Signal Processing Technologies Inc. (SPT) has added a low-cost, low-power device to its line of analog-to-digital converters that consumes less than one-third the power of other standard 12-bit ADCs.
The SPT7935 is believed to be the first 12-bit, 20-megasample/s (MSPS) ADC designed to operate from a 3.3-V power supply, a feature which contributes to the device's low, 79-mW power dissipation, said Rick Mintle, director of marketing for Colorado Springs, Colo.-based SPT.
"The lower power dissipation of the SPT7935 reduces overall heat and system power, resulting in system power-supply cost savings that are very important for those multi-channel applications where every milliwatt of power savings is multiplied several fold," Mintle said.
The 3.3-V power supply provides an easy interface to the latest generation of ASICs and DSPs, according to SPT. The device also features on-chip track-and-hold to enhance dynamic performance without the need for external components.
The SPT7935 is suitable for various applications, including video transmission, digital copiers, medical ultrasound, handheld instrumentation, and digital radio.
The SPT7935 is available now, in a 44-lead TQFP, and is priced at $9.90 in quantities of 1,000.
SPT has also introduced the SPT9110, a track-and-hold amplifier (THA) that can achieve 100 MSPS, and can operate as a single-ended amplifier or in full configuration as a single-to-differential THA.
The SPT9110 operates from a 5-V supply, and has a 1.5- to 3.5-V input range and an inverting op amp. It consumes 150 mW of power in single-to-differential mode, and 75 mW in a single-ended mode.
The device has separate power-supply pins for the inverter and reference, so that each can be optionally powered up and operated independently.
The SPT9110 will improve the dynamic performance of ADCs in test instrumentation, RF demodulation, digital sampling oscilloscopes, and spectrum analyzer applications, Mintle said.
In a 28-lead SOIC package, the SPT9110 amplifier is available now for $23 in 1,000s.