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參數資料
型號: LTC1598CG
廠商: Linear Technology
文件頁數: 4/24頁
文件大小: 0K
描述: IC A/D CONV 12BIT SRL 8CH 24SSOP
標準包裝: 59
位數: 12
采樣率(每秒): 16.8k
數據接口: MICROWIRE?,QSPI?,串行,SPI?
轉換器數目: 1
功率耗散(最大): 480µW
電壓電源: 單電源
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 24-SSOP(0.209",5.30mm 寬)
供應商設備封裝: 24-SSOP
包裝: 管件
輸入數目和類型: 8 個單端,單極
產品目錄頁面: 1346 (CN2011-ZH PDF)
12
LTC1594/LTC1598
15948fb
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 LTC1594/LTC1598 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
1594/98 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 LTC1594/LTC1598 channel selection.
Table 1. Logic Table for the LTC1594 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 LTC1598 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 LTC1594/LTC1598 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
1594/98 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 = 5.000V)
4.99878V
4.99756V
0.00122V
0V
1594/98 AI04
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