I2C SAR ADCs are specified over temperatures to +125°C.
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Press Release Summary:
Supplied in 4 x 3 mm DFN and MSOP packages, 1-channel LTC2301 and two-channel LTC2305 are 12-bit ADCs that communicate via I²C-compatible, 2-wire interface and dissipate 1.5 mW at 1 ksps output rate. LTC2301 measures single differential input, while LTC2305 digitizes 2 single-ended inputs. Both operate from 5 V supply and include 2 address select pins that can be tied low, high, or left floating. Internal reference and low-power shutdown mode reduce power dissipation to 35 µW.
Original Press Release:
12-Bit, 1-/2-Channel I2C SAR ADCs Guaranteed up to +125°C
MILPITAS, CA - September 8, 2008 - Linear Technology Corporation introduces the LTC2301/LTC2305, a pair of 1-/2-channel 12-bit analog-to-digital converters (ADCs) that communicate via an I2C-compatible 2-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 digitizes two single-ended inputs. Both ADCs offer guaranteed specifications over the automotive/H-grade temperature range of -40°C to +125°C in the MSOP package. The LTC2301/LTC2305 are ideal for automotive sensing, power and temperature measurements, as well as space-constrained designs that require I2C communication.
These ADCs join the previously released 8-channel LTC2309, offering a complete family of software-compatible 1-/2-/8-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.
The LTC2301/LTC2305 achieve excellent DC specifications, including +/-1LSB INL and DNL, +/-2mV(max) zero-scale error and +/-1LSB(max) full-scale error. The LTC2301/LTC2305 also excel when digitizing AC input signals, achieving 73dB SINAD and -88dB THD at 1kHz.
The LTC2301/LTC2305 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. These ADCs include two address select pins that can be tied low, high or left floating, allowing selection of any of nine unique I2C addresses. This is ideal 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 LTC2305 are available today in commercial, industrial and automotive temperature grades. Pricing begins at $1.95 for 1,000-piece quantities.
12-Bit I2C ADC Family
Summary of Features: LTC2301/LTC2305
12-Bit Resolution
I2C-Compatible, 2-Wire Interface
Pin-Compatible MSOP and 4mm x 3mm DFN Packages:
o1 Differential Input (LTC2301)
o2 Single-Ended Inputs (LTC2305)
Fast 1.3us Conversion Time
14ksps Throughput Rate
Low Power Dissipation:
o1.5mW at 1ksps, 35uW Sleep Mode
5V Analog Supply Operation, 3V or 5V Data Transfer
Internal Reference, Internal Conversion Clock
73dB SINAD at 1kHz
Two 3-State Address Select Pins Allow Nine Unique Addresses
12-Bit, I2C, 1-/2-channel SAR ADCs
About Linear Technology
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 www.linear.com.
LT, LTC and LTM are registered trademarks and uModule is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432-1900 ext. 2233
ddickinson@linear.com
