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參數(shù)資料
| 型號(hào)： | OP470EY |
| 廠商： | PRECISION MONOLITHICS INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Very Low Noise Quad Operational Amplifier |
| 中文描述： | QUAD OP-AMP, 500 uV OFFSET-MAX, 6 MHz BAND WIDTH, CDIP14 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 687K |
| 代理商： | OP470EY |
REV. A
OP470
–13–
N
10
0%
100
90
Figure 14. Noise Density of Low Noise Amplifier, G = 1000
DIGITAL PANNING CONTROL
Figure 15 uses a DAC-8408, quad 8-bit DAC to pan a signal
between two channels. The complementary DAC current out-
puts two of the DAC-8408’s four DACs drive current-to-voltage
converters built from a single quad OP470. The amplifiers have
complementary outputs with the amplitudes dependent upon
the digital code applied to the DAC. Figure 16 shows the comple-
mentary outputs for a 1 kHz input signal and digital ramp applied
to the DAC data inputs. Distortion of the digital panning con-
trol is less than 0.01%.
10
0%
100
90
1ms
5V
5V
A OUT
A
OUT
Figure 16. Digital Panning Control Output
Gain error due to the mismatching between the internal DAC
ladder resistors and the current-to-voltage feedback resistors is
eliminated by using feedback resistors internal to the DAC. Of
the four DACs available in the DAC-8408, only two DACs, A
and C, actually pass a signal. DACs B and D are used to pro-
vide the additional feedback resistors needed in the circuit. If
the VREFB and VREFD inputs remain unconnected, the
current-to-voltage converters using RFBB and RFBD are unaf-
fected by digital data reaching DACs B and D.
1/4
OP470E
+15V
–15V
1/4
OP470E
A OUT
20pF
A
OUT
20pF
I
OUT1A
DAC A
I
OUT1B
DAC B
R
FB
A
I
OUT2A/2B
R
FB
B
R
FB
C
1/4
OP470E
B OUT
20pF
DAC C
I
OUT1C
1/4
OP470E
B
OUT
20pF
I
OUT1D
DAC D
R
FB
D
I
OUT2C/2D
V
REF
A
DAC SELECT
1k
1k
5V
DGND
DS2
DS1
R/
W
A/
B
V
REF
C
V
DD
DAC-8408GP
SIDE A IN
SIDE B IN
DAC DATA BUS
PINS 9 (LSB) – 16 (MSB)
5V
Figure 15. Digital Panning Control Circuit
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OP-470EY | 制造商:AD 制造商全稱:Analog Devices 功能描述:VERY LOW NOISE QUAD OPERATIONAL AMPLIFIER |
| OP470FY | 制造商:Analog Devices 功能描述: |
| OP-470FY | 制造商:AD 制造商全稱:Analog Devices 功能描述:VERY LOW NOISE QUAD OPERATIONAL AMPLIFIER |
| OP470G | 制造商:Analog Devices 功能描述: |
| OP-470G | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual/Quad Low Noise, Precision Operational Amplifiers |
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