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參數(shù)資料
| 型號(hào)： | OP471GSZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP GP 6.5MHZ QUAD 16SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 4 |
| 轉(zhuǎn)換速率： | 8 V/µs |
| 增益帶寬積： | 6.5MHz |
| 電流 - 輸入偏壓： | 25nA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 9.2mA |
| 電壓 - 電源，單路/雙路(±)： | ±4.5 V ~ 18 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC W |
| 包裝： | 帶卷 (TR) |
REV. A
OP471
–12–
Quad Programmable Gain Amplifier
The combination of the quad OP471 and the DAC8408, a quad
8-bit CMOS DAC, creates a space-saving quad programmable gain
amplifier. The digital code present at the DAC, which is easily
set by a microprocessor, determines the ratio between the fixed
DAC feedback resistor and the impedance the DAC ladder presents
to the op amp feedback loop. Gain of each amplifier is:
V
= –
256
n
OUT
IN
where n equals the decimal equivalent of the 8-bit digital code
present at the DAC. If the digital code present at the DAC
consists of all zeros, the feedback loop will be open causing the
op amp output to saturate. The 20 M
W resistors placed in parallel
with the DAC feedback loop eliminates this problem with a very
small reduction in gain accuracy.
1/4
OP470E
+15V
–15V
VOUTA
IOUT1A
DAC A
VREF
IOUT2A/2B
RFBA
DGND
VDD
DAC-8408ET
VINA
DAC DATA BUS
PINS 9 (LSB) – 16 (MSB)
R1
20M
1/4
OP470E
VOUTB
IOUT1B
DAC B
VREF
RFBB
VINB
R2
20M
1/4
OP470E
VOUTC
IOUT1C
DAC C
VREF
RFBC
VINC
R3
20M
1/4
OP470E
VOUTD
IOUT1D
VREF
RFBD
VIND
R4
20M
DAC D
IOUT2C/2D
A
B
C
D
Figure 17. Quad Programmable Gain Amplifier
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OP471K | 制造商:Ohmite Mfg Co 功能描述: |
| OP471P | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Speed, Low Noise Quad Operational Amplifier |
| OP471S | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Speed, Low Noise Quad Operational Amplifier |
| OP471Y | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Speed, Low Noise Quad Operational Amplifier |
| OP472GS | 制造商:Analog Devices 功能描述: |
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