Digital-to-Analog Converters integrate 10 ppm/°C reference.

Press Release Summary:

Housed in 3 x 3 mm QFN and MSOP packages, Series LTC2635 includes LTC2635-H option with 2.5 V full-scale output and LTC2635-H option providing 4.096 V full-scale output. Quad 12-bit, 10-bit, and 8-bit rail-to-rail I2C DACs operate from single 2.7-5.5 V supply with supply current of 125 µA. In addition to offering power-on reset to zero and mid-scale options, LTC2635-L also includes options for high impedance outputs at power-on reset and during shutdown.

Original Press Release:

Quad 12-Bit/10-Bit/8-Bit Rail-to-Rail I2C DACs with Internal Reference Include Reset to High Impedance Outputs for Power Supply Margining

MILPITAS, CA - Linear Technology Corporation introduces the LTC2635 quad 12-bit, 10-bit and 8-bit rail-to-rail digital-to-analog converters (DACs), which integrate a precision 10ppm/ºC reference in tiny 3mm x 3mm QFN and MSOP packages. Ordering options include 2.5V (LTC2635-L) and 4.096V (LTC2635-H) DAC full-scale outputs. In addition to offering power-on reset to zero and mid-scale options, the LTC2635-L also includes ordering options for high impedance outputs at power-on reset and during shutdown. This allows the DAC to be used in applications such as power supply margining where the DAC outputs must be electrically isolated from the power supply at power-on, before being called to action to adjust supply voltages up and down.

The LTC2635's small size and internal reference are important for a variety of industrial, automotive and ATE applications. The LTC2635 offers 12-bit performance of ±2.5LSB (max) INL error and 3nVos crosstalk, ensuring that a voltage change on one DAC has minimal effect on the other DACs. Operating from a single 2.7V to 5.5V supply, supply current is a low 125µA per DAC.

In addition to selecting one of three resolution options, designers can also choose between a 2.5V or 4.096V full-scale range, as well as power-up options for zero-scale, mid-scale or Hi-Z. The 16-pin 3mm x 3mm QFN package includes a hardware load-DAC (LDAC) pin, three address pins for selecting 27 unique I2C addresses, and a REFLO pin. The 10-pin MSOP package has just one address pin for selection of up to 3 unique addresses on the I2C bus. All LTC2635 options are guaranteed over the automotive (-40ºC to +125ºC) and commercial (0ºC to +70ºC) temperature ranges. Pricing begins at $2.03 each in 1,000-piece quantities. For more information, visit

Summary of Features: LTC2635

Integrated Precision Reference:

o 2.5V Full Scale 10ppm/ºC (LTC2635-L)

o 4.096V Full Scale 10ppm/ºC (LTC2635-H)

Maximum 12-Bit INL Error: ±2.5LSB

Pin- & Software-Compatible I2C DACs

Guaranteed Monotonic Over -40ºC to +125ºC Temperature Range

Ultralow Crosstalk Between DACs (3nVos)

Low Noise (0.75mVP-P, 0.1Hz to 200kHz)

Selectable Internal or External Reference

2.7V to 5.5V Supply Range (LTC2635-L)

Low Power Operation: 125µA per DAC

Power-On Reset to Zero-Scale, Mid-Scale or Hi-Z Options

Tiny 3mm x 3mm QFN-16 & MSOP-10 Packages

12-/10-/8-Bit Quad DACs Reset to Hi-Z

About Linear Technology

Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, µModule® products, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
LT, LTC, LTM, µModule and are registered trademarks of Linear Technology Corp. All other trademarks are the property of their respective owners.

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