ADC122S655

If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

Analog Supply Voltage V_A                       −0.3V to 6.5V
Voltage on Any Pin to GND                      −0.3V to (V_A +0.3V)
Input Current at Any Pin (Note 3)           ±10 mA
Package Input Current (Note 3)              ±50 mA
Power Consumption at T_A = 25            See (Note 4)
ESD Susceptibility (Note 5)
Human Body Model                                  2500V
Machine Model                                         250V
Charge Device Model                               1000V
Junction Temperature                              +150
Storage Temperature                             −65 to +150

The ADC122S655 is a dual 12-bit, 200 kSPS to 500 kSPS simultaneous sampling Analog-to-Digital (A/D) converter. The analog inputs on both channels are sampled simultaneously to preserve their relative phase information to each other. The converter is based on a successive-approximation register architecture where the differential nature of the analog inputs is maintained from the internal track-and-hold circuits throughout the A/D converter to provide excellent common-mode signal rejection.

The ADC122S655 features an external reference that can be varied from 1.0V to VA. The ADC122S655's serial data output is binary 2's complement and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™, and many common DSP serial interfaces. The serial clock (SCLK) and chip select bar (CS) are shared by both channels.

Operating from a single 5V analog supply and a reference voltage of 2.5V, the total power consumption while operating at 500 kSPS is typically 11 mW. With the ADC122S655 operating in power-down mode, the power consumption reduces to 3 W. The differential input, low power consumption, and small size make the ADC122S655 ideal for direct connection to sensors in motor control applications.

Operation is guaranteed over the industrial temperature range of −40 to +105 and clock rates of 6.4 MHz to 16 MHz. The ADC122S655 is available in a 10-lead MSOP package.