CS5371-BS 24-Bit 512k Serial Modulator | Cirrus Logic
N.º de pieza: CS5371-BS ✗ Fin de vidaCS5371-BS Descripción general
A delta-sigma modulator is a specialized signal-processing IC that converts an analog input into a high-speed, low-resolution bit stream whose average value represents the sampled analog signal. Within the ADC/DAC hierarchy, this type of modulator sits between a general-purpose data converter and a digital filter or decimator. It is especially useful when a downstream processor can reconstruct or process the filtered bit stream, allowing converter performance to be distributed across analog input conditioning and digital reconstruction.
The CS5371-BS combines three principal characteristics: 24-bit modulator resolution, a 512 kHz serial interface, and low-power operation. Cirrus Logic also identifies a power-down mode as a device feature. This combination supports designs in which the modulator is enabled only when conversion is required. The 24-SSOP package provides a conventional surface-mount form factor, while the available distributor data confirms its 24-pin package designation.
According to the manufacturer data referenced by the distributor sources, CS5371 and CS5372 inputs must be bandwidth-limited to preserve loop stability and prevent aliased high-frequency signals. The modulators use a fourth-order architecture and are conditionally stable, making input filtering a critical part of the signal chain. A poorly selected antialias filter can therefore produce stability problems or allow high-frequency content to fold into the useful measurement band.
Typical uses include industrial measurement systems, communication equipment, instrumentation, and digital signal-processing front ends. In each case, the serial interface can feed a digital filter or decimator, while the low-power characteristic benefits portable or intermittently operated equipment. Applications requiring a complete high-resolution ADC should also evaluate the external filter, clocking, reconstruction circuitry, and downstream processor rather than treating the modulator as a standalone converter.
Designers should place the input antialias network close to the modulator and verify stability across the full input range, clock frequency, and output-load conditions. Because the device is conditionally stable, operating conditions outside the recommended input bandwidth deserve particular attention. Exact supply voltage, reference requirements, clock range, current consumption, and performance limits require confirmation from the manufacturer datasheet before layout or production release.
This product page consolidates verified distributor specifications, package information, pricing signals, same-family alternatives, and practical stability guidance. It also distinguishes documented facts from parameters that still require direct manufacturer confirmation, helping engineers assess fit without filling specification gaps with assumptions.
Alternativas directas para CS5371-BS — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
CS5372
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
CS5376
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
CS5376A
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
CS5381
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
CS5394
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
CS5371-BS Valores máximos y características eléctricas
| Product Type | Low-power, high-performance delta-sigma modulator |
| Function Category | ADCs/DACs - Special Purpose |
| Modulator Resolution | 24 bit |
| Serial Interface Rate | 512 kHz |
| Encapsulado | 24-SSOP |
| Recuento de pines | 24 pins |
| Tipo de montaje | Surface mount |
| Power-Down Mode | Supported |
| Modulator Order | 4th order |
| Loop Stability | Conditionally stable |
| Input Bandwidth Requirement | Input bandwidth must be limited to prevent aliased high-frequency signals |
Guía de configuración de pines de CS5371-BS 24-ssop
Configuración de pines para CS5371-BS (encapsulado 24-ssop). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para CS5371-BS.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
CS5371-BS es adecuado para 6 aplicacións: Industrial Sensor Measurement, Communications Signal Conditioning, Precision Instrumentation, Low-Power Acquisition System, Audio and Vibration Analysis, Digital Signal Processing Front End.
Industrial Sensor Measurement
The CS5371-BS fits industrial sensor measurement when an analog sensor signal is converted into a serial digital stream for subsequent filtering and analysis. Its 24-bit resolution provides fine quantization granularity, while the 512 kHz serial interface supports high-rate transfer to a digital filter or controller. The critical implementation detail is the input antialias network: because the fourth-order modulator is conditionally stable, the input must be bandwidth-limited to prevent aliased high-frequency signals from degrading conversion performance. Designers should also confirm supply voltage, clock limits, and input range from the manufacturer datasheet before defining the sensor interface.
Recomendado
Communications Signal Conditioning
CS5371-BS is suitable for communications signal-conditioning front ends that separate a desired analog band from out-of-band noise before digital processing. The 512 kHz serial output provides a high-speed bit stream, and the 24-bit modulator representation retains fine amplitude detail. Since the device is a fourth-order, conditionally stable modulator, the analog input must be limited before the modulator so that strong interferers do not cause instability or alias into the passband. Clock source quality, serial timing, and the receiving filter or decimator must be evaluated together to preserve signal integrity.
