ADC08161CIWM

Analog To Digital Converters (ADC) Overview

The Texas Instruments ADC08161CIWM is an obsolete 8-bit analog-to-digital converter featuring a patented multi-step flash architecture. It integrates an internal sample-and-hold circuit and a 2.5V bandgap reference, eliminating the need for external clocking or additional S/H components. The device operates on a single +5V supply with a maximum power dissipation of 100 mW. Key electrical specifications include a typical full-power bandwidth of 300 kHz, a minimum throughput rate of 1.5 MHz, and a conversion time of 560 ns in WR-RD mode. Total unadjusted error is specified at ±1 LSB maximum across the operating temperature range.

Analog To Digital Converters (ADC) Feature Summary

• Multi-step A/D conversion technique providing 500 ns typical conversion time without external clock
• Integrated 2.5V bandgap reference and internal sample-and-hold function
• Microprocessor-compatible interface supporting RD Mode and WR-RD Mode
• Total unadjusted error of ±1 LSB maximum over full temperature range

Analog To Digital Converters (ADC) Applications

• Mobile telecommunications systems
• Hard-disk drive controllers
• High-speed data acquisition systems

Analog To Digital Converters (ADC) Procurement Notes

The ADC08161CIWM is classified as obsolete by Texas Instruments but remains on Lifetime Buy status. Designers must verify current availability through authorized distributors, as production volumes are limited. This component is not recommended for new designs; alternative modern ADCs should be evaluated for future projects to ensure long-term supply chain stability.

Analog To Digital Converters (ADC) Selection Notes

Select this part only for legacy system maintenance where the specific multi-step flash timing and microprocessor interface are required. Ensure the analog source impedance is below 500 Ω to maintain accuracy during the 100 ns sampling window. Verify that the application can accommodate the +5V nominal supply voltage and the resulting 100 mW power dissipation within the thermal constraints of the SOIC package.

Analog To Digital Converters (ADC) Part Context

The ADC08161 belongs to the National Semiconductor (now Texas Instruments) family of 8-bit high-speed converters. The 'CIWM' suffix denotes the commercial temperature range (-40°C to +85°C) and the Wide-Body Small-Outline (SOIC) package. This device was designed to bridge the gap between low-resolution parallel ADCs and slower serial interfaces, offering direct memory-mapped access capabilities.

Analog To Digital Converters (ADC) Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. Due to the obsolete status, designers should consult Texas Instruments for current replacement recommendations or evaluate generic 8-bit SAR ADCs with similar throughput and interface requirements.

Analog To Digital Converters (ADC) FAQ

How does the ADC08161 achieve fast conversion times without an external clock?

It utilizes a patented multi-step A/D conversion technique that internally generates the necessary timing signals, allowing for a typical conversion time of 500 ns without external clocking.

What is the purpose of the MODE pin?

The MODE pin selects the digital interface mode. Connecting it to logic low enables RD Mode, while connecting it to logic high enables WR-RD Mode, determining how conversions are initiated and data is read.

Can the ADC08161 handle differential input signals directly?

No, the VIN pin is single-ended. However, the fully differential VREF inputs allow for ratiometric operation or offset compensation, which can facilitate differential measurement configurations when used with external circuitry.