LTC1288CS8 Linear Technology, LTC1288CS8 Datasheet - Page 4

• Manufacturer Part Number: LTC1288CS8
• Description: IC A/D CONV SAMPLING 12BIT 8SOIC
• Manufacturer: Linear Technology

Specifications of LTC1288CS8

• Number Of Bits: 12
• Sampling Rate (per Second): 6.6k
• Data Interface: MICROWIRE™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 630µW
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LTC1285/LTC1288
AC CHARACTERISTICS
TYPICAL PERFORMANCE CHARACTERISTICS
SYMBOL
t
f
t
t
t
t
t
t
t
C
The
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 3V. For 5V specified devices, see
LTC1286 and LTC1298.
Note 4: Increased leakage currents at elevated temperatures cause the
sample-and-hold to droop, therefore it is recommended that f
at 70 and f
Note 5: V
specified.
Note 6: Linearity error is specified between the actual end points of the
A/D transfer curve.
4
SMPL
SMPL (MAX)
CONV
dDO
dis
en
hDO
f
r
IN
1000
100
10
1
0.1
Supply Current vs Sample Rate
denotes specifications which apply over the full operating
T
V
V
f
CLK
A
CC
REF
CC
= 25°C
CLK
= 2.7V
= 120kHz
= 2.7V, V
= 2.5V
PARAMETER
Analog Input Sample Time
Maximum Sampling Frequency
Conversion Time
Delay Time, CLK to D
Delay Time, CS to D
Delay Time, CLK to D
Time Output Data Remains Valid After CLK
D
D
Input Capacitance
OUT
OUT
1kHz at 25 C.
SAMPLE RATE (kHz)
Fall Time
Rise Time
REF
= 2.5V and CLK = 120kHz unless otherwise
LTC1285
1
LTC1288
LTC1285/88 • TPC01
OUT
OUT
OUT
W
Hi-Z
Data Valid
Enable
10
U
(Note 5)
250
200
150
100
50
0
–55
Supply Current vs Temperature
CLK
V
V
f
CLK
–35
CC
REF
CONDITIONS
See Operating Sequence
LTC1285
LTC1288
See Operating Sequence
See Test Circuits
See Test Circuits
See Test Circuits
C
See Test Circuits
See Test Circuits
Analog Inputs, On Channel
Analog Inputs, Off Channel
Digital Input
LOAD
= 2.7V
= 120kHz
= 2.5V
75kHz
–15
= 100pF
TEMPERATURE (°C)
5
25
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
bias of either diode for 2.7V V
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 2.7V
input voltage range will therefore require a minimum supply voltage of
2.650V over initial tolerance, temperature variations and loading. For 2.7V
< V
reference and analog input range are greater than 6.05V, the output code
will not be guaranteed to be correct.
Note 8: The supply voltage range for the LTC1285 and the LTC1288 is
from 2.7V to 6V.
Note 9: Recommended operating conditions
Note 10: Channel leakage current is measured after the channel selection.
45
CC
f
f
SMPL
SMPL
65
LTC1288
LTC1285
6V, reference and analog input range cannot exceed 6.05V. If
85
LTC1285/88 • TPC02
= 6.6kHz
= 7.5kHz
105
125
0.002
9
7
6
5
3
0
CC
8
4
2
1
1
Shutdown Supply Current vs Clock
Rate with CS High and CS Low
MIN
T
V
V
7.5
6.6
A
CC
REF
6V. This means that as long as the
= 25°C
CC
= 2.7V
20
= 2.5V
. This spec allows 50mV forward
TYP
600
220
180
520
1.5
12
60
80
20
5
5
FREQUENCY (kHz)
40
CS = 0
(AFTER CONVERSION)
CS = V
60
1500
MAX
660
500
180
180
CC
80
LTC1285/88 • TPC03
CLK Cycles
CLK Cycles
100
UNITS
kHz
kHz
120
ns
ns
ns
ns
ns
ns
pF
pF
pF