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Analog Devices Inc. AD7175-8BCPZ
- Part No.:
- AD7175-8BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7175-8BCPZ.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 40LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:424
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Product details
Overview
AD7175-8BCPZ from Analog Devices is a 24-bit, sigma-delta analog-to-digital converter with true rail-to-rail buffered inputs, supporting up to 8 fully differential or 16 single-ended channels, 250 kSPS maximum output data rate, ±1 ppm INL, and integrated 2.5 V reference. It targets high-precision multichannel industrial measurement systems requiring fast settling (20 µs per channel) and simultaneous 50/60 Hz rejection.
For engineers reviewing the AD7175-8BCPZ datasheet, AD7175-8BCPZ pinout, AD7175-8BCPZ application, or AD7175-8BCPZ equivalent, key selection criteria include channel scan rate (50 kSPS/channel), noise-free resolution (20.2 bits at 2.5 kSPS), rail-to-rail input buffering, crosspoint multiplexer flexibility, and SPI/QSPI-compatible serial interface with CRC and checksum protection.
Technical Context
The AD7175-8BCPZ implements a dual-stage Sinc5 + Sinc1 digital filter architecture enabling simultaneous 50 Hz and 60 Hz line frequency rejection at 27.27 SPS, while supporting user-selectable filters per channel including Sinc3 for single-cycle settling. Its crosspoint multiplexer allows arbitrary routing of 16 analog inputs to 8 differential ADC inputs, with independent configuration of input buffers, reference sources, and gain settings per channel.
It integrates two low-drift LDOs (for analog and digital supplies), an on-chip temperature sensor (±2°C accuracy post-calibration), four GPIOs (two configurable as inputs/outputs, two as outputs only), and power-down switch control via PDSW pin. The device supports internal 16 MHz clock, external crystal (14–16.384 MHz), or external clock input, with Schmitt-triggered SCLK for noise immunity in industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes; delivers 20.2 noise-free bits at 2.5 kSPS for high dynamic range in precision instrumentation. |
| Output Data Rate | 5 SPS to 250 kSPS; enables trade-off between speed and resolution-e.g., 250 kSPS for fast transient capture or 20 SPS for ultra-low-noise DC measurements. |
| INL Error | ±1 ppm of FSR with input buffers enabled; ensures sub-ppm linearity critical for calibration-grade process control and chromatography. |
| Channel Scan Rate | 50 kSPS per channel (20 µs settling); supports real-time multichannel monitoring without inter-channel crosstalk degradation. |
| Reference | Integrated 2.5 V band gap reference with ±2 ppm/°C drift; eliminates need for external precision reference and reduces BOM count. |
| Power Supply | AVDD1/AVSS = 5 V or ±2.5 V; AVDD2 & IOVDD = 2 V to 5 V; enables flexible supply partitioning for noise isolation in mixed-signal systems. |
| Interface | SPI/QSPI/MICROWIRE/DSP-compatible 3-/4-wire serial interface with CRC, checksum, and DOUT/RDY interrupt signaling. |
Pinout & Package
The AD7175-8BCPZ is housed in a 40-lead, 6 mm × 6 mm LFCSP package with exposed thermal pad soldered to AVSS. Pin layout supports signal integrity through dedicated analog/digital ground separation (AVSS, DGND), decoupling pins (REGCAPA, REGCAPD), and isolated reference and analog input routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0/REF2− to AIN15 | Analog input / reference negative | 16 configurable analog inputs; REF2−/REF2+ pins accept external reference up to AVDD1 − 1 V, enabling dual-reference system design. |
| REF+, REF− | Reference 1 input terminals | Dedicated differential reference input path with ±10 mA load capability; supports external references from 1 V to AVDD1. |
| REFOUT | Buffered internal reference output | 2.5 V, ±2 ppm/°C drift output; drives external circuitry directly without buffer amplifiers. |
| DOUT/RDY | Data output / conversion ready flag | Combines serial data output and interrupt signaling-low pulse indicates valid conversion data ready for read. |
| SCLK, DIN, CS | Serial interface control | Schmitt-triggered SCLK enables robust communication across noisy industrial buses; CS low enables 3-wire mode operation. |
| GPIO0, GPIO1, GPO2, GPO3 | General-purpose I/O | Four pins with AVDD1/AVSS-referenced logic; GPIO0/GPIO1 support input/output; GPO2/GPO3 are output-only for status indication or mux control. |
| PDSW | Power-down switch terminal | Open-drain output tied to AVSS; controls external FETs for system-level power gating during standby. |
| XTAL1, XTAL2/CLKIO | Crystal oscillator or clock I/O | Supports 14–16.384 MHz crystal or external clock; CLKIO bidirectional pin simplifies clock tree synchronization across multiple ADCs. |
Key Features
