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參數(shù)資料
| 型號： | LTC1594LIS |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 4/24頁 |
| 文件大小： | 0K |
| 描述： | IC A/D CONV 12BIT SRL 4CH 16SOIC |
| 標準包裝： | 50 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 10.5k |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 1.6mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 8 個單端，單極 |
12
LTC1594L/LTC1598L
15948lfb
after a delay of tOFF, all the channels are switched off to
ensure a break-before-make interval. After this interval,
the selected channel is switched on allowing signal
transmission. The selected channel remains on until the
next falling edge of CS and the process repeats itself with
the “EN” bit being logic high. If the “EN” bit is logic low,
all the channels are switched off simultaneously after a
delay of tOFF from CS being pulled low and all the
channels remain off until the next falling edge of CS.
Input Data Word
When CS is high, the LTC1594L/LTC1598L clock data
into the DIN inputs on the rising edge of the clock and
store the data into a 4-bit register. The input data words
are defined as follows:
D0
EN
D2
D1
CHANNEL SELECTION
1594L/98L AI02
“EN” Bit
The first bit in the 4-bit register is an “EN” bit. If the “EN”
bit is a logic high, as illustrated in Figure 1, it enables the
selected channel after a delay of tON when the CS is pulled
low. If the “EN” bit is logic low, as illustrated in Figure 2,
it disables all channels after a delay of tOFF when the CS
is pulled low.
Multiplexer (MUX) Address
The 3 bits of input word following the “EN” bit select the
channel in the MUX for the requested conversion. For a
given channel selection, the converter will measure the
voltage of the selected channel with respect to the voltage
on the COM pin. Tables 1 and 2 show the various bit
combinations for the LTC1594L/LTC1598L channel
selection.
Table 1. Logic Table for the LTC1594L Channel Selection
CHANNEL STATUS
EN
D2
D1
DO
All Off
0
X
CH0
1
0
CH1
1
0
1
CH2
1
0
1
0
CH3
1
0
1
APPLICATIONS INFORMATION
WU
U
Table 2. Logic Table for the LTC1598L Channel Selection
CHANNEL STATUS
EN
D2
D1
DO
All Off
0
X
CH0
1
0
CH1
1
0
1
CH2
1
0
1
0
CH3
1
0
1
CH4
1
0
CH5
1
0
1
CH6
1
0
CH7
1
Transfer Curve
The LTC1594L/LTC1598L are permanently configured
for unipolar only. The input span and code assignment
for this conversion type is illustrated below.
Transfer Curve
0V
1LSB
V
REF
–2LSB
VREF
4096
V
REF
–1LSB
V
REF
VIN
0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 0
1594L/98L AI03
1LSB =
Output Code
OUTPUT CODE
1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0
INPUT VOLTAGE
VREF – 1LSB
VREF – 2LSB
1LSB
0V
INPUT VOLTAGE
(VREF = 2.500V)
2.49939V
2.49878V
0.00061V
0V
1594L/98L AI04
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