ltc1598l Linear Technology Corporation, ltc1598l Datasheet - Page 4

• Manufacturer Part Number: ltc1598l
• Description: 4- And 8-channel, 3v Micropower Sampling 12-bit Serial I/o A/d Converters
• Manufacturer: Linear Technology Corporation

AC CHARACTERISTICS
otherwise specifications are at T
LTC1594L/LTC1598L
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. Consult factory for 5V
specified devices (LTC1594/LTC1598).
Note 4: Increased leakage currents at elevated temperatures cause the S/H
to droop, therefore it is recommended that f
f
Note 5: V
specified. CSADC and CSMUX pins are tied together during the test.
Note 6: Linearity error is specified between the actual end points of the
A/D transfer curve.
TYPICAL PERFORMANCE CHARACTERISTICS
SYMBOL
t
f
t
t
t
t
t
t
t
t
t
t
C
4
CLK
SMPL
SMPL(MAX)
CONV
dDO
dis
en
hDO
f
r
ON
OFF
OPEN
IN
1000
100
10
1
0.1
75kHz at 70 C and f
Supply Current vs Sample Rate
T
V
V
f
CLK
A
CC
CC
REF
= 25 C
= 2.7V
= 200kHz
= 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
Enable Turn-On Time
Enable Turn-Off Time
Break-Before-Make Interval
Input Capacitance
SAMPLE FREQUENCY (kHz)
OUT
OUT
1
Fall Time
Rise Time
REF
= 2.5V and CLK = 200kHz unless otherwise
CLK
10
1kHz at 25 C.
OUT
W
OUT
OUT
A
1594L/98L G01
= 25 C.(Note 5)
Hi-Z
Data Valid
Enabled
CLK
U
100
The
200kHz at 85 C,
denotes the specifications which apply over the full operating temperature range,
220
140
260
180
100
60
– 55
Supply Current vs Temperature
T
V
V
f
f
CLK
SMPL
A
CC
REF
– 35
CONDITIONS
See Figure 1 in Applications Information
See Figure 1 in Applications Information
See Figure 1 in Applications Information
See Test Circuits
See Test Circuits
See Test Circuits
C
See Test Circuits
See Test Circuits
See Figure 1 in Applications Information
See Figure 2 in Applications Information
Analog Inputs On-Channel
Digital Input
= 25 C
LOAD
= 2.7V
= 200kHz
= 2.5V
= 10.5kHz
–15
= 100pF
TEMPERATURE ( C)
5
25
Off-Channel
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 3V
input voltage range, it will therefore require a minimum supply voltage of
2.950V over initial tolerance, temperature variations and loading.
Note 8: Recommended operating condition.
Note 9: Channel leakage current is measured after the channel selection.
45
65
85 105
1594L/98L G02
125
49
43
53
52
51
50
48
47
46
45
44
CC
–55
Reference Current vs Temperature
V
MIN
10.5
V
f
f
125
1.5
CLK
SMPL
CC
REF
–35
3.6V. This means that as long as the
CC
= 2.7V
= 200kHz
= 2.5V
. This spec allows 50mV forward
= 10.5kHz
–15
TEMPERATURE ( C)
TYP
600
220
180
520
540
190
350
5
12
60
80
20
5
5
25
1500
1200
45
MAX
600
500
180
180
500
65
85 105
CLK Cycles
CLK Cycles
1594L/98L G03
15948lfb
UNITS
kHz
125
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
pF
pF