Analog-to-Digital Converter eliminates need for PGA.
Share:
Press Release Summary:
Offered in 10-pin MSOP package, low noise (1.45 µVRMS) LTC2433-1 offers 16-bit performance over reference range of 100 mV to 5 V. Its 100 mV reference resolves differential input signal of ±50 mV to 16-bits. Product performs transparent offset and FS calibration on every conversion to provide 20 µV offset error, 1.25 LSB FS error, 1.25 LSB integral non-linearity error, and transition noise less than 0.02 LSB. It utilizes no latency architecture that allows single cycle settling.
Original Press Release:
Low Cost, Low Noise 16-Bit No Latency Delta Sigma(TM) ADC Eliminates Need for PGA
MILPITAS, CA - July 30, 2003 - Linear Technology introduces the LTC2433-1 a low noise, low cost, 16-bit Analog-to-Digital Converter (ADC). The LTC2433-1 offers exceptional noise performance of 1.45uVRMS, enabling 16-bit performance over a wide reference range of 100mV to 5V. A 100mV reference resolves a differential input signal of ±50mV to 16-bits without the need of a PGA, allowing direct digitization of many sensors. In a 10-pin MSOP package less than half the size of an SO-8, the LTC2433-1 can fit within the shell of a sensor or transducer. The LTC2433-1 is not only small and low noise, but also very accurate and easy to use.
The LTC2433-1 performs transparent offset and full-scale calibration on every conversion to provide 20uV (Max) offset error, 1.25LSB (Max) full-scale error, 1.25LSB (Max) integral non-linearity (INL) error, and transition noise less than 0.02LSB. It has a proprietary no latency architecture that allows single cycle settling. This avoids the need to discard data until the digital filter has settled, as required with other high resolution ADCs. Transparent calibration and single cycle settling dramatically simplify system software.
A highly accurate on-chip oscillator eliminates the need for costly external frequency setting components such as crystals or external clock sources. The filter rejects line frequencies to 87dB and offers simultaneous 50Hz/60Hz rejection. An external clock source can be used to reject other frequencies or increase the output rate. The external clock feature allows the LTC2433-1 to output data as fast as 100Hz with 16-ENOBs (Effective Number of Bits).
Offered in the 10-pin MSOP, the LTC2433-1 is available in both commercial and industrial temperature ranges. Pricing begins at $1.95 each in 1,000-piece quantities.
Summary of Features: LTC2433-1
16-Bit resolution with Input Signals down to ±50mV
High Accuracy INL: 1.25LSB (Max)
High Accuracy DNL: 16-Bit Resolution with No Missing Codes
Low Noise: 1.45uV
Very Low Transition Noise: <0.02LSB
10-Pin MSOP Package: Small 16-Bit ADC with Differential Inputs
Easy to Use: No Status Registers or Configuration Registers
On-Chip Oscillator: No External Crystals or Oscillators Necessary
No Calibration Required: Automatic, Transparent Offset/Full-Scale Calibration
Simultaneous 50Hz/60Hz Notch Frequency Filter
Superior Rejection: 87dB Rejection of Line Frequencies
Flexible Reference Input: VREF can span 0.1V to VCC
Low Supply Current: 200uA during Conversion and 4uA during Shutdown
Wide Supply Range: 2.7V to 5.5V
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators,power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequencydevices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.
READER SERVICE: Call toll-free 1-800-4-LINEAR (for literature only), or go to the company's web site: www.linear.com
Note: LT, AND LTC are registered trademarks of Linear Technology Corp.
