CS5534-BSZR - 24-Bit Delta-Sigma ADC with PGIA | Cirrus Logic Inc.
部品番号: CS5534-BSZR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $10.82 | $10.82 |
| 10 | $10.15 | $101.50 |
| 25 | $9.6 | $240.00 |
| 100 | $9.05 | $905.00 |
| 1,000 | $8.5 | $8,500.00 |
CS5534-BSZR 概要
A delta-sigma ADC is a type of analog-to-digital converter that uses oversampling and charge-balance (sigma-delta) modulation to achieve very high resolution, typically 16 to 24 bits, at moderate conversion speeds. Within the data-acquisition hierarchy, it sits above general-purpose SAR ADCs in resolution and below high-speed pipeline converters in throughput, making the delta-sigma architecture the dominant choice for precision sensor measurement front ends in weigh scales, process control, scientific instrumentation, and medical equipment.
Key features of the CS5534-BSZR include 24-bit resolution achieved through charge-balance techniques, four differential input channels for multi-sensor systems, an integrated PGIA that eliminates a discrete instrumentation amplifier stage, and ultra-low-noise performance optimized for measuring low-level unipolar or bipolar signals. The on-chip PGIA supports gain selection so microvolt-level bridge and thermocouple signals can be amplified before conversion, directly improving effective system resolution.
Technically, the device belongs to the CS5531/32/33/34 family, which pairs a low-noise PGIA front end with a fourth-order (per family architecture) delta-sigma modulator and on-chip digital filtering. The serial interface allows configuration of gain, line-frequency rejection, and conversion rates, while calibration options support system-level offset and gain correction without external trimming components.
Typical applications include weigh-scale load-cell front ends, where microvolt-level bridge outputs demand ultra-low input noise; process-control transmitters measuring 4-20 mA loop sensor signals; and medical or scientific instruments digitizing low-level bipolar signals with high linearity.
A key design consideration: the analog front end requires careful layout - separate clean analog supplies, a stable voltage reference, and guarding around input traces - because at 24-bit resolution, board-level noise can dominate the ADC's own performance.
This page synthesizes distributor pricing, drop-in family alternatives, datasheet guidance, and practical design notes not consolidated in the manufacturer datasheet, with pricing as of 2026-09-13.
ドロップイン代替品: CS5534-BSZR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: CS5534-BSZR （同一形状・フットプリント） — 相違点: Number of Input Channels, Package, Calibration, Interface, Architecture.
クイック比較ツール — 並列比較する代替部品を選択:
CS5534-ASZR
✅ ドロップイン✓ 在庫あり
$3.55 / 個
データシートを見る →CS5534-ASZ
✅ ドロップイン✓ 在庫あり
$7.6 / 個
データシートを見る →CS5534-BSZ
✅ ドロップイン✓ 在庫あり
価格はお問い合わせください
データシートを見る →CS5532-BSZR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$5.8 / 個
データシートを見る →CS5534-BSZR 最大定格＆電気的特性
| 分解能 | 24 bit |
| Number of Input Channels | 4 (differential) |
| Architecture | Sigma-Delta (charge-balance) with PGIA |
| Maximum Output Data Rate | 3.84 kSPS |
| インターフェースタイプ | Serial (SPI-compatible) |
| パッケージ | 24-SSOP (5.30 mm width) |
| 実装タイプ | Surface Mount |
| Input Type | Differential, unipolar or bipolar |
| Noise Performance | Ultra-low noise (per manufacturer datasheet) |
| Applications Focus | Weigh scale, process control, scientific, medical |
| Packaging | Tape & Reel (R suffix) |
CS5534-BSZR 24-ssop (5.30 mm width) ピン配置ガイド
CS5534-BSZR (24-ssop (5.30 mm width) パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: CS5534-BSZR.
