12- & 14-Bit SoftSpan DACs Feature Software Programmable Output Ranges & Simplified System Design
Milpitas, Calif.---Linear Technology introduces the LTC1588 and LTC1589, the first 12- and 14-bit current output DACs with a software programmable output range. The SoftSpan DACs are easily programmed with a 3-wire serial interface to operate in any one of six possible output ranges: two unipolar (0 V to 5 V, 0 V to 10 V) and four bipolar (±2.5 V, ±5 V, ±10 V and -2.5 V to 7.5 V). All output spans have ultra-precise specifications of ±1 LSB INL, ±1 LSB 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 5 V reference, a dual op amp and a feedback capacitor.
The LTC1588 and LTC1589 have ultra-low 2 nV-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: 0 V to 5 V, 0 V to 10 V
- Bipolar Mode: ±2.5 V, +±5 V, ±10 V, -2.5V to 7.5V
INL and DNL: ±1 LSB
Pin for Pin Family Allowing Easy Upgrade to 16-Bits (LTC1592)
Glitch Impulse <2nV-s
Power-On Reset to 0 V and Asynchronous Clear to 0 V
3-Wire SPI Serial Interface
16-pin SSOP Package
Linear Technology, 1630 McCarthy Boulevard, Milpitas, Calif. 95035-7417, USA. Phone: (408) 432-1900. Web: http://www.linear.com.