- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄5921 > ADA4817-1ARDZ-R7 (Analog Devices Inc)IC OPAMP VF 410MHZ LN 40MA 8SOIC PDF資料下載
參數(shù)資料
| 型號： | ADA4817-1ARDZ-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 15/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP VF 410MHZ LN 40MA 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 系列： | FastFET™ |
| 放大器類型： | 電壓反饋 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 870 V/µs |
| 增益帶寬積： | 410MHz |
| -3db帶寬： | 1.05GHz |
| 電流 - 輸入偏壓： | 2pA |
| 電壓 - 輸入偏移： | 400µV |
| 電流 - 電源： | 19mA |
| 電流 - 輸出 / 通道： | 40mA |
| 電壓 - 電源，單路/雙路(±)： | 5 V ~ 10 V，±2.5 V ~ 5 V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm Width）裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC-EP |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當(dāng)前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
ADA4817-1/ADA4817-2
Data Sheet
Rev. B | Page 22 of 28
ACTIVE LOW-PASS FILTER (LPF)
Active filters are used in many applications such as antialiasing
filters and high frequency communication IF strips.
With a 410 MHz gain bandwidth product and high slew rate,
the ADA4817-1/ADA4817-2 is an ideal candidate for active
filters. Moreover, thanks to the low input bias current provided
by the FET stage, the ADA4817-1/ADA4817-2 eliminate any dc
errors. Figure 54 shows the frequency response of 90 MHz and
45 MHz LPFs. In addition to the bandwidth requirements, the slew
rate must be capable of supporting the full power bandwidth of the
filter. In this case, a 90 MHz bandwidth with a 2 V p-p output
swing requires at least 870 V/μs. This performance is achievable
at 90 MHz only because of the wide bandwidth and high slew
rate of the ADA4817-1/ADA4817-2.
The circuit shown in Figure 55 is a 4-pole, Sallen-Key, low-pass
filter (LPF). The filter comprises two identical cascaded Sallen-
Key LPF sections, each with a fixed gain of G = 2. The net gain
of the filter is equal to G = 4 or 12 dB. The actual gain shown in
Figure 54 is 12 dB. This does not take into account the output
voltage being divided in half by the series matching termination
resistor, RT, and the load resistor.
Setting the resistors equal to each other greatly simplifies the
design equations for the Sallen-Key filter. To achieve 90 MHz
the value of R should be set to 182 Ω. However, if the value of R
is doubled, the corner frequency is cut in half to 45 MHz. This
would be an easy way to tune the filter by simply multiplying
the value of R (182 Ω) by the ratio of 90 MHz and the new
corner frequency in megahertz. Figure 54 shows the output of
each stage of the filter and the two different filters corresponding
to R = 182 Ω and R = 365 Ω. It is not recommended to increase
the corner frequency beyond 90 MHz due to bandwidth and
slew rate limitations unless unity-gain stages are acceptable.
Resistor values are kept low for minimal noise contribution,
offset voltage, and optimal frequency response. Due to the low
capacitance values used in the filter circuit, the PCB layout and
minimization of parasitics is critical. A few picofarads can detune
the corner frequency, fc, of the filter. The capacitor values shown
in Figure 55 actually incorporate some stray PCB capacitance.
Capacitor selection is critical for optimal filter performance.
Capacitors with low temperature coefficients, such as NPO
ceramic capacitors and silver mica, are good choices for filter
elements.
15
–42
100k
1G
FREQUENCY (Hz)
M
AG
NI
T
UDE
(
d
B
)
12
9
6
3
0
–3
–6
–9
–12
–15
–18
–21
–24
–27
–30
–33
–36
–39
1M
10M
100M
07
75
6-
06
2
OUT2, f = 90MHz
OUT1, f = 90MHz
OUT1, f = 45MHz
OUT2, f = 45MHz
Figure 54. Low-Pass Filter Response
U1
C1
3.9pF
C2
5.6pF
R
RT
49.9
R
R1
348
R
R2
348
RT
49.9
+IN1
–5V
+5V
0.1F
10F
U2
C3
3.9pF
C4
5.6pF
R
R3
348
R4
348
–5V
+5V
0.1F
10F
OUT2
077
56
-054
OUT1
Figure 55. 4-Pole Sallen-Key Low-Pass Filter (ADA4817-2)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OP284FSZ-REEL7 | IC OPAMP GP R-R 4.25MHZ LN 8SOIC |
| AD8295ACPZ-WP | IC AMP INST 1MHZ TRPL LN 16LFCSP |
| GTCS25-900M-R02 | GAS TUBE 5MM 90V 20% 2.5KA SMD |
| 961103-6700-AR-TP | CONN HEADER VERT 3POS GOLD SMD |
| TSW-137-07-G-D | CONN HEADER 74POS .100" DL GOLD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4817-1ARDZ-RL | 功能描述:IC OPAMP VF 410MHZ LN 40MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:FastFET™ 標(biāo)準(zhǔn)包裝:1 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:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
| ADA4817-2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Noise, 1 GHz FastFET Op Amps |
| ADA4817-2ACP-EBZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Noise, 1 GHz FastFET Op Amps |
| ADA4817-2ACPZ-R2 | 制造商:Analog Devices 功能描述:OP Amp Dual Volt Fdbk 制造商:Analog Devices 功能描述:OP AMP DUAL VOLT FDBK 5V/10V 16LFCSP EP - Tape and Reel 制造商:Analog Devices 功能描述:OP-AMP FET DUAL 1GHZ 16LFCSP 制造商:Analog Devices 功能描述:OP-AMP, FET, DUAL, 1GHZ, 16LFCSP 制造商:Analog Devices 功能描述:OP-AMP, FET, DUAL, 1GHZ, 16LFCSP; Op Amp Type:Low Noise; No. of Amplifiers:2; Slew Rate:870V/s; Supply Voltage Range:5V to 10V; Amplifier Case Style:LFCSP; No. of Pins:16; Bandwidth:1.05GHz; Operating Temperature Min:-40C; ;RoHS Compliant: Yes |
| ADA4817-2ACPZ-R2 | 制造商:Analog Devices 功能描述:Operational Amplifier IC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。