詳細は データシート をご参照ください。
主な用途
CS5534-BSZR の用途: 6 件s: Weigh Scale Load-Cell Front End, Industrial Process Control Transmitters, Medical and Diagnostic Instrumentation, Scientific and Laboratory Instrumentation, Temperature Measurement (Thermocouple / RTD), Battery-Powered Portable Measurement Devices.
Weigh Scale Load-Cell Front End
The CS5534-BSZR fits weigh-scale applications because load-cell bridges output only ~2 mV/V full-scale, requiring microvolt-level noise performance; the integrated ultra-low-noise PGIA amplifies these signals before 24-bit conversion without a discrete instrumentation amplifier stage. In a typical topology, the load-cell differential outputs connect to one of the four input channels, excitation is derived from a precision reference, and the PGIA gain is selected in firmware to match bridge sensitivity. The 3.84 kSPS maximum output rate comfortably supports 50-100 Hz filtering for checkweighers and retail scales, while on-chip calibration removes offset and gain drift over temperature. Multi-channel capability allows one CS5534 to service several load points, reducing BOM cost versus single-channel ADCs.
おすすめ
Industrial Process Control Transmitters
In 4-20 mA loop-powered transmitters, the CS5534-BSZR digitizes low-level sensor signals - thermocouples, RTDs, and pressure bridges - with high resolution despite the harsh electrical environment of industrial plants. The differential inputs reject common-mode noise picked up along cable runs, and the delta-sigma architecture's line-frequency rejection attenuates 50/60 Hz interference without aggressive external filtering. Four channels let one ADC multiplex multiple process variables, simplifying transmitter designs. Because the PGIA is integrated, gain changes for different sensor types are handled in firmware rather than hardware, enabling one PCB platform across sensor variants. The 3.84 kSPS rate far exceeds the ~10 Hz update needs of process variables, allowing heavy digital averaging for noise reduction.
おすすめ
Medical and Diagnostic Instrumentation
Medical measurement equipment - blood analyzers, patient scales, and diagnostic sensors - demands the CS5534-BSZR's combination of ultra-low noise, high linearity, and bipolar signal capability. Biologically derived and chemical-sensor signals are frequently microvolt-level and bipolar, exactly the input class the CS5532/34 family was optimized for per the Cirrus Logic product page. The charge-balance delta-sigma modulator delivers 24-bit resolution so that sub-LSB clinical discrimination is achievable after averaging, while the integrated PGIA preserves signal-to-noise ratio at low gain settings. Four differential channels support multi-parameter instruments on a single converter, and the serial interface connects cleanly to isolated digital interfaces required for patient-connected equipment safety compliance.
おすすめ
Scientific and Laboratory Instrumentation
Scientific instruments such as spectrometers, chromatography detectors, and precision electrometers use the CS5534-BSZR where 24-bit dynamic range resolves signals spanning several decades of amplitude. The ultra-low-noise PGIA front end preserves small detector signals, while bipolar input capability handles negative-going sensor outputs common in photodiode and ionization-chamber circuits. At 3.84 kSPS the converter supports the 1-100 Hz bandwidths typical of analytical instruments, and excess rate is traded for resolution via averaging in the host firmware. The four multiplexed differential channels allow one converter to sequentially digitize multiple detector stages, synchronizing measurements in multi-channel experiments. The serial interface eases integration with microcontroller-based instrument control boards.
おすすめ
Temperature Measurement (Thermocouple / RTD)
Thermocouple signals of ~40 uV/C demand the CS5534-BSZR's microvolt-level noise floor: with PGIA gain applied, the 24-bit converter resolves fractions of a degree directly, and bipolar input handling accommodates thermocouples driven below ambient. For RTDs, ratiometric measurement against the excitation current reference cancels reference drift, and the differential inputs reject lead-wire common-mode voltage in 3- and 4-wire configurations. The 50/60 Hz line rejection of the delta-sigma modulator is valuable in electrically noisy plants. Four channels let one device monitor multiple measurement points, for example hot-junction reference plus several process temperatures. The 3.84 kSPS rate is far above thermal time constants, allowing aggressive digital filtering for stability.
