AD7190WBRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
N.º da peça: AD7190WBRUZ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $60 | $60,00 |
| 10 | $43.3333 | $433,33 |
| 100 | $38.3333 | $3.833,33 |
| 500 | $36.6667 | $18.333,35 |
| 1.000 | $35 | $35.000,00 |
AD7190WBRUZ Visão geral
A sigma-delta ADC is a converter that uses oversampling and noise shaping to achieve very high resolution. Unlike successive-approximation ADCs, sigma-delta converters sample the input many times and apply digital filtering, which moves quantization noise out of the signal band. This makes the AD7190WBRUZ well suited for low-frequency, high-accuracy measurements such as load cells, pressure sensors, temperature transducers, and precision process control loops. As an ADC, the device sits between the analog sensor and the digital processing core in a measurement system, converting tiny analog signals into serial digital words.
Key features include 24-bit no-missing-codes performance, a PGA with gain levels suitable for millivolt-level sensor outputs, and a low-noise sigma-delta architecture that minimizes error in precision bridges. The device also offers an internal clock option, simple SPI interface, and a serial read rate that supports real-time weight and pressure monitoring. The 24-lead TSSOP package is compact and facilitates dense PCB layouts.
Technically, the AD7190WBRUZ integrates a chopper-stabilized amplifier and a digital filter that can be configured for different output rates and settling times. It operates from an analog supply and supports external references, enabling ratiometric measurements. The ADC continuously converts at rates up to 4.8 kSPS, making it a practical choice for weigh scale controllers and industrial transmitters. Its digital interface is compatible with microcontrollers and DSPs through standard SPI commands.
Typical applications include industrial process control, high-precision weigh scales, medical monitoring equipment, and RTD/thermocouple temperature measurement. The device is also used in portable instrumentation where low power and high accuracy are required. For multi-channel systems, the input multiplexer allows configuration of two differential channels or four single-ended/pseudo-differential inputs.
Designers should pay attention to the analog reference and power supplies: use low-noise references and decouple AVDD with high-quality capacitors. The PGAs sensitivity to input offsets must be calibrated during system initialization. The AD7190WBRUZ supports a wide operating temperature range, making it suitable for harsh industrial environments. When pairing with a microcontroller, connect the SPI lines (SCLK, DIN, DOUT/RDY, CS) to a fast host port to take full advantage of the 4.8 kSPS throughput.
Alternativas drop-in para AD7190WBRUZ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com AD7190WBRUZ (mesmo formato e footprint) — diferindo em Data Interface, Input Type, Sampling Rate.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
AD7190BRUZ
✓ Em estoque
$7.6364 / unidade
Ver ficha técnica →AD7190BRUZ-REEL
✓ Em estoque
$6.5 / unidade
Ver ficha técnica →AD7191BRUZ
📋 Alternativa de referência (fora do catálogo)
AD7192BRUZ
✓ Em estoque
Consulte o preço
Ver ficha técnica →ADS1256IDB
📋 Alternativa de referência (fora do catálogo)
AD7190WBRUZ Classificações máximas e características elétricas
| Resolução | 24 Bit |
| Number of Channels | 2 Differential, 4 Pseudo-Differential |
| Taxa de amostragem | 4.8 kSPS |
| Input Type | Differential, Pseudo-Differential |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| Reference Type | External |
| Voltage - Supply, Analog | 5 V |
| Voltage - Supply, Digital | 2.7 V to 5.25 V |
| Recursos | PGA |
| Faixa de temperatura de operação | -40°C to +105°C |
| Encapsulamento / Caixa | 24-TSSOP |
| Tipo de montagem | Surface Mount |
| Supplier Device Package | 24-TSSOP |
| Number of Bits | 24 |
| Number of Inputs | 2, 4 |
| Ratio - S/H:ADC | 0:1 |
| Number of A/D Converters | 1 |
| Status RoHS | Compliant |
Configuração de pinos do AD7190WBRUZ
| Pino 1 | SCLK — Serial clock input |
| Pino 2 | DIN — Serial data input |
| Pino 3 | DOUT/RDY — Serial data output / ready |
| Pino 4 | CS — Chip select |
| Pino 5 | GND — Ground |
| Pino 6 | AVDD — Analog power supply |
| Pino 7 | AIN1+ — Analog input 1 positive |
| Pino 8 | AIN1- — Analog input 1 negative |
| Pino 9 | AIN2+ — Analog input 2 positive |
| Pino 10 | AIN2- — Analog input 2 negative |
| Pino 11 | REFIN1+ — Reference input 1 positive |
| Pino 12 | REFIN1- — Reference input 1 negative |
| Pino 13 | REFIN2+ — Reference input 2 positive |
| Pino 14 | REFIN2- — Reference input 2 negative |
| Pino 15 | P1 — Digital I/O pin |
| Pino 16 | P2 — Digital I/O pin |
| Pino 17 | SYNC — Synchronization input |
| Pino 18 | RESET — Reset input |
| Pino 19 | DVDD — Digital power supply |
| Pino 20 | DGND — Digital ground |
| Pino 21 | MCLK — Master clock input |
| Pino 22 | MODE — Mode select |
| Pino 23 | NC — No connect |
| Pino 24 | NC — No connect |
Aplicações típicas
AD7190WBRUZ é adequado para 6 aplicaçãos: Weigh Scale Systems, Industrial Process Control, Medical Monitoring Equipment, Temperature Measurement (RTD/Thermocouple), Portable Instrumentation, Precision Data Acquisition Systems.
