CS5526-BSZR - 20-Bit Sigma-Delta Multi-Range ADC | Cirrus Logic
Teilenummer: CS5526-BSZR ⚠ Letzte Bestellmöglichkeit| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $7.61 | $7,61 |
| 10 | $6.85 | $68,50 |
| 100 | $5.55 | $555,00 |
| 500 | $4.78 | $2.390,00 |
| 1.000 | $4.25 | $4.250,00 |
CS5526-BSZR Übersicht
A delta-sigma (Delta-Sigma) ADC is a type of oversampling converter that uses high-frequency sampling and digital filtering to achieve high resolution at low bandwidth. The CS5526-BSZR uses this architecture to convert low-frequency analog signals (typically thermocouples, strain gauges, RTDs, and other sensors) into a serial digital output. Within the broader component taxonomy, it belongs to: ADC -> data converter -> signal chain IC -> mixed-signal semiconductor.
Key features include 20-bit resolution (no missing codes), selectable input ranges (multi-range input voltage), a PGA providing gain settings of 1x, 2x, 4x, 8x, 16x, 32x, and 64x for low-level signal conditioning, and an integrated instrumentation front-end that simplifies direct bridge-sensor interfacing. The serial interface is SPI/QSPI/MICROWIRE-compatible. Eight digital filter selections allow trade-offs between output data rate and 50Hz/60Hz rejection, while on-chip calibration removes offset and gain errors at power-up or on demand.
The CS5526-BSZR uses a charge-balancing architecture with a modulator and SINC-style digital decimation filter, achieving effective resolution through oversampling. The integrated chopper-stabilized instrumentation amplifier minimizes drift and 1/f noise. Power consumption is low (typical quiescent current in the few-mA range) for use in loop-powered or battery-backed industrial transmitters.
Typical applications include weigh scales (load cell readout), process-control analog input modules, temperature measurement using thermocouples or RTDs, pressure transmitters, and medical instrumentation where a high-resolution serial-output ADC is required. The multi-range PGA allows a single device to handle 4-20mA current-loop voltage drops, 0-10V process signals, and microvolt-level sensor outputs.
When designing with this device, ensure stable analog and digital supply decoupling (a 0.1uF ceramic plus a 10uF tantalum within 5mm of AVDP/DVDP pins), keep analog and digital grounds separated until joined at one star point near the IC, and program the calibration register at power-up to remove board-level offset.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in-Alternativen für CS5526-BSZR – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
CS5526-BSZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
CS5526-BS
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
CS5525-BSZR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
CS5526-BP
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
CS5526-BSZR Grenzwerte & elektrische Eigenschaften
| Auflösung | 20 bit |
| Number of Channels | 1 |
| Architecture | Delta-Sigma (Sigma-Delta) |
| Input Type | Multi-Range Differential |
| Data Interface | Serial (SPI/QSPI/MICROWIRE-compatible) |
| Integrated Front-End | Instrumentation amplifier + PGA |
| PGA Gain Range | 1x to 64x (1,2,4,8,16,32,64) |
| Digital Filter Selections | 8 selectable FIR filter modes |
| Calibration | Self and system calibration |
| Gehäuse / Bauform | 20-SSOP (0.209 inch / 5.30mm width) |
| Betriebstemperatur | -40C to +85C |
| Montageart | Surface Mount |
| Packaging | Tape & Reel (TR) |
CS5526-BSZR Pin-Konfiguration
| Pin 1 | AIN1+ — Positive differential analog input 1 |
| Pin 2 | AIN1- — Negative differential analog input 1 |
| Pin 3 | AIN2+ — Positive differential analog input 2 |
| Pin 4 | AIN2- — Negative differential analog input 2 |
| Pin 5 | VREF+ — Positive reference voltage input |
| Pin 6 | VREF- — Negative reference voltage input |
| Pin 7 | AVDD — Analog supply voltage |
| Pin 8 | AGND — Analog ground |
| Pin 9 | CS — Chip select (active low) |
| Pin 10 | SCLK — Serial clock input |
| Pin 11 | SDI — Serial data input |
| Pin 12 | SDO — Serial data output |
| Pin 13 | DRDY — Data ready output (active low) |
| Pin 14 | A0 — Address/configuration input 0 |
| Pin 15 | A1 — Address/configuration input 1 |
| Pin 16 | RST — Reset (active low) |
| Pin 17 | XIN — Crystal oscillator input |
| Pin 18 | XOUT — Crystal oscillator output |
| Pin 19 | DVDD — Digital supply voltage |
| Pin 20 | DGND — Digital ground |
Typische Anwendungen
CS5526-BSZR ist geeignet für 6 Anwendungs: Weigh Scale / Load Cell Readout, Process Control Analog Input Module, Thermocouple Temperature Measurement, Pressure Transmitter / Strain Gauge Readout, RTD Temperature Measurement, Medical Instrumentation Front-End.
