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Analog Devices Inc. AD7175-8BCPZ-RL7
- Part No.:
- AD7175-8BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7175-8BCPZ-RL7.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 40LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,187
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Product details
Overview
AD7175-8BCPZ-RL7 from Analog Devices is a 24-bit, sigma-delta analog-to-digital converter with 8 fully differential or 16 single-ended input channels, 250 kSPS maximum output data rate, ±1 ppm INL, and true rail-to-rail analog/reference input buffers - deployed in high-precision multichannel industrial data acquisition systems such as PLC/DCS modules and chromatography instruments.
For engineers reviewing the AD7175-8BCPZ-RL7 datasheet, AD7175-8BCPZ-RL7 pinout, AD7175-8BCPZ-RL7 application, or AD7175-8BCPZ-RL7 equivalent, key selection criteria include channel scan settling time (20 µs), 50/60 Hz simultaneous rejection at 27.27 SPS, per-channel configurable filters and calibration, and LFCSP-40 package compatibility with high-density PCB layouts.
Technical Context
The AD7175-8BCPZ-RL7 integrates a crosspoint multiplexer enabling per-channel signal routing, selectable sinc5+sinc1 or sinc3 digital filters, and independent offset/gain calibration registers for each of up to 16 channels. Its Σ-Δ modulator delivers 24 noise-free bits at 20 SPS and 17.2 noise-free bits at 250 kSPS.
It supports dual reference configurations (internal 2.5 V ±2 ppm/°C reference or external REF+/REF−), split-supply operation (±2.5 V AVDD1/AVSS), and flexible digital interface modes including SPI, QSPI, and MICROWIRE with Schmitt-triggered SCLK for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no missing codes; enables 1 ppm-level system accuracy in precision measurement. |
| Output Data Rate | 5 SPS to 250 kSPS; supports both slow-scan high-resolution and fast multichannel monitoring modes. |
| INL | ±1 ppm of FSR with buffers enabled; ensures linearity critical for calibration-critical instrumentation. |
| Channel Scan Settling | 20 µs per channel at 50 kSPS; allows full 8-channel scan in 160 µs with guaranteed settled data. |
| 50/60 Hz Rejection | 85 dB at 50 ms settling; eliminates mains interference without external notch filtering. |
| Reference | On-chip 2.5 V bandgap (±2 ppm/°C drift); reduces BOM count and improves thermal stability vs. external refs. |
| Supply Range | AVDD1–AVSS = 4.5 V to 5.5 V or ±2.5 V; supports isolated analog domains in industrial power architectures. |
Pinout & Package
The AD7175-8BCPZ-RL7 is housed in a 40-lead, 6 mm × 6 mm LFCSP package with exposed pad soldered to AVSS for thermal and mechanical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0/REF2− to AIN15 | Analog input / reference negative | 40-pin mapping supports 16 single-ended or 8 differential inputs via crosspoint mux; REF2− accepts external ref down to AVSS. |
| REF+ / REF− | External reference positive/negative | Accepts 1 V to AVDD1 differential reference; enables ratiometric or absolute measurement flexibility. |
| REFOUT | Internal reference buffered output | 2.5 V ±2 ppm/°C output; drives external circuitry or serves as stable reference for auxiliary stages. |
| DOUT/RDY | Data output / conversion ready | Combines serial data output and interrupt-capable RDY signal; simplifies host polling or IRQ-driven firmware. |
| SCLK, DIN, CS | Serial interface clock/data/select | Schmitt-triggered SCLK supports opto-isolation; 3-/4-wire SPI/QSPI/MICROWIRE compatible. |
| GPIO0–GPIO1, GPO2–GPO3 | General-purpose I/O | AVDD1/AVSS-referenced pins usable for sync control, status indication, or external MUX coordination. |
| SYNC | Multi-device synchronization input | Aligns digital filter and modulator phases across multiple AD7175-8BCPZ-RL7 units for coherent sampling. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel configuration | Independent filter type, ODR, gain, offset, and buffer enable per input - eliminates channel crosstalk in mixed-signal setups. |
| True rail-to-rail buffers | Enables direct connection of high-impedance sensors (e.g., RTDs, thermocouples) without external op-amps or level-shifting. |
| Enhanced 50/60 Hz rejection | Simultaneous 85 dB rejection at 27.27 SPS using dedicated filter mode - removes AC line noise without sacrificing update rate. |
| Internal temperature sensor | ±2°C accuracy after user calibration at 25°C; provides on-chip thermal monitoring for drift compensation or safety logic. |
| Power-down switch (PDSW) | 24 Ω RON switch tied to AVSS; allows controlled shutdown of external circuitry (e.g., sensor excitation) synchronized with ADC sleep. |
Applications
| PLC Analog Input Module | Medical Multichannel Monitor |
|---|---|
|
Use Scenario: High-density 16-channel voltage/current acquisition in modular programmable logic controllers with isolation barriers. IC Role / Device Role / Timing Role: Primary ADC front-end with per-channel programmable gain, filtering, and calibration - handles sensor signals from 0–10 V, ±10 V, and 4–20 mA transmitters. Use Value: 20 µs channel settling and 50/60 Hz rejection eliminate need for external anti-aliasing or notch filters, reducing board area and component count. |
Use Scenario: Simultaneous acquisition of ECG, EEG, and bioimpedance signals in portable diagnostic equipment. IC Role / Device Role / Timing Role: Precision multichannel digitizer with true rail-to-rail input buffers - interfaces directly with low-output-impedance electrode amplifiers and reference electrodes. Use Value: 24 noise-free bits at 20 SPS enable sub-microvolt resolution required for microvolt-level biopotential detection. |
| Chromatography Detector | High-Accuracy Pressure Transmitter |
|
Use Scenario: Signal conditioning for FID, TCD, or UV detectors in gas/liquid chromatography systems requiring long-term baseline stability. IC Role / Device Role / Timing Role: Low-drift, low-noise ADC capturing detector analog outputs with integrated 2.5 V reference and per-channel offset calibration. Use Value: ±1 ppm INL and ±2 ppm/°C reference drift ensure <0.005% FS error over temperature - critical for quantitative peak integration. |
