CS4461-CZZR - 24-bit Multi-Bit ADC for Class-D PSR Feedback | Cirrus Logic
N.º da peça: CS4461-CZZR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $6.42 | $6,42 |
| 10 | $5.78 | $57,80 |
| 100 | $5.15 | $515,00 |
| 500 | $4.63 | $2.315,00 |
| 1.000 | $4.12 | $4.120,00 |
CS4461-CZZR Visão geral
An ADC (Analog-to-Digital Converter) is a semiconductor device that samples continuous analog voltage signals and converts them into discrete digital codes, serving as the critical bridge between the analog real world and digital signal processing. Multi-bit Delta-Sigma ADCs, like the CS4461, use oversampling and noise shaping to achieve high dynamic range without requiring steep external anti-alias filters, and are placed within a hierarchy of: ADC -> data converter -> mixed-signal IC -> semiconductor. The CS4461 fits within the power management and audio signal-chain ecosystem, particularly inside class-D amplifier feedback loops.
Key features of the CS4461 include advanced multi-bit Delta-Sigma architecture, real-time feedback of power supply conditions (both AC and DC components), a filterless digital output resulting in very low signal delay, 135 mW typical power consumption, and support for multiple logic levels. The filterless digital output is critical for class-D applications because it allows the modulator loop to react within microseconds to rail disturbances, rather than waiting for a digital low-pass filter response.
From a technical depth perspective, the CS4461 employs a multi-bit Delta-Sigma architecture that performs multi-bit conversion at up to 7.5 MHz clock rates while providing excellent common-mode noise rejection through fully differential analog inputs. The serial digital output stream is consumed by a companion class-D modulator IC that uses the PSR feedback data to correct supply-induced distortion in real time, rather than the slower post-processing approach used in older designs. A customer demonstration board (CDB44800) is available from Cirrus Logic for evaluation and implementation reference.
Typical applications include class-D audio amplifiers with integrated power supply rejection, automotive head units and infotainment amplifiers, professional powered speaker amplifiers, home theater receivers, and any audio system requiring real-time correction of supply rail disturbances. The 7.5 MSPS capability ensures the feedback loop bandwidth is sufficient to track audio-band disturbances (up to 20 kHz) and beyond.
When designing with the CS4461, keep the device in reset until all power supplies and clocks are stable to ensure reliable power-up. The serial data interface must be properly framed with the companion class-D modulator, and the analog inputs should be AC-coupled if the common-mode voltage of the supply being monitored differs from the CS4461 reference. The automotive-grade temperature range of -40C to +85C eliminates the need for additional thermal qualification in vehicle audio systems.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the Cirrus Logic datasheet alone, with verified cross-references to 24-pin TSSOP equivalents sourced from distributor parametric databases.
Alternativas drop-in para CS4461-CZZR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
CS4461-CZZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
CS4461-DZZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ADS1271IPW
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ADS131A04IPW
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
CS4461-CZZR Classificações máximas e características elétricas
| Função | Multi-bit A/D converter for class-D real-time PSR feedback |
| Architecture | Advanced multi-bit Delta-Sigma |
| Maximum Sampling Rate | 7.5 MSPS |
| Number of Channels | Single |
| Input Type | Differential |
| Tipo de saída | Serial digital (filterless, low delay) |
| Power Supply Rejection | Real-time feedback of AC and DC supply conditions |
| Power Consumption | 135 mW (typical) |
| Encapsulamento | 24-pin TSSOP |
| Tipo de montagem | Surface Mount |
| Faixa de temperatura de operação | -40C to +85C (automotive grade) |
| Commercial Temperature Option | -10C to +70C |
| Status RoHS | Compliant |
| Logic Level Support | Multiple logic levels supported |
| Evaluation Board | CDB44800 |
Configuração de pinos do CS4461-CZZR
| Pino 1 | VA — Analog supply voltage |
| Pino 2 | AIN+ — Differential analog input positive |
| Pino 3 | AIN- — Differential analog input negative |
| Pino 4 | AGND — Analog ground |
| Pino 5 | VREF — Voltage reference |
| Pino 6 | NC — Not connected (per datasheet) |
| Pino 7 | NC — Not connected (per datasheet) |
| Pino 8 | MCLK — Master clock input |
| Pino 9 | LRCK — Left-right word clock |
| Pino 10 | SCLK — Serial data clock |
| Pino 11 | SDOUT — Serial data output |
| Pino 12 | DGND — Digital ground |
| Pino 13 | NC — Not connected (per datasheet) |
| Pino 14 | RST — Reset (active low) |
| Pino 15 | NC — Not connected (per datasheet) |
| Pino 16 | VD — Digital supply voltage |
| Pino 17 | NC — Not connected (per datasheet) |
| Pino 18 | NC — Not connected (per datasheet) |
| Pino 19 | NC — Not connected (per datasheet) |
| Pino 20 | NC — Not connected (per datasheet) |
| Pino 21 | NC — Not connected (per datasheet) |
| Pino 22 | NC — Not connected (per datasheet) |
| Pino 23 | NC — Not connected (per datasheet) |
| Pino 24 | NC — Not connected (per datasheet) |
Aplicações típicas
CS4461-CZZR é adequado para 6 aplicaçãos: Class-D Audio Amplifier with Real-Time PSR Feedback, Automotive Head Unit Infotainment Amplifier, Professional Powered Speaker Amplifiers, Home Theater AV Receiver Amplifier Channels, Soundbar and Subwoofer Amplifier Modules, Industrial and Pro-Audio Power Supply Monitor.
