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參數資料
| 型號： | MAX495 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Output RS-485 Transceiver 8-SOIC -40 to 85 |
| 中文描述： | 單/雙/四路、微功耗、單電源、滿擺幅運算放大器 |
| 文件頁數： | 13/16頁 |
| 文件大小： | 230K |
| 代理商： | MAX495 |
The MAX492/MAX494/MAX495 can drive capacitive
loads in excess of 1000pF under certain conditions
(Figure 5). When driving capacitive loads, the greatest
potential for instability occurs when the op amp is
sourcing approximately 100μA. Even in this case, sta-
bility is maintained with up to 400pF of output capaci-
tance. If the output sources either more or less current,
stability is increased. These devices perform well with a
1000pF pure capacitive load (Figure 6). Figure 7 shows
the performance with a 500pF load in parallel with vari-
ous load resistors.
To increase stability while driving large capacitive
loads, connect a pull-up resistor at the output to
decrease the current that the amplifier must source. If
the amplifier is made to sink current rather than source,
stability is further increased.
Frequency stability can be improved by adding an out-
put isolation resistor (R
S
) to the voltage-follower circuit
(Figure 8). This resistor improves the phase margin of
the circuit by isolating the load capacitor from the op
amp’s output. Figure 9a shows the MAX492 driving
10,000pF (R
L
≥
100k
), while Figure 9b adds a 47
isolation resistor.
M
S ingle/Dual/Quad, Mic ropower,
S ingle-S upply Rail-to-Rail Op Amps
______________________________________________________________________________________
13
V
IN
50mV/div
V
OUT
50mV/div
10
μ
s/div
V
IN
50mV/div
V
OUT
50mV/div
10
μ
s/div
MAX495
V
OUT
V
CC
2
3
1k
1k
+5V
7
4
6
MAX49_
V
OUT
V
IN
C
L
R
S
Figure 10. Power-Up Test Configuration
Figure 9b. Driving a 10,000pF Capacitive Load with a 47
Isolation Resistor
Figure 9a. Driving a 10,000pF Capacitive Load
Figure 8. Capacitive-Load Driving Circuit
相關PDF資料 |
PDF描述 |
|---|---|
| MAX495CPA | High-Output RS-485 Transceiver 8-PDIP -40 to 85 |
| MAX495CSA | High-Output RS-485 Transceiver 8-PDIP -40 to 85 |
| MAX495EPA | High-Output RS-485 Transceiver 8-SOIC -40 to 85 |
| MAX495ESA | High-Output RS-485 Transceiver 8-SOIC -40 to 85 |
| MAX495MJA | High-Output RS-485 Transceiver 8-SOIC -40 to 85 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX4950ACTX+ | 功能描述:均衡器 Single PCIe Re-Driver RoHS:否 制造商:Texas Instruments |
| MAX4950ACTX+T | 功能描述:IC PCIE REDRIVER DUAL 36-TQFN RoHS:是 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發(fā)器 系列:- 標準包裝:1,240 系列:GD 類型:收發(fā)器 驅動器/接收器數:3/5 規(guī)程:RS232 電源電壓:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:20-DIP（0.300"，7.62mm） 供應商設備封裝:20-PDIP 包裝:管件 |
| MAX4950CTO+ | 功能描述:IC PCIE REDRIVER 3.3V 42TQFN RoHS:是 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發(fā)器 系列:- 標準包裝:2,500 系列:- 類型:驅動器 驅動器/接收器數:4/0 規(guī)程:RS422 電源電壓:4.5 V ~ 5.5 V 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:帶卷 (TR) |
| MAX4950CTO+T | 功能描述:IC PCIE REDRIVER 3.3V 42TQFN RoHS:是 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發(fā)器 系列:- 標準包裝:1,240 系列:GD 類型:收發(fā)器 驅動器/接收器數:3/5 規(guī)程:RS232 電源電壓:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:20-DIP（0.300"，7.62mm） 供應商設備封裝:20-PDIP 包裝:管件 |
| MAX4951AECTP+ | 功能描述:緩沖器和線路驅動器 SATA I/II Bidirect Re-Driver RoHS:否 制造商:Micrel 輸入線路數量:1 輸出線路數量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
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