PCM1803ADBR

Texas Instruments PCM1803ADBR — 24‑bit, 96‑kHz Stereo Audio ADC (SSOP‑20)

The Texas Instruments PCM1803ADBR is a 24‑bit, 96‑kHz sampling, stereo delta‑sigma audio analog‑to‑digital converter designed for clean conversion of analog audio into a serial digital stream. Built on TI’s proven PCM1803A family, it integrates a serial (I2S‑compatible) audio output and single‑ended analog inputs in a compact 20‑pin SSOP package, making it a practical fit for consumer audio, sound cards, A/V equipment, and embedded audio capture designs.

Engineers value the PCM1803ADBR for its straightforward digital interface and accessible analog front end, while sourcing teams appreciate that it is an active, RoHS‑compliant device with a defined orderable code and tape‑and‑reel availability. Whether you’re refreshing an existing product or launching a new platform, this converter provides a balanced combination of performance, simplicity, and manufacturability.

At‑a‑Glance: Key Specifications

• Manufacturer/Brand: Texas Instruments
• Series: PCM1803A
• MPN: PCM1803ADBR
• Function: Stereo audio ADC (2 channels)
• Resolution: 24‑bit
• Maximum sampling rate: 96 kS/s
• Conversion architecture: Delta‑Sigma
• Audio digital interface: Serial (I2S‑compatible)
• Analog input type: Single‑ended
• Package: SSOP‑20 (TI package code “DB”)
• Orderable suffix: DBR (Tape & Reel)
• Mounting type: Surface mount
• Pin count: 20

Not specified in the provided data/datasheet excerpt:

• Operating temperature range
• Power consumption figures (active, idle, sleep)
• Detailed electrical characteristics (e.g., THD+N, SNR)

For any of the above, consult the Texas Instruments PCM1803A datasheet and product page linked in the Resources section.

What the PCM1803A Family Delivers

The Texas Instruments PCM1803A family targets mainstream digital audio capture where reliability, clarity, and integration ease matter more than exotic feature sets. The PCM1803ADBR variant distills the essentials:

• 24‑bit word length provides fine quantization for modern audio workflows.
• 96 kS/s maximum sampling rate covers common standards like 44.1 kHz, 48 kHz, and 96 kHz.
• A delta‑sigma modulator and digital decimation path (family architecture) emphasize audio linearity and out‑of‑band noise shaping typical of this class of converters.
• An I2S‑compatible serial output keeps glue logic minimal and firmware straightforward for MCUs, DSPs, and SoCs.
• Single‑ended inputs simplify analog front‑end requirements for many consumer and embedded designs.

The result is a dependable, easy‑to‑source stereo ADC that integrates smoothly with popular audio processors without overcomplicating the bill of materials or layout.

Applications and Use Cases

The PCM1803ADBR is well suited to audio digitization tasks across:

• Stereo audio capture and recording
• Consumer audio and A/V equipment
• Digital audio interfaces and sound cards

Practical examples include:

• Capturing line‑level sources for media recorders or streamers
• On‑board audio input for single‑board computers and embedded gateways
• Two‑channel input stages in mixers, audio accessories, or USB audio dongles
• Adding analog input capability to DSP‑based speakers, amplifiers, or receivers

Because the device supports up to 96 kS/s at 24‑bit, it aligns neatly with many production and prosumer audio chains while remaining cost‑ and assembly‑friendly for volume builds.

Design and Integration Notes

Digital audio interface (I2S)

The PCM1803ADBR outputs a serial audio stream compatible with I2S. This de‑facto standard simplifies connection to a variety of microcontrollers, DSPs, codecs, and SoCs. Typical considerations include matching word length (24‑bit), clock polarity/phase conventions, and frame alignment per the target host’s serial port. Since details vary by system, consult the host’s serial audio peripheral documentation alongside the TI datasheet to finalize bit clock, word select, and master clock relationships.

Analog front end and inputs

With single‑ended analog inputs, board designers can route from line‑level sources or preamplifier stages with fewer components than a fully differential chain. Good practice includes:

• Using an appropriate anti‑aliasing filter ahead of the ADC input
• Observing recommended input impedance and biasing from the datasheet
• Short, shielded or guarded traces for sensitive analog paths
• Segregating analog and digital return currents where possible

These steps help preserve audio integrity and minimize coupled digital noise.

Clocking and sample rates

The PCM1803ADBR supports sample rates up to 96 kS/s, enabling standard 44.1/48/96 kHz operation. Ensure your master clocking strategy provides the ratios required by the device and the downstream processor. Stable, low‑jitter clocks are beneficial for audio quality; placement of clock sources and clean power routing further supports conversion stability.

Power management

A power‑down mode is available, enabling system‑level energy savings during standby or when inputs are idle. Integrate this control into your firmware’s power‑state machine to reduce overall draw without sacrificing rapid wake‑up for user responsiveness. Exact current figures and timing should be verified in the TI datasheet.