Use Scenario: Digital pressure sensor module with MEMS bridge, temperature compensation, and HART/modbus output. IC Role / Device Role / Timing Role: Core ADC for ratiometric bridge readout with internal reference buffering and burnout current sources for open-wire diagnostics. Use Value: Integrated ±10 µA burnout currents and GPIO-controlled PDSW allow automated sensor health checks without additional discrete components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7177-2BRUZ | 16-channel, 32-bit, 10 kSPS max; higher resolution but lower speed; no crosspoint mux; 24-lead TSSOP. | Better suited for ultra-low-noise DC measurements (e.g., weigh scales), not high-speed scanning. | Select when 32-bit resolution and <100 nV rms noise outweigh channel count and scan speed requirements. |
| ADS131M08IPBSR | 8-channel, 24-bit, 64 kSPS; integrated PGA and VREF; no internal reference buffer; 48-lead TQFP. | Optimized for battery-powered portables; lacks true rail-to-rail buffers and 50/60 Hz simultaneous rejection. | Prefer for cost-sensitive, lower-power designs where external buffering and filtering can be added. |
Compared with AD7175-8BCPZ-RL7, AD7177-2BRUZ trades scan speed and channel flexibility for deeper resolution in static measurements, while ADS131M08IPBSR sacrifices rail-to-rail input capability and advanced filtering for smaller footprint and lower supply current - making AD7175-8BCPZ-RL7 optimal for industrial multichannel scanning with stringent noise and line-rejection demands.
Availability
AD7175-8BCPZ-RL7 is available at Aetrix Electronics and suitable for process control systems, medical instrumentation, and analytical equipment requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for AD7175-8BCPZ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7175-8BCPZ-RL7 belongs to Analog Devices' precision Σ-Δ ADC product line, engineered for industrial and scientific instrumentation demanding high channel density, low drift, and robust noise immunity in harsh environments.
FAQ
What is the maximum channel scan rate of the AD7175-8BCPZ-RL7?
The AD7175-8BCPZ-RL7 achieves a maximum channel scan rate of 50 kSPS per channel with guaranteed 20 µs settling time. This allows full acquisition across all 8 differential or 16 single-ended inputs within 160 µs when configured for continuous scanning - essential for real-time multichannel monitoring in PLC and DCS applications. The AD7175-8BCPZ-RL7 maintains this performance across its full −40°C to +105°C operating range.
Does the AD7175-8BCPZ-RL7 support simultaneous 50 Hz and 60 Hz rejection?
Yes, the AD7175-8BCPZ-RL7 provides simultaneous 50 Hz and 60 Hz rejection of 85 dB at a 27.27 SPS output data rate using its enhanced digital filter mode. This feature is implemented in hardware and requires no external components or firmware overhead. The AD7175-8BCPZ-RL7 achieves this with guaranteed 50 ms settling, making it ideal for global deployments where mains frequency varies by region.
Can the AD7175-8BCPZ-RL7 operate with split analog supplies?
Yes, the AD7175-8BCPZ-RL7 supports split-supply operation with AVDD1/AVSS set to ±2.5 V, in addition to single 5 V (AVDD1–AVSS) operation. This enables direct interfacing with bipolar sensor outputs and isolated analog domains. The AD7175-8BCPZ-RL7 maintains full specification compliance - including INL, noise, and reference stability - under both supply configurations.
What is the role of the PDSW pin on the AD7175-8BCPZ-RL7?
The PDSW (Power-Down Switch) pin on the AD7175-8BCPZ-RL7 is an AVSS-referenced open-drain output controlled via the GPIOCON register. With 24 Ω RON and 16 mA allowable current, it enables synchronized shutdown of external circuitry - such as sensor excitation sources or front-end amplifiers - during ADC standby or power-down modes. This feature is integral to the AD7175-8BCPZ-RL7's low-power system design capability.
How does the crosspoint multiplexer in the AD7175-8BCPZ-RL7 improve system flexibility?
The crosspoint multiplexer in the AD7175-8BCPZ-RL7 allows any analog input pin (AIN0–AIN15) to be routed to either ADC input pair (AIN+/AIN−), enabling dynamic reconfiguration of differential pairs without hardware changes. Combined with per-channel setup registers, this lets the AD7175-8BCPZ-RL7 handle mixed signal types (voltage, current, ratiometric) across one device - reducing channel-to-channel crosstalk and eliminating external switching ICs in complex DAQ systems.
AD7175-8BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 8, 16
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2V ~ 5.5V
- Voltage - Supply, Digital:
- 2V ~ 5.5V
- Features:
- Temperature Sensor
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 40-LFCSP-WQ (6x6)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7175-8BCPZ-RL7 FAQ
1.How can I place an order for AD7175-8BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7175-8BCPZ-RL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7175-8BCPZ-RL7 reliable?
The price and inventory of AD7175-8BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7175-8BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7175-8BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7175-8BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7175-8BCPZ-RL7?
AD7175-8BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7175-8BCPZ-RL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7175-8BCPZ-RL7?
For technical support, including AD7175-8BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7175-8BCPZ-RL7 requirements.
6.How does Aetrix verify that AD7175-8BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7175-8BCPZ-RL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7175-8BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7175-8BCPZ-RL7?
All AD7175-8BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7175-8BCPZ-RL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7175-8BCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD7175-8BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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