參數(shù)資料
型號: LTC2436-1CGN
廠商: Linear Technology
文件頁數(shù): 3/28頁
文件大?。?/td> 0K
描述: IC ADC 2CH DIFF-IN 16BIT 16SSOP
標準包裝: 100
位數(shù): 16
采樣率(每秒): 6.8
數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
轉換器數(shù)目: 1
功率耗散(最大): 1mW
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: 16-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 16-SSOP
包裝: 管件
輸入數(shù)目和類型: 1 個差分,雙極
LTC2436-1
11
24361f
below –FS, the conversion result is clamped to the value
corresponding to –FS – 1LSB.
Simultaneous Frequency Rejection
The LTC2436-1 internal oscillator provides better than
87dB normal mode rejection over the range of 49Hz to
61.2Hz as shown in Figure 4. For this simultaneous 50Hz/
60Hz rejection, FO should be connected to GND.
When a fundamental rejection frequency different from
the range 49Hz to 61.2Hz is required or when the converter
must be sychronized with an outside source, the LTC2436-1
can operate with an external conversion clock. The conveter
Table 2. LTC2436-1 Output Data Format
Differential Input Voltage
Bit 18
Bit 17
Bit 16
Bit 15
Bit 14
Bit 13
Bit 12
Bit 0
VIN*
EOC
CH0/CH1
SIG
MSB
VIN* ≥ 0.5 VREF**
0
0/1
1
0
0
0.5 VREF** – 1LSB
0
0/1
1
0
1
1
0.25 VREF**
0
0/1
1
0
1
0
0
0.25 VREF** – 1LSB
0
0/1
1
0
1
1
0
0/1
1
0
0
–1LSB
0
0/1
0
1
1
– 0.25 VREF**
0
0/1
0
1
0
0
– 0.25 VREF** – 1LSB
0
0/1
0
1
0
1
1
– 0.5 VREF**
0
0/1
0
1
0
0
VIN* < –0.5 VREF**
0
0/1
0
1
1
*The differential input voltage VIN = IN+ – IN.
**The differential reference voltage VREF = REF+ – REF.
Figure 4. LTC2436-1 Normal Mode
Rejection When Using an Internal Oscillator
48
50
52
54
56
58
60
62
DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz)
NORMAL
MODE
REECTION
RATIO
(dB)
24361 F04
–80
–90
–100
–120
–130
–140
automatically detects the presence of an external clock
signal at the FO pin and turns off the internal oscillator. The
frequency fEOSC of the external signal must be at least
2560Hz to be detected. The external clock signal duty cycle
is not significant as long as the minimum and maximum
specifications for the high and low periods, tHEO and tLEO,
are observed.
While operating with an external conversion clock of a
frequency fEOSC,theLTC2436-1providesbetterthan110dB
normal mode rejection in a frequency range fEOSC/2560
±4%. The normal mode rejection as a function of the input
frequency deviation from fEOSC/2560 is shown in Figure 5.
APPLICATIO S I FOR ATIO
WU
UU
Figure 5. LTC2436-1 Normal Mode Rejection When
Using an External Oscillator of Frequency fEOSC
DIFFERENTIAL INPUT SIGNAL FREQUENCY
DEVIATION FROM NOTCH FREQUENCY fEOSC/2560(%)
–12
–8
–4
048
12
NORMAL
MODE
REJECTION
(dB)
24361 F05
–80
–85
–90
–95
–100
–105
–110
–115
–120
–125
–130
–135
–140
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