參數(shù)資料
型號: CXD2587
廠商: Sony Corporation
英文描述: RESISTOR,MIL-PRF-39007/9
中文描述: CD數(shù)字信號處理器,具有內(nèi)置數(shù)字伺服和DAC
文件頁數(shù): 61/106頁
文件大?。?/td> 807K
代理商: CXD2587
– 61 –
CXD2587Q
Analog out
C2
680p
12k
12k
12k
C1
150p
AOUT1 (2)
AIN1 (2)
LOUT1 (2)
Vc
Fig. 3-13. LPF External Circuit
§3-11. LPF Block
The CXD2587Q contains an initial-stage secondary active LPF with numerous resistors and capacitors and an
operational amplifier with reference voltage.
The resistors and capacitors are attached externally, allowing the cut-off frequency fc to be determined flexibly.
The reference voltage (V
C
) is (AV
DD
– AV
SS
)
×
0.43.
The LPF block application circuit is shown below.
In this circuit, the cut-off frequency is fc
40kHz.
The external capacitors' values when fc = 30kHz and 50kHz are noted below as a reference.
The resistors' values do not change at this time.
When fc
30kHz:
C1 = 200pF, C2 = 910pF
When fc
50kHz:
C1 = 120pF, C2 = 560pF
LPF Block Application Circuit
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