CS5532-BSZR - 24-Bit Delta-Sigma ADC with PGIA | Cirrus Logic
MPN: CS5532-BSZR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.4 | $8.40 |
| 10 | $7.7 | $77.00 |
| 100 | $6.95 | $695.00 |
| 500 | $6.3 | $3,150.00 |
| 1,000 | $5.8 | $5,800.00 |
Drop-in alternatives for CS5532-BSZR — 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-ASZR
✅ Drop-In✓ In Stock
$8.65 / Unit
View Datasheet →CS5532-ASZ
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →CS5534-BSZR
✅ Drop-In✓ In Stock
$8.5 / Unit
View Datasheet →CS5531-BSZ
✅ Drop-In📋 Reference alternative (not in catalog)
CS5531-ASZ
✅ Drop-In✓ In Stock
$3.98 / Unit
View Datasheet →ADS1232IPWR
✅ Drop-In📋 Reference alternative (not in catalog)
CS5532-BSZR Maximum Ratings & Electrical Characteristics
| Resolution | 24 bit |
| Number of Input Channels | 2 differential |
| Architecture | Delta-Sigma (charge-balance) with PGIA |
| Maximum Output Data Rate | 3.84 kSPS |
| PGA Gains | 1x, 2x, 4x, 8x, 16x, 32x, 64x |
| Interface Type | Serial (SPI-compatible, 3-wire) |
| Analog Supply (VA+) | +5 V |
| Analog Supply (VA-) | -5 V |
| Digital Supply (VD) | 3.3 V to 5 V |
| Reference Input | Differential (VREF+ / VREF-) |
| Calibration | Self and system calibration (offset and gain) |
| Clock Source | External crystal (XIN / XOUT) |
| Package | 20-SSOP |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (R suffix) |
| RoHS Status | Compliant (Z suffix) |
| Typical Applications | Weigh scale, process control, scientific, medical |
CS5532-BSZR Pin Configuration
| Pin 1 | XIN — Crystal oscillator input |
| Pin 2 | XOUT — Crystal oscillator output |
| Pin 3 | CS — Chip select for serial port (active low) |
| Pin 4 | SDI — Serial data input |
| Pin 5 | SDO — Serial data output |
| Pin 6 | SCLK — Serial clock input |
| Pin 7 | A0 — Address / channel select input 0 |
| Pin 8 | A1 — Address / channel select input 1 |
| Pin 9 | GND — Ground |
| Pin 10 | VD — Digital supply (3.3 V to 5 V) |
| Pin 11 | C2 — External capacitor connection (internal regulator/charge pump decoupling) |
| Pin 12 | C1 — External capacitor connection (internal regulator/charge pump decoupling) |
| Pin 13 | VA- — Negative analog supply (-5 V) |
| Pin 14 | AIN1- — Differential analog input 1, negative |
| Pin 15 | AIN1+ — Differential analog input 1, positive |
| Pin 16 | AIN2- — Differential analog input 2, negative |
| Pin 17 | AIN2+ — Differential analog input 2, positive |
| Pin 18 | VREF- — Differential reference input, negative |
| Pin 19 | VREF+ — Differential reference input, positive |
| Pin 20 | VA+ — Positive analog supply (+5 V) |
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-BSZR is suitable for 6 applications: Weigh Scales and Load Cell Front Ends, Industrial Process Control Transmitters, Medical and Patient Monitoring Instrumentation, Scientific and Laboratory Measurement, Temperature Measurement with RTDs and Thermocouples, Precision Voltage and Current Measurement Modules.
Weigh Scales and Load Cell Front Ends
The CS5532-BSZR is purpose-built for weigh scale applications: its 24-bit delta-sigma core resolves microvolt-level load cell outputs (typically 2 mV/V full scale), while the integrated PGIA with gains from 1x to 64x lets a single design cover both low-capacity and high-capacity scales. The differential reference input (VREF+ / VREF-) enables true ratiometric measurement against bridge excitation, canceling supply drift and achieving 0.01% class accuracy without a precision excitation source. On-chip self and system calibration removes offset and gain error from the load cell and PCB at power-up or on command. Place the ADC close to the load cell connector, use Kelvin sensing of the excitation to the reference, and set the gain so the bridge full-scale output uses most of the converter input range for maximum effective resolution.
Recommended
Industrial Process Control Transmitters
In 4-20 mA loop-powered transmitters, pressure and temperature sensors produce small differential signals that the CS5532-BSZR digitizes with 24-bit resolution at data rates up to 3.84 kSPS - far above typical process loop update needs, allowing heavy averaging for noise rejection. The 2-channel differential mux lets one ADC alternate between, for example, a pressure sensor and an internal diagnostic channel (cold junction or loop voltage) without an external multiplexer. The PGIA accommodates sensors of differing sensitivity, and the SPI-compatible serial port interfaces directly to low-power MCUs. The differential analog inputs provide high common-mode rejection against ground potential differences in industrial plants, while self-calibration compensates for long-term drift, keeping transmitter accuracy stable between service intervals.
Recommended
Medical and Patient Monitoring Instrumentation
Medical instruments such as patient monitors, blood analyzers, and non-invasive diagnostic devices require resolving very small biopotential or sensor signals while rejecting power-line interference - a match for the CS5532-BSZR's ultra-low-noise PGIA and charge-balance delta-sigma architecture. The differential inputs reject common-mode 50/60 Hz interference, and the programmable data rate lets designers trade bandwidth for resolution (low rates yield the highest effective resolution). The dual +5 V / -5 V analog supply accommodates bipolar sensor and biopotential signals without additional level shifting. On-chip system calibration supports the periodic recalibration routines required by medical device quality systems, and the 20-SSOP surface-mount package fits compact patient-attached hardware with good thermal behavior.
