ltc2484 Linear Technology Corporation, ltc2484 Datasheet - Page 5

• Manufacturer Part Number: ltc2484
• Description: 24-bit Delta Sigma Adc With Easy Drive Input Current Cancellation
• Manufacturer: Linear Technology Corporation

TI I G CHARACTERISTICS
range, otherwise specifications are at T
SYMBOL
f
t
t
t
t
f
D
f
t
t
t
t
t
t2
t3
t4
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.
Note 7: 50Hz mode (internal oscillator) or f
oscillator).
EOSC
HEO
LEO
CONV_1
CONV_2
ISCK
ESCK
LESCK
HESCK
DOUT_ISCK
DOUT_ESCK
1
KQMAX
KQMIN
t
t
7
8
5
6
ISCK
V
V
W U
REFCM
IN
EOSC
= IN
CC
= 307.2kHz unless otherwise specified.
= V
+
= 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
Internal SCK Frequency
Internal SCK Duty Cycle
External SCK Frequency Range
External SCK Low Period
External SCK High Period
Internal SCK 32-Bit Data Output Time
External SCK 32-Bit Data Output Time
CS↓ to SDO Low
CS↑ to SDO High Z
CS↓ to SCK↓
CS↓ to SCK↑
SCK↓ to SDO Valid
SDO Hold After SCK↓
SCK Set-Up Before CS↓
SCK Hold After CS↓
SDI Setup Before SCK↑
SDI Hold After SCK↑
/2, FS = 0.5V
, V
IN(CM)
= (IN
REF
+
+ IN
–
)/2
EOSC
A
= 25°C. (Note 3)
= 256kHz ±2% (external
The
CONDITIONS
(Note 15)
50Hz Mode
60Hz Mode
Simultaneous 50Hz/60Hz Mode
External Oscillator
50Hz Mode
60Hz Mode
Simultaneous 50Hz/60Hz Mode
External Oscillator
Internal Oscillator (Note 10)
External Oscillator (Notes 10, 11)
(Note 10)
(Note 10)
(Note 10)
(Note 10)
Internal Oscillator (Notes 10, 12)
External Oscillator (Notes 10, 11)
(Note 10)
(Note 10)
(Note 10)
(Note 5)
(Note 5)
(Note 5)
●
denotes specifications which apply over the full operating temperature
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 SCK can be configured in external SCK mode or internal SCK
mode. In external SCK mode, the SCK pin is used as digital input and the
driving clock is f
output and the output clock signal during the data output is f
Note 11: The external oscillator is connected to the F
oscillator frequency, f
Note 12: The converter uses the internal oscillator.
Note 13: The output noise includes the contribution of the internal
calibration operations.
Note 14: Guaranteed by design and test correlation.
Note 15: Refer to Applications Information section for performance vs
data rate graphs.
ESCK
. In internal SCK mode, the SCK pin is used as digital
EOSC
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
, is expressed in kHz.
0.125
0.125
157.2
131.0
144.1
78.7
65.6
72.2
0.81
MIN
125
125
100
100
10
45
50
15
50
0
0
0
41036/f
20556/f
256/f
32/f
ESCK
EOSC
EOSC
f
160.3
133.6
146.9
EOSC
EOSC
EOSC
80.3
66.9
73.6
38.4
0.83
TYP
(in kHz)
= 307.2kHz ±2% (external
(in kHz)
/8
(in kHz)
(in kHz)
O
LTC2484
pin. The external
163.5
136.3
149.9
4000
4000
MAX
81.9
68.2
75.1
0.85
100
100
200
200
200
200
55
50
ISCK
EOSC
.
UNITS
=
2484fa
5
kHz
kHz
kHz
kHz
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%