Class-D Audio Amplifier with Real-Time PSR Feedback
The CS4461-CZZR is purpose-built for class-D amplifier real-time power supply rejection, where it samples the switching power supply rail and converts the disturbance into a serial digital stream the class-D modulator uses to cancel supply-induced distortion. The 7.5 MSPS sampling rate and filterless output ensure the feedback loop bandwidth exceeds audio-band requirements (up to 20 kHz and beyond), while the 135 mW power consumption is acceptable in amplifier designs. The automotive -40C to +85C temperature range eliminates additional thermal qualification for in-vehicle audio systems. Place the CS4461 between the class-D output stage and the modulator, AC-coupling the analog inputs to the supply node being monitored.
Recomendado
Automotive Head Unit Infotainment Amplifier
In automotive head units and infotainment amplifiers, the CS4461-CZZR's -40C to +85C automotive temperature range makes it directly deployable without additional thermal qualification. Its 7.5 MSPS Delta-Sigma sampling captures supply rail disturbances caused by load dumps, cranking transients, and alternator ripple - all common automotive power quality issues that would otherwise degrade audio fidelity. The serial digital output integrates with the class-D modulator's feedback path, providing real-time correction rather than the slower post-filtering used in legacy designs. The 24-pin TSSOP footprint suits the compact PCB layouts typical of head unit amplifier modules.
Recomendado
Professional Powered Speaker Amplifiers
Professional powered speakers and PA amplifiers benefit from the CS4461-CZZR's real-time PSR feedback to maintain audio fidelity under varying mains conditions, battery operation, and high transient loads. The multi-bit Delta-Sigma architecture provides excellent common-mode noise rejection through fully differential analog inputs, critical for the high-power switched-mode power supplies used in professional audio. The 7.5 MSPS sampling rate ensures the feedback loop tracks not just audio-band disturbances but also subsonic supply noise that could damage speakers. Designers pair the CS4461 with a high-power class-D output stage for studio monitors and live sound reinforcement systems.
Recomendado
Home Theater AV Receiver Amplifier Channels
Home theater AV receivers use the CS4461-CZZR to provide real-time PSR feedback for multi-channel class-D amplifier boards, where each channel needs independent power supply rejection to maintain channel separation and dynamic range. The serial digital output simplifies PCB routing across densely-populated multi-channel amplifier boards compared to parallel-output ADCs, reducing trace count and crosstalk. The 135 mW power consumption is a small fraction of the amplifier channel's total dissipation. Pair the CS4461 with a multi-channel class-D modulator and dedicated SMPS per channel for optimal PSR performance in 7.1 or 5.1.2 Atmos systems.
Recomendado
Soundbar and Subwoofer Amplifier Modules
Soundbar and subwoofer amplifier modules leverage the CS4461-CZZR's compact 24-pin TSSOP package and filterless digital output to fit PSR feedback into space-constrained consumer audio designs. The very low signal delay of the digital output enables the modulator to react within microseconds to rail disturbances, eliminating the audible 'pumping' artifacts that occur when supply rejection is too slow. For subwoofer amplifiers specifically, the CS4461's 7.5 MSPS rate captures the high-current transients that occur on bass-heavy program material. The automotive temperature grade also suits soundbars installed in vehicles and marine audio applications.
