LTC2485 LINER [Linear Technology], LTC2485 Datasheet - Page 5

• Manufacturer Part Number: LTC2485
• Description: 24-Bit ?? ADC with Easy Drive Input Current Cancellation and I2C Interface
• Manufacturer: LINER [Linear Technology]

temperature range, otherwise specifications are at T
TI I G CHARACTERISTICS
range, otherwise specifications are at T
SYMBOL
f
t
t
t
t
SYMBOL
f
t
t
t
t
t
t
t
t
t
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.
Note 3: V
Note 4: Use internal conversion clock or external conversion clock source
with f
Note 5: Guaranteed by design, not subject to test.
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.
I
EOSC
HEO
LEO
CONV_1
CONV_2
SCL
HD(SDA)
LOW
HIGH
SU(STA)
HD(DAT)
SU(DAT)
r
f
SU(STO)
2
V
V
W U
C TI I G CHARACTERISTICS
REF
IN
EOSC
= IN
= REF
CC
= 307.2kHz unless otherwise specified.
W
+
= 2.7V to 5.5V unless otherwise specified.
– IN
+
– REF
–
PARAMETER
External Oscillator Frequency Range
External Oscillator High Period
External Oscillator Low Period
Conversion Time for 1x Speed Mode
Conversion Time for 2x Speed Mode
U
PARAMETER
SCL Clock Frequency
Hold Time (Repeated) START Condition
LOW Period of the SCL Clock Pin
HIGH Period of the SCL Clock Pin
Set-Up Time for a Repeated START Condition
Data Hold Time
Data Set-Up Time
Rise Time for Both SDA and SCL Signals
Fall Time for Both SDA and SCL Signals
Set-Up Time for STOP Condition
, V
INCM
–
, V
REFCM
= (IN
+
= (REF
+ IN
–
)/2.
+
+ REF
A
–
= 25°C. (Note 3)
)/2, FS = 0.5V
The
A
REF
= 25°C. (Notes 3, 15)
;
●
CONDITIONS
50Hz Mode
60Hz Mode
Simultaneous 50Hz/60Hz Mode
External Oscillator (Note 10)
50Hz Mode
60Hz Mode
Simultaneous 50Hz/60Hz Mode
External Oscillator (Note 10)
CONDITIONS
(Note 14)
(Note 14)
The
denotes the specifications which apply over the full operating temperature
●
denotes the specifications which apply over the full operating
Note 7: 50Hz mode (internal oscillator) or f
oscillator).
Note 8: 60Hz mode (internal oscillator) or f
oscillator).
Note 9: Simultaneous 50Hz/60Hz mode (internal oscillator) or f
280kHz ±2% (external oscillator).
Note 10: The external oscillator is connected to the CA0/F
external oscillator frequency, f
Note 11: The converter uses the internal oscillator.
Note 12: The output noise includes the contribution of the internal
calibration operations.
Note 13: Guaranteed by design and test correlation.
Note 14: C
Note 15: All values refer to V
B
= capacitance of one bus line in pF.
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
IH(MIN)
20+0.1C
20+0.1C
EOSC
0.125
0.125
157.2
131.0
144.1
MIN
78.7
65.6
72.2
MIN
100
0.6
1.3
0.6
0.6
0.6
10
0
0
, is expressed in kHz.
and V
B
B
41036/f
20556/f
IL(MAX)
EOSC
EOSC
160.3
133.6
146.9
80.3
66.9
73.6
TYP
TYP
= 256kHz ±2% (external
= 307.2kHz ±2% (external
EOSC
EOSC
levels.
LTC2485
163.5
136.3
149.9
4000
MAX
MAX
81.9
68.2
75.1
100
100
400
300
300
0.9
0
pin. The
EOSC
UNITS
UNITS
=
2485fa
5
kHz
kHz
ms
ms
ms
ms
ms
ms
ms
ms
µs
µs
µs
µs
µs
µs
µs
ns
ns
ns
µs