LTC7545ACG#PBF

Series:	--
Packaging:	Tube
Part Status:	Active
Number of Bits:	12
Number of D/A Converters:	1
Settling Time:	1µs
Output Type:	Current - Unbuffered
Differential Output:	No
Data Interface:	Parallel
Reference Type:	External
Voltage - Supply, Analog:	5V, 14.25 V ~ 15.75 V
Voltage - Supply, Digital:	5V, 14.25 V ~ 15.75 V
INL/DNL (LSB):	±0.5 (Max), ±0.5 (Max)
Architecture:	R-2R
Operating Temperature:	-40°C ~ 85°C
Package / Case:	20-SSOP (0.209", 5.30mm Width)
Supplier Device Package:	20-SSOP
Base Part Number:	LTC7545

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Data Acquisition - Digital to Analog Converters (DAC)

The LTC7545ACG#PBF is a monolithic, 8-bit Digital to Analog Converter (DAC). It is a device designed for ease of operation and low-cost applications. The DAC offers 8 bits of resolution and provides an output current adjustable between 0-20mA. The DAC is designed to operate in a simple, loop configuration and offers an adjustable gain and offset thereby removing the need for external components. It is also designed for use in a variety of applications requiring accurate, low noise, low power conversion.

Overview of the LTC7545ACG#PBF

The LTC7545ACG#PBF is an 8-bit, cost optimized digital to analog converter, incorporating programmable gain and offset features. These features are used to perform high accuracy digital to analog conversion, with a resolution of 1296 voltage steps across a 20V span. With 8 bits of resolution, it achieves a linearity error of 2.25 CountRMS, making it suitable for many high resolution applications.The device is based on an interleaved switched-capacitor architecture that minimizes external component count and operating voltage. It includes a select switch, input comparator and an analog multiplexer. The on-chip settings are adjustable via external programming pins that are integrated into the device.

LTC7545ACG#PBF Pin-Outs

The LTC7545ACG#PBF device has a total of eight pins as follows: - Inputs: PIN1 (VIN_PGM), PIN2 (VIN_GND), PIN3 (VIN_OWF)- Outputs: PIN4 (VOUT_DAC), PIN5 (VOUT_GND)- Programming: PIN6 (VCC_PGM), PIN7 (VREF), PIN8 (VREF_GND)The input pins connect to the source of the digital signal to be converted. The output pins connect to the load, providing the analog output voltage. The programming inputs are used to adjust the gain and offset in the device.

Working Principle

The LTC7545ACG#PBF is designed to operate in a two-stage feedback loop. It consists of an 8-bit digital input which is compared to the gain setting, followed by a digital-to-analog conversion. The output of the DAC is fed back to the input and the input voltage is adjusted so that the analog output matches the digital input.The gain is adjustable using the VCC_PGM pin. The adjustable gain feature removes the need for external resistors and capacitors. Once the gain is set the DAC can convert the signal into an adjustable analog output. The device has a low noise, low power operation and is suitable for a wide range of applications.

Applications

The LTC7545ACG#PBF is suitable for applications requiring accurate, low noise and low power conversion. Typical applications include:- Control systems- Power management systems- Instrumentation and data acquisition systems- Communication systems- Industrial process control systems- Precision motor and linear actuator systems- Automotive and industrial safety and monitoring applicationsIt is also suitable for use in scientific and laboratory instruments, as well as computer peripherals and data acquisition systems.

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