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Applications Battery-operated instrumentation Servo amplifiers Actuator drives Sensor conditioners Power supply control. Each VR has its own VR latch that holds its programmed resistance value. The device is fully specified with a single 12 V supply. Inherent in the design is low charge injection for minimum transients when switching the digital inputs.
The only external components that are required in addition to normal transient protection circuitry are three low cost capacitors which are dqtasheet in the DAC output filter. To provide flexibility to the system designer, the AD can be operated in either latched or transparent mode. This yields performance that dafasheet be used to implement high accuracy systems, even in single-supply designs. In the off condition, signal levels up to the supplies are blocked.
The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the VR latch.
By using a bipolar front end, lower noise and higher accuracy than those of CMOS designs have been achieved. These devices perform the same electronic adjustment function as a potentiometer or variable resistor.
The first three bits are decoded to determine which VR latch is loaded with the last eight bits of the data-word when the CS strobe is returned to logic high. When they are on, each switch conducts equally well in both directions and has an input signal range that extends to the power supplies. These VR latches are updated from an internal serial-to-parallel shift register that is loaded from a standard 3-wire serial-input digital interface. High switching speed also makes the device suitable for video signal switching.
A serial data output pin at the opposite end of the serial register AD only allows simple daisy chaining in multiple VR applications without requiring additional external decoding logic. The variable resistor offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper.
CMOS construction ensures ultralow power dissipation, making the device ideally suited for portable, battery-powered instruments. Applications Mechanical potentiometer replacement Instrumentation: Stability while driving capacitive loads is another benefit of this design over CMOS rail-to-rail amplifiers.
All switches exhibit break-before-make switching action for use in multiplexer applications. The small signal bandwidth is kHz at a gain of It provides a high precision, fully integrated, low cost single-chip solution for generating current loop signals in a compact pin SOIC or PDIP package. Analog Devices also offers over 30 other high speed amplifiers from the low noise AD 1. Low gain error and low nonlinearity make the AD ideal for precision instrumentation applications requiring programmable gain.
The ADGA switches are turned on with a logic low on the appropriate dxtasheet input. You can contact us any way that is convenient for you.
Eleven data bits make up the data-word clocked datashert the serial input register. For users of 3. Home Products News contact. For applications in which the analog signal is unipolar, the ADGA can be operated from a single rail power supply. These switches also feature high switching speeds and low RON.
This is useful for driving coax cable or large FET transistors. Product Highlights Extended signal range. Full-scale settling to 0. The FET-input stage results in a low bias current of 50 pA. Applications Audio and video switching Battery-powered systems Test equipment Communication systems. The devices can operate comfortably anywhere in the datashete The on-resistance profile is very flat over the full analog input range, ensuring good linearity and low distortion when switching audio signals.
It can be used in three-wire or asynchronous mode and a serial-out pin is provided to allow daisy chaining of multiple DACs on the current loop side of the isolation barrier.
Each switch conducts equally well in both directions when ON and each has an input signal range that extends to the supplies. This dafasheet designs to achieve higher efficiencies and to transfer more power to the load than previously possible without the use of discrete components. In addition, the AD provides catasheet dc precision. If you have questions or suggestions,please leave add707aq a message,we will reply you as soon as we can!
Common-mode rejection is a minimum of 78 dB. Low charge inject is inherent in the design.
ADAQ Datasheet(PDF) – Analog Devices
If the AD is going to be used at extreme temperatures and supply voltages, an external output transistor can be used to minimize power dissipation on the chip via the “BOOST” pin. It is complete, including amplifier, resistor network and TTL-compatible latched inputs, and requires no external components. This multiplexer also features high switching speeds datashfet low RON. For applications such as transformers that require dataaheet inductive loads, increases in efficiency are also possible.