CS5560-ISZ - 24-Bit 50kSps Delta-Sigma ADC | Cirrus Logic
部品番号: CS5560-ISZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.95 | $995.00 |
| 500 | $8.75 | $4,375.00 |
| 1,000 | $7.85 | $7,850.00 |
CS5560-ISZ 概要
An ADC (Analog-to-Digital Converter) is a semiconductor device that converts continuous analog voltage signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Delta-sigma (Σ-Δ) ADCs use oversampling and noise-shaping techniques to achieve high resolution (16-24 bits) at the cost of lower conversion rates compared to SAR or pipeline architectures. They are categorized as data acquisition ICs within the broader signal chain IC family, sitting between analog sensors and digital processors.
Key features of the CS5560-ISZ include 24 bits no missing codes, signal-to-noise ratio optimized for precision measurement, linearity error of 0.0005%, conversion time of 20 µs that settles in a single conversion, and guaranteed monotonic operation across the full input range. The integrated input buffers simplify front-end signal conditioning by eliminating the need for external op-amp buffers when interfacing with high-impedance sensors or bridge circuits.
The device employs a multi-bit delta-sigma modulator followed by a digital decimation filter, achieving wide dynamic range while maintaining low total harmonic distortion. The single-cycle settling capability makes the CS5560 particularly well-suited for multiplexed channel scanning applications where the ADC must acquire new data rapidly after switching inputs. Internal calibration registers compensate for offset and gain errors at the factory.
Typical applications of the CS5560-ISZ include precision weighing scales and load cell digitizers, industrial process control transducers, medical instrumentation such as patient monitoring equipment, seismic and vibration data acquisition systems, and high-accuracy temperature or strain gauge measurement front-ends. The differential input architecture and integrated reference buffer make it ideal for bridge sensor signal chains where common-mode noise rejection is critical.
When designing with the CS5560-ISZ, ensure the analog and digital grounds are tied at a single point near the ADC, with separate ground planes for analog and digital returns to prevent digital switching noise from coupling into sensitive analog inputs. Use a low-noise voltage reference for VREF+ to maximize SNR, and place decoupling capacitors (typically 100 nF ceramic plus 10 µF tantalum) as close as possible to both VA and VD supply pins.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. The CS5560-ISZ is currently in production with multiple distributors carrying stock, making it a reliable choice for new designs as well as legacy maintenance.
ドロップイン代替品: CS5560-ISZ — 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: CS5560-ISZ （同一形状・フットプリント） — 相違点: Interface, Manufacturer, Package, Part Number, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
CS5560-ISZR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
CS5561-ISZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$10.4 / 個
データシートを見る →CS5560-ISZ 最大定格＆電気的特性
| Manufacturer | Cirrus Logic Inc. |
| Part Number | CS5560-ISZ |
| 分解能 | 24 bit |
| Number of Channels | 1 input |
| ADC Architecture | Sigma-Delta |
| サンプリングレート | 50 kSps (max) |
| Input Configuration | Fully differential |
| Conversion Time | 20 µs (single-cycle settling) |
| Linearity Error | 0.0005% |
| Missing Codes | None (24 bits guaranteed) |
| On-Chip Buffers | Yes (AIN and VREF+ high-impedance buffers) |
| インターフェース | 3/4-wire SPI-compatible serial |
| 電源電圧 | ±2.5 V or 5 V (single supply) |
| Reference Input | External, differential VREF+/VREF- |
| パッケージ | 24-pin SSOP |
| 動作温度 | -40°C to +85°C (industrial) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
CS5560-ISZ ピン構成
| ピン 1 | AIN+ — Positive differential analog input |
| ピン 2 | AIN- — Negative differential analog input |
| ピン 3 | VREF+ — Positive reference input (buffered) |
| ピン 4 | VREF- — Negative reference input |
| ピン 5 | VA — Analog supply voltage |
| ピン 6 | GND — Ground |
| ピン 7 | VA — Analog supply voltage |
| ピン 8 | GND — Ground |
| ピン 9 | NC — Not connected |
| ピン 10 | NC — Not connected |
| ピン 11 | NC — Not connected |
| ピン 12 | NC — Not connected |
| ピン 13 | VD — Digital supply voltage |
| ピン 14 | GND — Ground |
| ピン 15 | CS — Chip select (active low) |
| ピン 16 | SCLK — Serial clock input |
| ピン 17 | SDATA — Serial data output |
| ピン 18 | DRDY — Data ready output |
| ピン 19 | NC — Not connected |
| ピン 20 | NC — Not connected |
| ピン 21 | NC — Not connected |
| ピン 22 | NC — Not connected |
| ピン 23 | NC — Not connected |
| ピン 24 | NC — Not connected |
主な用途
CS5560-ISZ の用途: 6 件s: Precision Weighing Scales, Industrial Process Control, Medical Instrumentation, Seismic and Vibration Data Acquisition, Strain Gauge and Bridge Sensor Signal Chains, Temperature Measurement with RTD/Thermocouple.
