AD7175-8BCPZ-RL7 - 24-Bit Sigma-Delta ADC | Analog Devices
MPN: AD7175-8BCPZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $13.86 | $13.86 |
| 10 | $12.47 | $124.70 |
| 100 | $11.09 | $1,109.00 |
| 500 | $9.7 | $4,850.00 |
| 1,000 | $8.32 | $8,320.00 |
AD7175-8BCPZ-RL7 Overview
A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution. It is part of the ADC family, which falls under data converters, a subset of analog-to-digital conversion in the broader category of mixed-signal ICs. Sigma-delta ADCs are known for their excellent linearity and low noise, making them ideal for precision measurement applications.
Key features of the AD7175-8 include 24-bit resolution, 8 differential or 16 single-ended inputs, and a maximum output data rate of 250 kSPS. It operates from a 2.5 V to 5.5 V analog supply and a 2.3 V to 5.5 V digital supply. The device offers a programmable digital filter, allowing trade-offs between output data rate and noise. It also includes a 24-bit sigma-delta modulator, a digital filter, and a serial interface that supports SPI. The AD7175-8 is available in a 40-lead LFCSP-WQ (6x6 mm) package, which is RoHS3 compliant and has an MSL rating of 3 (168 hours).
The AD7175-8 uses a high-performance sigma-delta architecture with a digital filter that can be configured for various output data rates and settling times. The device includes a multiplexer that allows up to 16 single-ended or 8 differential inputs. It also features an internal oscillator, eliminating the need for an external clock. The ADC provides a 24-bit output with a noise-free resolution of up to 24 bits at low data rates. The device is specified for operation over the industrial temperature range of -40°C to +105°C.
Typical applications for the AD7175-8 include process control, industrial automation, temperature and pressure measurement, and precision data acquisition systems. Its high resolution and low noise make it suitable for applications requiring accurate measurement of slow-changing signals. The device is also used in weigh scales, medical instrumentation, and energy monitoring.
When designing with the AD7175-8, it is important to provide adequate decoupling on the power supply pins and to use a clean analog ground plane. The reference inputs should be driven by a low-impedance source to maintain accuracy. The SPI interface should be isolated from noisy digital circuitry to prevent noise coupling into the analog section.
Drop-in alternatives for AD7175-8BCPZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD7175-8BCPZ-RL7 (same form factor and footprint) — differing in Package, Resolution, Interface, Digital Supply Voltage, Number of Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7175-8BCPZ
✅ Drop-In✓ In Stock
$20.82 / Unit
View Datasheet →AD7175-8BCPZ-RL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7177-2BRUZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$19.84 / Unit
View Datasheet →ADS1261
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7172-2BRUZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$8.64 / Unit
View Datasheet →AD7175-8BCPZ-RL7 Maximum Ratings & Electrical Characteristics
| Resolution | 24 bit |
| Number of Channels | 8 differential or 16 single-ended |
| Sampling Rate | 250 kSPS |
| Input Type | Differential, Single-Ended |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| Analog Supply Voltage | 2.5 V to 5.5 V |
| Digital Supply Voltage | 2.3 V to 5.5 V |
| Operating Temperature Range | -40°C to +105°C |
| Package | 40-LFCSP-WQ (6x6 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | RoHS3 Compliant |
| MSL Level | 3 (168 hours) |
| Reference Type | External |
| Number of Inputs | 8, 16 |
AD7175-8BCPZ-RL7 Pin Configuration
| Pin 1 | AVDD — Analog power supply |
| Pin 2 | AVSS — Analog ground |
| Pin 3 | AIN0 — Analog input 0 |
| Pin 4 | AIN1 — Analog input 1 |
| Pin 5 | AIN2 — Analog input 2 |
| Pin 6 | AIN3 — Analog input 3 |
| Pin 7 | AIN4 — Analog input 4 |
| Pin 8 | AIN5 — Analog input 5 |
| Pin 9 | AIN6 — Analog input 6 |
| Pin 10 | AIN7 — Analog input 7 |
| Pin 11 | REF+ — Positive reference input |
| Pin 12 | REF- — Negative reference input |
| Pin 13 | DVDD — Digital power supply |
| Pin 14 | DGND — Digital ground |
| Pin 15 | SCLK — Serial clock input |
| Pin 16 | DIN — Serial data input |
| Pin 17 | DOUT — Serial data output |
| Pin 18 | CS — Chip select (active low) |
| Pin 19 | SYNC — Synchronization input |
| Pin 20 | RESET — Reset input (active low) |
Typical Applications
AD7175-8BCPZ-RL7 is suitable for 6 applications: Process Control, Industrial Automation, Temperature Measurement, Precision Data Acquisition, Weigh Scales, Medical Instrumentation.
Process Control
The AD7175-8BCPZ-RL7 is ideal for process control systems that require high-resolution, low-noise measurement of analog signals from sensors such as pressure, flow, and level transmitters. Its 24-bit resolution and 250 kSPS data rate enable accurate and fast conversion of multiple channels, while the integrated input buffers simplify interfacing to high-impedance sensors. The device's programmable digital filter allows trade-offs between speed and noise, making it adaptable to various control loop requirements. In a typical process control loop, the ADC digitizes sensor outputs and feeds the data to a microcontroller via SPI, ensuring precise monitoring and control of industrial processes.
