ltc2493 Linear Technology Corporation, ltc2493 Datasheet - Page 5

• Manufacturer Part Number: ltc2493
• Description: 24-bit 2-/4-channel Delta Sigma Adc With Easy Drive Input Current Cancellation And I2c Interface
• Manufacturer: Linear Technology Corporation

DigiTal inpuTs anD DigiTal ouTpuTs
full operating temperature range, otherwise specifications are at T
SYMBOL
f
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: Unless otherwise specified: V
where IN
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.
power requireMenTs
i
SYMBOL
f
t
t
t
t
t
t
t
t
t
temperature range, otherwise specifications are at T
range, otherwise specifications are at T
SYMBOL
V
I
EOSC
HEO
LEO
CONV_1
CONV_2
SCL
HD(STA)
LOW
HIGH
SU(STA)
HD(DAT)
SU(DAT)
SU(STO)
CC
r
f
2
CC
V
V
c TiMing characTerisTics
REFCM
IN
EOSC
= IN
+
and IN
= 307.2kHz unless otherwise specified.
= V
+
– IN
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
PARAMETER
SCL Clock Frequency
Hold Time (Repeated) Start Condition
Low Period of the SCL Pin
High Period of the SCL Pin
Set-Up Time for a Repeated Start Condition
Data Hold Time
Data Set-Up Time
Rise Time for SDA Signals
Fall Time for SDA Signals
Set-Up Time for Stop Condition
REF
PARAMETER
Supply Voltage
Supply Current
–
–
/2, F
, V
are the selected input channels.
IN(CM)
S
= 0.5V
= (IN
REF
+
– IN
CC
–
)/2,
= 2.7V to 5.5V
A
CONDITIONS
Conversion Current (Note 11)
Temperature Measurement (Note 11)
Sleep Mode (Note 11)
= 25°C. (Note 3)
The
CONDITIONS
(Note 16)
50Hz Mode
60Hz Mode
Simultaneous 50Hz/60Hz Mode
External Oscillator (Note 10)
50Hz Mode
60Hz Mode
Simultaneous 50Hz/60Hz Mode
External Oscillator (Note 10)
A
●
= 25°C. (Note 3, 15)
denotes the specifications which apply over the full operating temperature
CONDITIONS
(Note 14)
(Note 14)
The
●
denotes the specifications which apply over the full operating
A
= 25°C. (Note 3)
Note 7: 50Hz mode (internal oscillator) or f
Note 8: 60Hz mode (internal oscillator) or f
Note 9: Simultaneous 50Hz/60Hz mode (internal oscillator) or f
280kHz ±2% (external oscillator).
Note 10: The external oscillator is connected to the F
oscillator frequency, f
Note 11: The converter uses its 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
Note 16: Refer to Applications Information section for Performance vs
Data Rate graphs.
The
B
= capacitance of one bus line in pF (10pF ≤ C
●
denotes the specifications which apply over the
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
EOSC
●
●
●
●
0.125
0.125
157.2
144.1
20 + 0.1C
20 + 0.1C
MIN
78.7
65.6
72.2
131
, is expressed in kHz.
10
MIN
100
0.6
1.3
0.6
0.6
0.6
IH(MIN)
0
0
MIN
2.7
41036/f
20556/f
B
B
and V
EOSC
EOSC
160.3
133.6
146.9
EOSC
EOSC
IL(MAX)
80.3
66.9
73.6
= 307.2kHz ±2% (external oscillator).
TYP
= 256kHz ±2% (external oscillator).
TYP
160
200
TYP
1
(in kHz)
(in kHz)
levels.
LTC2493
O
pin. The external
MAX
275
300
5.5
2
B
163.5
136.3
149.9
4000
MAX
MAX
81.9
68.2
75.1
400
300
300
≤ 400pF).
0.9
50
50
EOSC
=
UNITS
UNITS
UNITS
2493fa

kHz
kHz
ms
ms
ms
ms
ms
ms
ms
ms
µs
µs
µA
µA
µA
µs
µs
µs
µs
µs
ns
ns
ns
µs
V