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參數資料
| 型號： | AD8591 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifiers with Shutdown |
| 中文描述： | CMOS單電源軌到軌輸入/輸出運算放大器，帶有關斷 |
| 文件頁數： | 10/15頁 |
| 文件大小： | 227K |
| 代理商： | AD8591 |
AD8591/AD8592/AD8594
–10–
REV. A
If gain is required from the output amplifier, four additional
resistors should be added as shown in Figure 35. The gain of
the AD8592 can be set as:
A
R
R
V
=
7
6
(5)
U1-A
R2
2k
V
4
C1
100
m
F
+5V
1
10
2
3
5
+5V
V
DD
V
DD
LEFT
OUT
AD1881
(AC97)
RIGHT
OUT
V
SS
R4
20
V
+5V
R1
100k
V
7
8
6
9
R5
20
V
C2
100
m
F
NOTE: ADDITIONAL PINS
OMITTED FOR CLARITY
U1-B
U1 = AD8592
R3
2k
V
R7
20k
V
R7
20k
V
V
REF
R6
10k
V
R6
10k
V
A
V
=
= +6dB WITH VALUES SHOWN
R7
R6
NC
38
35
27
36
Figure 35. A PC-98 Compliant Headphone/Line Out
Amplifier With Gain
Input coupling capacitors are not required for either circuit as
the reference voltage is supplied from the AD1881.
R4 and R5 help protect the AD8592 output in case the output
jack or headphone wires accidentally get shorted to ground.
The output coupling capacitors C1 and C2 block dc current
from the headphones and create a high-pass filter with a corner
frequency of:
f
C
R
R
dB
L
–3
1
2
1
4
=
+
(
)
π
(6)
Where R
L
is the resistance of the headphones.
A Combined Microphone and Speaker Amplifier for
Cellphone and Portable Headsets
The dual amplifiers in the AD8592 make an efficient design for
interfacing with a headset containing a microphone and speaker.
Figure 36 demonstrates a simple method for constructing an
interface to a codec.
U1-A
4
+5V
1
10
2
3
5
C2
10
m
F
U1 = AD8592
7
8
6
9
R5
10k
V
U1-B
R6
10k
(OPTIONAL)
R4
10k
V
FROM CODEC
MONO OUT
(OR LEFT OUT)
TO
CODEC
R3
100k
V
V
FROM CODEC
MIC + SPEAKER
JACK
R1
2.2k
V
+5V
R2
10k
V
R8
100k
V
+5V
C1
0.1
m
F
NC
(RIGHT OUT)
R7
1k
V
Figure 36. A Speaker/Mic Headset Amplifier Circuit
U1-A is used as a microphone preamplifier, where the gain of
the preamplifier is set as R3/R2. R1 is used to bias an electret
microphone and C1 blocks any dc voltages from the amplifier.
U1-B is the speaker amplifier, and its gain is set at R5/R4. To
sum a stereo output, R6 should be added, equal in value to R4.
Using the same principle as described in the previous section,
the normalizing contact on the microphone/speaker jack can be
used to put the AD8592 into shutdown when the headset is not
plugged in. The AD8592 shutdown inputs can also be con-
trolled with TTL or CMOS compatible logic, allowing micro-
phone or speaker muting if desired.
An Inexpensive Sample-and-Hold Circuit
The independent shutdown control of each amplifier in the
AD8592 allows a degree of flexibility in circuit design. One par-
ticular application for which this feature is useful is in designing a
sample-and-hold circuit for data acquisition. Figure 37 shows a
schematic of a simple, yet extremely effective sample-and-hold
circuit using a single AD8592 and one capacitor.
V
IN
U1-A
C1
1nF
U1-B
SAMPLE
AND HOLD
OUTPUT
+5V
1
2
3
5
9
8
7
6
SAMPLE
CLOCK
U1 = AD8592
+5V
4
10
Figure 37. An Efficient Sample-and-Hold Circuit
相關PDF資料 |
PDF描述 |
|---|---|
| AD8591ART | CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifiers with Shutdown |
| AD8592ARM | CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifiers with Shutdown |
| AD8594AR | CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifiers with Shutdown |
| AD8594ARU | CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifiers with Shutdown |
| AD8599 | Dual Ultralow Distortion, Ultralow Noise Op Amp |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8591ART | 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS Single Supply Rail-to-Rail Input/Output Operational Amplifiers with Shutdown |
| AD8591ART-REEL | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R I/O 6V 6-Pin SOT-23 T/R 制造商:Rochester Electronics LLC 功能描述:SINGLE, CMOS RAIL-RAIL OP AMP W/SHUTDOWN - Tape and Reel |
| AD8591ART-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R I/O 6V 6-Pin SOT-23 T/R 制造商:Rochester Electronics LLC 功能描述:SINGLE, CMOS RAIL-RAIL OP AMP W/SHUTDOWN - Tape and Reel |
| AD8591ARTZ-REEL | 功能描述:IC OPAMP GP R-R CMOS SOT23-6 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:160 系列:- 放大器類型:通用 電路數:4 輸出類型:滿擺幅 轉換速率:10 V/µs 增益帶寬積:9MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:250µV 電流 - 電源:730µA 電流 - 輸出 / 通道:28mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC N 包裝:管件 |
| AD8591ARTZ-REEL7 | 功能描述:IC OPAMP GP R-R CMOS SOT23-6 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 特色產品:CMOS Operational Amplifier 標準包裝:2,500 系列:- 放大器類型:通用 電路數:2 輸出類型:滿擺幅 轉換速率:1 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:1000µV 電流 - 電源:900µA 電流 - 輸出 / 通道:1mA 電壓 - 電源，單路/雙路(±):5 V ~ 14.5 V，±2.5 V ~ 7.25 V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.173"，4.40mm 寬） 供應商設備封裝:8-SOP 包裝:帶卷 (TR) 產品目錄頁面:1372 (CN2011-ZH PDF) 其它名稱:BD7562SF-E2TR |
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