CS5331A-DSZ - 18-Bit Stereo Audio ADC | Cirrus Logic
Référence : CS5331A-DSZ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $7.95 | $7,95 |
| 10 | $7.1 | $71,00 |
| 100 | $6.05 | $605,00 |
| 500 | $5.4 | $2 700,00 |
| 1 000 | $4.85 | $4 850,00 |
CS5331A-DSZ Présentation
An ADC (Analog-to-Digital Converter) is a semiconductor device that converts continuous analog signals into discrete digital codes. The CS5331A belongs to the sigma-delta (ΔΣ) converter family, which uses oversampling and noise shaping to achieve high resolution at audio bandwidths. Within the broader hierarchy, this part is an audio ADC -> data converter -> signal chain IC -> power management & signal chain. Sigma-delta ADCs are favored in audio for their inherent linearity, built-in digital filtering, and tolerance to clock jitter compared to successive-approximation or flash architectures.
Key features of the CS5331A-DSZ include 18-bit resolution across two channels, an integrated digital decimation filter, single +5 V analog supply operation, and a serial audio output interface compatible with common DSPs and audio processors. The chip's 8-pin SOIC footprint keeps the analog input path short, reducing noise pickup on the front end. The output word rate is user-programmable, allowing the same device to support 48 kHz, 44.1 kHz, and 32 kHz families plus multiples.
Technically, the CS5331A combines a switched-capacitor front-end with a multi-bit delta-sigma modulator stage, providing wide dynamic range while keeping the analog input structure simple. The integrated digital low-pass filter provides anti-alias rejection and removes the need for an external post-ADC filter, which is a significant board-space and BOM-cost saver versus discrete ADC + op-amp + filter designs.
Typical applications include digital audio recording systems, A/V receivers, set-top boxes, computer sound cards, and musical instrument effect units. The wide 2-50 kHz sample rate range also supports specialty uses such as ultrasonic or sub-audio data acquisition. Design considerations include providing a low-impedance ground plane near the analog inputs, a clean +5 V supply with adequate decoupling, and routing the serial output away from the analog inputs to avoid digital feedback. This page combines distributor pricing, drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour CS5331A-DSZ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec CS5331A-DSZ (même facteur de forme et même empreinte) — différant par Number of Channels, Package, Part Number, Operating Temperature, Resolution.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
CS5330A-KSZ
✅ Remplacement direct✓ En stock
$2.75 / unité
Voir la fiche technique →CS5330A-BSZ
✅ Remplacement direct✓ En stock
$3.1 / unité
Voir la fiche technique →CS5330A-BSZR
✅ Remplacement direct✓ En stock
$3.1 / unité
Voir la fiche technique →CS5330A-KSZR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PCM1808PWR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CS5331A-DSZ Valeurs maximales et caractéristiques électriques
| Résolution | 18 bits |
| Number of Channels | 2 (stereo) |
| Converter Type | Sigma-Delta (2 modulators, 128x oversampling) |
| Input Configuration | 2 single-ended analog inputs |
| Output Sample Rate Range | 2 kHz to 50 kHz |
| Analog Supply Voltage | +5 V (single supply) |
| Boîtier | 8-pin SOIC (DSZ) |
| Type de montage | Surface Mount |
| Température de fonctionnement | -10 C to +70 C |
| Output Interface | Serial (audio data, two's complement) |
| Integrated Anti-Alias Filter | Yes (digital decimation filter on chip) |
| Statut RoHS | Compliant |
| Lead-Free | Yes |
Configuration des broches de CS5331A-DSZ
| Broche 1 | VREF — Voltage reference (decoupling to AGND) |
| Broche 2 | VA+ — Analog +5 V supply |
| Broche 3 | AGND — Analog ground |
| Broche 4 | LRCK/FS — Left/Right word clock / frame sync |
| Broche 5 | SDATA — Serial audio data output |
| Broche 6 | SCLK — Serial bit clock for SDATA |
| Broche 7 | MCLK — Master clock input |
| Broche 8 | DGND — Digital ground |
Applications typiques
CS5331A-DSZ convient pour 6 applications: Digital Audio Recording Systems, A/V Receivers and Set-Top Boxes, Computer Sound Cards, Musical Instrument Effect Units, Industrial Data Acquisition (Audio-Bandwidth), Automotive Infotainment (Legacy).
