CS5521-AP - 16-Bit Sigma-Delta ADC | Cirrus Logic
Référence : CS5521-AP ✗ Fin de vieCS5521-AP Présentation
An analog-to-digital converter, or ADC, converts continuous analog voltage into a digital representation for processing, storage, or control. The sigma-delta ADC belongs to the delta-sigma converter family, a subcategory of data-converter and signal-processing integrated circuits. Its architecture favors high resolution and noise performance over conversion speed, which makes it especially effective for slowly changing signals from resistive bridges, thermocouples, pressure sensors, and other low-bandwidth instrumentation sources.
The CS5521 family is identified by 16-bit resolution for the CS5521 and CS5523 devices, compared with 24-bit resolution in the related CS5522, CS5524, and CS5528 devices. The CS5521 provides a two-channel configuration, while the family supports two-, four-, and eight-channel variants. Its integrated low-input-current and chopper-stabilized instrumentation amplifier simplifies front-end design by reducing the need for separate low-noise amplification stages.
The charge-balance conversion technique supports precise measurement of low-level analog signals and enables digital filtering to suppress out-of-band noise. Digital filtering also increases the effective time required for a converted result to settle. Designers should therefore distinguish between sample rate, output-data rate, digital-filter settling time, and the rate at which each input can be updated. The 20-pin PDIP package is suited to through-hole industrial and instrumentation assemblies where a larger package and easy inspection are acceptable.
Typical uses include weighing systems, process-control transmitters, temperature measurement, pressure sensing, bridge-based transducers, laboratory measurement equipment, and multichannel industrial monitoring. In these systems, the ADC converts the differential output of a sensor or resistive bridge into a digital code while its instrumentation amplifier provides programmable gain close to the sensor.
Primary design considerations include choosing compatible input and reference voltages, observing the required filter settling time, and protecting analog inputs from transients. The reference voltage and analog front-end design directly influence accuracy, while bypassing and grounding determine whether the converter reaches its intended noise performance.
This product page combines the manufacturer's family description with verified package, resolution, channel-count, and cross-reference information, then adds application guidance and engineering considerations that help distinguish the CS5521 from related Cirrus Logic converter options.
Alternatives de remplacement direct pour CS5521-AP — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
CS5522-AP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CS5523-AP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CS5524-AP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CS5521-AP Valeurs maximales et caractéristiques électriques
| Converter Type | Sigma-delta analog-to-digital converter |
| Résolution | 16 bit |
| Conversion Architecture | Charge-balance delta-sigma |
| Channel Count | 2 channels |
| Analog Input Count | 4 inputs |
| Integrated Front End | Low-input-current, chopper-stabilized programmable-gain instrumentation amplifier |
| Boîtier | 20-pin PDIP |
| Type de montage | Through-hole |
| Family Overview | CS5521, CS5522, CS5523, CS5524, and CS5528 |
| Supported Family Channel Counts | 2, 4, and 8 channels |
| Supported Family Resolutions | 16 bit and 24 bit |
Guide de configuration des broches du CS5521-AP 20-pin pdip
Configuration des broches du CS5521-AP (boîtier 20-pin pdip). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour CS5521-AP.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
CS5521-AP convient pour 6 applications: Load-Cell and Weighing Systems, Pressure and Force Transducers, Industrial Process Monitoring, Temperature and Thermocouple Instrumentation, Laboratory and Portable Instruments, Precision Data Acquisition.
Load-Cell and Weighing Systems
The CS5521-AP is well suited to load-cell and weighing systems because its integrated low-input-current, chopper-stabilized programmable-gain instrumentation amplifier can process small differential signals near the sensor. Its 16-bit resolution provides 65,536 nominal code levels, while the two-channel architecture can support two bridge inputs when configured as differential pairs. The sigma-delta front end emphasizes low-noise measurement rather than high-speed sampling. Designers should place the converter and analog network to minimize interference, verify the digital-filter settling time, and confirm the reference and excitation requirements in the datasheet before fixing the acquisition rate.
Recommandé
Pressure and Force Transducers
The CS5521-AP can digitize bridge outputs from pressure, force, and displacement transducers without a separate low-noise analog amplifier. Its 16-bit resolution is suitable for many industrial sensor systems in which small differential inputs must be amplified close to the transducer, and the chopper-stabilized instrumentation amplifier helps reduce low-frequency error. The 20-pin PDIP package also supports through-hole instrumentation assemblies. The principal trade-off is conversion latency, so acquisition timing must be matched to the digital-filter settling behavior and the mechanical signal bandwidth of the sensor.
