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參數(shù)資料
| 型號(hào)： | LTC1283ACN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 3V Single Chip 10-Bit Data Acquisition System |
| 中文描述： | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 452K |
| 代理商： | LTC1283ACN |
4
LTC1283
ELECTRICAL C
HARA TER STICS
DIGITAL A D
U
DC
SYMBOL
I
OZ
PARAMETER
Hi-Z Output Leakage
CONDITIONS
V
OUT
= V
CC
, CS High
V
OUT
= 0V, CS High
V
OUT
= 0V
V
OUT
= V
CC
CS High, REF
+
Open
V
REF
= 2.5V
CS High, V
–
= –3V
MIN
TYP
MAX
3
–3
UNITS
G
G
μ
A
μ
A
mA
mA
μ
A
μ
A
μ
A
I
SOURCE
I
SINK
I
CC
I
REF
I
–
Output Source Current
Output Sink Current
Positive Supply Current
Reference Current
Negative Supply Current
–4.5
4.5
150
250
–1
G
350
500
–50
G
G
LTC1283/LTC1283A
(Note 3)
The
G
denotes specifications which apply over the operating temperature
range; all other limits and typicals T
A
= 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 with DGND, AGND
and REF
–
wired together (unless otherwise noted).
Note 3:
V
CC
= 3V, V
REF+
= 2.5V, V
REF–
= 0V, V
–
= 0V for unipolar mode
and –3V for bipolar mode, ACLK = 1MHz, SCLK = 0.25MHz unless
otherwise specified.
Note 4:
These specifications apply for both unipolar and bipolar modes. In
bipolar mode, one LSB is equal to the bipolar input span (2V
REF
) divided
by 1024. For example, when V
REF
= 2.5V, 1LSB (bipolar) = 2(2.5V)/1024 =
4.88mV.
Note 5:
Linearity error is the deviation from ideal of the slope between the
two end points of the transfer curve.
Note 6:
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 V
–
or one diode drop above V
CC
. Be careful during testing at low
V
CC
levels, as high level reference or analog inputs can cause this input
diode to conduct, especially at elevated temperatures, and cause errors for
inputs near full scale. This spec allows 50mV forward bias of either diode.
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.
Note 7:
Channel leakage current is measured after the channel selection.
Note 8:
To minimize errors caused by noise at the chip select input, the
internal circuitry waits for two ACLK falling edges after a chip select falling
edge is detected before responding to control input signals. Therefore, no
attempt should be made to clock an address in or data out until the
minimum chip select setup time has elapsed.
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
Supply Current vs Temperature
Reference Current vs Temperature
AMBIENT TEMPERATURE (°C)
–50
0
S
C
μ
A
100
250
0
50
75
LTC1283 G01
50
200
150
–25
25
100
125
REF
+
OPEN
ACLK = 500kHz
V
CC
= CS = 3V
REFERENCE VOLTAGE (V)
0
6
8
10
2.0
LTC1283 G03
4
2
0
0.5
1.0
1.5
2.5
5
7
9
3
1
V
CC
= 3V
ACLK = 500kHz
O
1
1
×
R
)
Unadjusted Offset Error
vs Reference Voltage
TEMPERATURE (°C)
–50
0
I
R
μ
A
200
500
0
50
75
LTC1283 G02
100
400
300
–25
25
100
125
V
CC
= 3V
V
REF
= 2.5V
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