CS5513-BS - 20-Bit Sigma-Delta ADC | Cirrus Logic
MPN: CS5513-BS ✗ End of LifeCS5513-BS Overview
A sigma-delta ADC is an analog-to-digital converter category that uses oversampling, noise shaping, and digital filtering to convert an analog input into a high-resolution digital result. Its wider internal conversion bandwidth and digital filter make it especially useful for low-bandwidth measurements where the input signal can be filtered effectively. The CS5513 family uses charge-balance techniques to provide 16-bit performance in CS5510 and CS5511 and 20-bit performance in CS5512 and CS5513.
The CS5513-BS combines a 20-bit conversion resolution, a single analog input, one sigma-delta conversion channel, and an integrated oscillator in a compact 8-pin SOIC. Its on-chip oscillator removes the need for an external clock source, reducing component count and simplifying clock implementation. The manufacturer identifies low power, flexible supply, compact pinout, and ease of use as important benefits for space-constrained and cost-sensitive designs.
Internally, the converter architecture oversamples the analog input and shapes quantization noise toward higher frequencies. A subsequent digital filter removes this shaped noise from the signal bandwidth of interest. This approach is well suited to precision measurement of relatively slow signals because it can provide high effective resolution without the complex external clock and sampling systems required by many high-speed converter architectures. Exact conversion-rate, filter, reference-voltage, and noise specifications should be confirmed in the manufacturer datasheet.
Typical uses include industrial process monitoring, sensor interface measurement, laboratory instrumentation, panel meters, data acquisition, and embedded control systems. The single-channel structure is particularly appropriate when one analog quantity must be digitized in a compact design. Because the CS5513-BS includes an oscillator, it can also simplify isolated or distributed measurement nodes where supplying a clean external reference clock would be inconvenient.
Designers should pay close attention to the analog input range, external reference requirements, digital interface timing, and the internal digital filter response before fixing the PCB layout. Place input, reference, and decoupling connections according to the datasheet's recommended application diagram. Account for the filter settling time when reading successive conversions, and verify that the source impedance and acquisition network do not distort the sampled signal.
This product page combines the manufacturer family information with distributor and datasheet references, pin-compatibility information for the CS5513-BSZ ordering variant, and practical guidance for evaluating this obsolete converter in new and legacy designs. Because the family is discontinued, engineers should also assess whether an active replacement is required before committing to a new production design.
Drop-in alternatives for CS5513-BS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
CS5513-BSZ
✅ Drop-In📋 Reference alternative (not in catalog)
CS5513-BS Maximum Ratings & Electrical Characteristics
| Converter Type | Sigma-delta ADC |
| Resolution | 20 bit |
| Number of Inputs | 1 input |
| Number of Channels | 1 channel |
| Conversion Architecture | Charge-balance sigma-delta |
| Internal Oscillator | Yes |
| External Clock Requirement | Not required |
| Package | 8-pin SOIC |
| Mounting Type | Surface mount |
| Lead-Free Status | Lead-free |
| Lifecycle Status | Discontinued |
CS5513-BS Pin Configuration
| Pin 1 | VREF — External reference input |
| Pin 2 | AIN — Analog input |
| Pin 3 | COM — Analog common reference |
| Pin 4 | VSS — Analog ground |
| Pin 5 | DVDD — Digital supply |
| Pin 6 | AVDD — Analog supply |
| Pin 7 | SCLK — Serial clock input |
| Pin 8 | CS — Active-low conversion-start input |
Typical Applications
CS5513-BS is suitable for 6 applications: Industrial Process Monitoring, Precision Sensor Interface, Laboratory Instrumentation, Data Acquisition Module, Embedded Control Panel, Legacy Equipment Repair.
Industrial Process Monitoring
The CS5513-BS fits slow industrial process measurements where a 20-bit sigma-delta converter can monitor one analog sensor without the external clock circuitry associated with more complex converter architectures. Its on-chip oscillator simplifies the timing section, while the 8-pin SOIC package supports compact analog front-end designs. The converter can digitize a conditioned pressure, temperature, level, or position signal when the source remains within the specified analog input range. Designers should select suitable input filtering, observe the digital-filter settling interval, and verify reference accuracy and supply operation against the manufacturer electrical tables before production release.
Recommended
Precision Sensor Interface
The CS5513-BS is appropriate for conditioning and digitizing a single low-bandwidth sensor output when 20-bit resolution and an integrated oscillator are useful. The one-channel architecture keeps the signal path compact, and the on-chip oscillator removes a separate clock source from the bill of materials. Analog front-end design remains critical: the sensor output must remain within the converter’s input limits, and the selected input network should provide adequate acquisition behavior for the internal sampler. Use the manufacturer reference configuration to establish filtering, decoupling, grounding, and digital-interface timing.