PCB footprint and assembly

• Package: SSOP‑20 (TI package code DB)
• Orderable: PCM1803ADBR (DBR indicates Tape & Reel)
• Mounting: Surface mount

The SSOP‑20 package is accessible for mainstream SMT lines. Observe pad sizing and solder mask recommendations, maintain clear analog routing around the input pins, and position local decoupling capacitors close to the device’s supply pins as recommended by TI.

Why Choose the Texas Instruments PCM1803ADBR?

• Proven stereo capture path for 24‑bit/96‑kHz workflows without unnecessary configuration complexity
• I2S output integrates readily with audio MCUs and DSPs, reducing firmware and validation effort
• Compact SSOP‑20 package suits dense or cost‑optimized boards
• Active lifecycle and RoHS compliance support long‑term sourcing strategies
• Tape‑and‑reel availability (DBR) streamlines automated assembly for production volumes

For teams balancing audio fidelity with predictable sourcing and manufacturing, the PCM1803ADBR strikes a practical equilibrium.

Ordering, Packaging, and Identification

• Part number (MPN): PCM1803ADBR
• Brand/Manufacturer: Texas Instruments
• Series: PCM1803A
• Package: SSOP‑20
• TI package code: DB
• Orderable suffix: DBR (Tape & Reel)
• Pin count: 20
• Mounting type: Surface mount

Notes:

• The “DB” code identifies the SSOP‑20 mechanical outline used by TI.
• The trailing “R” in PCM1803ADBR designates Tape & Reel packaging for automated pick‑and‑place.

Lifecycle, Supply, and Compliance

• Lifecycle status: Active (per Texas Instruments product page)
• RoHS/Environmental: RoHS Compliant (per TI listing)
• Availability: Stock status varies by distributor; check authorized channels for current inventory and lead times
• Approved alternates/replacements: Not specified in the provided data

If a drop‑in substitute is required, review TI’s broader audio ADC portfolio or consult TI support for guidance. Always validate pinout and electrical compatibility before considering any alternate.

Specifications Summary

• Resolution: 24‑bit
• Max sampling rate: 96 kS/s
• Channels: 2 (Stereo)
• Architecture: Delta‑Sigma
• Digital audio interface: Serial (I2S‑compatible)
• Analog input type: Single‑Ended
• Package / Case: SSOP‑20 (DB)
• Orderable suffix: DBR (Tape & Reel)
• Mounting type: Surface Mount
• Pin count: 20

Not specified in the provided data:

• Absolute maximum/operating voltages
• Reference architecture and levels
• THD+N / SNR / dynamic range
• Digital filter options and de‑emphasis
• Operating temperature range

Refer to the TI PCM1803A datasheet for detailed electrical specifications and timing diagrams.

Implementation Tips for a Clean Design

• Partition the board to keep analog and digital domains distinct; route I2S lines away from the analog inputs.
• Use local decoupling close to each power pin; follow TI’s recommended values and placement from the datasheet.
• Provide solid ground reference for the analog input path; avoid ground loops between input connectors and the ADC ground.
• Validate clock quality (jitter and stability) across temperature and supply conditions representing your end use.
• Prototype with test points on I2S lines and inputs to simplify bring‑up and verification.

These generic best practices help extract consistent performance from the PCM1803ADBR without adding BOM cost or schedule risk.

FAQs

• Q: What package option is PCM1803ADBR?
  A: “DB” denotes 20‑pin SSOP; the trailing “R” indicates Tape & Reel packaging.

• Q: Does the Texas Instruments PCM1803A support I2S output?
  A: Yes. The PCM1803ADBR provides a serial audio output interface compatible with I2S.

• Q: What is the maximum sampling rate of the PCM1803ADBR?
  A: Up to 96 kS/s, suitable for 44.1 kHz, 48 kHz, and 96 kHz audio systems.

• Q: How many channels does the PCM1803ADBR support?
  A: Two channels (stereo).

• Q: What type of analog inputs does it use?
  A: Single‑ended analog inputs.

• Q: Is the PCM1803ADBR RoHS compliant?
  A: Yes, it is listed by Texas Instruments as RoHS compliant.

• Q: What is the lifecycle status?
  A: Active, according to the TI product page.

• Q: Are there specified power consumption figures or an operating temperature range in this summary?
  A: Not specified in the provided data. Consult the TI datasheet for exact electrical and environmental ratings.

Resources

• Product page: https://www.ti.com/product/PCM1803A
• Datasheet (PCM1803A): https://www.ti.com/lit/ds/symlink/pcm1803a.pdf

Summary

The Texas Instruments PCM1803ADBR is a practical, production‑ready choice for stereo audio digitization at up to 24‑bit/96‑kHz. Its I2S‑compatible interface and single‑ended inputs minimize integration friction with common MCUs and DSPs, while the SSOP‑20 (DB) package and DBR tape‑and‑reel option support efficient, repeatable assembly. With active lifecycle status and RoHS compliance, it fits long‑term product plans as well as rapid development cycles. If your next design needs a dependable, easy‑to‑source stereo audio ADC, the PCM1803ADBR offers a clear path from schematic to factory line without surprises.