Recomendado
Precision Instrumentation
The CS5371-BS can form the conversion front end of precision instrumentation that captures low-level analog measurements and transfers them to a digital subsystem. Its 24-bit resolution is attractive for instrumentation, and the serial interface reduces the number of parallel data lines required around the modulator. However, the converter must be followed by an appropriate digital filter and must receive a bandwidth-limited analog input to prevent aliased high-frequency content. Layout should minimize signal-loop area, while the final error budget should account for the antialias filter, clock, reference path, and downstream processing rather than relying on resolution alone.
Recomendado
Low-Power Acquisition System
CS5371-BS is appropriate for a low-power acquisition system that does not need to convert continuously. Its advertised low-power operation and power-down mode can reduce activity when measurements are not being collected, while the 24-bit resolution preserves fine signal detail during active conversion. The 512 kHz serial interface allows the modulator output to feed a decimating processor without a wide parallel bus. Power-management sequencing must prevent the modulator from being clocked or sampled before its supply and clock conditions are valid, and the analog input filter should remain designed for worst-case interference during startup.
Recomendado
Audio and Vibration Analysis
CS5371-BS can serve as the modulator stage in audio or vibration-analysis systems where a high-rate serial representation is filtered and decimated downstream. The 24-bit resolution supports fine amplitude discrimination, while the 512 kHz serial interface accommodates rapid conversion data. The input network must be carefully selected because broadband vibration or audio energy can contain high-amplitude out-of-band components that challenge the conditionally stable fourth-order loop. A low-noise preamplifier, controlled antialias filter, and suitable clocking arrangement are more important than nominal resolution alone for preserving useful dynamic range.
Recomendado
Digital Signal Processing Front End
CS5371-BS works as a dedicated modulator stage in a digital signal-processing front end where an FPGA, DSP, or microcontroller performs digital filtering, decimation, and spectral analysis. The 512 kHz serial stream provides a suitable interface for a modern processor, and the 24-bit representation preserves source information before digital reconstruction. The host processor should support the exact serial format and required clock rate, while the analog path must include a bandwidth-limiting filter. This division of labor enables flexible digital calibration, but it also requires validation of total noise, latency, alias rejection, and modulator stability across operating conditions.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para CS5371-BS — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | CS5372 | CS5376 | CS5376A | CS5381 | CS5394 |
|---|---|---|---|---|---|---|
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Package | 24-SSOP | 24-SSOP - provisional same-package match | 24-SSOP - provisional same-package match | 24-SSOP - provisional same-package match | 24-SSOP - provisional same-package match | 24-SSOP - provisional same-package match |
| Product Type | Low-power, high-performance delta-sigma modulator | Modulator | Modulator | Modulator | Modulator | Modulator |
Diferenciadores clave
- Documented high-rate serial converter interface (frente a CS5372)
- Verified 24-bit resolution (frente a CS5394)
- Low-power operation with power-down capability (frente a CS5381)
- Same manufacturer family for reduced support risk (frente a CS5376A)
Notas de diseño
The manufacturer data states that CS5371 and CS5372 inputs must be bandwidth-limited to preserve loop stability and prevent aliased high-frequency signals. Design the analog antialias filter before laying out the PCB, including its stop-band attenuation, pass-band phase, and interaction with the modulator input capacitance. Re-evaluate the network when the sensor, cable, clock frequency, or operating temperature changes; a filter that is adequate at room temperature may not provide sufficient rejection at the extremes.
Keep the analog input path short and place its filtering components close to the device to minimize parasitic pickup and feedback into the conditionally stable modulator loop. Keep the 512 kHz serial clock and output routing away from the high-impedance analog input, and provide a solid ground reference for the modulator and downstream digital circuitry. Because the supplied records do not expose the verified pin map, finalize placement only after checking the manufacturer drawing and exposed-pad requirements in the datasheet.
Do not assume that a nominal 24-bit modulator creates a complete 24-bit ADC measurement path. A usable conversion also depends on input bandwidth, antialias filtering, clock accuracy, output decoding, digital decimation, and system noise. In particular, high-amplitude out-of-band signals can destabilize the fourth-order loop. Before production, verify power sequencing, valid clocking, digital output format, and the reconstructed frequency response in the intended system configuration.
Use the power-down function as part of a deliberate power-management strategy rather than an automatic substitute for correct sequencing. Confirm from the manufacturer datasheet when the serial outputs become valid, how the modulator behaves during power-down, and whether the clock may continue while the analog supply is disabled. The verified records do not provide supply limits or current consumption, so rail tolerances, decoupling, and power-source capability must be checked against the manufacturer data before layout release.
Información de cumplimiento
The supplied web data does not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. These fields remain unknown rather than being inferred from the manufacturer or distributor.
