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參數(shù)資料
| 型號： | LTC1289CIN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 3 Volt Single Chip 12-Bit Data Acquisition System |
| 中文描述： | 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 4/28頁 |
| 文件大?。?/td> | 487K |
| 代理商： | LTC1289CIN |
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4
LTC1289
LTC1289B
LTC1289C
TYP
SYMBOL
V
IH
V
IL
I
IH
I
IL
V
OH
PARAMETER
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
High Level Output Voltage
CONDITIONS
V
CC
= 3.6V
V
CC
= 3.0V
V
IN
= V
CC
V
IN
= 0V
V
CC
= 3.0V
I
O
= 20
μ
A
I
O
= 400
μ
A
V
CC
= 3.0V
I
O
= 20
μ
A
I
O
= 400
μ
A
V
OUT
= V
CC
, CS High
V
OUT
= 0V, CS High
V
OUT
= 0V
V
OUT
= V
CC
CS High
CS High, Power Shutdown, ACLK Off
V
REF
= 2.5V
CS High
MIN
2.1
MAX
UNITS
G
V
V
G
0.45
2.5
–2.5
G
μ
A
μ
A
V
G
G
2.90
2.85
2.7
V
OL
Low Level Output Voltage
V
G
0.05
0.10
0.3
3
–3
I
OZ
High Z Output Leakage
G
G
μ
A
μ
A
mA
mA
mA
μ
A
μ
A
μ
A
I
SOURCE
I
SINK
I
CC
Output Source Current
Output Sink Current
Positive Supply Current
–10
9
1.5
1.0
10
1
G
G
5
10
50
50
I
REF
I
–
Reference Current
Negative Supply Current
G
G
ELECTRICAL C
HARA TER STICS
DIGITAL A D
U
DC
(Note 3)
inputs 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:
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 set-up time has elasped. See Typical Peformance
Characteristics curves for additional information (t
suCS
vs V
CC
).
Note 10:
Increased leakage currents at elevated temperatures cause the
S/H to droop, therefore it's recommended that f
ACLK
≥
125kHz at 85
°
C and
f
ACLK
≥
15kHz at 25
°
C.
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 impared.
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 = 2.0MHz unless otherwise specified.
Note 4:
These specs apply for both unipolar and bipolar modes. In bipolar
mode, one LSB is equal to the bipolar input span (2V
REF
) divided by 4096.
For example, when V
REF
= 2.5V, 1LSB(bipolar) = 2(2.5)/4096 = 1.22mV.
V
–
= –2.7V for bipolar mode.
Note 5:
Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the 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 V
CC
. Be careful during testing at low V
CC
levels, as high level analog
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