LTC2195IUKG#PBF

Number of A/D Converters:	2
Base Part Number:	LTC2195
Supplier Device Package:	52-QFN (7x8)
Package / Case:	52-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C
Features:	Simultaneous Sampling
Voltage - Supply, Digital:	1.7 V ~ 1.9 V
Voltage - Supply, Analog:	1.7 V ~ 1.9 V
Reference Type:	External, Internal
Architecture:	Pipelined
Series:	--
Ratio - S/H:ADC:	1:1
Configuration:	S/H-ADC
Data Interface:	LVDS - Serial
Input Type:	Differential
Number of Inputs:	2
Sampling Rate (Per Second):	125M
Number of Bits:	16
Part Status:	Active
Packaging:	Tube

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Introduction

Data acquisition - Analog to Digital Converters (ADC) are an essential part of industrial, consumer, automotive and aerospace applications. It is a hardware block that converts an analog input signal (voltage or current) into a digital representation which can be read from an external microcontroller or computer. The LTC2195IUKG#PBF is an 8 bit sampling ADC from Linear Technology. It is used in a wide range of applications such as motor control, audio to digital conversion and embedded systems with limited power budget.

Features

The LTC2195IUKG#PBF provides a wide range of features that make it an ideal choice for many applications. It is designed to operate over a wide supply voltage range of 3.0V to 10.8V and features outstanding linearity accuracy over the entire supply range. It has ±1% integrated gain accuracy over temperature and an analog input range of 0V to VREF. In addition, it has a low power supply current of 2.5mA and a low power shutdown mode that reduces current consumption to less than 1 μA.

Applications

The LTC2195IUKG#PBF is well suited for a variety of applications. It is mainly used in motor control applications, where it measures and controls the current and other parameters associated with a motor. It can also be used in audio applications, such as digital audio recorders and players. In addition, it can be used in embedded systems, where it can be used to provide communication interface or to measure various parameters, such as voltage and temperature.

Working Principle

The LTC2195IUKG#PBF works by directly converting a low level analog signal into a digital word. The input signal is first amplified to a higher level, and then the analog-to-digital conversion is performed. The ADC has an internal sample and hold block that stores the analog signal into a register, which is then converted into a digital word by a successive approximation register (SAR). During the conversion process, the SAR continuously compares the analog signal with a binary search ladder. The final output of the conversion is sent to an output latch, where it is transferred to the external microcontroller or computer.

Conclusion

The LTC2195IUKG#PBF is a low power, 8 bit sampling ADC from Linear Technology. It is well suited for a range of industrial, consumer, automotive and aerospace applications. It features a wide supply voltage range, low current consumption and outstanding linearity accuracy over temperature. The ADC uses a successive approximation register (SAR) to convert a low level analog signal into a digital word. By providing low power, low noise and excellent linearity accuracy, the LTC2195IUKG#PBF can be used in a variety of applications, ranging from motor control to embedded systems.

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