Digital Audio Recording Systems
The CS5331A-DSZ is well suited to digital audio recording front-ends thanks to its 18-bit resolution, integrated anti-alias filtering, and 2-50 kHz output sample rate range. Placed at the analog input of a recorder, the chip's two delta-sigma modulators sample the left/right audio channels at 128x oversampling and produce serial 18-bit two's-complement data, eliminating the need for an external op-amp or anti-alias filter stage. This integration reduces BOM cost and analog front-end complexity, while the 5 V single-supply operation keeps power-rail design simple. Engineers benefit from a 90 dB-class dynamic range suitable for 16-bit/44.1 kHz consumer recording. A trade-off versus modern 24-bit ADCs is lower absolute dynamic range and less headroom for high-SPL sources, but the 18-bit resolution remains adequate for CD-quality recording.
Recommandé
A/V Receivers and Set-Top Boxes
The CS5331A-DSZ serves as a stereo ADC in the analog input path of A/V receivers and set-top boxes that need to digitize legacy analog audio sources for downstream DSP. Its 8-pin SOIC package allows it to be placed directly behind RCA input jacks, and the single 5 V supply can be derived from the receiver's standby rail. The chip's integrated decimation filter removes aliasing from signals up to 50 kHz, sufficient for 48 kHz audio plus guard band. Compared to discrete ADC + filter designs, the CS5331A reduces PCB area by roughly 50% and BOM count by 4-6 components. The 18-bit resolution matches the bit depth used by most broadcast and consumer audio standards, making it a natural fit for legacy analog-to-digital conversion in cost-sensitive home AV equipment.
Recommandé
Computer Sound Cards
The CS5331A-DSZ has been widely used in computer sound cards as a line-input / microphone stereo ADC, where its 8-pin SOIC footprint fits the densely packed analog section of a sound card PCB. The chip's 2-50 kHz sample rate range covers the standard 44.1 kHz and 48 kHz audio rates plus their 2x and 4x oversampled multiples used by high-definition audio drivers. The integrated digital filter removes the need for a separate post-ADC filter IC, simplifying routing around the audio codec. With a single 5 V supply, the CS5331A can be powered from the sound card's analog rail directly. Designers appreciate the chip's mature driver support and broad third-party documentation. The 18-bit resolution is sufficient for legacy 16-bit audio applications and entry-level recording, but modern high-fidelity sound cards may prefer 24-bit sigma-delta alternatives.
Recommandé
Musical Instrument Effect Units
The CS5331A-DSZ suits the analog input stage of musical instrument effect units and digital amplifiers that need to sample line-level instrument signals at 44.1 kHz or 48 kHz. Its 18-bit resolution captures the dynamics of guitar, keyboard, and line-level inputs with adequate headroom, while the 2-channel input supports stereo instrument processing. The integrated decimation filter simplifies the analog front-end, allowing pedal-style enclosures to keep the signal path short. The 8-pin SOIC package is hand-solderable for low-volume boutique effect builders, though the 5 V supply requirement may need a small boost converter in 9 V pedal architectures. Compared to modern 24-bit ADCs, the CS5331A offers slightly higher noise floor but at a lower unit cost that suits hobbyist and prosumer products.
Recommandé
Industrial Data Acquisition (Audio-Bandwidth)
The CS5331A-DSZ can be used for audio-bandwidth data acquisition in industrial monitoring systems, such as vibration analysis up to 25 kHz or acoustic emission monitoring. Its 2-50 kHz output sample rate range supports Nyquist frequencies up to 25 kHz, suitable for many mechanical-condition-monitoring tasks. The 18-bit resolution provides ~108 dB theoretical dynamic range, adequate for most predictive-maintenance front-ends. The single 5 V supply can be derived from industrial 24 V buses via a small linear regulator. Engineers should note that the 8-pin SOIC package has a 0 C to 70 C commercial temperature range, which is acceptable for indoor industrial enclosures but unsuitable for outdoor or automotive deployments. Compared to dedicated industrial SAR ADCs, the CS5331A offers better linearity at the cost of lower absolute sample rate.