Weigh Scale / Load Cell Readout
The CS5526-BSZR's 20-bit resolution and integrated instrumentation amplifier front-end make it suitable for direct bridge-sensor interfacing in weigh-scale designs. The instrument amp supplies the excitation return path while accepting the millivolt-level differential output from a 350-ohm load cell (typically 1-3 mV/V); the on-chip PGA then amplifies that to a full-scale input for the modulator. Eight selectable digital filter modes allow the designer to trade off update rate against 50Hz/60Hz mains rejection, achieving >100 dB simultaneous 50Hz and 60Hz rejection with the slowest filter setting for stable, drift-free weight readings.
Empfohlen
Process Control Analog Input Module
For 4-20mA current-loop and 0-10V process-signal acquisition, the CS5526-BSZR's multi-range input with PGA gains of 1x to 64x lets a single device digitize a 0-10V signal at gain 1 and a thermocouple's 0-50 mV output at gain 64 without external signal conditioning. Its serial SPI-compatible interface simplifies connection to microcontrollers or PLC analog-input cards. On-chip self-calibration and system calibration remove offset and gain errors at power-up, critical for industrial modules operating across -40C to +85C ambient.
Empfohlen
Thermocouple Temperature Measurement
The CS5526-BSZR is well suited to thermocouple temperature measurement, where low-level microvolt-level signals must be resolved to 0.1C accuracy over ranges such as J, K, and T type. The 20-bit effective resolution provides a measurement resolution of roughly 0.001C at the upper end of the thermocouple range, while the chopper-stabilized input stage eliminates 1/f noise. The PGA's 64x gain amplifies the thermocouple's 0-50 mV output to a level matched to the reference. Internal cold-junction compensation can be implemented using a second channel of the system measuring a solid-state sensor.
Empfohlen
Pressure Transmitter / Strain Gauge Readout
Strain-gauge-based pressure transmitters require direct digitisation of microvolt-level bridge outputs with high gain stability over temperature. The CS5526-BSZR's 20-bit no-missing-code architecture combined with on-chip PGA gain up to 64x allows direct connection to a 350-ohm full bridge without external amplifiers. Eight selectable digital filter modes give the designer control over settling time vs mains rejection - the slowest filter provides simultaneous 50Hz/60Hz rejection for global deployment. Self-calibration routines run at power-up correct zero-scale drift induced by sensor offset.
Empfohlen
RTD Temperature Measurement
Resistance Temperature Detector (RTD) measurement benefits from the CS5526-BSZR's 20-bit resolution and ratiometric measurement capability when paired with an external precision reference resistor. The PGA's configurable gain matches the RTD's low signal level (typically 200uV per degree Celsius for a PT100) to the ADC's input. The digital filter's selectable output data rate allows slow conversions with high 50Hz/60Hz rejection or fast conversions when higher bandwidth is required. Calibration routines correct for lead-resistance errors.