Recommended
Laboratory Instrumentation
The CS5513-BS can serve as the measurement ADC in a compact laboratory instrument that monitors a slow or narrow-band analog quantity. Its 20-bit resolution supports fine measurement resolution, while sigma-delta filtering is well matched to signals that can be band-limited before conversion. The integrated oscillator simplifies isolated instrument front ends and reduces clock-distribution complexity. For accurate results, the analog input should be conditioned to the supported range, the reference should be stable, and the measurement software must account for digital-filter latency. Verify the exact sample rate and dynamic performance in the datasheet before setting the instrument’s measurement bandwidth.
Recommended
Data Acquisition Module
The CS5513-BS is suitable for a single-channel data-acquisition module that records slowly changing analog measurements. Its one-input sigma-delta architecture supports cost-conscious instrumentation with a 20-bit numerical result and no external oscillator requirement. The 8-pin SOIC outline permits a compact module footprint, although the analog section still requires careful grounding and reference design. The acquisition software should distinguish a fresh conversion from data still propagating through the digital filter. Input conditioning, anti-alias filtering, and calibration determine the practical accuracy of the complete measurement chain in addition to the converter’s nominal resolution.
Recommended
Embedded Control Panel
The CS5513-BS can digitize one analog control-panel input in an embedded system that needs higher resolution than a basic control ADC but does not require continuous high-rate conversion. The integrated clock source reduces component count, and the compact SOIC package leaves board area for power regulation and communications. A suitable analog buffer may be needed if the source impedance is high or the sensor signal changes rapidly. The controller should wait for valid converted data and respect filter settling time. Firmware can then apply calibration, compensation, and threshold logic to the digitized value for display or supervisory control.
Recommended
Legacy Equipment Repair
The CS5513-BS is directly relevant to repair and continuation of legacy equipment designed around the CS5510/11/12/13 converter family. Matching the existing 8-pin SOIC footprint, 20-bit resolution, and single-input architecture can simplify restoration of an original analog measurement channel. Technicians should still compare the exact suffix marking and pin description before installation, particularly where multiple ordering variants exist. Because the family is discontinued, preserve known-good components for critical repairs and verify input range, reference voltage, supply limits, and interface timing from the original equipment documentation. A production redesign should separately evaluate an active ADC rather than relying on legacy availability.
Recommended
Recommended Products Summary
Engineering reference data for CS5513-BS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CS5513-BSZ |
|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC |
| Brand | Cirrus Logic | Cirrus Logic |
| Resolution | 20 bit | 20 bit |
| Converter Type | Sigma-delta ADC | Sigma-delta ADC |
| Number of Inputs | 1 input | 1 input |
| Number of Channels | 1 channel | 1 channel |
| Internal Oscillator | Yes | Yes |
| Mounting Style | Surface mount | Surface mount |
| Lead-Free Construction | Lead-free | Lead-free |
Key Differentiators
- Closest documented same-package ordering candidate (vs CS5513-BSZ)
- Integrated clock simplifies the converter subsystem (vs CS5513-BSZ)
- Single-channel 20-bit conversion in a compact package (vs CS5513-BSZ)
Design Notes
Route the analog input and reference signals away from digital clock and interface traces. Place the input, reference, and supply bypass components close to their associated pins, following the manufacturer’s recommended application layout. Keep the analog and digital return paths controlled so switching currents do not share sensitive reference and input nodes. Confirm the package orientation and pin numbering against the datasheet before routing the 8-pin SOIC footprint.
Account for the sigma-delta digital-filter response and settling time when scheduling conversions. The converter’s high nominal resolution does not mean that every output word immediately reflects a newly acquired input. Establish an acquisition and processing sequence that discards or identifies data affected by filter latency. Also constrain the source impedance and apply the manufacturer’s input-filter recommendations to obtain repeatable acquisition behavior.
Do not treat the CS5513-BS and CS5513-BSZ as interchangeable solely because their core specifications match. Confirm the ordering suffix, package marking, lead-finish treatment, and lifecycle status for the exact procured part. For new production, the discontinued family status is the central risk: legacy inventory may be available, but there is no assurance of future manufacturing continuity. Review the active-product alternative against pinout, interface, accuracy, bandwidth, and lifecycle requirements.
Compliance Information
A distributor comparison identifies the CS5513-BS as lead-free construction. No explicit RoHS, REACH, AEC-Q100, halogen-free, or conflict-minerals declaration appears in the cited manufacturer or distributor information.
