CS5330A-KSZ - 18-Bit Stereo Sigma-Delta ADC, 50kS/s, SOIC-8 | Cirrus Logic
MPN: CS5330A-KSZ ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.3 | $43.00 |
| 100 | $3.65 | $365.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.75 | $2,750.00 |
CS5330A-KSZ Overview
An audio ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous-time analog audio signals into discrete digital codes suitable for DSP, streaming, or storage. The CS5330A-KSZ belongs to the sigma-delta (delta-sigma) ADC family, which trades raw speed for very high in-band resolution by oversampling the input and using a noise-shaping modulator. Within the broader taxonomy, it is a stereo audio ADC -> ADC -> data converter -> data acquisition IC -> mixed-signal integrated circuit -> semiconductor.
Key features include 18-bit resolution, 94 dB dynamic range, linear-phase digital anti-alias filtering that removes the need for an external RC anti-alias stage, and 0.05 dB passband ripple with greater than 80 dB stopband rejection. Power consumption is approximately 150 mW from a single +5 V supply, making it attractive for power-sensitive stereo capture designs.
Architecturally, the device uses a switched-capacitor sigma-delta modulator front end followed by a linear-phase FIR decimation filter, providing both channels from a common clock reference. The internal digital filter eliminates the external anti-alias network typically required by successive-approximation or pipelined ADCs, simplifying the BOM and reducing analog layout sensitivity.
Typical applications include USB audio interfaces, automotive head-unit auxiliary inputs, portable digital recorders, set-top box audio capture, and stereo line-level digitization for embedded DSP. The wide sample-rate range (2-50 kHz) supports both voice-band and full audio-band use cases.
When designing with this part, place decoupling capacitors close to the +5 V supply pin and follow Cirrus Logic reference layout guidelines for the analog ground plane. The serial output word clock and left/right framing must be matched to the downstream DSP or USB audio codec for correct stereo alignment.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and design notes that supplement the manufacturer datasheet.
Drop-in alternatives for CS5330A-KSZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CS5330A-KSZ (same form factor and footprint) — differing in Package, Number of Channels, Part Number, Resolution, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CS5330A-KS
✅ Drop-In📋 Reference alternative (not in catalog)
CS5331A-KSZ
✅ Drop-In✓ In Stock
$2.9 / Unit
View Datasheet →CS5330A-KSR
✅ Drop-In📋 Reference alternative (not in catalog)
CS5330A-BSZR
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →CS5330A-KSZ Maximum Ratings & Electrical Characteristics
| Manufacturer | Cirrus Logic |
| Part Number | CS5330A-KSZ |
| Product Family | CS5330A / CS5331A |
| Function | Stereo Analog-to-Digital Converter (ADC) |
| ADC Architecture | Sigma-Delta (Delta-Sigma) |
| Resolution | 18 bit |
| Number of Channels | 2 (Stereo - L/R) |
| Input Type | Single-Ended Analog |
| Output Sample Rate | 2 kHz to 50 kHz (continuously adjustable) |
| Dynamic Range | 94 dB |
| Passband Ripple | 0.05 dB |
| Stopband Rejection | >80 dB |
| Supply Voltage | +5 V single supply |
| Supply Current / Power | 150 mW (typical operation) |
| Operating Temperature | -40 C to +85 C |
| Package | SOIC-8 (KS) |
| Pin Count | 8 |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Lead Free (per DigiChip specification) |
| Screening Level | Industrial |
| Data Interface | Serial |
| Filter Type | Linear-phase digital anti-alias (internal) |
| Anti-Alias Filter | Integrated (no external RC required) |
CS5330A-KSZ Pin Configuration
| Pin 1 | AINL+ — Left channel positive analog input |
| Pin 2 | AINL- — Left channel negative analog input |
| Pin 3 | VA — +5 V analog supply |
| Pin 4 | AGND — Analog ground |
| Pin 5 | AINR- — Right channel negative analog input |
| Pin 6 | AINR+ — Right channel positive analog input |
| Pin 7 | VD — +5 V digital supply |
| Pin 8 | SDOUT / MCLK — Serial audio data output / master clock input |
Typical Applications
CS5330A-KSZ is suitable for 6 applications: USB Audio Interface Front End, Automotive Head-Unit Auxiliary Capture, Portable Digital Recorder / Dictation Station, Set-Top Box Audio Capture, Embedded DSP Audio Front End, Stereo Line-Level Digitizer for Test & Measurement.
USB Audio Interface Front End
The CS5330A-KSZ's 18-bit resolution and 94 dB dynamic range suit consumer USB audio interfaces where stereo line-level analog inputs are digitized and forwarded over I2S to a USB codec such as the PCM2706. The integrated linear-phase digital anti-alias filter removes the need for external RC filter components ahead of the converter, simplifying the BOM to a few decoupling caps and a crystal. Power consumption of 150 mW from a single +5 V rail is straightforward to provide from a USB bus-powered supply, and the SOIC-8 footprint keeps the analog front-end area below 30 mm^2 on a 2-layer PCB.
Recommended
Automotive Head-Unit Auxiliary Capture
In an automotive head-unit aux-input or Bluetooth-return path, the CS5330A-KSZ digitizes stereo line-level audio with 94 dB dynamic range, well above the noise floor of typical infotainment analog stages. The industrial -40 to +85 C operating temperature range covers the cabin and trunk head-unit environment without derating. Because the part is EOL, automotive programs should evaluate the CS5331A-KSZ as the in-family upgrade; CS5330A-KSZ is suitable for service replacements of legacy modules already in production.
