ADS7800KUE4

Analog To Digital Converters (ADC) Overview

The ADS7800KUE4 is a 12-bit successive approximation analog-to-digital converter manufactured by Texas Instruments. It operates with a throughput rate of 333 kS/s and features an internal sample/hold, reference, clock, and three-state outputs. The device supports standard ±10V and ±5V input ranges via selectable pins. It requires a +5V digital/analog supply and a –12V or –15V negative supply. Key electrical specifications include a maximum conversion time of 2.7 µs, integral linearity error of ±1/2 LSB, differential linearity error of ±3/4 LSB, and a signal-to-noise ratio of 73 dB. It is housed in a 24-lead SOIC package.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a complete 12-bit SAR ADC with internal sample/hold, reference, and clock circuits.
• Provides industry-standard bipolar input ranges of ±10V or ±5V using precision laser-trimmed scaling resistors.
• Features three-state parallel output drivers compatible with TTL/CMOS logic levels.
• Ensures DC performance over temperature with no missing codes and specified linearity errors.

Analog To Digital Converters (ADC) Applications

• Microprocessor-based data acquisition systems requiring parallel interface.
• Industrial process control applications utilizing standard voltage input ranges.
• Stand-alone operation in dedicated input port systems without full bus interface capability.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'KU' corresponds to the commercial grade (0°C to +70°C) rather than the extended temperature grade ('AH' or 'BH'). Confirm the package type matches the required PCB footprint for the 24-lead SOIC. Check for RoHS compliance status as indicated in the ordering information. Ensure power supply requirements align with the +5V and –12V/–15V specifications before integration.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a high-speed 12-bit resolution with a 333 kS/s throughput is required. It is suitable for applications needing direct ±10V or ±5V inputs without external attenuation circuitry. Consider the internal reference and clock capabilities if board space for external components is limited. Evaluate the parallel interface requirement against available microprocessor data buses.

Analog To Digital Converters (ADC) Part Context

The ADS7800 series includes variants such as the ADS7800JP/JU/AH and ADS7800KP/KU/BH. The 'K' designation typically indicates the commercial temperature range, while 'J' may refer to other grades. The 'U' suffix denotes the SOIC package. Other packages include plastic DIP and side-braze hermetic ceramic options. The datasheet specifies performance across different temperature ranges for these variants.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Verify pin compatibility and electrical specifications carefully if considering alternative ADCs from other manufacturers.

Analog To Digital Converters (ADC) FAQ

How is the input range selected between ±10V and ±5V?

Connect the analog signal to Pin 1 (IN1) for the ±10V range or Pin 2 (IN2) for the ±5V range. The unused input pin must be connected to ground.

What is the function of the BUSY output pin?

The BUSY output goes LOW during the conversion period and rises HIGH when the conversion is complete and data is valid. It keeps the data outputs in a Hi-Z state during conversion.

Can the ADS7800 operate in a stand-alone mode?

Yes, by connecting CS and HBE to GND and controlling only the R/C input, the device can operate in a stand-alone mode where conversions are initiated by pulses on R/C.