LTC2635CMSE-LZ8#PBF

Reference Type:	External, Internal
Base Part Number:	LTC2635
Supplier Device Package:	10-MSOP-EP
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
Operating Temperature:	0°C ~ 70°C
Architecture:	--
INL/DNL (LSB):	±0.05, ±0.5 (Max)
Voltage - Supply, Digital:	2.7 V ~ 5.5 V
Voltage - Supply, Analog:	2.7 V ~ 5.5 V
Series:	--
Data Interface:	I²C
Differential Output:	No
Output Type:	Voltage - Buffered
Settling Time:	3.5µs (Typ)
Number of D/A Converters:	4
Number of Bits:	8
Part Status:	Active
Packaging:	Tube

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IntroductionThe LTC2635CMSE-LZ8#PBF is a digitally controlled, high-precision, fixed-output, CMOS, digital-to-analog converter (DAC). It is a part of Analog Devices’ family of CMOS Digital-to-Analog Converters (DACs). This DAC supports 8- and 12-bit resolution and is powered by either 3.3 V or 5 V supplies. The LTC2635CMSE-LZ8#PBF provides very high performance in a small footprint. It is optimized for low power (during standby periods) as well as for excellent power-to-performance ratio. This DAC is ideally suited for precision analog control in industrial, commercial and laboratory applications. The device is fully specified over the –40°C to +125°C temperature range which provides it with significant thermal flexibility and reliability.Application FieldsThe LTC2635CMSE-LZ8#PBF is designed to provide precision and by using a 3.3 V or 5 V supply, it can be used in various systems that operate from any of the supplies. It is recommended for applications such as voltage or current control and sensor measurement. Additionally, it offers increased flexibility for test equipment and DSP/microcontroller-controlled systems.The DAC supports an 8 or 12 bit resolution and is capable of achieving an 800 kHz software programmable update rate. An external reference allows differential error of 1LSBs, which is superior to typical devices and an internal reference, providing absolute accuracy of 2.5LSBs. Also, the device provides excellent linearity, settling time and waveform characteristics, making it ideal for system designs with demanding precision requirements.The device can accept a wide variety of command formats and can be programmed using the industry-standard SPI, I2C and 3-wire serial protocols. Ideal applications for the 8-pin LTC2635CMSE-LZ8#PBF include motor control, telecom/datacom systems, industrial process control and medical/biomedical equipment. In addition, the DAC can be used in applications such as:• Voltage supply and regulation• Sensor measurement• Amplifier gain control• Motor control• Battery level monitoring• Data acquisition• Current controlWorking PrincipleThe LTC2635CMSE-LZ8#PBF converts a digital word of 8 or 12 bits into an analog voltage that is proportional to that digital word. The converted digital word is sent to the DAC via the SPI, I2C or 3-wire serial interface. The power supply can also be adjusted to provide a wide range of output voltage ranges. Once the digital word is received, the DAC converts it into an analog voltage by using an internal reference voltage. The reference voltage is generated by a precision, low-drift bandgap reference circuit. The reference voltage is then compared to the digital word, and the difference between the two is output as the analog voltage. The accuracy of the output voltage is determined by the precision of the reference voltage. The LTC2635CMSE-LZ8#PBF offers a differential nonlinearity error of 1LSB, indicating excellent linearity as well as excellent thermal stability and accuracy.Additionally, the LTC2635CMSE-LZ8#PBF is fully specified over the –40°C to +125°C temperature range which provides the device with a broad thermal operation window and reliable operation. The device also offers a wide range of power operation options, including 3.3 V and 5 V supplies. ConclusionThe LTC2635CMSE-LZ8#PBF is a high performance 8 and 12 bit digital-to-analog converter (DAC). It is designed for use in industrial, commercial and laboratory applications and can provide excellent accuracy and linearity. The DAC is powered by either 3.3 V or 5 V supplies and offers a variety of update rates and command formats. It is fully specified over the –40°C to +125°C temperature range, allowing for greater thermal flexibility. This DAC offers excellent performance in a small footprint and is ideally suited for precision analog control in industrial, commercial and laboratory applications.

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