- 您现在的位置：买卖IC网 > PDF目录166204 > ALD1722EDA (Advanced Linear Devices, Inc.) EPAD⑩ OPERATIONAL AMPLIFIER PDF资料下载
参数资料
| 型号： | ALD1722EDA |
| 厂商： | Advanced Linear Devices, Inc. |
| 英文描述： | EPAD⑩ OPERATIONAL AMPLIFIER |
| 中文描述： | EPAD⑩运算放大器 |
| 文件页数： | 2/10页 |
| 文件大小： | 64K |
| 代理商： | ALD1722EDA |
10
Advanced Linear Devices
ALD1722E/ALD1722
DEFINITIONS AND DESIGN NOTES:
1. Initial Input Offset Voltage is the offset voltage of the
ALD1722E/ALD1722 operational amplifier as shipped from the
factory. The device has been pre-programmed and tested for
programmability.
2. Offset Voltage Program Range is the range of adjustment of
user specified target offset voltage. This is typically an adjust-
ment in either the positive or the negative direction of the input
offset voltage from an initial offset voltage. The input offset
program pins, VE1 or VE2, change the input offset voltage in the
negative or positive direction, respectively. User specified target
offset voltage can be any offset voltage within this programming
range.
3. Programmed Input Offset Voltage Error is the final offset
voltage error after programming, when the Input Offset Voltage
is at target Offset Voltage. This parameter is sample tested.
4. Total Input Offset Voltage is the same as Programmed Input
Offset Voltage, corrected for system offset voltage error. Usu-
ally this is an all inclusive system offset voltage, which also
includes offset voltage contributions from input offset voltage,
PSRR, CMRR, TCVos and noise. It can also include errors
introduced by external components, at a system level. Pro-
grammed Input Offset Voltage and Total Input Offset Voltage is
not necessarily zero offset voltage, but an offset voltage set to
compensate for other system errors as well. This parameter is
sample tested.
5. The Input Offset and Bias Currents are essentially input
protection diode reverse bias leakage currents. This low input
bias current assures that the analog signal from the source will
not be distorted by it. For applications where source impedance
is very high, it may be necessary to limit noise and hum pickup
through proper shielding.
6. Input Voltage Range is determined by two parallel comple-
mentary input stages that are summed internally, each stage
having a separate input offset voltage. While Total Input Offset
Voltage can be trimmed to a desired target value, it is essential
to note that this trimming occurs at only one selected input bias
voltage. Depending on the selected input bias voltage relative to
the power supply voltages, offset voltage trimming may affect
one or both input stages. For the ALD1722E/ALD1722, the
switching point between the two stages occur at approximately
1.5V above the negative supply voltage
7. Input Offset Voltage Drift is the average change in Total Input
Offset Voltage as a function of ambient temperature. This
parameter is sample tested.
8. Initial PSRR and initial CMRR specifications are provided as
reference information. After programming, error contribution to
the offset voltage from PSRR and CMRR is set to zero under the
specific power supply and common mode conditions, and
becomes part of the Programmed Input Offset Voltage Error.
9. Average Long Term Input Offset Voltage Stability is based on
input offset voltage shift through operating life test at 125
degrees C extrapolated to Ta = 25 degrees C, assuming
activation energy of 1.0eV. This parameter is sample tested.
ADDITIONAL DESIGN NOTES:
A. The ALD1722E/ALD1722 is internally compensated for unity
gain stability using a novel scheme which produces a single pole
role off in the gain characteristics while providing more than 70
degrees of phase margin at unity gain frequency. A unity gain
buffer using the ALD1722E/ALD1722 will typically drive 400pF
of external load capacitance; in the inverting unity gain configu-
ration, it can drive up to 800pF of load capacitance.
B. The ALD1722E/ALD1722 has complementary p-channel
and n-channel input differential stages connected in parallel to
accomplish rail to rail input common mode voltage range. The
switching point between the two differential stages is 1.5V
above negative supply voltage. For applications such as invert-
ing amplifier or non-inverting amplifier with a gain larger than 2.5
(5V operation), the common mode voltage does not make
excursions below this switching point. However, this switching
does take place if the operational amplifier is connected as a rail-
to- rail unity gain buffer and the design must allow for input offset
voltage variations.
C. The output stage consists of class AB complementary output
drivers. The oscillation resistant feature, combined with the rail-
to-rail input and output feature, makes the ALD1722E/ALD1722
an effective analog signal buffer for high source impedance
sensors, transducers, and other circuit networks.
D. The ALD1722E/ALD1722 has static discharge protection.
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. The user is advised
to power up the circuit before, or simultaneously with, any input
voltages applied and to limit input voltages to not exceed 0.3V
of the power supply voltage levels.
E. VE1 and VE2 are high impedance terminals, as the internal
bias currents are set very low to a few microamperes to
conserve power. For some applications, these terminals may
need to be shielded from external coupling sources. For ex-
ample, digital signals running nearby may cause unwanted
offset voltage fluctuations. Care during the printed circuit board
layout to place ground traces around these pins and to isolate
them from digital lines would generally eliminate such coupling
effects. In addition, optional decoupling capacitors of 1000pF or
greater value can be added to VE1 and VE2 terminals.
F. The ALD1722E/ALD1722 is designed for use in low voltage,
micro-power circuits. The maximum operating voltage during
normal operation should remain below 10 Volts at all times. Care
should be taken to insure that the application in which the
devices are used would not experience any positive or negative
transient voltages that cause any of the terminal voltages to
exceed this limit.
G. All inputs or unused pins except VE1 and VE2 pins should be
connected to a supply voltage such as Ground so that they do
not become floating pins, since input impedance at these pins
is very high. If any of these pins are left undefined, they may
cause unwanted oscillation or intermittent excessive current
drain. As these devices are built with CMOS technology, normal
operating and storage temperature limits, ESD and latchup
handling precautions pertaining to CMOS device handling
should be observed.
相关PDF资料 |
PDF描述 |
|---|---|
| ALD1726EDA | EPAD⑩ ULTRA MICROPOWER OPERATIONAL AMPLIFIER |
| ALD25G48 | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| ALD2701BDA | 10BT MODULAR PARALLEL ADAPTER |
| ALD2706 | DUAL ULTRA MICROPOWER RAIL TO RAIL CMOS OPERATIOAAL AMPLIFIER |
| ALD2706A | DUAL ULTRA MICROPOWER RAIL TO RAIL CMOS OPERATIOAAL AMPLIFIER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ALD1722EPA | 功能描述:运算放大器 - 运放 Precision LP 300mV 4000pF 0.01pA 1.5MHz RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| ALD1722EPAL | 功能描述:运算放大器 - 运放 EPAD(R) Hi-Precision RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| ALD1722ESA | 制造商:ALD 制造商全称:Advanced Linear Devices 功能描述:EPAD⑩ OPERATIONAL AMPLIFIER |
| ALD1722ESAL | 功能描述:运算放大器 - 运放 EPAD(R) Hi-Precision RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| ALD1722GPAL | 功能描述:运算放大器 - 运放 CMOS OP Amp .01pA/25uV RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。