CS5533-ASZ - 16-Bit 4-Ch Sigma-Delta ADC with PGIA | Cirrus Logic
MPN: CS5533-ASZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.13 | $3.13 |
| 10 | $2.91 | $29.10 |
| 100 | $2.68 | $268.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.25 | $2,250.00 |
Drop-in alternatives for CS5533-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:
CS5533-BSZ
✅ Drop-In📋 Reference alternative (not in catalog)
CS5534-ASZR
✅ Drop-In✓ In Stock
$3.55 / Unit
View Datasheet →CS5534-BSZ
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Contact for price
View Datasheet →CS5534-ASZR
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$3.55 / Unit
View Datasheet →CS5532-BSZ
✅ Drop-In✓ In Stock
$4.03 / Unit
View Datasheet →CS5532-ASZ
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →CS5533-ASZ Maximum Ratings & Electrical Characteristics
| Resolution | 16 bit |
| Number of Input Channels | 4 (differential, multiplexed) |
| Converter Type | Sigma-Delta (delta-sigma) |
| Integrated Amplifier | Ultra-low-noise PGIA (chopper-stabilized) |
| PGIA Gain Settings | 1x, 2x, 4x, 8x, 16x, 32x, 64x |
| Amplifier Input Noise | 6 nV/sqrt(Hz) at 0.1 Hz |
| Supply Voltage | +5 V single supply, or +/-2.5 V / +/-3 V dual supply |
| Package | 24-SSOP |
| Mounting Type | Surface Mount |
| Interface | Serial (SPI-compatible) |
| Product Family | CS5531/CS5532/CS5533/CS5534 |
CS5533-ASZ 24-ssop Pin Configuration Guide
Complete pinout information for CS5533-ASZ (24-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 CS5533-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
CS5533-ASZ is suitable for 6 applications: Weigh Scale / Load Cell Front End, Thermocouple Temperature Measurement, RTD and Precision Process Sensing, Battery Test and Formation Systems, Industrial Data Acquisition / PLC Analog Input, Medical Instrumentation Signal Acquisition.
Weigh Scale / Load Cell Front End
The CS5533-ASZ fits weigh-scale designs because its chopper-stabilized PGIA provides 6 nV/sqrt(Hz) noise at 0.1 Hz with gains up to 64x, allowing direct connection of a few-mV full-scale load-cell bridge without an external precision amplifier. The sigma-delta converter's linear-phase digital filter attenuates 50/60 Hz mains interference that dominates scale installations, and self-calibration removes offset and gain drift over temperature. In a typical circuit the bridge excitation drives the ADC reference for ratiometric operation, cancelling excitation drift. The trade-off versus a 24-bit CS5534 is lower noise-free resolution, adequate for most commercial and industrial scale accuracy classes.
Recommended
Thermocouple Temperature Measurement
The CS5533-ASZ suits thermocouple acquisition because type J/K/T thermocouples produce tens of microvolts per degree C, and the PGIA's 6 nV/sqrt(Hz) input noise at 0.1 Hz keeps quantization and amplifier noise below one measurement LSB at moderate gain settings. The +/-2.5 V or +/-3 V dual-supply mode accommodates bipolar input signals around ground, simplifying cold-junction offset handling. Four multiplexed differential channels let one CS5533-ASZ scan multiple thermocouples plus an ambient reference channel, reducing BOM cost in multi-point monitoring. Chopper stabilization eliminates 1/f noise and offset drift, the dominant errors in DC-coupled thermocouple systems.
Recommended
RTD and Precision Process Sensing
For RTD measurement the CS5533-ASZ pairs naturally with ratiometric excitation: a single current or voltage source drives both the RTD and the ADC reference, so reference drift cancels in the digital result. The PGIA's selectable gains (1x to 64x) match the small voltage change per degree across a 100-ohm platinum element, and the chopper-stabilized input stage suppresses thermal EMF errors at connector junctions. In process-control front ends the 16-bit resolution with self-calibration supports typical 0.1% loop accuracy. Linear-phase digital filtering preserves waveform shape for transient events while rejecting mains interference at 50 and 60 Hz.
Recommended
Battery Test and Formation Systems
Battery testers require microvolt-level voltage measurement across cells while handling common-mode voltages, and the CS5533-ASZ addresses this with its differential PGIA inputs, 64x maximum gain, and 16-bit resolution with self-calibration to remove drift between test cycles. The four multiplexed differential channels allow sequential monitoring of multiple cell taps or sense points with one converter, cutting channel cost in multi-cell fixtures. The sigma-delta oversampling architecture averages charge-injection and noise over the conversion window, improving repeatability in long-duration charge/discharge integration tests. Chopper stabilization keeps offset stable over the minutes-to-hours timescales of formation cycling.
