POWER AND LINEAR IC SOLUTIONS

Reliable Solutions for Rugged Environments

The latest rugged ADCs and crystal oscillators from Linear Technology expand the company’s range of analogue ICs for harsh environments.

Today’s military, aerospace, automotive and industrial high reliability systems continue to require semiconductor devices with higher performance, lower power and improved integration. To meet the demands of radiation, high temperature and high voltage environments, Linear Technology continues to add products to its broad line of high performance analogue ICs that simplify system design and perform reliably in harsh environments.

Linear Technology realises that the cost of field failures is many orders of magnitude more than initial component cost, which is why the company’s standard is error free products and error free performance. Linear states its goal as zero defects and 100% customer satisfaction with the best quality, on-time delivery and service – attributes that are supported by the fact that the company has been recognised with quality and service awards that include:

• Jan Microcircuit Certification (QPL) Class S by DESC
• ISO9001 Certification
• TS16949 Certification
• QML Certified by DSCC
• QS9000 Certification
• ISO14001 Certification
• STACK International

Linear continues to invest in new technologies and processes to improve product quality and reliability, and this is reflected in its latest industrial grade ADCs and rugged silicon oscillators.

Rugged Industrial Grade ADCs

Linear Technology offers a broad line of high performance rugged ADCs that simplify system design with parameters fully guaranteed over the -40°C to +85°C temperature range.



The LTC1859 is an 8-channel, low power, 16-bit, 100ksps SoftSpan™ ADC that can be software programmed for different input spans and operates from a single 5V supply. The 8-channel multiplexer can be programmed for single-ended inputs or pairs of differential inputs or combinations of both. In addition, all channels are fault protected to ±25V. A fault condition on any channel will not affect the conversion result of the selected channel.

Configurable and Wide Input Span ADCS

Part Number	Bits	#Channels	Speed (ksps)	Input Span	Package
LTC1859 SoftSpan	16	8	100	0V to 5V, 0V to 10V, ±5V or ±10V	SSOP-28
LTC1605	16	1	100	±10V	PDIP-28 SSOP-28 SW-28
LTC1606	16	1	250	±10V	PDIP-28 SSOP-28 SW-28
LTC1609	16	1	200	0V to 5V, 0V to 10V, 0V to 4V, ±10, ±5V or ±3.3V	SSOP-28 SW-28
LTC1858 SoftSpan	14	8	100	0V to 5V, 0V to 10V, ±5V or ±10V	SSOP-28
LTC1857 SoftSpan	12	8	100	0V to 5V, 0V to 10V, ±5V or ±10V	SSOP-28

An onboard high performance sample-and-hold and precision reference minimises external components. The internal clock is trimmed for 5μs maximum conversion time and the sampling rate is guaranteed at 100ksps.

Additional Highlights of the LTC1859 include:

• ±3LSB INL
• Power dissipation: 40mW (typ)
• SPI/MICROWIRE™ compatible serial I/O
• Power shutdown: nap and sleep modes
• Signal-to-noise ratio: 87dB (typ)
• Packaged in SSOP-28

Rugged Silicon Oscillators

Vibrations and high temperature often prevent the use of crystal oscillators and ceramic resonators. Due to their mechanical operation, crystals and ceramic resonators wear out and physical impacts can induce errors in the output frequency or phase.

Selected Silicon Oscillators

	Device	Frequency Output	Accuracy	Package
Fixed Frequency	LTC6905-133	133, 67.7 or 33.3MHz	1%	SOT23-5
	LTC6905-100	100, 50 or 25MHz	1%	SOT23-5
	LTC6905-96	96, 48 or 24MHz	1%	SOT23-5
	LTC6905-80	80, 40 or 20MHz	1%	SOT23-5
Resistor Set	LTC1799	1kHz to 33MHz	1.5%	SOT23-5
	LTC6900	1kHz to 20 MHz	1.5%
	LTC6902	5kHz to 20MHz	1.5%	MS-10
	LTC6905	17MHz to 170MHz	1.4%	SOT23-5
	LTC6906	10kHz to 1 MHz	0.5%	SOT23-6
	LTC6907	40kHz to 4MHz	0.5%	SOT23-6
Serial Interface	LTC6903	1kHz to 68MHz (0.1% resolution)	1.1%	MS-8
	LTC6904	1kHz to 68MHz (0.1% resolution)	1.1%	MS-8

Silicon oscillators do not rely on piezoelectric resonating elements and are not plagued by the poor performance of RC-based circuits. Standard silicon fabrication and assembly means inherent immunity to shock, vibration and wearout. Start up is consistent and fast.

These devices operate with a single 2.7V to 6V power supply and operate over a temperature range of -40°C to +125°C. Small footprint, wide operating range and low drift enable silicon oscillators to be used directly at the point of measurement.

For further information, including a copy of the Industrial Signal Chain Brochure, please click here