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LTC1293BI Datasheet(PDF) 4 Page - Linear Technology

Part # LTC1293BI
Description  Single Chip 12-Bit Data Acquisition System
Download  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1293BI Datasheet(HTML) 4 Page - Linear Technology

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4
LTC1293/LTC1294/LTC1296
SYMBOL
PARAMETER
CONDITIONS
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, IO = –10mA
4.7
V
IO = 360µA
q
2.4
4.0
VOL
Low Level Output Voltage
VCC = 4.75V, IO = 1.6mA
q
0.4
V
IOZ
High Z Output Leakage
VOUT = VCC, CS High
q
3
µA
VOUT = 0V, CS High
q
–3
ISOURCE
Output Source Current
VOUT = 0V
–20
mA
ISINK
Output Sink Current
VOUT = VCC
20
mA
ICC
Positive Supply Current
CS High
q
612
mA
ICC
Positive Supply Current
CS High,
LTC1294BC, LTC1294CC,
q
510
µA
Power
LTC1294DC, LTC1294BI,
Shutdown
LTC1294CI, LTC1294DI,
CLK Off
LTC1294BM, LTC1294CM,
q
515
µA
LTC1294DM
IREF
Reference Current
CS High
q
10
50
µA
I
Negative Supply Current
CS High
q
150
µA
ISOURCEs
SSO Source Current
VSSO = 0V
q
0.8
1.5
mA
ISINKs
SSO Sink Current
VSSO = VCC
q
0.5
1.0
mA
ELECTRICAL C
C
HARA TER STICS
DIGITAL A D
I
DC
(Note 3)
LTC1293/4/6B
LTC1293/4/6C
LTC1293/4/6D
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 DGND, AGND and REF
wired
together (unless otherwise noted).
Note 3: VCC = 5V, VREF+ = 5V, VREF– = 0V, V
= 0V for unipolar mode and
–5V for bipolar mode, CLK = 1.0MHz unless otherwise specified. The q
denotes specifications which apply over the full operating temperature
range; all other limits and typicals TA = 25
°C.
Note 4: These specs apply for both unipolar and bipolar modes. In bipolar
mode, one LSB is equal to the bipolar input span (2VREF) divided by 4096.
For example, when VREF = 5V, 1LSB (bipolar) = 2 (5V)/4096 = 2.44mV.
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 reference and analog input
which will conduct for reference or analog input voltages one diode drop
below V
or one diode drop above VCC. Be careful during testing at low
VCC levels (4.5V), as high level reference or analog inputs (5V) 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. To achieve an absolute 0V to 5V input voltage range will
therefore require a minimum supply voltage of 4.950V over initial
tolerance, temperature variations and loading.
Note 8: Channel leakage current is measured after the channel selection.


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