Datasheet

LTC2309
5
2309fd
I
2
C tIMInG CHARACteRIstICs
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
SCL
SCL Clock Frequency
l
400 kHz
t
HD(SDA)
Hold Time (Repeated) START Condition
l
0.6 µs
t
LOW
LOW Period of the SCL Pin
l
1.3 µs
t
HIGH
HIGH Period of the SCL Pin
l
0.6 µs
t
SU(STA)
Set-Up Time for a Repeated START Condition
l
0.6 µs
t
HD(DAT)
Data Hold Time
l
0 0.9 µs
t
SU(DAT)
Data Set-Up Time
l
100 ns
t
r
Rise Time for SDA/SCL Signals (Note 12)
l
20 + 0.1C
B
300 ns
t
f
Fall Time for SDA/SCL Signals (Note 12)
l
20 + 0.1C
B
300 ns
t
SU(STO)
Set-Up Time for STOP Condition
l
0.6 µs
t
BUF
Bus Free Time Between a STOP and START Condition
l
1.3 µs
ADC tIMInG CHARACteRIstICs
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
SMPL
Throughput Rate (Successive Reads)
l
14 ksps
t
CONV
Conversion Time (Note 9)
l
1.3 1.8 µs
t
ACQ
Acquisition Time (Note 9)
l
240 ns
t
REFWAKE
REFCOMP Wake-Up Time (Note 13) C
REFCOMP
= 10µF, C
REF
= 2.2µF 200 ms
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 ground.
Note 3: When these pin voltages are taken below ground or above V
DD
,
they will be clamped by internal diodes. These products can handle input
currents greater than 100mA below ground or above V
DD
without latchup.
Note 4: V
DD
= 5V, f
SMPL
= 14ksps internal reference unless otherwise
noted.
Note 5: Linearity, offset and full-scale specifications apply for a
single-ended analog input with respect to COM.
Note 6: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 7: Bipolar zero error is the offset voltage measured from –0.5LSB
when the output code flickers between 0000 0000 0000 and 1111 1111
1111. Unipolar zero error is the offset voltage measured from +0.5LSB
when the output code flickers between 0000 0000 0000 and 0000 0000
0001.
Note 8: Full-scale bipolar error is the worst-case of –FS or +FS untrimmed
deviation from ideal first and last code transitions and includes the effect
of offset error. Unipolar full-scale error is the deviation of the last code
transition from ideal and includes the effect of offset error.
Note 9: Guaranteed by design, not subject to test.
Note 10: All specifications in dB are referred to a full-scale ±2.048V input
with a 2.5V reference voltage.
Note 11: Full linear bandwidth is defined as the full-scale input frequency
at which the SINAD degrades to 60dB or 10 bits of accuracy.
Note 12: C
B
= capacitance of one bus line in pF (10pF ≤ C
B
≤ 400pF).
Note 13: REFCOMP wake-up time is the time required for the REFCOMP
pin to settle within 0.5LSB at 12-bit resolution of its final value after
waking up from SLEEP mode.