1FEATURES

2• True Differential Inputs

• Guaranteed Performance from 50 kSPS to 250

kSPS

• External Reference

• Zero-Power Track Mode

• Wide Input Common-Mode Voltage Range

• Operating Temperature Range of −40°C to

+85°C

• 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: 50 kSPS to 250 kSPS

• INL: ± 0.95 LSB (Max)

• DNL: ± 0.95 LSB (Max)

• SNR: 82 dBc (Max)

• THD: -90 dBc (Typ)

• ENOB: 13.3 Bits(Min)

• Power Consumption:

– 200 kSPS, 3V: 2.0 mW (Typ)

– 250 kSPS, 5V: 4.8 mW (Typ)

– Power-Down, 3V: 4 μW (Typ)

– Power-Down, 5V: 13 μW (Typ)

DESCRIPTION

The ADC141S626 is a 14-bit, 50 kSPS to 250 kSPS sampling Analog-to-Digital (A/D) converter. The

converter is based on a successive-approximation

register (SAR) architecture where the differential

nature of the analog inputs is maintained from the

internal sample-and-hold circuits throughout the A/D converter to provide excellent common-mode signal

rejection. The ADC141S626 features an external

reference that can be varied from 1.0V to VA. It also

features a zero-power track mode where the ADC is

consuming the minimum amount of supply current

while the internal sampling capacitor is tracking the

applied analog input voltage.

The 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 conversion result is clocked out

by the serial clock input and is the result of the

conversion currently in progress; thus, ADC141S626

has no latency.

The ADC141S626 may be operated with independent

analog (VA) and digital input/output (VIO) supplies. VA and VIO can range from 2.7V to 5.5V and can be set

independent of each other. This allows a user to

maximize performance and minimize power

consumption by operating the analog portion of the

ADC at a VA of 5V while communicating with a 3V

controller on the digital side. With a 3V source, the

power consumption when operating at 200 kSPS is

2.0 mW. With a 5V source, the power consumption

when operating at 250 kSPS is 4.8 mW. The power

consumption drops down to 4 μW and 13 μW

respectively when the ADC141S626 enters

acquisition (power-down) mode. The differential input, low power consumption, and small size make the

ADC141S626 ideal for direct connection to bridge

sensors and transducers in battery operated systems

or remote data acquisition applications.

Operation is guaranteed over the temperature range

of −40°C to +85°C and clock rates of 0.9 MHz to 4.5

MHz. The ADC141S626 is available in a 10-lead

VSSOP package.