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| 型號： | AD8515ART-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP GP R-R CMOS 5MHZ SOT23-5 |
| 設(shè)計資源： | Extending the Capacitive Input Range of AD7745/AD7746 (CN0129) |
| 標準包裝： | 10,000 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 2.7 V/µs |
| 增益帶寬積： | 5MHz |
| 電流 - 輸入偏壓： | 5pA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 410µA |
| 電流 - 輸出 / 通道： | 20mA |
| 電壓 - 電源，單路/雙路(±)： | 1.8 V ~ 5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SC-74A，SOT-753 |
| 供應商設(shè)備封裝： | SOT-23-5 |
| 包裝： | 帶卷 (TR) |
AD8515
Rev. D | Page 14 of 16
A MICROPOWER REFERENCE VOLTAGE GENERATOR
Many single-supply circuits are configured with the circuit
biased to one-half of the supply voltage. In these cases, a false
ground reference can be created by using a voltage divider buffered
by an amplifier. Figure 35 shows the schematic for such a circuit.
The two 1 MΩ resistors generate the reference voltages while
drawing only 0.9 μA of current from a 1.8 V supply. A capacitor
connected from the inverting terminal to the output of the op amp
provides compensation to allow for a bypass capacitor to be
connected at the reference output. This bypass capacitor helps
establish an ac ground for the reference output.
03
02
4-
0
3
5
AD8515
C3
1F
C2
0.022F
C1
1F
R3
10k
R2
1M
R4
100
1.8V TO 5V
0.9V TO 2.5V
R1
1M
3
4
1
U1
V+
V–
+
–
Figure 35. Micropower Voltage Reference Generator
A 100 kHz SINGLE-SUPPLY SECOND-ORDER
BAND-PASS FILTER
The circuit in Figure 36 is commonly used in portable applica-
tions where low power consumption and wide bandwidth are
required. This figure shows a circuit for a single-supply band-pass
filter with a center frequency of 100 kHz. It is essential that the
op amp have a loop gain at 100 kHz to maintain an accurate center
frequency. This loop gain requirement necessitates the choice of
an op amp with a high unity gain crossover frequency, such as
the AD8515. The 4.5 MHz bandwidth of the AD8515 is sufficient
to accurately produce the 100 kHz center frequency, as the response
in Figure 37 shows. When the op amp bandwidth is close to the
center frequency of the filter, the amplifier internal phase shift
causes excess phase shift at 100 kHz, altering the filter response.
In fact, if the chosen op amp has a bandwidth close to 100 kHz,
the phase shift of the op amps causes the loop to oscillate.
A common-mode bias level is easily created by connecting the
noninverting input to a resistor divider consisting of two resistors
connected between VCC and ground. This bias point is also
decoupled to ground with a 1 μF capacitor.
C1
R1
f
L
×
π
=
2
1
C1
R1
f
H
×
π
=
2
1
R2
R1
H
+
= 1
0
V
5
V
8
.
1
=
VCC
where:
fL
is the low 3 dB frequency.
fH
is the high 3 dB frequency.
H0
is the midfrequency gain.
03
02
4-
03
6
400mV
V11
VCC
VOUT
0
R6
1M
R8
1M
C3
1F
C1
2nF
R1
5k
R2
20k
R5
2k
AD8515
3
4
1
U9
V+
V–
+
–
C6
10pF
Figure 36. Second-Order Band-Pass Filter
2
0
1k
10k
100M
03
02
4-
03
7
O
U
T
PU
T
VO
L
T
A
G
E
(
V)
FREQUENCY (Hz)
100k
1M
10M
1.5
1
0.5
Figure 37. Frequency Response of the Band-Pass Filter
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8515ART-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R I/O 5V 5-Pin SOT-23 T/R 制造商:Analog Devices 功能描述:IC SM OP-AMP LOW POWER RRI/O |
| AD8515ARTZ | 制造商:Analog Devices 功能描述:OP AMP GP R-R CMOS 5MHZ SOT23-5 制造商:Analog Devices 功能描述:OP AMP, GP, R-R, CMOS, 5MHZ, SOT23-5 |
| AD8515ARTZ-R2 | 功能描述:IC AMP GP R-R CMOS 5MHZ SOT23-5 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(shù):4 輸出類型:滿擺幅 轉(zhuǎn)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(shè)備封裝:16-SOIC N 包裝:管件 |
| AD8515ARTZ-R2 | 制造商:Analog Devices 功能描述:IC, OP-AMP, 5MHZ, 2.7V/ us, SOT-23-5 |
| AD8515ARTZ-REEL | 功能描述:IC AMP GP R-R CMOS 5MHZ SOT23-5 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(shù):4 輸出類型:滿擺幅 轉(zhuǎn)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(shè)備封裝:16-SOIC N 包裝:管件 |
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