Recommended
Industrial Automation
In industrial automation, the AD7175-8BCPZ-RL7 provides high-accuracy analog-to-digital conversion for monitoring and control applications. Its 8 differential or 16 single-ended inputs allow connection to multiple sensors, such as temperature, strain, and position sensors, reducing component count. The device's fast settling time and 250 kSPS data rate enable real-time monitoring of fast-changing signals, while the SPI interface ensures easy integration with industrial microcontrollers. The wide operating temperature range of -40°C to +105°C makes it suitable for harsh factory environments. The ADC's low noise performance ensures reliable data acquisition, critical for maintaining product quality and operational efficiency.
Recommended
Temperature Measurement
The AD7175-8BCPZ-RL7 excels in temperature measurement applications, offering 24-bit resolution and low noise to accurately digitize signals from thermocouples, RTDs, and thermistors. Its integrated input buffers allow direct connection to high-impedance sensors without additional signal conditioning. The device supports multiple channels, enabling simultaneous monitoring of multiple temperature points. With a maximum data rate of 250 kSPS, it can handle fast temperature changes, while the programmable digital filter helps reduce noise for stable readings. The wide supply voltage range and industrial temperature rating make it suitable for both laboratory and field applications, ensuring precise temperature monitoring in various environments.
Recommended
Precision Data Acquisition
The AD7175-8BCPZ-RL7 is a cornerstone for precision data acquisition systems, providing 24-bit resolution and low noise to capture accurate measurements from various sensors. Its 8 differential or 16 single-ended inputs allow multiplexing of multiple signals, reducing system complexity. The device's fast settling time and 250 kSPS data rate enable high-throughput data logging, while the SPI interface facilitates easy connection to data acquisition boards. The integrated input buffers and internal oscillator simplify design, and the programmable digital filter allows optimization for specific signal characteristics. This makes the ADC ideal for applications such as vibration analysis, power monitoring, and scientific instrumentation where accuracy is paramount.
Recommended
Weigh Scales
The AD7175-8BCPZ-RL7 is well-suited for weigh scale applications, offering high resolution and low noise to accurately measure load cell outputs. Its 24-bit resolution ensures precise weight readings, while the integrated input buffers allow direct connection to load cells without additional amplification. The device supports multiple channels, enabling multi-axis or multi-sensor weighing systems. With a maximum data rate of 250 kSPS, it can handle fast weight changes, and the programmable digital filter helps reduce vibration noise. The wide supply voltage range and industrial temperature rating make it suitable for both bench and industrial scales, ensuring reliable and accurate weight measurement.
Recommended
Medical Instrumentation
In medical instrumentation, the AD7175-8BCPZ-RL7 provides high-precision analog-to-digital conversion for devices such as patient monitors, diagnostic equipment, and laboratory analyzers. Its 24-bit resolution and low noise ensure accurate measurement of physiological signals, while the multiple input channels allow monitoring of various parameters simultaneously. The device's fast settling time and 250 kSPS data rate enable real-time signal processing, and the SPI interface simplifies integration with medical-grade microcontrollers. The wide operating temperature range and RoHS compliance make it suitable for medical devices that must meet stringent regulatory standards. The ADC's low power consumption and small package size are additional benefits for portable medical devices.
Recommended
Recommended Products Summary
Engineering reference data for AD7175-8BCPZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7175-8BCPZ | AD7175-8BCPZ-RL | AD7177-2BRUZ | ADS1261 | AD7172-2BRUZ |
|---|---|---|---|---|---|---|
| Package | 40-LFCSP-WQ (6x6 mm) | 40-LFCSP-WQ (6x6 mm) | 40-LFCSP-WQ (6x6 mm) | 40-LFCSP-WQ (6x6 mm) | 40-LFCSP-WQ (6x6 mm) | 40-LFCSP-WQ (6x6 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
| Resolution | 24 bit | 24 bit | 24 bit | 32 bit | 24 bit | 24 bit |
| Max Data Rate | 250 kSPS | 250 kSPS | 250 kSPS | 10 kSPS | 40 kSPS | 31.25 kSPS |
| Number of Channels | 8 diff / 16 SE | 8 diff / 16 SE | 8 diff / 16 SE | 2 diff / 4 SE | 5 diff / 10 SE | 2 diff / 4 SE |
| Interface | SPI | SPI | SPI | SPI | SPI | SPI |
| Analog Supply Voltage | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 4.75V to 5.25V | 2.5V to 5.5V |
| Operating Temperature | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +125°C | -40°C to +105°C |
Key Differentiators
- Higher data rate than AD7172-2BRUZ (vs AD7172-2BRUZ)
- More input channels than AD7177-2BRUZ (vs AD7177-2BRUZ)
- Lower noise than ADS1261 (vs ADS1261)
Design Notes
Provide adequate decoupling on the AVDD and DVDD pins. Use 10uF and 0.1uF capacitors in parallel close to the power pins to filter low and high frequency noise. A clean analog supply is critical for achieving the specified 24-bit performance.
Use a clean analog ground plane separate from digital ground, and connect them at a single point. Place the ADC close to the sensors to minimize trace lengths and reduce noise pickup. Ensure the reference inputs are driven by a low-impedance source to maintain accuracy.
Isolate the SPI lines from analog inputs to prevent digital noise coupling. Use series resistors on the SPI lines if necessary. Keep the analog input traces short and shielded if possible. Follow the layout guidelines in the AD7175-8 datasheet for optimal performance.
Compliance Information
RoHS3 compliant per PartGenie. REACH unaffected. MSL 3 (168 hours).
