CS5532-ASZ - 24-Bit Sigma-Delta ADC with PGIA | Cirrus Logic
MPN: CS5532-ASZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.96 | $12.96 |
| 10 | $12.5 | $125.00 |
| 100 | $11.4 | $1,140.00 |
| 500 | $10.6 | $5,300.00 |
| 1,000 | $9.85 | $9,850.00 |
Drop-in alternatives for CS5532-ASZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CS5532-ASZR
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View Datasheet →CS5531-ASZ
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View Datasheet →CS5533-ASZ
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View Datasheet →CS5533-ASZR
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View Datasheet →CS5534-ASZR
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View Datasheet →CS5532-ASZ Maximum Ratings & Electrical Characteristics
| Resolution | 24 bit |
| Number of Input Channels | 2 differential |
| Architecture | Sigma-Delta (charge-balance) |
| Analog Front-End | Ultra-low-noise PGIA (programmable gain instrumentation amplifier) |
| Input Type | Differential, unipolar or bipolar signals |
| Interface | SPI (serial) |
| Package | 20-SSOP |
| Operating Temperature Range | -40C to +85C |
| Mounting Type | Surface Mount |
| Family | CS5531/32/33/34 |
| Typical Applications | Weigh scale, process control, scientific and medical instrumentation |
CS5532-ASZ 20-ssop Pin Configuration Guide
Complete pinout information for CS5532-ASZ (20-ssop package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for CS5532-ASZ.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
CS5532-ASZ is suitable for 6 applications: Electronic Weigh Scales, Industrial Process Control Transmitters, Scientific Instrumentation, Medical and Diagnostic Equipment, Temperature Measurement (RTD / Thermocouple Front Ends), Battery-Powered Portable Instrumentation.
Electronic Weigh Scales
Electronic weigh scales are the flagship application for the CS5532-ASZ. Load-cell bridges output only a few millivolts at full scale (typically 2 mV/V of excitation), so microvolt-level resolution and low noise directly determine display counts. The CS5532-ASZ 24-bit charge-balance sigma-delta core plus integrated ultra-low-noise PGIA lets the load cell connect directly to the differential inputs without a discrete instrumentation amplifier, preserving noise-free counts. The charge-balance architecture inherently rejects 50/60 Hz mains interference present near industrial floor scales. Programmable word rate allows fast settling during tare and startup, then a slower, higher-resolution rate for the final weight reading, maximizing effective resolution per conversion.
Recommended
Industrial Process Control Transmitters
In process control, pressure, level, and differential-pressure transmitters convert bridge or RTD sensor outputs into 4-20 mA loop signals, demanding stable microvolt-level measurement over -40C to +85C ambient conditions. The CS5532-ASZ fits this role with its industrial temperature rating, 24-bit resolution for drift-free ratiometric measurement, and differential inputs that reject common-mode noise on long sensor cable runs. The integrated PGIA allows one-gain calibration across sensor spans. Because conversion results are delivered over SPI, any microcontroller in the transmitter head can apply linearization and HART-style digital communication. The sigma-delta filtering suppresses line-frequency pickup from nearby motors and switchgear, protecting measurement integrity in electrically harsh plants.
Recommended
Scientific Instrumentation
Scientific instruments - electrometers, spectrophotometer detectors, and data-acquisition front ends - require converters whose noise floor stays below the phenomenon being measured. The CS5532-ASZ 24-bit sigma-delta converter with ultra-low-noise PGIA resolves microvolt-level unipolar or bipolar signals, and its charge-balance technique averages noise over the conversion window, improving effective resolution at slower word rates. Two differential channels let one device sample both a measurement signal and a reference or compensation channel synchronously. The SPI interface integrates cleanly with laboratory microcontroller or FPGA-based acquisition logic, and the 20-SSOP surface-mount package suits compact instrument boards where analog and digital sections share tight space.
Recommended
Medical and Diagnostic Equipment
Medical instrumentation such as patient scales, infusion-pump force sensing, and diagnostic analyzers measures low-level bridge signals where safety and accuracy regulations leave little margin for noise-induced error. The CS5532-ASZ addresses these needs with a 24-bit charge-balance sigma-delta converter, an ultra-low-noise PGIA that connects directly to sensor bridges, and differential inputs that reject common-mode interference from surrounding power electronics. Its -40C to +85C range covers storage and transport conditions in addition to clinical environments. Ratiometric operation (sharing the sensor excitation as the ADC reference) cancels excitation drift, an important stability factor for repeated diagnostic readings. The SPI port supports isolated interfaces, which medical designs frequently require for patient-connected front ends.