Recommended
Industrial Data Acquisition / PLC Analog Input
The CS5533-ASZ works as a compact multi-channel analog front end for PLC and DAQ modules: four differential inputs with software-selectable gains let one IC condition 4-20 mA shunt signals, bridge sensors, and low-level thermocouples alike. The serial SPI-compatible interface integrates with any MCU, and register-configurable output word rates trade speed against resolution to match each channel's needs. Its +5 V single-supply mode simplifies the industrial 5 V power tree. Compared with discrete PGA-plus-ADC solutions, the integrated chopper-stabilized PGIA removes inter-component offset errors and saves board area in dense I/O cards.
Recommended
Medical Instrumentation Signal Acquisition
Low-level biopotential and physiological sensor signals benefit from the CS5533-ASZ's 6 nV/sqrt(Hz) chopper-stabilized amplifier, which keeps input-referred noise far below typical sensor signal levels over the DC-to-low-frequency band of interest. Gains from 1x to 64x allow front-end scaling for bridge-based pressure sensors, and the linear-phase digital filter avoids waveform distortion in measured physiological transients. Multiplexed differential channels support multi-sensor patient or laboratory instruments with a single converter, while self-calibration maintains DC accuracy without manual trimming. Designers must observe the applicable medical electrical safety standards for patient-connected circuits in the surrounding system.
Recommended
Recommended Products Summary
Engineering reference data for CS5533-ASZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CS5533-BSZ | CS5534-ASZ | CS5534-BSZ | CS5532-BSZ |
|---|---|---|---|---|---|
| Package | 24-SSOP | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Resolution | 16 bit | 16 bit | 24 bit | 24 bit | [DATA_NEEDED] |
| Input Channels | 4 differential | 4 differential | 4 differential | 4 differential | 2 differential |
| PGIA Gain Range | 1x to 64x | 1x to 64x | 1x to 64x | 1x to 64x | 1x to 64x |
| Amplifier Noise | 6 nV/sqrt(Hz) at 0.1 Hz | 6 nV/sqrt(Hz) at 0.1 Hz | 6 nV/sqrt(Hz) at 0.1 Hz | 6 nV/sqrt(Hz) at 0.1 Hz | 6 nV/sqrt(Hz) at 0.1 Hz |
| Supply Voltage | +5 V or +/-2.5 V / +/-3 V | +5 V or +/-2.5 V / +/-3 V | +5 V or +/-2.5 V / +/-3 V | +5 V or +/-2.5 V / +/-3 V | +5 V or +/-2.5 V / +/-3 V |
| Unit Price (qty 1, as of 2026-09-13) | $3.13 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Ultra-low 1/f noise corner from chopper-stabilized PGIA (vs CS5532-BSZ)
- Cost-optimized 16-bit resolution (vs CS5534-ASZ)
- Family-based second sourcing with zero hardware change (vs CS5534-BSZ)
Design Notes
Treat the analog input section as a low-level differential domain. Route AIN pairs as tightly coupled traces away from the SCLK/SDI/SDO serial bus, and use a solid analog ground plane under the converter. Place 100 nF ceramic decoupling capacitors directly at the supply, reference, and PGIA input pins, with bulk capacitance near the part. Per the Cirrus Logic CS5531/32/33/34 family documentation, the chopper-stabilized amplifier achieves 6 nV/sqrt(Hz) at 0.1 Hz only when supply and reference noise are kept low.
Power the CS5533-ASZ from a quiet linear or well-post-regulated rail. A switching converter placed upstream without adequate LC filtering will couple ripple into the PGIA through supply rejection limits and raise the noise floor well above the datasheet characteristic. If a single +5 V rail is used, remember dual-supply mode (+/-2.5 V or +/-3 V) is available when bipolar sensor signals must swing around ground. Estimated: a series ferrite plus 10 uF/100 nF decoupling typically provides sufficient broadband isolation for this converter class.
Do not evaluate resolution at the headline 16-bit figure alone: effective noise-free resolution depends on the selected PGIA gain and output word rate, per the manufacturer family documentation. Also confirm the exact temperature-grade suffix when sourcing - CS5533-ASZ and CS5533-BSZ share the same die but differ in grade, and distributors list both. Finally, remember no cross-brand pin-to-pin replacement exists; the TI ADS1248 requires firmware and PCB changes, so second-source strategy should rely on CS5534/CS5532 family members.
Compliance Information
Compliance data was not present in the provided web data. Consult the Cirrus Logic product page or distributor environmental listings for RoHS/REACH status.
