1FEATURES

2• True Differential Inputs

• Ensured performance from 500 kSPS to 1

MSPS

• External Reference

• Wide Input Common-Mode Voltage Range

• SPI™/QSPI™/MICROWIRE/DSP Compatible

Serial Interface

APPLICATIONS

• Automotive Navigation

• Portable Systems

• Medical Instruments

• Instrumentation and Control Systems

• Motor Control

• Direct Sensor Interface

KEY SPECIFICATIONS

• Conversion Rate: 500 kSPS to 1 MSPS

• INL: ± 0.95 LSB (Max)

• DNL: ±0.95 LSB (Max)

• Offset Error: ±3.0 LSB (Max)

• Gain Error: ±6.5 LSB (Max)

• SINAD: 69.5 db (Min)

• Power Consumption at VA = 5V

– Active, 1 MSPS: 11.5 mW (Typ)

– Active, 500 kSPS: 9.0 mW (Typ)

– Power-Down: 1.5 μW (Typ)

DESCRIPTION

The ADC121S705 is a 12-bit, 500 kSPS to 1 MSPS

sampling Analog-to-Digital (A/D) converter that

features a fully differential, high impedance analog

input and an external reference. The reference

voltage can be varied from 1.0V to VA, with a

corresponding resolution between 244μV and VA

divided by 4096.

The output serial data is binary 2's complement and

is compatible with several standards, such as SPI™,

QSPI™, MICROWIRE, and many common DSP

serial interfaces. The differential input, low power

consumption, and small size make the ADC121S705

ideal for direct connection to transducers in battery

operated systems or remote data acquisition

applications.

Operating from a single 5V supply, the supply current when operating at 1 MSPS is typically 2.3 mA. The

supply current drops down to 0.3 μA typically when

the ADC121S705 enters power-down mode. The

ADC121S705 is available in the VSSOP-8 package.

Operation is ensured over the industrial temperature

range of −40°C to +105°C and clock rates of 8 MHz

to 16 MHz.