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參數(shù)資料
| 型號： | ALD4701SBL |
| 廠商： | Advanced Linear Devices Inc |
| 文件頁數(shù)： | 4/9頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP GP R-R CMOS QUAD 14SOIC |
| 標(biāo)準(zhǔn)包裝： | 56 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 4 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 1 V/µs |
| 增益帶寬積： | 1MHz |
| 電流 - 輸入偏壓： | 1pA |
| 電壓 - 輸入偏移： | 10000µV |
| 電流 - 電源： | 480µA |
| 電流 - 輸出 / 通道： | 1mA |
| 電壓 - 電源，單路/雙路(±)： | 2 V ~ 12 V，±1 V ~ 6 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOIC |
| 包裝： | 管件 |
| 其它名稱： | 1014-1178 |
ALD4701A/ALD4701B
Advanced Linear Devices
4 of 9
ALD4701
TYPICAL PERFORMANCE CHARACTERISTICS
INPUT BIAS CURRENT AS A FUNCTION
OF AMBIENT TEMPERATURE
AMBIENT TEMPERATURE (°C)
1000
100
10
0.1
1.0
INPUT
BIAS
CURRENT
(pA)
100
-25
0
75
125
50
25
-50
10000
VS = ±2.5V
OPEN LOOP VOLTAGE GAIN AS A
FUNCTION OF LOAD RESISTANCE
10M
LOAD RESISTANCE ()
10K
100K
1M
1000
100
10
1
OPEN
LOOP
VOLTAGE
GAIN
(V/mV)
VS = ±2.5V
TA = 25°C
COMMON MODE INPUT VOLTAGE RANGE
AS A FUNCTION OF SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
COMMON
MODE
INPUT
VOLTAGE
RANGE
(V)
±7
±6
±5
±4
±3
±2
±1
0
±1
±2
±3
±4
±5
±6
±7
TA = 25°C
Design & Operating Notes:
1. The ALD4701A/ALD4701B/ALD4701 CMOS operational amplifier uses
a 3 gain stage architecture and an improved frequency compensation
scheme to achieve large voltage gain, high output driving capability,
and better frequency stability. In a conventional CMOS operational
amplifier design, compensation is achieved with a pole splitting capaci-
tor together with a nulling resistor. This method is, however, very bias
dependent and thus cannot accommodate the large range of supply
voltage operation as is required from a stand alone CMOS operational
amplifier. The ALD4701A/ALD4701B/ALD4701 is internally compen-
sated for unity gain stability using a novel scheme that does not use a
nulling resistor. This scheme produces a clean single pole roll off in the
gain characteristics while providing for more than 70 degrees of phase
margin at the unity gain frequency.
2. The ALD4701A/ALD4701B/ALD4701 has complementary p-channel
and n-channel input differential stages connected in parallel to accom-
plish rail-to-rail input common mode voltage range. This means that
with the ranges of common mode input voltage close to the power
supplies, one of the two differential stages is switched off internally. To
maintain compatibility with other operational amplifiers, this switching
point has been selected to be about 1.5V below the positive supply
voltage. Since offset voltage trimming on the ALD4701A/ALD4701B/
ALD4701 is made when the input voltage is symmetrical to the supply
voltages, this internal switching does not affect a large variety of
applications such as an inverting amplifier or non-inverting amplifier
with a gain larger than 2.5 (5V operation), where the common mode
voltage does not make excursions above this switching point. The user
should however, be aware that this switching does take place if the
operational amplifier is connected as a unity gain buffer and should
make provision in his design to allow for input offset voltage variations.
3. The input bias and offset currents are essentially input protection diode
reverse bias leakage currents, and are typically less than 1pA at room
temperature. This low input bias current assures that the analog signal
from the source will not be distorted by input bias currents. Normally,
this extremely high input impedance of greater than 1012 would not be
a problem as the source impedance would limit the node impedance.
However, for applications where source impedance is very high, it may
be necessary to limit noise and hum pickup through proper shielding.
4. The output stage consists of class AB complementary output drivers,
capable of driving a low resistance load. The output voltage swing is
limited by the drain to source on-resistance of the output transistors as
determined by the bias circuitry, and the value of the load resistor.
When connected in the voltage follower configuration, the oscillation
resistant feature, combined with the rail to rail input and output feature,
makes an effective analog signal buffer for medium to high source
impedance sensors, transducers, and other circuit networks.
5. The ALD4701A/ALD4701B/ALD4701 operational amplifier has been
designed to provide full static discharge protection. Internally, the
design has been carefully implemented to minimize latch up. However,
care must be exercised when handling the device to avoid strong static
fields that may degrade a diode junction, causing increased input
leakage currents. In using the operational amplifier, the user is advised
to power up the circuit before, or simultaneously with, any input
voltages applied and to limit input voltages not to exceed 0.3V of the
power supply voltage levels.
6. The ALD4701A/ALD4701B/ALD4701, with its micropower operation,
offers numerous benefits in reduced power supply requirements, less
noise coupling and current spikes, less thermally induced drift, better
overall reliability due to lower self heating, and lower input bias current.
It requires practically no warm up time as the chip junction heats up to
only 0.4°C above ambient temperature under most operating condi-
tions.
SUPPLY
CURRENT
(
A)
SUPPLY CURRENT AS A FUNCTION
OF SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
1600
800
1200
0
400
0
±1
±2
±3
±4
±5
±6
TA = -55°C
+25°C
+70°C
+125°C
INPUTS GROUNDED
OUTPUT UNLOADED
-25°C
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