CS4461-CZZR - 24-bit Multi-Bit ADC for Class-D PSR Feedback | Cirrus Logic
料号： CS4461-CZZR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： CS4461-CZZR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
CS4461-CZZ
✅ 直接替换📋 参考替代料（不在目录中）
CS4461-DZZ
✅ 直接替换📋 参考替代料（不在目录中）
ADS1271IPW
✅ 直接替换📋 参考替代料（不在目录中）
ADS131A04IPW
✅ 直接替换📋 参考替代料（不在目录中）
CS4461-CZZR 最大额定值与电气特性
| 功能 | 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 |
| 输出类型 | Serial digital (filterless, low delay) |
| Power Supply Rejection | Real-time feedback of AC and DC supply conditions |
| Power Consumption | 135 mW (typical) |
| 封装 | 24-pin TSSOP |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40C to +85C (automotive grade) |
| Commercial Temperature Option | -10C to +70C |
| RoHS 状态 | Compliant |
| Logic Level Support | Multiple logic levels supported |
| Evaluation Board | CDB44800 |
CS4461-CZZR 引脚配置
| 引脚 1 | VA — Analog supply voltage |
| 引脚 2 | AIN+ — Differential analog input positive |
| 引脚 3 | AIN- — Differential analog input negative |
| 引脚 4 | AGND — Analog ground |
| 引脚 5 | VREF — Voltage reference |
| 引脚 6 | NC — Not connected (per datasheet) |
| 引脚 7 | NC — Not connected (per datasheet) |
| 引脚 8 | MCLK — Master clock input |
| 引脚 9 | LRCK — Left-right word clock |
| 引脚 10 | SCLK — Serial data clock |
| 引脚 11 | SDOUT — Serial data output |
| 引脚 12 | DGND — Digital ground |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | RST — Reset (active low) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | VD — Digital supply voltage |
| 引脚 17 | NC — Not connected (per datasheet) |
| 引脚 18 | NC — Not connected (per datasheet) |
| 引脚 19 | NC — Not connected (per datasheet) |
| 引脚 20 | NC — Not connected (per datasheet) |
| 引脚 21 | NC — Not connected (per datasheet) |
| 引脚 22 | NC — Not connected (per datasheet) |
| 引脚 23 | NC — Not connected (per datasheet) |
| 引脚 24 | NC — Not connected (per datasheet) |
典型应用
CS4461-CZZR 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： CS4461-CZZR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Purpose-built for class-D amplifier PSR feedback with 7.5 MSPS sampling （对比 ADS1271IPW)
- Filterless digital output provides very low signal delay （对比 ADS131A04IPW)
- Direct family compatibility with CS49DV08 and CS44108 modulators （对比 Generic ADCs)
设计说明
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.
合规信息
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.