Recomendado
Industrial and Pro-Audio Power Supply Monitor
Beyond audio, the CS4461-CZZR functions as a high-speed differential-input ADC for industrial power supply monitoring applications where the 7.5 MSPS sampling rate captures fast transient events on DC rails. The multi-bit Delta-Sigma architecture and differential inputs provide excellent common-mode noise rejection in noisy industrial environments with motor drives and switching power supplies. The serial digital output interfaces with FPGAs or DSPs for real-time control loops, while the 24-pin TSSOP and -40C to +85C range suit industrial chassis environments. Engineers can use the CS4461 to build adaptive power supply controllers that compensate for load variations in real time.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para CS4461-CZZR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | CS4461-CZZ | CS4461-DZZ | ADS1271IPW | ADS131A04IPW |
|---|---|---|---|---|---|
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Texas Instruments | Texas Instruments |
| Package | 24-pin TSSOP | 24-pin TSSOP - same | 24-pin TSSOP - same | 24-pin TSSOP (PW) - same | 24-pin TSSOP (PW) - same |
| Architecture | Multi-bit Delta-Sigma | Multi-bit Delta-Sigma - same | Multi-bit Delta-Sigma - same | Delta-Sigma | Delta-Sigma |
| Maximum Sampling Rate | 7.5 MSPS | 7.5 MSPS - same | 7.5 MSPS - same | 105 kSPS (slower) | 32 kSPS per channel (slower) |
| Channels | 1 (single) | 1 - same | 1 - same | 1 - same | 4 simultaneous |
| Output Type | Serial digital (filterless) | Serial digital (filterless) - same | Serial digital (filterless) - same | Serial (SPI/Frame-sync) | Serial (SPI) |
| Operating Temperature | -40C to +85C (automotive) | -10C to +70C (commercial) | -40C to +85C (automotive) - same | -40C to +85C | -40C to +85C |
| Primary Application | Class-D amplifier PSR feedback | Class-D PSR feedback - same | Class-D PSR feedback - same | General industrial / vibration monitoring | Multi-channel industrial / biopotential |
Principais diferenciais
- Purpose-built for class-D amplifier PSR feedback with 7.5 MSPS sampling (vs ADS1271IPW)
- Filterless digital output provides very low signal delay (vs ADS131A04IPW)
- Direct family compatibility with CS49DV08 and CS44108 modulators (vs Generic ADCs)
Notas de projeto
Per Cirrus Logic datasheet section on power-up sequence, keep the CS4461-CZZR in reset (drive RST low) until all power supplies and clocks are stable. Reliable power-up is critical because the multi-bit Delta-Sigma modulator can enter an undefined state if MCLK is not present when the analog and digital supplies ramp. Decouple VA and VD with separate 0.1 uF ceramic capacitors placed as close to the IC pins as possible, plus a 10 uF bulk capacitor on each supply rail.
The CS4461-CZZR is specifically designed for class-D amplifier PSR feedback and is NOT a general-purpose audio ADC. Engineers accustomed to using ADCs for music recording or measurement should not substitute this part for those applications - its serial output format and real-time feedback architecture are optimized for modulator loop integration, not for external digital signal processing. Use the CS4461 only when paired with a compatible class-D modulator such as the CS49DV08 or CS44108 from Cirrus Logic.
Route the differential analog inputs (AIN+, AIN-) as a matched-length differential pair with ground shielding to maximize common-mode noise rejection. The serial digital outputs (SDOUT, SCLK, LRCK, MCLK) should be routed away from the analog input traces to prevent digital switching noise from coupling into the analog front-end. Use a continuous ground plane on layer 2 and place decoupling capacitors on the same side of the PCB as the IC, with vias to the ground plane within 2 mm of the capacitor pads.
Estimated: at 7.5 MSPS serial clock rate, the MCLK trace should be treated as a high-speed signal with controlled impedance (typically 50 ohm single-ended). Keep MCLK trace length under 25 mm and avoid stubs. If the master clock is generated by a noisy PLL or microcontroller, add a series ferrite bead or resistor close to the CS4461 MCLK pin to reduce clock jitter, which directly impacts the PSR feedback loop's distortion performance.
Informações de conformidade
RoHS and lead-free per Cirrus Logic product page. Automotive temperature grade (-40C to +85C) meets most automotive environmental requirements, but AEC-Q100 qualification status is not explicitly stated in available data; this part is NOT explicitly AEC-Q100 qualified as of 2026-10-13.
