Speedy A/D convertor has six appeal

Six-input ADC is designed for multiphase power measurement, multiphase motor control, data acquisition systems and uninterruptible power supplies.

The LTC2351-14 is a 1.5Msample/s low-power analogue-to-digital convertor (ADC) with six simultaneous sampling differential inputs.

Operating from a single 3.3V supply, power dissipation is typically 16.5mW.

The LTC2351-14 features six individual sample-and-hold amplifiers, a multiplexer and a single ADC making this device the ideal choice for multiphase power measurement, multiphase motor control, data acquisition systems and uninterruptible power supplies.

Packaged in a 32-pin (5 x 5mm) QFN, the LTC2351-14 allows the design of compact battery-powered portable data acquisition systems.

When the LTC2351-14 is not converting, power dissipation can be further reduced to 4.5mW in nap mode with the internal 2.5V reference remaining active, and to 12uW in Sleep mode, with all internal circuitry powered down.

The internal 2.5V reference can be overdriven with an external reference, up to the analogue supply voltage.

The LTC2351-14 uses three input-select lines to configure the number of differential inputs converted.

Thus, higher speeds are possible, from one differential input at 1.5Msample/s to six differential inputs at 250Ksample/s.

The six conversion results are delivered sequentially to a high speed DSP serial port via a three-wire interface.

This ADC also features a separate digital output power supply pin and a bipolar/unipolar input line to select +/-1.25V bipolar or 0 to 2.5V unipolar input ranges.

For lower resolution applications, Linear has also released the pin- and code-compatible 12bit LTC2351-12 ADC.

Both the LTC2351-14 and LTC2351-12 are available for commercial and industrial temperature ranges.

Pricing begins at US $9.45 each for the LTC2351-14 and US $6.95 each for the LTC2351-12, in 1000-piece quantities.

Back to top