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參數(shù)資料
| 型號： | MAX495CPA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | High-Output RS-485 Transceiver 8-PDIP -40 to 85 |
| 中文描述： | OP-AMP, 650 uV OFFSET-MAX, 0.5 MHz BAND WIDTH, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 230K |
| 代理商： | MAX495CPA |
M
S ingle/Dual/Quad, Mic ropower,
S ingle-S upply Rail-to-Rail Op Amps
the op amp in an inverting configuration (Figure 3a);
connect resistor R3 between the noninverting input and
the input signal when using the op amp in a noninvert-
ing configuration (Figure 3b). Select R3 to equal the
parallel combination of R1 and R2. High source resis-
tances will degrade noise performance, due to the ther-
mal noise of the resistor and the input current noise
(which is multiplied by the source resistance).
Input S tage Protec tion Circ uitry
T
he MAX492/MAX494/MAX495 include internal protec-
tion circuitry that prevents damage to the precision
input stage from large differential input voltages. This
protection circuitry consists of back-to-back diodes
between IN+ and IN- with two 1.7k
resistors in series
(Figure 4). The diodes limit the differential voltage
applied to the amplifiers
’
internal circuitry to no more
than V
F
, where V
F
is the diodes
’
forward-voltage drop
(about 0.7V at +25°C).
Input bias current for the ICs (±25nA typical) is speci-
fied for the small differential input voltages. For large
differential input voltages (exceeding V
F
), this protec-
tion circuitry increases the input current at IN+ and IN-:
(V
IN
+ - V
IN
- ) - V
F
2 x 1.7k
Input Current = ———————————
For comparator applications requiring large differential
voltages (greater than V
F
), you can limit the input cur-
rent that flows through the diodes with external resistors
R1
V
OUT
R3 = R2
II
R1
R3
V
IN
R2
MAX49_
Figure 3a. Reducing Offset Error Due to Bias Current:
Inverting Configuration
R3
V
OUT
R3 = R2
II
R1
V
IN
R1
R2
MAX49_
MAX492
MAX494
MAX495
1.7k
1.7k
TOINTERNAL
CIRCUITRY
TOINTERNAL
CIRCUITRY
IN–
IN+
Figure 4. Input Stage Protection Circuitry
10,000
100
1
10
100
M
RESISTIVE LOAD (k
)
C
1000
UNSTABLE REGION
V
CC
= +5V
V
OUT
= V
CC
/2
R
L
TO V
EE
A
V
= +1
Figure 5. Capacitive-Load Stable Region Sourcing Current
______________________________________________________________________________________
11
Figure 3b. Reducing Offset Error Due to Bias Current:
Noninverting Configuration
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| MAX492CSA | Single/Dual/Quad, Micropower, Single-Supply Rail-to-Rail Op Amps |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX495CPA+ | 功能描述:運算放大器 - 運放 Single uPower Single Supply Rail-Rail RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX495CSA | 功能描述:運算放大器 - 運放 Single uPower Single Supply Rail-Rail RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX495CSA+ | 功能描述:運算放大器 - 運放 Single uPower Single Supply Rail-Rail RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX495CSA+T | 功能描述:運算放大器 - 運放 Single uPower Single Supply Rail-Rail RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX495CSA-T | 功能描述:運算放大器 - 運放 Single uPower Single Supply Rail-Rail RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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