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參數(shù)資料
| 型號： | MAX4044 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Replaced by TMS320VC5506 : |
| 中文描述： | 單/雙/四路、低成本、SOT23封裝、微功耗、滿擺幅輸入/輸出運(yùn)算放大器 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大小： | 199K |
| 代理商： | MAX4044 |
M
S ingle/Dual/Quad, Low-Cost, S OT 23,
Mic ropower, Rail-to-Rail I/O Op Amps
______________________________________________________________________________________
11
For example, a MAX4040 running from a single +2.4V
supply, operating at T
A
= +25°C, can source 240μA to
within 100mV of V
CC
and is capable of driving a 9.6k
load resistor to V
EE
:
The same application can drive a 4.6k
load resistor
when terminated in V
CC
/ 2 (+1.2V in this case).
Driving Capac itive Loads
The MAX4040–MAX4044 are unity-gain stable for loads
up to 200pF (see Load Resistor vs. Capacitive Load
graph in Typical Operating Characteristics).
Applications that require greater capacitive drive capa-
bility should use an isolation resistor between the output
and the capacitive load (Figures 6a–6c). Note that this
alternative results in a loss of gain accuracy because
R
ISO
forms a voltage divider with the load resistor.
Power-S upply Bypassing and Layout
The MAX4040–MAX4044 family operates from either a
single +2.4V to +5.5V supply or dual ±1.2V to ±2.75V
supplies. For single-supply operation, bypass the
power supply with a 100nF capacitor to V
EE
(in this
case GND). For dual-supply operation, both the V
CC
and V
EE
supplies should be bypassed to ground with
separate 100nF capacitors.
Good PC board layout techniques optimize perfor-
mance by decreasing the amount of stray capacitance
at the op amp’s inputs and output. To decrease stray
capacitance, minimize trace lengths by placing exter-
nal components as close as possible to the op amp.
Surface-mount components are an excellent choice.
Using the MAX 4040–MAX 4044
as Comparators
Although optimized for use as operational amplifiers,
the MAX4040–MAX4044 can also be used as rail-to-rail
I/O comparators. Typical propagation delay depends
on the input overdrive voltage, as shown in Figure 7.
External hysteresis can be used to minimize the risk of
output oscillation. The positive feedback circuit, shown
in Figure 8, causes the input threshold to change when
the output voltage changes state. The two thresholds
create a hysteresis band that can be calculated by the
following equations:
V
HYST
= V
HI
- V
LO
V
LO
= V
IN
x R2 / (R1 + (R1 x R2 / R
HYST
) + R2)
V
HI
= [(R2 / R1 x V
IN
) + (R2 / R
HYST
) x V
CC
] /
(1 + R1 / R2 + R2 / R
HYST
)
R = 2.4V - 0.1V
240 A
9.6k to V
EE
=
50mV/div
IN
OUT
50mV/div
MAX4040/42/44 fig06b
100
μ
s/div
R
ISO
= NONE, R
L
= 100k
, C
L
= 700pF
Figure 6b. Pulse Response without Isolating Resistor
50mV/div
IN
OUT
50mV/div
MAX4040/42/44 fig06c
100
μ
s/div
R
ISO
= 1k
, R
L
= 100k
, C
L
= 700pF
Figure 6c. Pulse Response with Isolating Resistor
R
ISO
C
L
R
L
MAX4040–
MAX4044
V
= R
L
≈
1
A
+ R
ISO
Figure 6a. Using a Resistor to Isolate a Capacitive Load from
the Op Amp
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4040EUK-T | Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op Amps |
| MAX4043ESD | Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op Amps |
| MAX4043EUB | Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op Amps |
| MAX4044ESD | Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op Amps |
| MAX4042EUA | Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op Amps |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4044ESD | 功能描述:運(yùn)算放大器 - 運(yùn)放 uPower 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(bǔ)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(fēng)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 |
| MAX4044ESD+ | 功能描述:運(yùn)算放大器 - 運(yùn)放 uPower 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(bǔ)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(fēng)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 |
| MAX4044ESD+T | 功能描述:運(yùn)算放大器 - 運(yùn)放 uPower 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(bǔ)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(fēng)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 |
| MAX4044ESD-T | 功能描述:運(yùn)算放大器 - 運(yùn)放 uPower 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(bǔ)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(fēng)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 |
| MAX40-45CA | 制造商:MDE 制造商全稱:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR (TVS) DIODE STAND-OFF VOLTAGE 12 TO 150 Volts 40000 Watt Peak Pulse Power |
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