LTC2488 LINER [Linear Technology], LTC2488 Datasheet - Page 5

• Manufacturer Part Number: LTC2488
• Description: 16-Bit 2-/4-Channel ?? ADC with Easy Drive Input Current Cancellation
• Manufacturer: LINER [Linear Technology]

DIGITAL INPUTS AND DIGITAL OUTPUTS
full operating temperature range, otherwise specifi cations are at T
SYMBOL
f
t
t
t
f
D
f
t
t
t
t
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: Unless otherwise specifi ed:
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 defi ned 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: f
Note 8: f
EOSC
HEO
LEO
CONV
ISCK
ESCK
LESCK
HESCK
DOUT_ISCK
DOUT_ESCK
1
2
3
4
KQMAX
KQMIN
5
7
8
ISCK
V
V
V
CC
REFCM
IN
EOSC
= IN
= 2.7V to 5.5V
EOSC
EOSC
+
and IN
= 307.2kHz unless other wise specifi ed.
= V
+
– IN
= 256kHz ±2% (external oscillator).
= 307.2kHz ±2% (external oscillator).
PARAMETER
External Oscillator Frequency Range
External Oscillator High Period
External Oscillator Low Period
Conversion Time
Internal SCK Frequency
Internal SCK Duty Cycle
External SCK Frequency Range
External SCK Low Period
External SCK High Period
Internal SCK 24-Bit Data Output Time
External SCK 24-Bit Data Output Time
⎯ C ⎯ S ↓ to SDO Low
⎯ C ⎯ S ↑ to SDO High Z
⎯ C ⎯ S ↓ to SCK↓
⎯ C ⎯ S ↓ to SCK↑
SCK↓ to SDO Valid
SDO Hold After SCK↓
SCK Set-Up Before ⎯ C ⎯ S ↓
SDI Setup Before SCK↑
SDI Hold After SCK↑
REF
–
–
/2, F
, V
are the selected input channels.
IN(CM)
S
= 0.5V
= (IN
REF
+
– IN
–
)/2,
CONDITIONS
(Note 16)
Simultaneous 50Hz/60Hz
External Oscillator
Internal Oscillator (Notes 10, 17)
External Oscillator (Notes 10, 11, 15)
(Notes 10, 17)
(Notes 10, 11, 15)
(Notes 10, 11, 15)
(Notes 10, 11, 15)
Internal Oscillator (Notes 10, 17)
External Oscillator (Notes 10, 11, 15)
Internal SCK Mode
External SCK Mode
(Note 5)
(Note 5)
(Note 5)
A
= 25°C. (Note 3)
Note 9: Simultaneous 50Hz/60Hz (internal oscillator) or f
±2% (external oscillator).
Note 10: The SCK can be confi gured in external SCK mode or internal SCK
mode. In external SCK mode, the SCK pin is used as a digital input and the
driving clock is f
digital 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 its internal oscillator.
Note 13: The output noise includes the contribution of the internal
calibration operations. V
Note 14: Guaranteed by design and test correlation.
Note 15: The converter is in external SCK mode of operation such that the
SCK pin is used as a digital input. The frequency of the clock signal driving
SCK during the data output is f
Note 16: Refer to Applications Information section for performance vs
data rate graphs.
Note 17: The converter in internal SCK mode of operation such that the
SCK pin is used as a digital output.
The
●
ESCK
denotes the specifi cations which apply over the
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
. In the internal SCK mode, the SCK pin is used as a
EOSC
REF
0.125
0.125
144.1
MIN
0.61
125
125
100
100
, is expressed in kHz.
10
45
50
15
50
0
0
0
≤ V
ESCK
CC
41036/f
.
192/f
24/f
and is expressed in Hz.
ESCK
EOSC
f
146.9
EOSC
0.625
EOSC
38.4
TYP
(in kHz)
(in kHz)
/8
(in kHz)
LTC2488
O
pin. The external
EOSC
149.9
4000
4000
MAX
0.64
100
100
200
200
200
200
55
= 280kHz
ISCK
UNITS
5
2488f
kHz
kHz
kHz
kHz
.
ms
ms
ms
ms
ms
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%