Datasheet

LTC1863L/LTC1867L
4
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DIGITAL INPUTS AND DIGITAL OUTPUTS
The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)
SYMBOL PARAMETER CONDITIONS
LTC1863L/LTC1867L/LTC1867LA
UNITSMIN TYP MAX
I
IN
Digital Input Current V
IN
= 0V to V
DD
l
±10 µA
C
IN
Digital Input Capacitance 2 pF
V
OH
High Level Output Voltage (SDO) V
DD
= 2.7V, I
O
= –10µA
V
DD
= 2.7V, I
O
= –200µA
l
23
2.68
2.65
V
V
V
OL
Low Level Output Voltage (SDO) V
DD
= 2.7V, I
O
= 160µA
V
DD
= 2.7V, I
O
= 1.6µA
l
0.05
0.15 0.4
V
V
I
SOURCE
Output Source Current SDO = 0V –9.7 mA
I
SINK
Output Sink Current SDO = V
DD
6 mA
Hi-Z Output Leakage
Hi-Z Output Capacitance
CS/CONV = High, SDO = 0V or V
DD
CS/CONV = High (Note 10)
l
l
±10
15
µA
pF
Data Format Unipolar
Bipolar
Straight Binary
Tw
o ’s Complement
POWER REQUIREMENTS
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 5)
SYMBOL PARAMETER CONDITIONS
LTC1863L/LTC1867L/LTC1867LA
UNITSMIN TYP MAX
V
DD
Supply Voltage (Note 9) 2.7 3.6 V
I
DD
Supply Current f
SAMPLE
= 175ksps, Internal REF
NAP Mode
SLEEP Mode
l
l
0.75
170
0.2
1
3
mA
µA
µA
P
DISS
Power Dissipation f
SAMPLE
= 175ksps
l
2 2.7 mW
TIMING CHARACTERISTICS
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 5)
SYMBOL PARAMETER CONDITIONS
LTC1863L/LTC1867L/LTC1867LA
UNITSMIN TYP MAX
f
SAMPLE
Maximum Sampling Frequency
l
175 kHz
t
CONV
Conversion Time
l
3.2 3.7 µs
t
ACQ
Acquisition Time
l
2.01 1.68 µs
f
SCK
SCK Frequency 20 MHz
t
1
CS/CONV High Time Short CS/CONV Pulse Mode
l
40 100 ns
t
2
SDO Valid After SCK↓ C
L
= 25pF (Note 11)
l
22 47 ns
t
3
SDO Valid Hold Time After SCK↓ C
L
= 25pF
l
5 17 ns
t
4
SDO Valid After CS/CONV↓ C
L
= 25pF
l
20 40 ns
t
5
SDI Setup Time Before SCK↑
l
15 –6 ns
t
6
SDI Hold Time After SCK↑
l
15 6 ns
t
7
SLEEP Mode Wake-Up Time C
REFCOMP
= 10µF, C
VREF
= 2.2µF 80 ms
t
8
Bus Relinquish Time After CS/CONV↑ C
L
= 25pF
l
30 50 ns
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All voltage values are with respect to GND (unless otherwise
noted).
Note 3: When these pin voltages are taken below GND or above V
DD
, they
will be clamped by internal diodes. This product can handle input currents
up to 100mA without latchup.
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