參數(shù)資料
型號(hào): LTC2424CG
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): ADC
英文描述: 16-Bit 2.5-V to 3.3-V/3.3-V To 5-V Level Shifting Transceiver With 3-State Outputs 56-BGA MICROSTAR JUNIOR -40 to 85
中文描述: 4-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28
封裝: 0.209 INCH, PLASTIC, SSOP-28
文件頁(yè)數(shù): 18/36頁(yè)
文件大?。?/td> 409K
代理商: LTC2424CG
LTC2412
18
2412f
APPLICATIU
W
U
U
The serial data output pin (SDO) is Hi-Z as long as CS is
HIGH. At any time during the conversion cycle, CS may be
pulled LOW in order to monitor the state of the converter.
While CS is pulled LOW, EOC is output to the SDO pin.
EOC=1 while a conversion is in progress and EOC = 0 if
the device is in the sleep state. With CS high, the device
automatically enters the low power sleep state once the
conversion is complete.
When the device is in the sleep state (EOC = 0), its
conversion result is held in an internal static shift regis-
ter. Data is
shifted out the SDO pin on each falling edge of
SCK. This enables external circuitry to latch the output on
the rising edge of SCK. EOC can be latched on the first
rising edge of SCK and the last bit of the conversion result
can be latched on the 32nd rising edge of SCK. On the
32nd falling edge of SCK, the device begins a new conver-
sion. SDO goes HIGH (EOC = 1) indicating a conversion is
in progress.
At the conclusion of the data cycle, CS may remain LOW
and EOC monitored as an end-of-conversion interrupt.
Alternatively, CS may be driven HIGH setting SDO to Hi-Z.
As described above, CS may be pulled LOW at any time in
order to monitor the conversion status.
Typically, CS remains LOW during the data output state.
However, the data output state may be aborted by pulling
CS HIGH anytime between the first rising edge and the
32nd falling edge of SCK, see Figure 6. On the rising edge
of CS, the device aborts the data output state and imme-
diately initiates a new conversion. This is useful for sys-
tems not requiring all 32 bits of output data, aborting an
invalid conversion cycle or synchronizing the start of a
conversion.
External Serial Clock, 2-Wire I/O
This timing mode utilizes a 2-wire serial I/O interface. The
conversion result is shifted out of the device by an exter-
nally generated serial clock (SCK) signal, see Figure 7. CS
may be permanently tied to ground, simplifying the user
interface or isolation barrier.
The external serial clock mode is selected at the end of the
power-on reset (POR) cycle. The POR cycle is concluded
Figure 6. External Serial Clock, Reduced Data Output Length
SDO
SCK
(EXTERNAL)
CS
DATA
OUTPUT
CONVERSION
SLEEP
SLEEP
TEST EOC (OPTIONAL)
TEST EOC
DATA OUTPUT
Hi-Z
Hi-Z
Hi-Z
CONVERSION
2412 F06
MSB
SIG
CH0/CH1
BIT 8
BIT 27
BIT 9
BIT 28
BIT 29
BIT 30
EOC
BIT 31
BIT 0
EOC
Hi-Z
TEST EOC
= 50Hz REJECTION
= EXTERNAL OSCILLATOR
= 60Hz REJECTION
V
CC
V
CC
F
O
REF
+
SCK
CH1
+
CH1
SDO
GND
CS
1
14
2
3
13
6
7
12
8, 9, 10, 15, 16
11
REFERENCE
VOLTAGE
0.1V TO V
CC
CH0
+
CH0
4
5
ANALOG INPUT RANGE
–0.5V
REF
TO 0.5V
REF
1
μ
F
2.7V TO 5.5V
LTC2412
3-WIRE
SPI INTERFACE
REF
SLEEP
相關(guān)PDF資料
PDF描述
LTC2424I 16-Bit 2.5-V to 3.3-V/3.3-V To 5-V Level Shifting Transceiver With 3-State Outputs 54-BGA MICROSTAR JUNIOR -40 to 85
LTC2424IG 16-Bit 2.5-V to 3.3-V/3.3-V To 5-V Level Shifting Transceiver With 3-State Outputs 48-TSSOP -40 to 85
LTC2440 2-Channel Differential Input 24-Bit No Latency DS ADC
LTC2411-1 16-Bit Universal Bus Driver With 3-State Outputs 48-TVSOP -40 to 85
LTC2412 16-Bit Universal Bus Driver With 3-State Outputs 48-SSOP -40 to 85
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