參數(shù)資料
型號(hào)： LTC2439-1
廠商： Linear Technology Corporation
元件分類： ADC
英文描述： 8-/16-Channel 16-Bit No Latency Delta-Sigma ADC
中文描述： 8-/16-Channel 16位無(wú)延遲增量累加模數(shù)轉(zhuǎn)換器
文件頁(yè)數(shù)： 6/28頁(yè)
文件大小： 288K
代理商： LTC2439-1
LTC2439-1
6
24391f
CH0 to CH15 (Pin 21 to Pin 28 and Pin 1 to Pin 8):
Analog
Inputs. May be programmed for single-ended or differen-
tial mode.
V
CC
(Pin 9):
Positive Supply Voltage. Bypass to GND
(Pin15) with a 10
μ
F tantalum capacitor in parallel with
0.1
μ
F ceramic capacitor as close to the part as possible.
COM (Pin 10):
The common negative input (IN
–
) for all
single-ended multiplexer configurations. The voltage on
Channel 0 to 15 and COM input pins can have any value
between GND – 0.3V and V
CC
+ 0.3V. Within these limits,
the two selected inputs (IN
+
and IN
–
) provide a bipolar
input range (V
IN
= IN
+
– IN
–
) from –0.5 V
REF
to 0.5 V
REF
.
Outside this input range, the converter produces unique
overrange and underrange output codes.
REF
+
(Pin 11), REF
–
(Pin 12):
Differential Reference
Input. The voltage on these pins can have any value
between GND and V
CC
as long as the positive reference
input, REF
+
, is maintained more positive than the negative
reference input, REF
–
, by at least 0.1V.
GND (Pin 15):
Ground. Connect this pin to a ground plane
through a low impedance connection.
CS (Pin 16):
Active LOW Digital Input. A LOW on this pin
enables the SDO digital output and wakes up the ADC.
Following each conversion the ADC automatically enters
the Sleep mode and remains in this low power state as
long as CS is HIGH. A LOW-to-HIGH transition on CS
during the Data Output transfer aborts the data transfer
and starts a new conversion.
SDO (Pin 17):
Three-State Digital Output. During the Data
Output period, this pin is used as the serial data output.
When the chip select CS is HIGH (CS = V
CC
), the SDO pin
is in a high impedance state. During the Conversion and
Sleep periods, this pin is used as the conversion status
output. The conversion status can be observed by pulling
CS LOW.
SCK (Pin 18):
Bidirectional Digital Clock Pin. In Internal
Serial Clock Operation mode, SCK is used as the digital
output for the internal serial interface clock during the Data
Output period. In External Serial Clock Operation mode,
SCK is used as the digital input for the external serial
interface clock during the Data Output period. A weak
internal pull-up is automatically activated in Internal Serial
Clock Operation mode. The Serial Clock Operation mode is
determined by the logic level applied to the SCK pin at
power up or during the most recent falling edge of CS.
F
O
(Pin 19):
Frequency Control Pin. Digital input that
controls the ADC’s notch frequencies and conversion
time. When the F
O
pin is connected to GND (F
O
= 0V), the
converter uses its internal oscillator and rejects 50Hz and
60Hz simultaneously. When F
O
is driven by an external
clock signal with a frequency f
EOSC
, the converter uses this
signal as its system clock and the digital filter has 87dB
minimum rejection in the range f
EOSC
/2560
±
14% and
110dB minimum rejection at f
EOSC
/2560
±
4%.
SDI (Pin 20):
Serial Digital Data Input. During the Data
Output period, this pin is used to shift in the multiplexer
address started from the first rising SCK edge. During the
Conversion and Sleep periods, this pin is in the DON’T
CARE state. However, a HIGH or LOW logic level should be
maintained on SDI in the DON’T CARE mode to avoid an
excessive current in the SDI input buffers.
NC (Pins 13, 14):
Not Internally Connected. Do not con-
nect or connect to ground.
PIU
相關(guān)PDF資料
PDF描述
LTC2439-1IGN 8-/16-Channel 16-Bit No Latency Delta-Sigma ADC
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LTC2440IGN 24-Bit High Speed Differential delta-sigma ADC with Selectable Speed/Resolution
LTC2444 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution
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LTC24391IGN 制造商:Linear Technology 功能描述:
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