Recommended
Scientific and Laboratory Measurement
Bench instruments, data loggers, and sensor research rigs benefit from the CS5532-BSZR's ability to resolve signals below a microvolt: at low output data rates the delta-sigma digital filter averages heavily, pushing effective resolution toward the 23-bit level. The 2 differential channels allow simultaneous monitoring of a measurement signal and a reference or compensation channel. The flexible PGIA (1x to 64x) lets one instrument front end span sensor outputs from millivolts to volts without a range switch. The SPI-compatible port makes integration with microcontrollers or FPGA-based acquisition systems straightforward, and the differential reference input supports ratio measurements (sensor divided by excitation) that eliminate reference drift in precision laboratory setups.
Recommended
Temperature Measurement with RTDs and Thermocouples
RTD and thermocouple channels demand both high resolution and low offset drift - precisely the strengths of the CS5532-BSZR. A 100-ohm platinum RTD excited at 1 mA produces roughly 0.385 ohm/C of signal change; with the PGIA set to 8x-32x gain, the 24-bit converter resolves temperature steps of millidegrees after averaging. For thermocouples, the 2-channel mux can read the thermocouple on channel 1 and an RTD or ambient sensor on channel 2 for cold-junction compensation within the same IC. Ratiometric wiring of the RTD excitation into VREF+ / VREF- removes excitation-source drift from the measurement entirely, and periodic system calibration via the serial port eliminates residual offset in the analog switch and amplifier path.
Recommended
Precision Voltage and Current Measurement Modules
DMM-class front ends, battery test equipment, and power monitoring modules use the CS5532-BSZR where a low-cost 24-bit digitizer replaces discrete amplifier-plus-SAR chains. A shunt-based current channel is a natural fit: the PGIA's 64x gain amplifies small shunt voltages (e.g., 10 mV full scale) to use the converter's full input range, while the ultra-low input-referred noise preserves resolution at the low end of the range. The bipolar input range from the dual-supply operation handles bidirectional charge/discharge current measurement directly. At 3.84 kSPS maximum rate, one ADC can digitize both a voltage channel and a current channel sequentially fast enough for most battery cycling and monitoring applications, with averaging delivering noise-free bits.
Recommended
Recommended Products Summary
Engineering reference data for CS5532-BSZR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CS5532-BSZ | CS5532-ASZR | CS5534-BSZR | CS5531-BSZ | ADS1232IPWR |
|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-TSSOP - similar footprint, verify |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Texas Instruments |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 16 bit | 24 bit |
| Input Channels | 2 differential | 2 differential | 2 differential | 4 differential | 1 differential | 2 differential |
| Max Output Data Rate | 3.84 kSPS | 3.84 kSPS | 3.84 kSPS | 3.84 kSPS | 3.84 kSPS | 80 SPS |
| PGA Gain Range | 1x to 64x | 1x to 64x | 1x to 64x | 1x to 64x | 1x to 64x | 1x / 2x / 64x / 128x |
| Supply Topology | +5 V / -5 V analog, 3.3-5 V digital | +5 V / -5 V analog | +5 V / -5 V analog | +5 V / -5 V analog | +5 V / -5 V analog | Single 5 V, integrated reference/oscillator |
| Accuracy Grade | B grade | B grade | A grade (tighter linearity) | B grade | B grade | [DATA_NEEDED] |
| Unit Price (qty 1) | $8.40 as of 2026-09-13 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- 24-bit resolution with integrated adjustable-gain PGIA (vs CS5531-BSZ)
- Two differential channels at lowest family cost (vs CS5534-BSZR)
- Cost-optimized accuracy grade for commercial designs (vs CS5532-ASZR)
- Wide 1x-64x adjustable gain vs fixed high gain (vs ADS1232IPWR)
Design Notes
Keep the analog front end tight and symmetrical: route AIN1+/AIN1- and AIN2+/AIN2- as differential pairs, guard them with ground, and keep them away from the crystal and digital traces. Place 100 nF ceramic decoupling capacitors directly at VA+, VA-, and VD pins with short return paths to GND. The C1/C2 capacitor connections should follow the datasheet recommended values and be placed close to the pins. A solid, unsplit ground plane under the ADC is strongly recommended; avoid routing the SPI bus beneath the analog inputs.
Use ratiometric wiring: connect the sensor bridge excitation directly to VREF+ / VREF- with Kelvin sense lines so excitation drift cancels in the measurement. This is the single biggest accuracy win for load-cell designs and can eliminate the need for a costly ultra-stable voltage reference. For the clock, use a crystal with the datasheet-recommended load capacitance on XIN/XOUT; crystal frequency sets the modulator rate and therefore the actual output data rate, so budget accuracy accordingly.
Do not exceed the reference differential input range or drive the analog inputs outside the supply rails - the PGIA input has absolute maximum limits that clamp damage tolerance. Ensure supply sequencing and decoupling per the datasheet; the dual-supply topology means a missing negative rail can forward-bias internal structures. Run a self or system calibration after power-up and after any gain change; skipping calibration is the most common cause of unexpected offset error in CS5532 designs.
Estimated: the CS5532 family draws low analog supply current (single-digit mA class), so total power dissipation in the 20-SSOP package is a few tens of milliwatts - no heatsinking is required. Instead, focus power design effort on supply noise: the delta-sigma modulator is sensitive to ripple on VA+ and VA-. Use LDO supplies or well-filtered rails; a switching regulator directly on VA+ without post-filtering can raise the noise floor and reduce effective resolution below the datasheet noise specification.
Compliance Information
Z suffix in CS5532-BSZR denotes Cirrus Logic RoHS-compliant, lead-free packaging. REACH, halogen-free, and conflict minerals status not stated in provided data.
