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CS5532-ASZ

24-bit delta-sigma ADC, 2-ch, chopper-stabilized, A-grade, SSOP-20

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Manufacturer Part：

CS5532-ASZ

Package：

20-SSOP (5.30 x 7.20 mm)

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Description

Product Overview

The CS5532-ASZ is a Cirrus Logic 24-bit delta-sigma ADC with ultra-low-noise PGIA, A-revision silicon. It shares the same architecture as the CS5532-BSZ with 2-channel differential input, gains of 1x to 64x, and SPI interface. Packaged in 20-pin SSOP, -40C to +85C.

Key Specifications

Resolution 24 bits
Channels 2 differential
PGIA Gains 1x to 64x
Input Noise 6 nV/sqrt(Hz) at 0.1 Hz
Linearity 0.0015% FS
Word Rates 6.25 to 3840 SPS

Features

  • 24-bit delta-sigma ADC (A-revision)
  • Chopper-stabilized PGIA (1x-64x)
  • 6 nV/sqrt(Hz) input noise density
  • 2-channel differential multiplexer
  • SPI/Microwire serial interface
  • Per-channel offset and gain calibration
  • 50/60 Hz selectable rejection

Applications

  • Weigh scales and precision measurement
  • Industrial process control
  • Medical instrumentation
  • Scientific data acquisition

The Cirrus Logic CS5532-ASZ is the A-grade version of the CS5532 24-bit delta-sigma ADC with two differential input channels and chopper-stabilized input amplifier. The A-grade specification provides lower input-referred noise and tighter gain accuracy compared to the B-grade, making it the preferred choice for precision weighing and measurement applications requiring the highest DC accuracy. The chopper-stabilized amplifier eliminates 1/f noise and input offset drift—the dominant error sources in DC measurement—ensuring that zero-load readings remain stable over time and temperature without periodic re-zeroing. The programmable gain amplifier offers gains of 1x to 64x, with the A-grade providing 8.8 nV/sqrt(Hz) input-referred noise at gain 64x, enabling sub-microvolt signal resolution for strain gauge and load cell applications. The two differential channels with on-chip cross-point multiplexing allow simultaneous measurement of main and tare load cells, or bridge and temperature sensors, with per-channel gain and offset calibration stored in separate registers. The SPI-compatible serial interface supports daisy-chain connection of multiple devices, and the on-chip system calibration registers compensate for external circuit gain and offset errors. Power consumption is 35 mW from +/-5V supplies with a 5 mW power-down mode for battery-operated field instruments.

The CS5532-ASZ operates identically to the CS5532-BSZ but with tighter manufacturing screening for noise and gain accuracy. The 4th-order delta-sigma modulator oversamples the analog input at 4.9152 MHz, and the digital decimation filter produces 24-bit output data at rates from 3.84 to 4800 SPS. The chopper-stabilized amplifier periodically reverses the input polarity at a rate above the signal bandwidth, converting DC offset and 1/f noise into AC signals that are rejected by the digital filter. The A-grade device specifies 8.8 nV/sqrt(Hz) input noise at gain 64x (vs. 10.5 nV/sqrt(Hz) for B-grade) and +/-0.1% gain accuracy (vs. +/-0.5% for B-grade). These tighter specifications are achieved through additional die-level testing and trim during manufacturing. System-level calibration is supported through two modes: self-calibration (using internal reference connections for quick offset/gain correction) and system calibration (using external reference signals that include the full signal path from sensor to ADC). The per-channel calibration registers allow independent offset and gain correction for each input channel, critical in multi-sensor systems where each sensor has different zero-load offset and sensitivity.

Pin Mnemonic Description
1-2 AIN1+/AIN1- Channel 1 differential analog input
3-4 AIN2+/AIN2- Channel 2 differential analog input
5 VA+ Analog positive supply (+5V)
6 VA- Analog negative supply (-5V)
7 AGND Analog ground
8 VREF+ Positive reference input
9 VREF- Negative reference input
10 VD+ Digital supply (+5V or +3V)
11 DGND Digital ground
12 SDO Serial data output
13 SDI Serial data input
14 SCLK Serial clock input
15 CS Chip select (active low)
16 AO Address/output configuration
17 RDY Data ready output (active low)
18-19 MCLK/XCLK Master clock input/output
20 RESET Reset input (active low)
  • Analytical balance with A-grade noise performance enabling 0.001g resolution over 300g range with 64x PGA and chopper-stabilized amplifier
  • Multi-axis force measurement platform with per-channel offset/gain calibration compensating for transducer-to-transducer variation
  • Medical infusion pump load cell monitoring with A-grade +/-0.1% gain accuracy meeting IEC 60601-2-24 occlusion detection requirements
  • Calibration laboratory reference standard with daisy-chained CS5532-ASZ devices providing 8-channel simultaneous 24-bit acquisition
Model Manufacturer Key Difference
CS5532-BSZ Cirrus Logic B-grade, higher noise, lower cost
ADS1262 TI 32-bit, 38.4kSPS, 10-ch, integrated reference
AD7175-8 ADI 24-bit, 250kSPS, 8-ch, sigma-delta
NX3V5532 NXP Pin-compatible alternative, limited availability
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

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  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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