おすすめ
Battery-Powered Portable Measurement Devices
Portable instruments - handheld scales, field meters, and battery-powered data loggers - benefit from the CS5534-BSZR's delta-sigma efficiency and single-converter multi-channel architecture, which reduces total component count and board area versus discrete amplifier-plus-ADC chains. The low-level signal capability permits direct connection of bridge and thermocouple sensors without high-power amplification stages, conserving battery energy. The serial interface operates from standard microcontroller SPI peripherals, and the 3.84 kSPS rate permits duty-cycled conversions: the ADC can be clocked, sampled, and powered down between measurements, dramatically extending battery life in logging applications where readings are needed only a few times per second or less.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: CS5534-BSZR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | CS5534-ASZR | CS5534-ASZ | CS5534-BSZ | CS5532-BSZR |
|---|---|---|---|---|---|
| Package | 24-SSOP (5.30 mm width) | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same |
| Brand | Cirrus Logic Inc. | Cirrus Logic Inc. | Cirrus Logic Inc. | Cirrus Logic Inc. | Cirrus Logic Inc. |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Input Channels | 4 differential | 4 differential | 4 differential | 4 differential | 2 differential |
| Max Output Rate | 3.84 kSPS | 3.84 kSPS | 3.84 kSPS | 3.84 kSPS | 3.84 kSPS |
| Accuracy Grade | B grade (tightest specs) | A grade (relaxed specs) | A grade (relaxed specs) | B grade (identical) | B grade |
| Integrated PGIA | Yes | Yes | Yes | Yes | Yes |
| Packaging Format | Tape & Reel (R) | Tape & Reel (R) | Tube/Tray | Tube/Tray | Tape & Reel (R) |
| Interface | Serial (SPI-compatible) | Serial (SPI-compatible) | Serial (SPI-compatible) | Serial (SPI-compatible) | Serial (SPI-compatible) |
主な差別化要因
- B-grade accuracy at A-grade availability （vs CS5534-ASZR)
- Four differential channels vs two （vs CS5532-BSZR)
- Integrated ultra-low-noise PGIA （vs Discrete in-amp + generic 24-bit ADC solutions)
- Honest trade-off: no cross-brand drop-in exists （vs ADS124S08 / AD7124-8)
設計ノート
At 24-bit resolution, board-level noise dominates system performance. Place the CS5534-BSZR close to the sensor/connector, route differential input pairs as matched traces with a guard ring, and keep digital lines (SCLK, SDI, SDO) away from analog inputs. Use a solid, low-impedance ground plane and star-connect the analog return. Decouple all supply pins with 100 nF ceramics placed within 2 mm of the pins, plus bulk 10 uF per rail. Follow the layout guidance in the Cirrus Logic CS5534 family datasheet application section.
Use separate, clean analog supply rails and a low-noise voltage reference; reference noise appears directly in the output code multiplied by the PGIA gain. Ratiometric configurations - deriving both bridge excitation and reference from the same source - cancel reference drift and are the standard approach in weigh-scale designs with this family. Sequence digital and analog supplies per the datasheet recommended operating conditions, and avoid sharing the reference ground return with high-current digital loads.
Estimated common mistakes: (1) driving the inputs outside the PGIA common-mode input range specified in the datasheet, which clips rather than saturates gracefully; (2) skipping offset/gain calibration at power-up, forfeiting much of the B-grade accuracy; (3) assuming a modern 24-bit ADC (e.g., ADS124S08) can drop onto the CS5534 footprint - per PartGenie there is no cross-brand pin-to-pin drop-in for this part, so plan a redesign if second-sourcing is required; (4) using A-grade (CS5534-ASZ) parts in designs budgeted around B-grade INL limits.
コンプライアンス情報
Compliance status not stated in the verified web data; the 'Z' suffix in Cirrus Logic ordering codes conventionally denotes lead-free/RoHS-compliant packaging, but official confirmation must come from the manufacturer product page or datasheet.
