AD2S1200YSTZ

Series:	--
Packaging:	Tray
Part Status:	Active
Type:	R/D Converter
Number of Channels:	2
Resolution (Bits):	12 b
Sampling Rate (Per Second):	--
Data Interface:	Serial, Parallel
Voltage Supply Source:	Analog and Digital
Voltage - Supply:	5V
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	44-LQFP
Supplier Device Package:	44-LQFP (7x7)
Base Part Number:	AD2S1200

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Introduction

The AD2S1200YSTZ is a programmable resolution sigma-delta (Σ-Δ) modulator designed to provide an accurate numerical representation of a slowly changing analog input voltage. It is offered in a 16-pin surface mount, small outline package and supports a wide variety of analog input signals. The AD2S1200YSTZ is an ideal choice for low cost position and velocity sensors, motor control applications, actuator and servo motor applications, and other industrial applications.

Application Field and Working Principle

The AD2S1200YSTZ is designed to digitally encode an analog input signal. It has a linear input range up to ±0.3 V and can directly interface to various sensors such as potentiometers, bridge transducers, encoders, etc. The device\'s operating principle is based on a low-noise, single-bit sigma-delta modulator that provides a digital output for incremental motion. With a synchronous clock and a digital interface, it can be used to build digital position and velocity sensing systems.The AD2S1200YSTZ operates from a single 3 V to 3.6 V supply and can be used with a wide range of input frequencies. The fully differential input architecture includes 0 V to +1 V digital reference level that can be used to generate bipolar electro-optical position transducer (EOPT) signals. The maximum differential input voltage is limited to 1.3 V, which allows the device to be driven directly by a differential sensor such as an incremental encoder.The AD2S1200YSTZ accurately encodes analog input signals and can provide resolutions up to 24 bits. The internal digital-to-analog convertor (DAC) uses a sigma-delta AD convertor scheme to interpolate between two digitally weighted input bits using the successive-approximation scheme. The interpolation ratio can be set from 16 to 9921, with each step in the digital output sequence representing a certain angle of rotation.The AD2S1200YSTZ can also be used to detect zero crossing points in a sine wave, as well as phase-lock loop tracking systems. It also has a high-impedance input buffer that allows direct connection to transducers without external amplifiers.

Conclusion

The AD2S1200YSTZ is an ideal solution for low cost position and velocity sensors, motor control applications, and actuator/servo motor applications. It can be used to build digital position sensing systems with a synchronous clock and digital interface. With resolution up to 24 bits, this device can accurately encode analog input signals and provide phase-lock loop tracking. Additionally, it has a high-impedance input buffer which allows direct connection to transducers without an external amplifier.

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