LTC2633ACTS8-HI12#TRPBF

Reference Type:	External, Internal
Base Part Number:	LTC2633
Supplier Device Package:	TSOT-23-8
Package / Case:	SOT-23-8 Thin, TSOT-23-8
Operating Temperature:	0°C ~ 70°C
Architecture:	--
INL/DNL (LSB):	±0.5, ±1 (Max)
Voltage - Supply, Digital:	5V
Voltage - Supply, Analog:	5V
Series:	--
Data Interface:	I²C
Differential Output:	No
Output Type:	Voltage - Buffered
Settling Time:	4.7µs (Typ)
Number of D/A Converters:	2
Number of Bits:	12
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Data Acquisition - Digital to Analog Converters (DAC)

The LTC2633ACTS8-HI12#TRPBF is a digital-to-analog converter (DAC) that provides 12-bit resolution on a single 5 V power supply. The device is capable of being powered from a single 3.3 V power supply and combines very low noise, low power consumption and fast settling time. The DACs can operate in either voltage output or current output configuration and are equipped with a control input (CS1).

High Resolution and Very Low Noise

The LTC2633ACTS8-HI12#TRPBF provides a resolution of 12 bits and very low noise of -90dB inclusive of offset and full scale errors. The device offers an excellent performance over temperature with guaranteed specifications of ±1LSB max integral nonlinearity (INL) and ±0.5LSB max differential nonlinearity (DNL). The wide operating voltage range of 2.3V to VDDit allows to use in most digital systems with both 3.3V and 5V supplies.

I2C Interface

The device integrates an I2C interface for communication with a digital controller. This serial data bus includes a two-wire serial clock (SCL) and data (SDA) line and it can be operated in either high-speed or fast-speed mode at 400 kHz or 100 kHz, respectively.The device includes an auto-increment function that allows data to be written to consecutive registers without re-sending the slave address. The auto-increment counter increases by one after each data byte is sent. This feature allows multiple DACs in a single system to be controlled simultaneously with a single register write command.

Environmental and Package Optimization

The LTC2633ACTS8-HI12#TRPBF is housed in a tiny MS8 8-lead plastic surface mount package and is available with a lead-free option, which is fully compliant with the RoHS and all relevant environmental regulations. This device is not susceptible to latch-up, takes no positive or negative current during operation, and is capable of operation over the full military temperature range (-55°C to 125°C).

Output Current Scaling and Monotonicity

The device\'s output scaling allows for a large range of output currents from the very small to full scale. The outputs can be current-scaled down to 0.25 mA/step and to 0.125 mA/step for current range ≤ 5 mA. This allows for improved accuracy, greater dynamic range and improved monotonicity.

Power Down Mode

The devices feature low power consumption and can be powered down with a simple command. This allows the outputs to be powered down separately after the output current has been scaled to the required level. The power down current of the device is typically 450 nA.

Current Output Configuration

The LTC2633ACTS8-HI12#TRPBF has the ability to work in current output configuration which is useful in applications where long cables need to be driven. The current output mode allows the outputs to be configured in each DAC individually.

Working Principle

The LTC2633ACTS8-HI12#TRPBF is a digital-to-analog converter that converts a digital input code into a proportional analog output voltage or current. When the device is powered up and the CS1 control input is asserted, the DAC is put into active mode. The binary number is sent over the I2C bus then shifted in at the falling edge of the SCLK. The output change takes place on the rising edge. The DAC is designed to have low power consumption, fast settling time and very low noise. To achieve these characteristics, it features an internal reference voltage, an internal current output amplifier, an input multiplexer and a capacitor array for provides high resolution and low noise.

Application Fields

The LTC2633ACTS8-HI12#TRPBF is suitable for use in a wide variety of applications. These include exacting industrial, instrumentation and control systems requiring signal conditioning, industrial control and automation, high-speed data acquisition, instrumentation and control systems, industrial process control, sound systems, medical imaging and laboratory equipment.

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