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參數(shù)資料
| 型號： | LTC2392IUK-16#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | SUCCESSIVE APPROXIMATION ADC, PQCC48 |
| 封裝： | 7 X 7 MM, LEAD FREE, PLASTIC, MO-220WKKD-2, QFN-48 |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 285K |
| 代理商： | LTC2392IUK-16#TRPBF |
LTC2392-16
239216f
applications inFormation
Parallel Modes
The parallel output data interface is active when the
SER/PAR pin is tied low and when both CS and RD are low.
The output data can be read as a 16-bit word as shown
in Figures 8, 9 and 10 or it can be read as two 8-bit bytes
by using the BYTESWAP pin. As shown in Figure 11, with
the BYTESWAP pin low, the first eight MSBs are output on
the D15 to D8 pins and the eight LSBs are output on the
D7 to DO pins. When BYTESWAP is taken high, the eight
LSBs now are output on the D15 to D8 pins and the eight
MSBs are output on the D7 to D0 pins.
Serial Modes
The serial output data interface is active when the
SER/PAR pin is tied high and when both CS and RD are
low. The serial output data will be clocked out on the
SDOUT pin when an external clock is applied to the SCLK
pin. Clocking out the data after the conversion will yield
the best performance. With a shift clock frequency of at
least 25MHz, a 500ksps throughput is achieved. The serial
output data changes state on the rising edge of SCLK and
can be captured on the falling edge of SCLK. D15 remains
valid till the first rising edge of shift clock after the first
falling edge of shift clock. The non-active digital outputs
are high impedance when operating in the serial mode.
The SDIN input pin is used to daisy-chain multiple con-
verters. This is useful for applications where hardware
constraints may limit the number of lines needed to
interface to a large number of converters. For example,
if two devices are cascaded, the MSB of the first device
will appear at the output after 17 SCLK cycles. The first
MSB is clocked in on the falling edge of the first SCLK.
See Figure 12.
Data Format
When OB/2C is high, the digital output is offset binary.
When low, the MSB is inverted resulting in two’s comple-
ment output. This pin is active in both the parallel and
serial modes of operation.
Reset
When the RESET pin is high, the LTC2392-16 is reset, and
if this occurs during a conversion, the conversion is halted
and the data bus is put into Hi-Z mode. In reset, requests
for new conversions are ignored. Once RESET returns low,
the LTC2392-16 is ready to start a new conversion after
the acquisition time has been met. See Figure 13.
Figure 8. Read the Parallel Data Continuously.
The Data Bus is Always Driven and Can’t Be Shared
CS = RD = 0
t4
t6
t16
tCONV
CNVST
BUSY
DATA BUS D[15:0]
PREVIOUS CONVERSION
NEW
239216 F08
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