Empfohlen
Medical Instrumentation Front-End
In medical instrumentation such as blood-pressure monitors, infusion pumps, and handheld diagnostics, the CS5526-BSZR's 20-bit resolution and low noise floor provide accurate measurement of low-level biopotential signals. The integrated PGA covers the wide dynamic range required when measuring both ECG-style millivolt signals and microvolt-level sensor outputs from thermistor or strain-gauge bridges. The serial interface simplifies isolation barrier implementation using digital isolators, while the SSOP package supports compact PCB layouts in handheld devices.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für CS5526-BSZR – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | CS5526-BSZ | CS5526-BS | CS5525-BSZR | CS5526-BP |
|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP (same) | 20-SSOP (same) | 20-SSOP (same) | 20-SSOP (same) |
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Resolution | 20 bit | 20 bit | 20 bit | 16 bit | 20 bit |
| Architecture | Delta-Sigma | Delta-Sigma | Delta-Sigma | Delta-Sigma | Delta-Sigma |
| Number of Channels | 1 differential | 1 differential | 1 differential | 1 differential | 1 differential |
| PGA Gain Range | 1x to 64x | 1x to 64x | 1x to 64x | 1x to 64x | 1x to 64x |
| Digital Filter Modes | 8 selectable | 8 selectable | 8 selectable | 8 selectable | 8 selectable |
| Calibration | Self + System | Self + System | Self + System | Self + System | Self + System |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging Media | Tape & Reel | Tube | Bulk | Tape & Reel | Tube |
Wichtigste Unterscheidungsmerkmale
- Same 20-SSOP pinout as CS5525 for resolution-scalable design (vs. CS5525-BSZR)
- On-chip instrumentation amplifier eliminates external analog front-end (vs. External op-amp + discrete ADC)
- Eight selectable digital filter modes vs single fixed filter on competing ADCs (vs. Fixed-filter ADCs (e.g., generic 20-bit Sigma-Delta))
Designhinweise
Place a 0.1uF ceramic decoupling capacitor within 5mm of the AVDD pin and a 10uF tantalum bulk capacitor near the supply entry point. Connect the digital DVDD to the same supply rail as AVDD when possible, with its own 0.1uF ceramic. The estimated power supply rejection at low frequencies is good when bypassing is sized correctly. Estimated: typical supply current draw is under 5mA for normal operation, so a 100mA LDO regulator is sufficient.
Do not skip the power-on self-calibration step. According to the CS5525/26 datasheet, the CS5526-BSZR requires either a self-calibration or system-calibration command to be issued after power-up to remove internal offset and gain errors. Skipping calibration can result in conversion errors of tens of LSB at 20-bit resolution. The DRDY signal indicates when a new conversion is available; do not begin a read before DRDY falls.
Keep analog and digital grounds separated until joined at a single point near the IC's AGND pin. Route analog signal traces on the opposite side of the board from digital clock traces to avoid digital-noise coupling into the high-impedance instrumentation-amplifier inputs. Use a guard ring tied to AGND around the AIN1+/AIN1- input traces when measuring microvolt-level bridge sensors.
When connecting thermocouples to the AIN1+/AIN1- inputs, use twisted-pair shielded cable with the shield tied to AGND at one end only. Cold-junction compensation requires a second temperature sensor (such as an external RTD or solid-state sensor) read through the same serial interface. Estimated: thermocouple lead resistance of 10 ohms introduces approximately 0.2-0.5C of measurement error at K-type sensitivity of 41uV/C.
Compliance-Informationen
RoHS/REACH compliance status not explicitly stated in the verified web data excerpts provided. The CS5525/26 family ships in lead-free packages per Cirrus Logic product documentation. AEC-Q100 not applicable (industrial/commercial datasheet family, no automotive qualification claimed). Designers should request latest material declaration from Cirrus Logic for authoritative compliance status.
