Converters feature software-programmable output ranges.
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Press Release Summary:
SoftSpan(TM) 12-bit LTC1588 and 14-bit LTC1589 are current-output DACs, programmed with 3-wire serial interface to operate in any one of 6 output ranges. All output spans have specifications of ±1LSB INL and ±1LSB DNL. Units require 5 V reference, dual op amp, and feedback capacitor. They have 2 nV-s glitch impulse, ensuring low distortion in digital waveform generation. Asynchronous clear pin resets devices to 0 V output regardless of output range selected.
Original Press Release:
12- & 14-Bit SoftSpan DACs Feature Software Programmable Output Ranges & Simplified System Design
MILPITAS, CA - July 16, 2003 - Linear Technology introduces the LTC1588 and LTC1589, the first 12- and 14-bit current output DACs with a software programmable output range. The SoftSpan(TM) DACs are easily programmed with a 3-wire serial interface to operate in any one of six possible output ranges: two unipolar (0V to 5V, 0V to 10V) and four bipolar (±2.5V, ±5V, ±10V and -2.5V to 7.5V). All output spans have ultra-precise specifications of ±1LSB INL, ±1LSB DNL and excellent gain specifications over the industrial temperature range. The LTC1588 and LTC1589 are pin compatible with the LTC1592 16-bit SoftSpan DAC, providing an easy upgrade path for users wishing to increase resolution.
Designers no longer need precision resistors, switches and external amplifiers for range switching. Fewer components means easier and faster design, which ensures faster product delivery to market. A single board design can serve several applications, such as instrumentation and data acquisition, without requiring jumpers for different versions of the board. The only external components needed to get the SoftSpan DAC up and running are a precision 5V reference, a dual op amp and a feedback capacitor.
The LTC1588 and LTC1589 have ultra-low 2nV-s glitch impulse, ensuring low distortion in digital waveform generation and reducing overshoot in industrial process control and optical switches and filters for communications applications. The asynchronous clear pin always resets the devices to zero volts output regardless of the output range selected.
The LTC1588 and LTC1589 are available in a 16-pin SSOP package over both commercial and industrial temperature ranges. Pricing starts at $5.95 each for the LTC1588 and $9.95 each for the LTC1589 in 1,000-piece quantities.
Summary of Features: LTC1588 & LTC1589
LTC1588 - Monotonic 12-Bit DAC
LTC1589 - Monotonic 14-Bit DAC
Six Programmable Output Ranges
- Unipolar Mode: 0V to 5V, 0V to 10V
- Bipolar Mode: ±2.5V, ±5V, ±10V, -2.5V to 7.5V
INL and DNL: ±1LSB
Pin for Pin Family Allowing Easy Upgrade to 16-Bits (LTC1592)
Glitch Impulse<2nV-s
Power-On Reset to 0V and Asynchronous Clear to 0V
3-Wire SPI Serial Interface
16-pin SSOP Package
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators,power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequencydevices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.
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