Dual low-power high-speed op-amp drives ADSL upstream
26 Jan 2000
News
Multitech Electronic Corporation
Linear Technology's LTC1402, a 2,2 MSa/s analog-to-digital converter (ADC) features a high-speed serial interface optimised for today's DSP and serial ports. The 80 MHz sample-and-hold bandwidth combined with 72 dB SINAD and 89 dB THD performance makes this device suitable for undersampled or narrowband communications applications. 2,2 MSa/s rate, DC performance of ±0,35 LSB INL and DNL and glueless DSP interface make the LTC1402 ideal for high-speed DSP-based data acquisition.
The LTC1402 offers input ranges of 0-4,096 V or ±2,048 V, from a single 5 V or ±5 V supplies, simplifying the connection to any signal source. In addition, a separate output logic supply allows direct connection to low voltage logic systems, such as DSPs or FPGAs with 3,3 V I/O.
The LTC1402 dissipates only 90 mW at its maximum sampling rate. It offers Nap mode that keeps the internal reference active between conversions for instant wake-up (15 mW) and a shutdown mode where the power dissipation drops to 10 µW. The low power, serial interface and narrow 16 pin SSOP package (fits in an SO-8 footprint) make this device well suited to portable data acquisition systems.
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