CS5532-ASZR - 24-bit Sigma-Delta ADC, PGIA | Cirrus Logic
MPN: CS5532-ASZR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.43 | $12.43 |
| 10 | $11.3 | $113.00 |
| 100 | $10.2 | $1,020.00 |
| 500 | $9.35 | $4,675.00 |
| 1,000 | $8.65 | $8,650.00 |
Drop-in alternatives for CS5532-ASZR — 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-BSZ
✅ Drop-In✓ In Stock
$4.03 / Unit
View Datasheet →CS5532-BSZR
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$5.8 / Unit
View Datasheet →CS5533-ASZR
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →CS5534-ASZR
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →CS5534-BSZ
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Contact for price
View Datasheet →CS5530-ISZ
✅ Drop-In📋 Reference alternative (not in catalog)
CS5531-ASZ
✅ Drop-In✓ In Stock
$3.98 / Unit
View Datasheet →CS5532-ASZR Maximum Ratings & Electrical Characteristics
| Resolution | 24 bit |
| Number of Input Channels | 2 differential inputs |
| Converter Type | Sigma-Delta (charge-balance) |
| Maximum Output Rate | 3.84 kSPS |
| Amplifier | Integrated ultra-low-noise PGIA |
| Input Type | Differential (unipolar or bipolar) |
| Interface | Serial (SPI-compatible) |
| Package | 20-pin SSOP |
| Operating Temperature | -40C to +85C |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| Typical Applications | Weigh scale, process control, scientific, medical |
CS5532-ASZR 20-pin ssop Pin Configuration Guide
Complete pinout information for CS5532-ASZR (20-pin 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-ASZR.
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-ASZR is suitable for 6 applications: Weigh Scale / Load-Cell Measurement, Industrial Process Control Transmitters, Scientific and Laboratory Instrumentation, Medical Measurement Equipment, Precision Data Acquisition Systems, Battery-Powered Portable Instruments.
Weigh Scale / Load-Cell Measurement
The CS5532-ASZR is explicitly optimized by Cirrus Logic for weigh scale applications, where load-cell bridges output only a few millivolts per volt of excitation. Its integrated ultra-low-noise PGIA accepts these microvolt-level differential signals directly, and 24-bit charge-balance conversion resolves the tiny increments required for high-division-count commercial scales. Placed between the load cell and the MCU serial bus, the ADC performs self and system calibration to cancel offset and gain drift, maintaining accuracy over temperature. Because the PGIA replaces a discrete instrumentation amplifier, total front-end noise is lower and board area is reduced - the key reason this family dominates precision weighing platforms.
Recommended
Industrial Process Control Transmitters
In process control, low-level signals from thermocouples, RTD bridges, and pressure sensors must be digitized with high accuracy near motors and switching supplies. The CS5532-ASZR's 24-bit charge-balance sigma-delta modulator and ultra-low-noise PGIA provide the resolution headroom for 4-20 mA transmitter designs, while its two differential channels let one device sample both a sensor and a reference or diagnostic channel. The -40C to +85C A-grade temperature range covers field-mounted transmitter enclosures. Digital filtering attenuates mains-frequency interference (50/60 Hz), improving signal integrity in electrically noisy industrial environments without additional analog filtering stages.
Recommended
Scientific and Laboratory Instrumentation
Scientific instruments - electrometers, photometers, and analytical sensors - require digitization of slow, extremely small differential signals where quantization and amplifier noise set the detection floor. The CS5532-ASZR's charge-balance techniques achieve 24-bit performance specifically for these low-level unipolar or bipolar signals. The serial (SPI-compatible) interface connects cleanly to microcontroller-based data-acquisition boards, and calibration routines performed at startup remove system offset and gain error before each measurement campaign. Running the converter at low word rates maximizes noise-free resolution, so instruments prioritize precision over the 3.84 kSPS maximum rate, which is ample for quasi-static phenomena.
