參數(shù)資料
型號: LTC2408IG
廠商: LINEAR TECHNOLOGY CORP
元件分類: ADC
英文描述: 4-/8-Channel 24-Bit uPower No Latency ADCs
中文描述: 8-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28
封裝: 0.209 INCH, PLASTIC, SSOP-28
文件頁數(shù): 10/36頁
文件大小: 351K
代理商: LTC2408IG
10
LTC2404/LTC2408
A high on this pin also disables the SDO digital output. A
low-to-high transition on CSADC during the Data Output
state aborts the data transfer and starts a new conversion.
For normal operation, drive this pin in parallel with CSMUX.
SDO (Pin 24):
Three-State Digital Output. During the data
output period this pin is used for serial data output. When
the chip select CSADC is high (CSADC = V
CC
), the SDO pin
is in a high impedance state. During the Conversion and
Sleep periods, this pin can be used as a conversion status
output. The conversion status can be observed by pulling
CSADC low.
SCK (Pin 25):
Shift Clock for Data Out. This clock synchro-
nizes the serial data transfer of the ADC data output. Data
FUU
W
TEST CIRCUITS
3.4k
SDO
24048 TC01
HI-Z TO V
OH
V
OL
TO V
V
OH
TO HI-Z
C
LOAD
= 20pF
3.4k
SDO
24048 TC02
HI-Z TO V
OL
V
OH
TO V
V
OL
TO HI-Z
C
LOAD
= 20pF
V
CC
PI
FU
CTIO
N
S
U
U
AUTOCALIBRATION
AND CONTROL
DECIMATING FIR
INTERNAL
OSCILLATOR
SERIAL
INTERFACE
CHANNEL
SELECT
ADC
DAC
GND
8
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
V
CC
SDO
SCK
V
REF
COM
CSADC
F
O
(INT/EXT)
24048 BD
CSMUX
D
IN
CLK
is shifted out of SDO on the falling edge of SCK. For normal
operation, drive this pin in parallel with CLK.
F
O
(Pin 26):
Digital input which controls the ADC’s notch
frequencies and conversion time. When the F
O
pin is
connected to V
CC
(F
O
= V
CC
), the converter uses its internal
oscillator and the digital filter first null is located at 50Hz.
When the F
O
pin is connected to GND (F
O
= OV), the
converter uses its internal oscillator and the digital filter
first null is located at 60Hz. When F
O
is driven by an
external clock signal with a frequency f
EOSC
, the converter
uses this signal as its clock and the digital filter first null is
located at a frequency f
EOSC
/2560. The resulting output
word rate is f
EOSC
/20480.
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