02
300
–35
5
65
85 105
T
A
= 25
°
C
V
CC
= V
REF
= 5V
f
CLK
= 320kHz
f
SMPL
= 16.8kHz
Supply Current vs Temperature
Reference Current vs Temperature
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