Weigh Scale Systems
The AD7190WBRUZ is ideal for weigh scale systems due to its 24-bit resolution, low noise, and built-in PGA. It directly interfaces with load cells, providing high accuracy and stability. The device's 4.8 kSPS output rate supports real-time weight monitoring, while the SPI interface simplifies connection to microcontrollers. Its wide temperature range ensures reliable operation in industrial environments.
Recomendado
Industrial Process Control
In industrial process control, the AD7190WBRUZ provides high-resolution conversion of sensor signals such as pressure and temperature. Its sigma-delta architecture and PGA allow direct connection to transducers, reducing external components. The device's SPI interface enables easy integration with PLCs and microcontrollers, while its 4.8 kSPS rate is sufficient for most control loops. The wide operating temperature range makes it suitable for harsh factory environments.
Recomendado
Medical Monitoring Equipment
The AD7190WBRUZ is used in medical monitoring equipment for precise measurement of physiological signals. Its low noise and 24-bit resolution ensure accurate data acquisition, while the PGA accommodates small sensor outputs. The device's compact TSSOP package is suitable for portable devices. The SPI interface allows seamless data transfer to processing units, and the wide temperature range supports various clinical environments.
Recomendado
Temperature Measurement (RTD/Thermocouple)
The AD7190WBRUZ is well-suited for RTD and thermocouple temperature measurement. Its 24-bit resolution and low noise enable precise temperature readings, while the PGA amplifies small thermocouple voltages. The device supports ratiometric measurements with external references, improving accuracy. The SPI interface simplifies integration with microcontrollers, and the 4.8 kSPS rate allows fast temperature updates. Its wide temperature range ensures reliable operation in industrial settings.
Recomendado
Portable Instrumentation
The AD7190WBRUZ is ideal for portable instrumentation due to its low power consumption and compact TSSOP package. It provides high-resolution conversion for battery-powered devices, such as handheld multimeters and data loggers. The SPI interface allows efficient communication with low-power microcontrollers. The device's wide operating temperature range ensures reliable performance in various environments, and its PGA reduces the need for external amplification, saving board space and power.
Recomendado
Precision Data Acquisition Systems
The AD7190WBRUZ is a key component in precision data acquisition systems, offering 24-bit resolution and low noise for accurate signal digitization. Its sigma-delta architecture and PGA enable direct connection to various sensors, while the SPI interface facilitates integration with data acquisition boards. The device's 4.8 kSPS rate supports high-throughput measurements, and its wide temperature range makes it suitable for laboratory and industrial applications.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD7190WBRUZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD7190BRUZ | AD7190BRUZ-REEL | AD7191BRUZ | AD7192BRUZ | ADS1256IDB |
|---|---|---|---|---|---|---|
| Package | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Sampling Rate | 4.8 kSPS | 4.8 kSPS | 4.8 kSPS | 4.8 kSPS | 4.8 kSPS | 30 kSPS |
| Number of Channels | 2 Differential, 4 Pseudo-Differential | 2 Differential, 4 Pseudo-Differential | 2 Differential, 4 Pseudo-Differential | 2 Differential, 4 Pseudo-Differential | 2 Differential, 4 Pseudo-Differential | 8 Single-Ended, 4 Differential |
| Built-in PGA | Yes | Yes | Yes | Yes | Yes | Yes |
| Interface | SPI | SPI | SPI | SPI | SPI | SPI |
| Operating Temperature Range | -40°C to +105°C | -40°C to +85°C | -40°C to +85°C | -40°C to +105°C | -40°C to +105°C | -40°C to +85°C |
Principais diferenciais
- Wide temperature range (-40°C to +105°C) (vs AD7190BRUZ)
- Higher accuracy than AD7191 (vs AD7191BRUZ)
- Lower noise than ADS1256 (vs ADS1256IDB)
Notas de projeto
Decouple the AVDD pin with a 10 µF and 0.1 µF capacitor in parallel, placed as close to the pin as possible. Use a low-noise analog supply for AVDD to maintain the ADC's noise performance. The digital supply (DVDD) can be derived from a separate 3.3 V rail, but ensure proper isolation to prevent digital noise from coupling into the analog section.
Use a solid ground plane under the ADC and keep analog and digital grounds separate, connecting them at a single point. Route the SPI lines (SCLK, DIN, DOUT/RDY, CS) away from analog inputs to minimize crosstalk. Place the reference decoupling capacitors close to the REFIN pins to ensure stable reference voltage.
Ensure the reference voltage is stable and low-noise, as it directly affects conversion accuracy. Calibrate the PGA offset and gain during system initialization to compensate for input offsets. Avoid exceeding the absolute maximum ratings on the analog inputs, as this can damage the device. Use series resistors to limit input current if overvoltage is possible.
Informações de conformidade
RoHS compliant per Analog Devices product page. Other compliance information not specified in the provided data.
