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參數(shù)資料
| 型號： | MAX4291EXK-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Ultra-Small, !.8V, レPower, Rail-to-Rail I/O Op Amps |
| 中文描述： | OP-AMP, 3000 uV OFFSET-MAX, 0.5 MHz BAND WIDTH, PDSO5 |
| 封裝： | SC-70, 5 PIN |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 397K |
| 代理商： | MAX4291EXK-T |
The MAX4291/MAX4292/MAX4294 family’s inputs are
protected from large differential input voltages by inter-
nal 10.6k
series resistors and back-to-back triple-
diode stacks across the inputs (Figure 2). For
differential input voltages (much less than 1.8V), input
resistance is typically 0.75M
. For differential input
voltages greater than 1.8V, input resistance is around
21.2k
, and the input bias current can be approximat-
ed by the following equation:
In the region where the differential input voltage
approaches 1.8V, the input resistance decreases expo-
nentially from 0.75M
to 21.2k
as the diode block
begins to conduct. Conversely, the bias current
increases with the same curve.
In unity-gain configuration, high slew rate input signals
may capacitively couple to the output through the triple-
diode stacks.
Rail-to-Rail Output Stage
The MAX4291/MAX4292/MAX4294 output stage can
drive up to a 2k
load and still swing to within 20mV of
the rails. Figure 3 shows the output voltage swing of a
MAX4291 configured as a unity-gain buffer, powered
from a ±2.5V supply. The output for this setup typically
swings from (V
EE
+ 3mV) to (V
CC
- 2mV) with a 100k
load.
Applications Information
Power-Supply Considerations
The MAX4291/MAX4292/MAX4294 operate from a sin-
gle +1.8V to +5.5V supply (or dual ±0.9V to ±2.75V
supplies) and consume only 100μA of supply current
per amplifier. A high power-supply rejection ratio of
80dB allows the amplifiers to be powered directly off a
decaying battery voltage, simplifying design and
extending battery life.
The MAX4291/MAX4292/MAX4294 are ideally suited for
use with most battery-powered systems. Table 1 lists a
variety of typical battery types showing voltage when
fresh, voltage at end-of-life, capacity, and approximate
operating time from a MAX4291 (assuming nominal
conditions).
I
(V
-1.8V)
21.2k
BIAS
DIFF
=
M
Ultra-Small, +1.8V, μPower,
Rail-to-Rail I/O Op Amps
_______________________________________________________________________________________
9
Table 1. MAX4291 Characteristics with Typical Battery Systems
750
Yes
Nickel-Cadmium
(2 cells)
1000
Yes
Lithium-Ion
(1 cell)
1000
Yes
Nickel-Metal-
Hydride (2 cells)
2000
No
Alkaline (2 cells)
BATTERY TYPE
CAPACITY, AA SIZE
(mA-h)
2.4
3.5
2.4
3.0
1.8
2.7
1.8
1.8
V
END-OF-LIFE
(V)
V
FRESH
(V)
RECHARGE-
ABLE
7500
10,000
10,000
20,000
MAX4291
OPERATING TIME IN
NORMAL MODE
(h)
OUT
2.5V/div
IN
2.5V/div
0
0
20
μ
s/div
V
CC
= +2.5V, V
EE =
-2.5V
Figure 3. Rail-to-Rail Input/Output Voltage Range
10.6k
10.6k
IN-
IN+
Figure 2. Input Protection Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4291 | Ultra-Small, !.8V, レPower, Rail-to-Rail I/O Op Amps |
| MAX4291EUK-T | Ultra-Small, !.8V, レPower, Rail-to-Rail I/O Op Amps |
| MAX4292 | Ultra-Small, !.8V, レPower, Rail-to-Rail I/O Op Amps |
| MAX4294 | Ultra-Small, !.8V, レPower, Rail-to-Rail I/O Op Amps |
| MAX4310EUA | High-Speed, Low-Power, Single-Supply, Multichannel, Video Multiplexer-Amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4292EBL | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX4292EBL+ | 制造商:Maxim Integrated Products 功能描述:OP AMP DUAL GP R-R I/O 2.75V/5.5V 8UCSP - Rail/Tube |
| MAX4292EBL+T | 功能描述:運算放大器 - 運放 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 |
| MAX4292EBL-T | 功能描述:運算放大器 - 運放 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 |
| MAX4292ESA | 功能描述:運算放大器 - 運放 1.8V 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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