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12-Bit, 1-/2-Channel 500ksps SAR ADCs Offer Compact Solution Size and Low Power

(PresseBox) (Milpitas,CA, ) Linear Technology Corporation introduces the LTC2302 and LTC2306, pin- and software-compatible 1-/2-channel 12-bit analog-to-digital converters (ADC). These ADCs communicate via an SPI-compatible serial interface at output rates up to 500ksps. The LTC2302 measures a single differential input channel, suitable for measuring bridge sensors. The LTC2306 includes an internal multiplexer and measures 2 single-ended or 1 differential input channel. Both the LTC2302 and LTC2306 are software-compatible with the LTC2308, a 12-bit, 500ksps, 8-channel ADC, making it easy to port code between applications measuring 1, 2 or 8 analog channels.

The LTC2302/LTC2306 operate from a single 5V supply, dissipating only 15mW at the 500ksps output rate. Power dissipation decreases dramatically at slower output rates, dissipating only 70uW at 1ksps. For further power savings, a sleep mode reduces the power to 35uW. With their low power and tiny 3mm x 3mm DFN-10 package, the LTC2302/LTC2306 are ideal for high-speed data acquisition and portable designs.

The LTC2302/LTC2306 achieve excellent DC specifications, including ±1LSB (max) INL and DNL. With a fully differential sample-and-hold circuit to reduce common mode noise, these ADCs also excel when digitizing AC input signals, measuring 73dB SINAD and -88dB THD at 10kHz. A separate digital output supply voltage (OVDD) allows users to configure the serial data output for 3V or 5V logic.

The LTC2302 and LTC2306 are available today in both commercial and industrial temperature grades.

Summary of Features LTC2302/LTC2306

- 500ksps Conversion Rate
- Low Power Dissipation:
o 15mW at 500ksps
o 70uW at 1ksps
o 35uW Sleep Mode
- 1 Differential Input (LTC2302)/2 Single-Ended Inputs (LTC2306)
- 5V Single Supply Operation
- Tiny 3mm x 3mm DFN-10 Package
- 73dB SINAD at 10kHz
- 3-Wire SPI-Compatible Serial Interface
- Software-Selectable Unipolar or Bipolar Input Ranges
- Separate OVDD Digital Output Voltage Supply: 2.7V to 5.5V


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, uModule(TM) 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. For more information, visit

LT, LTC, LTM, Burst Mode and are registered trademarks and uModule is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.