LTC2420IS8#TRPBF Linear Technology, LTC2420IS8#TRPBF Datasheet - Page 4

• Manufacturer Part Number: LTC2420IS8#TRPBF
• Description: IC ADC 20BIT MICRPWR W/OSC 8SOIC
• Manufacturer: Linear Technology

Specifications of LTC2420IS8#TRPBF

• Number Of Bits: 20
• Sampling Rate (per Second): 7.5
• Data Interface: MICROWIRE™, Serial, SPI™
• Number Of Converters: 2
• Power Dissipation (max): 1mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LTC2420
TI I G CHARACTERISTICS
range, otherwise specifications are at T
SYMBOL
f
t
t
t
f
D
f
t
t
t
t
t
t2
t3
t4
t
t
Note 1: Absolute Maximum Ratings are those values beyond which the
life of the device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: All voltages are with respect to GND. V
otherwise specified. R
Note 4: Internal Conversion Clock source with the F
to GND or to V
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: F
(external oscillator).
Note 8: F
(external oscillator).
4
t
t
EOSC
HEO
LEO
CONV
ISCK
ESCK
LESCK
HESCK
DOUT_ISCK
DOUT_ESCK
1
KQMAX
KQMIN
EOSC
5
6
ISCK
W
= 153600Hz unless otherwise specified.
U
O
O
= 0V (internal oscillator) or f
= V
CC
CC
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
CS to SDO Low Z
CS to SDO High Z
CS to SCK
CS to SCK
SCK
SDO Hold After SCK
SCK Set-Up Before CS
SCK Hold After CS
(internal oscillator) or f
or to external conversion clock source with
SOURCE
to SDO Valid
= 0 .
EOSC
EOSC
A
= 153600Hz 2%
= 25 C. (Note 3)
= 128000Hz 2%
CC
= 2.7 to 5.5V unless
O
pin tied
The
CONDITIONS
20-Bit Effective Resolution
12-Bit Effective Resolution
F
F
External Oscillator (Note 11)
Internal Oscillator (Note 10)
External Oscillator (Notes 10, 11)
(Note 10)
(Note 9)
(Note 9)
(Note 9)
Internal Oscillator (Notes 10, 12)
External Oscillator (Notes 10, 11)
(Note 9)
(Note 10)
(Note 9)
(Note 5)
O
O
= 0V
= V
CC
denotes specifications which apply over the full operating temperature
Note 9: The converter is in external SCK mode of operation such that
the SCK pin is used as digital input. The frequency of the clock signal
driving SCK during the data output is f
Note 10: The converter is in internal SCK mode of operation such that
the SCK pin is used as digital output. In this mode of operation the
SCK pin has a total equivalent load capacitance C
Note 11: The external oscillator is connected to the F
oscillator frequency, f
Note 12: The converter uses the internal oscillator.
F
Note 13: The output noise includes the contribution of the internal
calibration operations.
Note 14: For reference voltage values V
of – 0.125 • V
rating of the Analog Input Voltage pin (Pin 3). For 2.5V < V
0.267V + 0.89 • V
For 0.267V + 0.89 • V
to V
Note 15: V
O
= 0V or F
CC
+ 0.3V.
CC
O
REF
(DC) = 4.1V, V
= V
to 1.125 • V
CC
CC
.
the input voltage range is – 0.3V to 1.125 • V
CC
EOSC
< V
, is expressed in kHz.
REF
CC
130.86
157.03
REF
MIN
2.56
2.56
1.23
250
250
0.2
0.2
45
50
15
50
(AC) = 2.8V
0
0
0
is limited by the absolute maximum
V
20510/f
CC
192/f
24/f
the input voltage range is – 0.3V
ESCK
REF
ESCK
EOSC
f
133.53
160.23
EOSC
EOSC
1.25
P-P
TYP
19.2
> 2.5V the extended input
and is expressed in kHz.
(in kHz)
.
(in kHz)
/8
(in kHz)
LOAD
136.20
163.44
O
307.2
2.048
2000
MAX
1.28
390
390
150
150
150
200
= 20pF.
pin. The external
55
50
REF
UNITS
REF
MHz
kHz
kHz
kHz
kHz
ms
ms
ms
ms
ms
ms
.
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
s
s