Recommandé
Automotive Infotainment (Legacy)
The CS5331A-DSZ has been used in legacy automotive infotainment head units for analog audio input digitization, where it captures AM/FM tuner outputs, CD changer analog audio, and auxiliary inputs. The 8-pin SOIC footprint and 5 V supply are compatible with typical 12 V automotive power architectures using a 7805-style regulator. The 18-bit resolution matches the bit depth of CD-audio playback paths, and the 2-50 kHz range covers 44.1 kHz CD sampling. Modern automotive designs now prefer AEC-Q100-qualified parts for harsh-environment reliability, so the CS5331A is typically retained only in cost-sensitive aftermarket head units. Designers should evaluate the commercial 0-70 C temperature range against the vehicle cabin environment; a heatsink or thermal management may be required in sealed dashboard enclosures.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour CS5331A-DSZ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | CS5330A-KSZ | CS5330A-BSZ | CS5330A-BSZR | PCM1808PWR |
|---|---|---|---|---|---|
| Package | SOIC-8 (DSZ) | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 (PW) - same |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Texas Instruments |
| Resolution | 18 bits | 16 bits | 16 bits | 16 bits | 24 bits |
| Channels | 2 (stereo) | 2 (stereo) | 2 (stereo) | 2 (stereo) | 2 (stereo) |
| Sample Rate Range | 2 kHz to 50 kHz | 2 kHz to 50 kHz | 2 kHz to 50 kHz | 2 kHz to 50 kHz | Up to 96 kHz |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | 3.3 V to 5 V |
| Operating Temperature | -10 C to +70 C | -10 C to +70 C | -10 C to +70 C | -10 C to +70 C | -40 C to +85 C |
| Converter Architecture | Sigma-Delta (128x OSR) | Sigma-Delta (128x OSR) | Sigma-Delta (128x OSR) | Sigma-Delta (128x OSR) | Sigma-Delta (64x/128x OSR) |
Principaux différenciateurs
- Higher resolution than the CS5330A family while sharing the SOIC-8 footprint (vs CS5330A-KSZ)
- Wider sample rate range and lower unit cost than the TI PCM1808PWR (vs PCM1808PWR)
- Integrated anti-alias filter eliminates external op-amp + filter stage (vs Discrete ADC + filter designs)
Notes de conception
The CS5331A-DSZ requires a clean +5 V analog supply; place a 10 uF bulk tantalum plus 0.1 uF ceramic decoupling capacitor within 5 mm of the VA+ pin (pin 2) to suppress digital switching noise from the modulator clock. Star-ground the AGND (pin 3) and DGND (pin 8) returns separately back to the regulator to avoid digital ground currents polluting the analog reference. Estimated: at 5 V and ~25 mA supply current, dissipation is ~125 mW, well within SOIC-8 thermal limits and no heatsink is required.
Route the analog input traces as short, guarded differential pairs with the AGND guard trace on both sides. Keep the MCLK trace (pin 7) short and away from the analog input pins to prevent clock coupling into the modulator. Place the VREF decoupling cap (pin 1) directly on the pin with a 0.1 uF ceramic to ground. Use a continuous ground pour on the top layer under the SOIC-8 to provide a low-impedance return for the digital outputs. Estimated: total layout area including bypass caps and ground pour is approximately 200 mm^2, allowing the chip to fit in compact sound card and A/V receiver designs.
The serial audio output (SDATA, pin 5) is a two's-complement MSB-first stream; ensure the receiving DSP or audio processor is configured for the same serial format and bit depth (18 bits). The LRCK/FS (pin 4) word clock must be a clean 50/50 duty-cycle signal to avoid left/right channel gain mismatch. SCLK (pin 6) should be at least 64x the sample rate to clock out all 18 bits per channel. If SCLK jitter exceeds 200 ps RMS, expect measurable degradation in THD+N; route SCLK over a continuous ground plane and avoid sharing with other fast digital signals. Estimated: with a 5 ppm crystal driving MCLK, the converter's effective SNR at 1 kHz is typically 90 dB unweighted.
Do not apply analog input signals exceeding VA+ (5 V) on the input pins; the absolute maximum is 6 V which will damage the modulator. Do not leave MCLK floating - the chip requires a continuous master clock to operate. Do not connect the digital supply (DGND) and analog ground (AGND) at multiple points - use a single-point ground near the chip. Do not assume 18-bit parts are bit-compatible with 16-bit DSPs - the LSBs may be truncated or sign-extended depending on the receiver configuration; consult the Cirrus Logic datasheet for the exact serial format.
Informations de conformité
RoHS compliant per distributor listings. Not AEC-Q100 qualified - commercial grade -10 C to +70 C; not suitable for automotive safety-critical applications. Halogen-free status not confirmed in provided data.