Recommandé
Industrial Process Monitoring
The CS5521-AP provides a precise conversion function for industrial process monitoring equipment that measures slow-changing pressure, temperature, level, or flow signals. Two channels can be allocated to separate differential sensors or suitable single-ended measurements, while 16-bit resolution supports detailed process-control data. Its integrated instrumentation amplifier reduces the analog-chain complexity commonly encountered with low-level sensor signals. Because the converter is optimized through the delta-sigma charge-balance architecture rather than high-rate sampling, the control loop must allow for output filtering and settling. Reference stability and analog grounding remain central to repeatable measurements.
Recommandé
Temperature and Thermocouple Instrumentation
The CS5521-AP can support temperature instrumentation when the selected thermocouple or resistance sensor is paired with an appropriate low-noise front end and cold-junction compensation. Its 16-bit resolution is useful for resolving small temperature-related voltage changes, while the integrated programmable-gain amplifier helps bring the sensor signal into the converter’s measurement range. The device is better suited to stable, low-bandwidth temperature readings than rapid thermal transients. Designers should calculate the required settling time from the datasheet’s digital-filter data and verify that the selected gain, reference voltage, and input topology meet the required accuracy.
Recommandé
Laboratory and Portable Instruments
The CS5521-AP is appropriate for laboratory and portable instruments that measure low-level analog quantities and require deterministic digital output rather than high-frequency waveform capture. Its two-channel sigma-delta conversion, 16-bit resolution, and integrated programmable-gain instrumentation amplifier can simplify a compact measurement front end. The 20-pin PDIP package is practical for prototypes, educational assemblies, and through-hole instrument boards. Designers should account for the settling interval before interpreting a converted result and should use careful reference bypassing and grounding to preserve repeatability. For four sensors or finer resolution, the related CS5523 and CS5522 family members offer alternatives.
Recommandé
Precision Data Acquisition
The CS5521-AP can serve as the central converter in a precision data-acquisition system for low-frequency analog sensors. Its 16-bit resolution, two-channel architecture, and integrated instrumentation amplifier provide a compact route from differential sensor outputs to digital measurement data. The charge-balance sigma-delta architecture supports narrowband precision measurement where rejecting out-of-band noise is more important than acquiring high-frequency waveforms. System designers should synchronize acquisition with the converter’s digital-filter timing and verify the usable output-data rate. Stable references, protected inputs, and careful grounding are needed to preserve the benefit of the 16-bit conversion resolution.
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Récapitulatif des produits recommandés
Données de référence d'ingénierie pour CS5521-AP — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | CS5522-AP | CS5523-AP | CS5524-AP |
|---|---|---|---|---|
| Package | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Resolution | 16 bit | 24 bit | 16 bit | 24 bit |
| Channel Count | 2 channels | 2 channels | 4 channels | 4 channels |
| Conversion Architecture | Charge-balance delta-sigma | Charge-balance delta-sigma | Charge-balance delta-sigma | Charge-balance delta-sigma |
| Integrated Amplifier | Low-input-current, chopper-stabilized PGIA | Low-input-current, chopper-stabilized PGIA | Low-input-current, chopper-stabilized PGIA | Low-input-current, chopper-stabilized PGIA |
| Lifecycle Status | Obsolete | Discontinued family | Discontinued family | Discontinued family |
Principaux différenciateurs
- Higher-resolution option in the same two-channel family position (vs CS5522-AP)
- Twice the channel count at the same nominal resolution (vs CS5523-AP)
- Combined resolution and channel-count expansion (vs CS5524-AP)
Notes de conception
Treat the reference source, analog inputs, and digital interface as separate high-impedance and current-return paths. Place reference bypass components at the converter pins, maintain a continuous ground reference, and route sensor inputs away from switching or high-current traces. The integrated chopper-stabilized instrumentation amplifier reduces some low-frequency errors, but poor grounding and reference ripple can still undermine the usable resolution of this 16-bit converter.
Do not select the output update interval from the nominal converter resolution alone. Sigma-delta acquisition includes digital filtering and settling, so the application must allow the output to settle after changing the input or gain. Use the manufacturer’s timing and filter tables to define a valid sampling sequence; otherwise, successive measurements may contain stale or partially settled results.
Use the 20-pin PDIP footprint and verify every connection against the manufacturer pin-description table before fabrication. Keep analog input traces short, avoid routing them beneath digital clock or interface paths, and provide local reference bypassing. Although the through-hole package is convenient for prototyping, lead spacing and exposed analog pins should be checked against the physical sensor connector and enclosure layout.
Confirm the converter’s analog and digital supply requirements, sequencing, and permitted operating ranges before assigning power rails. Decouple each required supply at the package and keep return currents controlled so switching-supply residue does not share the analog ground path. Reference-voltage stability directly influences conversion accuracy, so reference-source impedance and bypass capacitance should be selected according to the manufacturer’s guidance.
Informations de conformité
No definitive RoHS, REACH, lead-free, halogen-free, or conflict-minerals status was established from the verified records. AEC-Q100 is not applicable to this general-purpose industrial converter.