Linear Technology unveils LTC2301 and LTC2305 ADCs
A Linear Technology Corp product story
Edited by the Electronicstalk editorial team Mar 12, 2009
Linear Technology has introduced the LTC2301 and the LTC2305: a pair of one- to two-channel 12-bit analogue-to-digital converters (ADCs).
The ADCs communicate via an I2C-compatible two-wire interface and dissipate just 1.5MW at a 1ksps output rate.
Offered in pin-compatible 4mm x 3mm DFN and MSOP packages, the LTC2301 measures a single differential input, while the LTC2305 digitises two single-ended inputs.
Both ADCs are claimed to offer guaranteed specifications over the automotive/H-grade temperature range of -40C to +125C in the MSOP package.
The LTC2301 and the LTC2305 are suitable for automotive sensing, power and temperature measurements, as well as space-constrained designs that require I2C communication.
These ADCs join the previously released eight-channel LTC2309, offering a complete family of software-compatible one-, two- and eight-channel 12-bit I2C successive approximation register (SAR) ADCs that operate from a single 5V supply.
All three ADCs offer an internal reference and a low-power shutdown mode that reduces power dissipation to 35uW.
According to the company, the LTC2301 and the LTC2305 achieve excellent DC specifications, including +/-1LSB INL and DNL, +/-2mV(max) zero-scale error and +/-1LSB(max) full-scale error.
The LTC2301 and the LTC2305 are also said to excel when digitising AC input signals, achieving 73dB SINAD and -88dB THD at 1KHz.
The ADCs are capable of I2C data transfers up to 400KHz, allowing for throughput rates up to 14ksps.
Data can be transferred via 3V or 5V logic.
The ADCs include two address select pins that can be tied low, high or left floating, allowing selection of any of nine I2C addresses.
This is suitable for applications that require measurement of multiple channels, as designers can easily communicate with more than one LTC2301/LTC2305 ADC in parallel.
The LTC2301 and the LTC2305 are now available in commercial, industrial and automotive temperature grades.
Pricing begins at USD1.95 (GBP1.41) for 1,000-piece quantities.
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