Recommended
Portable Digital Recorder / Dictation Station
Battery-powered portable recorders benefit from the CS5330A-KSZ's 150 mW power budget on a single +5 V rail and its adjustable 2-50 kHz sample rate that supports both voice-band (8 kHz) and full-band (48 kHz) capture modes. The integrated anti-alias filter is a key benefit in dense portable layouts where routing an external RC filter is impractical. The 8-pin SOIC footprint and 18-bit output pair naturally with low-cost DSP or Cortex-M I2S peripherals for WAV or compressed audio encoding.
Recommended
Set-Top Box Audio Capture
Set-top boxes that digitize analog audio from legacy SCART, RCA or internal tuner paths can use the CS5330A-KSZ to provide 18-bit stereo audio into the main SoC over a serial interface. The 94 dB dynamic range exceeds broadcast FM quality requirements and the 2-50 kHz sample rate covers both 32 kHz and 48 kHz consumer formats. Internal anti-alias filtering eliminates an external op-amp + RC network that would otherwise consume board area near the RF section.
Recommended
Embedded DSP Audio Front End
Embedded DSP platforms (TI C6000, ADI SHARC) require a compact, low-power stereo ADC front end; the CS5330A-KSZ delivers 18-bit serial data that connects directly to the McBSP or SPORT port via three wires (MCLK, LRCK, SDATA). The 50 kHz maximum sample rate suits mid-bandwidth algorithms such as acoustic echo cancellation, beamforming and audio analytics at the edge. The single +5 V supply simplifies analog power design compared to parts requiring separate AVDD/DVDD rails.
Recommended
Stereo Line-Level Digitizer for Test & Measurement
Test and measurement fixtures can use the CS5330A-KSZ as a compact 18-bit stereo digitizer for ATE, audio analyzers, and production-line test of consumer audio sources. The continuously adjustable 2-50 kHz sample rate allows characterization at multiple standard rates (44.1 kHz, 48 kHz) without changing the front end. The integrated anti-alias filter and SOIC-8 footprint simplify fixture design, and the >80 dB stopband rejection ensures alias products stay below the measurement noise floor of most consumer audio DUTs.
Recommended
Recommended Products Summary
Engineering reference data for CS5330A-KSZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CS5330A-KS | CS5331A-KSZ | CS5330A-KSR | CS5330A-BSZR |
|---|---|---|---|---|---|
| Package | SOIC-8 (KS) | SOIC-8 (KS) - same | SOIC-8 (KS) - same | SOIC-8 (KS) - same | SOIC-8 wide (BS) - same family, wider body |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Resolution | 18 bit | 18 bit | 18 bit | 18 bit | 18 bit |
| Dynamic Range | 94 dB | 94 dB | ~98 dB | 94 dB | 94 dB |
| Sample Rate | 2 - 50 kHz | 2 - 50 kHz | 2 - 50 kHz | 2 - 50 kHz | 2 - 50 kHz |
| Supply | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single |
| Channels | 2 (Stereo) | 2 (Stereo) | 2 (Stereo) | 2 (Stereo) | 2 (Stereo) |
| RoHS / Lead-Free | Lead-Free (Z) | Non-Z finish | Lead-Free (Z) | Lead-Free (Z) | Lead-Free (Z) |
| Lifecycle | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) |
Key Differentiators
- Integrated linear-phase digital anti-alias filter (vs CS5330A-KS)
- Higher dynamic range than CS5330A in the same SOIC-8 package (vs CS5331A-KSZ)
- Wide 2-50 kHz sample-rate range covers both voice and full audio bands (vs Fixed-rate 48 kHz audio ADCs)
Design Notes
The CS5330A-KSZ requires a clean single +5 V analog supply. Place a 10 uF tantalum or ceramic bulk capacitor and a 0.1 uF ceramic decoupling capacitor within 5 mm of the VA and VD pins. Use a ferrite bead or LC filter between the digital +5 V rail and the VD pin to prevent digital switching noise from coupling into the analog modulator. Star-ground lift is 0 V at the AGND pin with a single-point connection to the system ground plane.
Keep analog input traces (AINL+/-, AINR+/-) short, symmetric, and routed over a continuous ground pour. The serial digital output (SDOUT) and MCLK traces should be kept away from the analog inputs and crossed only at right angles. Place the master clock crystal or oscillator within 25 mm of the MCLK pin and guard the trace with ground vias to limit radiated EMI.
Drive the MCLK pin with a low-jitter clock source; sample-rate accuracy and dynamic range both depend on clock quality. Avoid routing MCLK adjacent to switching power traces. If the downstream host cannot accept 18-bit right-justified data, configure the word clock (LRCK) and SDOUT timing to match the host I2S or left-justified mode per the CS5330A/31A datasheet timing diagrams.
Do not apply analog input signals greater than the VA supply rail; the absolute maximum ratings include over-voltage stress on the analog input pins. Confirm the input common-mode voltage stays within the specified range; AC-couple the inputs through 10 uF capacitors if the source common-mode does not match the CS5330A's mid-supply bias. Do not assume the CS5330A-KS and CS5330A-KSZ are still active - both are EOL per the GlobalSpec listing.
Compliance Information
Lead-free per DigiChip spec; Z suffix confirms RoHS-compliant finish. Other compliance fields not stated in verified data.
