MOUNTAIN VIEW, Calif. -- TelCom Semiconductor Inc. here introduced a couple of 1.8-volt, fully differential input 16-bit analog-to-digital converters with a two-wire digital interface for serial communications to microcontrollers.
The TC3400 and 3402 A/D converters consume less power and take up less board space than competing devices, according to the company. In fact, some of power management interface circuitry can be eliminated in system designs because these two devices offer lower quiescent power dissipation in smaller low-cost packages than other converters, said Don Ashley, TelCom manager for advanced products marketing.
The new devices use TelCom's 16-bit delta-sigma A/D converter core technology with low noise and fully differential multiplexer, Ashley said. The converters are being aimed at portable battery-operated equipment, handheld medical instruments, remote industrial process controllers, MP3 audio players, data loggers, digital panel meters and test and instrumentation equipment.
The TC3400 and TC3402 perform eight conversions per second at 16-bit resolution and can be adjusted up to 512 conversions per second at 10-bit resolution, said the Mountain View-based company. These devices provide serial communications with a system microcontrollers via TelCom's MicroPort digital interface. The TC3400 and TC3402 automatically enter sleep mode when not in use. The TC3400 features one differential input, while the TC3402 features four fully differential analog signal inputs with a built-in precision analog multiplexer.
The TC3400 is available in 8-pin SOIC and PDIP packages, while the TC3402 is housed in 16-pin PDIP and QSOP packages. The A/D converters are being sold through TelCom's distributors, with prices starting at $2.58 each in quantities of 1,000 for the TC3400 and $2.85 for the TC3402.