Recommended
Temperature Measurement (RTD / Thermocouple Front Ends)
Precision temperature transmitters built on RTD bridges or thermocouples benefit directly from the CS5532-ASZ signal chain. RTD bridges produce small differential voltages that change only microvolts per degree, so the PGIA gain combined with 24-bit conversion yields sub-0.1C resolution. Ratiometric wiring - driving the RTD excitation and the ADC reference from the same source - makes the measurement immune to excitation drift, and the differential inputs remove ground-potential errors on long probe cables. The sigma-delta oversampling filters 50/60 Hz interference picked up in industrial thermal processes. Cold-junction compensation for thermocouples can occupy the second differential channel, giving a complete two-channel temperature front end in one 20-SSOP device.
Recommended
Battery-Powered Portable Instrumentation
Portable diagnostic tools, handheld force gauges, and battery-operated data loggers need high resolution at low average power. The CS5532-ASZ supports duty-cycled operation: the converter is commanded over SPI to perform a single high-resolution conversion and then placed in a low-power state between readings, so average current scales with the measurement rate rather than running continuously. The 24-bit charge-balance conversion extracts maximum information per sample, allowing fewer samples and lower radio or display activity downstream. Its SPI interface works directly with low-power microcontrollers, and the compact 20-SSOP surface-mount footprint fits slim handheld PCBs while the industrial temperature range tolerates outdoor field use.
Recommended
Recommended Products Summary
Engineering reference data for CS5532-ASZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CS5532-ASZR | CS5532-BSZ | CS5531-ASZ | CS5533-ASZ | CS5534-ASZR |
|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Resolution | 24 bit | 24 bit | 24 bit | 16 bit | 16 bit | 24 bit |
| Input Channels | 2 differential | 2 differential | 2 differential | 2 differential | 2 differential | 4 differential |
| Architecture | Sigma-Delta (charge-balance) | Sigma-Delta (charge-balance) | Sigma-Delta (charge-balance) | Sigma-Delta (charge-balance) | Sigma-Delta (charge-balance) | Sigma-Delta (charge-balance) |
| Integrated PGIA | Yes (ultra-low-noise) | Yes (ultra-low-noise) | Yes (ultra-low-noise) | Yes (ultra-low-noise) | Yes (ultra-low-noise) | Yes (ultra-low-noise) |
| Interface | SPI serial | SPI serial | SPI serial | SPI serial | SPI serial | SPI serial |
| Operating Temperature | -40C to +85C | -40C to +85C | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Packaging Option | Tube | Tape & Reel | Tube | Tube | Tube | Tape & Reel |
Key Differentiators
- Full 24-bit resolution in the family (vs CS5533-ASZ)
- Cost-effective two-channel multiplexing (vs CS5534-ASZR)
- Integrated ultra-low-noise PGIA (vs AD7705)
Design Notes
Partition the board into quiet analog and digital regions before placing the CS5532-ASZ. Keep the differential input traces (AIN pairs) short, matched, and away from SPI clock/data lines; guard them with a grounded trace on both sides. Decouple the analog supply and reference pins with 100 nF ceramic capacitors placed within 2 mm of the pins, supplemented by a 10 uF bulk capacitor. Join analog and digital grounds at a single star point under or near the converter. The 20-SSOP leadframe conducts board-level thermal gradients into the die - keep heat sources (regulators, drivers) distant to limit offset drift.
The charge-balance sigma-delta core averages noise over the conversion window, so choose the slowest word rate your application tolerates to maximize noise-free bits. Use ratiometric wiring - powering the sensor bridge excitation and the ADC reference from the same source - so excitation drift cancels in the digital result. For single conversions, allow settling time after gain or channel switching before latching the result; the PGIA and the digital filter both need time to settle after a multiplexer change, and reading too early produces gain-dependent errors rather than random noise.
Verify SPI clock polarity and phase against the manufacturer datasheet timing diagram before layout sign-off - a mismatched mode often appears to work but corrupts the most significant data bits intermittently. Do not share the PGIA input pins with other functions while a conversion is running. When substituting CS5531/CS5533 16-bit family members for the CS5532, remember the output word length and register behavior differ by resolution grade; firmware word-parsing must be updated even though the footprint is pin-identical.
Compliance Information
Compliance status not stated in the provided verified web data; confirm RoHS/REACH status on the Cirrus Logic product page or distributor compliance certificates.