Recommended
Medical Measurement Equipment
Medical instrumentation named by Cirrus Logic for the CS5532/34 family includes diagnostic measurement devices where sensor outputs are millivolt-level and signal fidelity is safety- and accuracy-critical. The ultra-low-noise PGIA amplifies weak transducer signals without adding the noise of a discrete front-end, and the sigma-delta architecture's oversampling naturally suppresses out-of-band interference from nearby equipment. The two differential input channels support ratiometric measurements against a common reference, canceling excitation drift. Designers should still apply the appropriate medical-system isolation strategy external to the ADC, since the CS5532-ASZR itself is not a patient-isolation barrier.
Recommended
Precision Data Acquisition Systems
General-purpose DAQ front ends benefit from the CS5532-ASZR's combination of 24-bit resolution, two multiplexed differential channels, and an SPI-compatible serial interface that integrates directly with standard MCUs. A single device digitizes two bridge or differential sensor inputs with per-channel gain settings from the PGIA, replacing an amplifier-plus-ADC cascade and simplifying calibration firmware. The 3.84 kSPS maximum output rate suits thermal, pressure, and weight monitoring, while the charge-balance modulator delivers stable, drift-tolerant readings over the -40C to +85C range required in distributed industrial DAQ nodes and remote telemetry equipment.
Recommended
Battery-Powered Portable Instruments
Portable measurement instruments such as handheld scales, battery testers, and environmental meters benefit from the CS5532-ASZR's low-level signal capability within a compact 20-pin SSOP footprint. The sigma-delta architecture converts at low average power for slow-sampling applications, and the integrated PGIA removes the quiescent current of an external instrumentation amplifier, extending battery life relative to discrete front ends. The serial interface uses few MCU pins, and one-shot conversion control lets the system wake, sample, calibrate, and return to sleep. Designers should consult the datasheet supply-current figures to model battery budgets accurately for their selected word rate.
Recommended
Recommended Products Summary
Engineering reference data for CS5532-ASZR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CS5532-BSZR | CS5534-ASZR | CS5530-ISZ | CS5531-ASZ |
|---|---|---|---|---|---|
| Package | 20-pin SSOP | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 16 bit |
| Input Channels | 2 differential | 2 differential | 4 differential | 2 differential | 2 differential |
| Integrated PGIA | Yes (ultra-low-noise) | Yes | Yes | No | Yes |
| Max Output Rate | 3.84 kSPS | 3.84 kSPS | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Operating Temperature | -40C to +85C | [DATA_NEEDED] | -40C to +85C | -40C to +85C (I grade) | [DATA_NEEDED] |
| Packaging | Tape & Reel | Tape & Reel | Tape & Reel | Tube (66 units) | Tube |
Key Differentiators
- Integrated ultra-low-noise PGIA (vs CS5530-ISZ)
- Full 24-bit resolution at same footprint (vs CS5533-ASZR)
- Two-channel multiplexed differential inputs (vs CS5534-ASZR)
Design Notes
The CS5532-ASZR's 24-bit resolution is only realized with a quiet analog front end. Route the differential input traces as tightly coupled pairs, place a small RC differential filter (e.g., 100 ohm / 0.1 uF, verify against the datasheet input impedance) at AIN1/AIN2, and keep switching regulators away from the analog ground region. Use a low-noise reference because reference noise appears directly in the output code; the PGIA gain multiplies both signal and input-referred noise, so higher gains require proportionally cleaner sources.
Do not assume 3.84 kSPS is the usable rate at full resolution: the converter's word-rate setting trades speed for noise-free bits, and precision weigh-scale designs typically run far below the maximum rate. Also budget time for self/system calibration after power-up and after gain changes - skipping calibration leaves offset and gain errors in the result. Verify grade suffix (A vs B) limits before substituting CS5532-BSZR in a qualified design.
Use a solid analog ground plane under the CS5532-ASZR and star-connect analog and digital grounds at a single point. Place 100 nF ceramic decoupling capacitors within 2-3 mm of each supply pin, with bulk capacitance nearby. Keep the crystal (for the conversion clock) leads short and guard it from digital serial lines. Reference the manufacturer datasheet's typical application circuit before finalizing layout; it reflects Cirrus Logic's validated decoupling and grounding scheme.
Compliance Information
Compliance status not stated in the provided web data; verify against the Cirrus Logic product page or distributor compliance documents before design-in.