Precision Weighing Scales
The CS5560-ISZ is ideal for precision weighing scales and load cell digitizers where 24-bit resolution captures minute weight changes. Its integrated AIN and VREF+ input buffers directly interface with bridge-type load cells without external op-amps, reducing BOM and PCB area. The 50 kSps throughput supports fast settling for commercial scale calibration, while 0.0005% linearity error ensures accuracy across the full weighing range. Single-cycle 20 µs settling enables rapid multiplexer channel switching for multi-load-cell platforms.
おすすめ
Industrial Process Control
In industrial process control systems the CS5560-ISZ digitizes transducer signals from pressure transmitters, flow meters, and level sensors. The fully differential input rejects common-mode noise from motor drives and switching power supplies common on factory floors. Wide dynamic range from the 24-bit sigma-delta architecture detects both small process variations and large setpoint changes without gain switching. The 3/4-wire SPI interface connects directly to PLCs and industrial microcontrollers.
おすすめ
Medical Instrumentation
The CS5560-ISZ serves medical instrumentation front-ends including ECG, EEG, and patient monitoring devices where low-frequency biosignals require high resolution. Its 24-bit no-missing-codes performance captures microvolt-level cardiac signals while the differential input rejects 50/60 Hz power-line interference. Integrated input buffers simplify IEC 60601-1 compliant isolated front-end designs. The wide supply range (±2.5 V or 5 V) accommodates battery-powered portable medical devices.
おすすめ
Seismic and Vibration Data Acquisition
Geophysical exploration systems and structural vibration monitors use the CS5560-ISZ to digitize signals from geophones, accelerometers, and piezo sensors. Its 24-bit dynamic range captures both strong seismic events and weak ambient vibrations in a single acquisition pass without range switching. The 50 kSps sampling rate accommodates vibration analysis up to 20 kHz bandwidth per Nyquist criterion. Differential inputs reject ground-loop noise in long cable runs from remote sensors.
おすすめ
Strain Gauge and Bridge Sensor Signal Chains
The CS5560-ISZ's differential input and integrated reference buffer are purpose-built for Wheatstone bridge sensors including strain gauges, pressure transducers, and force sensors. The VREF+ high-impedance buffer accepts low-noise external references essential for ratiometric measurements, compensating for sensor excitation drift. 0.0005% linearity error maintains gauge accuracy across the full deflection range. SPI output simplifies connection to industrial IoT edge nodes.
おすすめ
Temperature Measurement with RTD/Thermocouple
Precision temperature measurement systems using PT100/PT1000 RTDs or K/J-type thermocouples benefit from the CS5560-ISZ's 24-bit resolution to resolve sub-0.01°C changes. The differential input rejects thermocouple loop common-mode voltages when used with isolated front-ends. Integrated input buffers accept high-impedance thermocouple signals directly without cold-junction compensation amplifier stages. The 0.0005% linearity error maintains NIST-traceable calibration accuracy in laboratory and industrial process environments.
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: CS5560-ISZ — 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 | CS5560-ISZR | CS5561-ISZ | ADS1256IDBR |
|---|---|---|---|---|
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Texas Instruments |
| Package | 24-SSOP | 24-SSOP - same | 24-SSOP - same | 28-SSOP - DIFFERENT |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit |
| Sampling Rate | 50 kSps | 50 kSps | 40 kSps | 30 kSps |
| Number of Channels | 1 differential | 1 differential | 1 differential | 8 differential/16 single-ended |
| Architecture | Sigma-Delta | Sigma-Delta | Sigma-Delta | Sigma-Delta |
| Input Buffers | Integrated (AIN, VREF+) | Integrated | Integrated | External required |
| Interface | 3/4-wire SPI | 3/4-wire SPI | 3/4-wire SPI | SPI |
主な差別化要因
- Integrated input buffers for both AIN and VREF+ （vs ADS1256IDBR)
- Higher sampling rate (50 kSps vs 30 kSps) （vs ADS1256IDBR)
- Single-cycle 20µs settling （vs CS5561-ISZ)
設計ノート
Use separate analog and digital ground planes tied at a single point near the CS5560-ISZ GND pin. Route AIN+/AIN- as a differential pair with matched impedance, keeping traces short and away from switching nodes (DC-DC converters, clock signals). Place 100 nF ceramic + 10 µF tantalum decoupling capacitors within 5 mm of VA and VD pins. Avoid running digital signals (SCLK, SDATA) directly above analog input traces to prevent capacitive coupling.
Do NOT connect VREF- to GND when using single-ended references; the CS5560 requires true differential reference for ratiometric measurements. The integrated VREF+ buffer has limited drive capability — use an external low-noise reference like ADR5044 or ADR01 rather than the analog supply. NC pins (9-12, 19-24) MUST remain floating per datasheet — do NOT connect them to GND or supply as this can cause internal bias errors and degrade linearity.
For optimum SNR with the CS5560-ISZ, place a simple RC anti-aliasing filter (typically 100 Ω + 1 nF, fc ≈ 1.6 MHz) right at the AIN+/AIN- pins. The internal buffers handle the capacitive load well. When using long sensor cables (>100 mm), add ESD protection diodes (such as PESD5V0L1BA) at the connector to prevent transient damage during hot-plug events.
コンプライアンス情報
RoHS compliant per Cirrus Logic product page. Industrial temperature range -40°C to +85°C. Not AEC-Q100 qualified for automotive applications.
