ADS7828E/250

Analog To Digital Converters (ADC) Overview

The ADS7828E/250 is a 12-bit successive approximation register (SAR) analog-to-digital converter featuring an internal multiplexer for eight single-ended or four differential input channels. It operates with a sampling rate of 50 kSPS and supports I2C serial interface communication. The device functions on a single supply voltage ranging from 2.7 V to 5.25 V, consuming 675 µW at 3 V. Key performance metrics include a signal-to-noise ratio of 72 dB, differential nonlinearity of ±1 LSB, and integral nonlinearity of ±2 LSB. It is housed in a 16-TSSOP package and operates within a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates an 8-channel multiplexer allowing flexible configuration for single-ended or pseudo-differential inputs.
• Includes an internal reference voltage source to reduce external component count and board space.
• Supports standard and fast-mode I2C communication protocols for simplified digital interfacing.
• Features automatic power-down modes to minimize energy consumption during idle periods.

Analog To Digital Converters (ADC) Applications

• Battery-powered portable instrumentation and metering devices
• Industrial process control systems requiring multi-channel data acquisition
• Medical monitoring equipment with low-power constraints
• Temperature, pressure, and light intensity sensor interfaces

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'E/250' against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with system voltage levels and I2C bus speeds before integration. Check for RoHS compliance status and moisture sensitivity level requirements relevant to your assembly process.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a balance of moderate resolution and low power consumption is required for multi-channel sensing. The integrated multiplexer simplifies circuit design compared to discrete solutions. Consider the 50 kSPS limit if higher throughput is needed, or evaluate alternative packages if pin count constraints differ.

Analog To Digital Converters (ADC) Part Context

This part belongs to the Texas Instruments ADS782x family of micro-power ADCs. It shares architectural similarities with models like the ADS7823 and ADS7824 but offers eight channels instead of fewer. The E/250 designation typically indicates a specific packaging and reel configuration within the broader ADS7828 product line.

Analog To Digital Converters (ADC) Replacement Considerations

Direct substitutes within the same family include the ADS7828IDR or ADS7828IPWR, which may differ only in packaging style such as SOIC or QFN. Verify that any replacement maintains the 16-pin form factor and I2C interface compatibility for direct pin-for-pin interchangeability.

Analog To Digital Converters (ADC) FAQ

Can the ADS7828 measure negative voltages directly?

No, the ADS7828 accepts input voltages between ground and the reference voltage. Measuring negative voltages requires an external signal conditioning circuit, such as an op-amp inverter, to shift the voltage into the positive input range.

What is the maximum I2C clock speed supported?

The device supports standard mode (up to 100 kHz) and fast mode (up to 400 kHz) I2C communication protocols.

How does the internal reference affect accuracy?

The internal reference provides convenience by reducing external components, but its stability depends on the supply voltage. For highest precision, an external low-noise reference can be used instead.