DAC offers 6 software-programmable output ranges.
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Press Release Summary:
Operating from dual ±5-±15 V analog supplies and 3-5 V digital supply, 16-bit quad Vout Model LTC2704-16 features DC performance of ±2 LSB INL and ±1 LSB DNL. Each of 4 DACs can be programmed via 3-wire SPI-compatible serial interface for 1 of 4 bipolar output ranges or 1 of 2 unipolar output ranges. Reference input voltages are inverted internally and can be driven to 7.25 V, producing output swings up to ±14.5 V. Output ranges include ±10 V, ±5 V, ±2.5 V, -2.5 to 7.5 V, 0-5 V, and 0-10 V.
Original Press Release:
16-Bit, Quad VOUT DAC Features Software-Programmable Output Ranges To ±10V
MILPITAS, CA - November 16, 2006 - Linear Technology Corporation introduces the LTC2704-16, a 16-bit, quad voltage-output DAC with six software-programmable output voltage ranges. Each of the four DACs can be programmed via a 3-wire SPI-compatible serial interface for one of four bipolar output ranges (±10V, ±5V, ±2.5V, or -2.5 to 7.5V) or one of two unipolar output ranges (0V to 5V, or 0V to 10V). The LTC2704-16 offers excellent DC performance of ±2LSB(max) INL and ±1LSB(max) DNL. The LTC2704-16 operates from dual ±5V to ±15V analog supplies, and a 3V to 5V digital supply. The DAC's software-programmable SoftSpan(TM) output ranges and serial readback of all internal registers make it ideal for industrial and process control applications, instrumentation, and automatic test equipment.
The LTC2704-16 offers a reference input for each pair of DACs. These reference input voltages are inverted internally and can be driven to 7.25V, producing output swings up to ±14.5V. The LTC2704-16's output buffers swing to within 500mV of each power supply rail without any degradation in accuracy. The output buffers deliver accurate ±10V outputs on 12V ±10% industrial supplies. Each DAC includes an offset adjustment pin, a system offset buffered ground connection and a voltage feedback pin, enabling remote force and sense applications. The DAC outputs directly drive capacitive loads up to 1000pF or current loads up to 5mA. In addition, low output voltage noise (0.8uVRMS) reduces the need for output filtering. A mid-scale transition on the 0V to 5V output scale typically causes only a 2nV-sec glitch impulse, and a full-scale 20V transition settles to within 1LSB in 10us. The LTC2704-16 draws 4.5mA of supply current per DAC at ±15V and features a sleep mode that reduces supply current to 1mA(max).
The LTC2704-14 and LTC2704-12 are pin-compatible 14-bit and 12-bit devices, respectively. The LTC2704-16, LTC2704-14, and LTC2704-12 are each available in SSOP-44 packages, offering a pin-compatible and code-compatible family for performance/cost optimization in the end product. The entire family is available in commercial and industrial temperature ranges. Pricing begins at $29.95 each for the LTC2704-16, $24.95 each for the LTC2704-14, and $19.95 each for the LTC2704-12 in 1,000-piece quantities.
Summary of Features: LTC2704-16/LTC2704-14/LTC2704-12
o Six Software-Programmable Output Ranges: ±10V, ±5V, ±2.5V, -2.5V to 7.5V, 0V to 5V, 0V to 10V
o LTC2704-16: ±2LSB(max) INL, ±1LSB(max) DNL
o Serial Readback of All Internal Registers
o Glitch Impulse < 2nV.sec
o Force/Sense Outputs Enable Remote Sensing
o 5mA Output Current Drive
o Shutdown Mode Reduces Supply Current to 1mA
o Pin-Compatible 16-Bit/14-Bit/12-Bit DACs (LTC2704-16/LTC2704-14/LTC2704-12)
o Power-On Reset Clears Outputs to Zero Volts
o SPI-Compatible Serial I/O
o SSOP-44 Package
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, 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. For more information, visit www.linear.com
LT, LTC, LTM and are registered trademarks and SoftSpan is a trademark of Linear Technology Corp.
John Hamburger, Director Marketing Communications
jhamburger@linear.com
Tel 408-432-1900 ext
Doug Dickinson, Media Relations Manager
ddickinson@linear.com
408-432-1900
