LTC1294 LINER [Linear Technology], LTC1294 Datasheet - Page 4

• Manufacturer Part Number: LTC1294
• Description: Single Chip 12-Bit Data Acquisition System
• Manufacturer: LINER [Linear Technology]

LTC1293/LTC1294/LTC1296
DIGITAL A D
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
together (unless otherwise noted).
Note 3: V
–5V for bipolar mode, CLK = 1.0MHz unless otherwise specified. The
denotes specifications which apply over the full operating temperature
range; all other limits and typicals T
Note 4: These specs apply for both unipolar and bipolar modes. In bipolar
mode, one LSB is equal to the bipolar input span (2V
For example, when V
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.
4
SYMBOL
V
V
I
I
V
V
I
I
I
I
I
I
I
I
I
IH
IL
OZ
SOURCE
SINK
CC
CC
REF
SOURCEs
SINKs
–
IH
IL
OH
OL
CC
= 5V, V
PARAMETER
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
High Level Output Voltage
Low Level Output Voltage
High Z Output Leakage
Output Source Current
Output Sink Current
Positive Supply Current
Positive Supply Current
Reference Current
Negative Supply Current
SSO Source Current
SSO Sink Current
REF +
REF
U
= 5V, V
= 5V, 1LSB (bipolar) = 2 (5V)/4096 = 2.44mV.
REF –
DC
A
= 0V, V
= 25 C.
ELECTRICAL C
–
= 0V for unipolar mode and
REF
CONDITIONS
V
V
V
V
V
V
V
V
V
V
CS High
CS High,
Power
Shutdown
CLK Off
CS High
CS High
V
V
CC
CC
IN
IN
CC
CC
OUT =
OUT
OUT
OUT
SSO
SSO
) divided by 4096.
= V
= 0V
= 5.25V
= 4.75V
= 4.75V, I
= 4.75V, I
= 0V, CS High
= 0V
= V
= 0V
= V
V
CC
CC
CC
CC
, CS High
I
O
O
–
O
HARA TER STICS
wired
= –10mA
= 1.6mA
= 360 A
LTC1294BC, LTC1294CC,
LTC1294DC, LTC1294BI,
LTC1294CI, LTC1294DI,
LTC1294BM, LTC1294CM,
LTC1294DM
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
V
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.
C
CC
levels (4.5V), as high level reference or analog inputs (5V) can cause
–
or one diode drop above V
I
(Note 3)
MIN
2.0
2.4
0.8
0.5
CC
LTC1293/4/6B
LTC1293/4/6C
LTC1293/4/6D
. Be careful during testing at low
TYP
–20
4.7
4.0
1.5
1.0
20
10
6
5
5
1
MAX
–2.5
0.8
2.5
0.4
–3
12
10
15
50
50
3
UNITS
mA
mA
mA
mA
mA
V
V
A
A
V
V
A
A
A
A
A