| Feature | Design Value |
|---|---|
| Crosspoint multiplexer | Arbitrarily routes any of 16 analog inputs to 8 differential ADC inputs-enables flexible sensor mapping without external analog switches. |
| True rail-to-rail input buffers | Accepts signals from AVSS to AVDD1 with <±30 nA input bias current-eliminates external op-amps for high-impedance sensor interfacing. |
| Per-channel configuration | Independent setup of gain, buffer enable, reference source, filter type, and calibration registers for each of 16 channels-reduces firmware overhead in heterogeneous sensor systems. |
| Enhanced 50/60 Hz rejection | Simultaneous 85 dB rejection at both frequencies at 27.27 SPS-meets IEC 61000-4-7 compliance for EMC testing in industrial environments. |
| Internal temperature sensor | ±2°C accuracy after single-point calibration at 25°C-provides on-chip thermal monitoring for drift compensation without external sensors. |
Applications
| Process Control Modules | Medical Multichannel Instrumentation |
|---|---|
Use Scenario: PLC/DCS modules acquiring temperature, pressure, and flow sensor data across 16 field transmitters. IC Role / Device Role / Timing Role: Primary high-resolution ADC handling synchronized multi-sensor sampling with per-channel gain/offset calibration. Use Value: 50 kSPS/channel scan rate and 20.2 noise-free bits at 2.5 kSPS ensure accurate, jitter-free acquisition for closed-loop control algorithms. | Use Scenario: Portable patient monitors measuring ECG, SpO₂, and respiration using 8 differential biopotential channels. IC Role / Device Role / Timing Role: Central sigma-delta ADC providing isolated, low-noise digitization with programmable filtering per physiological signal type. Use Value: True rail-to-rail input buffers accept ±2.5 V sensor outputs directly; integrated reference eliminates drift-induced baseline errors in long-duration monitoring. |
| Chromatography Systems | Scientific Data Acquisition |
Use Scenario: HPLC detectors capturing peak elution profiles from photodiode arrays with sub-mV resolution. IC Role / Device Role / Timing Role: Precision ADC digitizing low-level analog detector outputs with simultaneous 50/60 Hz noise rejection. Use Value: 85 dB 50/60 Hz rejection at 27.27 SPS enables clean spectral analysis in electrically noisy lab environments without external notch filters. | Use Scenario: Modular test equipment acquiring voltage, current, and resistance from multiple calibrated sensors in parallel. IC Role / Device Role / Timing Role: Reconfigurable ADC supporting mixed single-ended/differential inputs with on-the-fly filter switching. Use Value: Crosspoint multiplexer and per-channel setup registers allow one hardware design to serve diverse sensor types-reducing development time and inventory complexity. |
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 |
|---|---|---|---|
| AD7177-2BCPZ | 32-bit resolution, 10 kSPS max ODR, 2-channel (not 8/16), no crosspoint mux, higher noise-free bits (23.3 at 10 SPS) | Better suited for ultra-high-resolution single- or dual-channel metrology, not multichannel scanning | Select AD7177-2BCPZ when absolute DC accuracy >23 bits outweighs channel count and scan speed requirements. |
| LTC2500-32IUK#PBF | 32-bit, 1 MSPS, 1-channel, no integrated reference or buffers, requires external driver/reference, SPI-only interface | Targeted at high-speed precision sampling where external component integration is acceptable | Choose LTC2500-32IUK#PBF when system already includes precision reference/buffer stages and needs faster single-channel throughput. |
Compared with AD7175-8BCPZ, AD7177-2BCPZ trades channel count and scan flexibility for higher resolution in static measurements, while LTC2500-32IUK#PBF shifts integration burden to external components but delivers higher speed-making AD7175-8BCPZ optimal for balanced multichannel industrial instrumentation.
Availability
AD7175-8BCPZ is available at Aetrix Electronics and suitable for process control modules, medical instrumentation, chromatography systems, and scientific data acquisition requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for AD7175-8BCPZ 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7175-8BCPZ belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for multichannel, low-bandwidth industrial and scientific measurement applications demanding high linearity, low noise, and flexible signal routing.
FAQ
What is the maximum channel scan rate supported by the AD7175-8BCPZ?
The AD7175-8BCPZ achieves a maximum channel scan rate of 50 kSPS per channel with full settling in 20 µs. This performance is enabled by its optimized modulator and digital filter architecture, allowing rapid sequential sampling across all 16 single-ended or 8 differential inputs without inter-channel settling penalty. The AD7175-8BCPZ maintains this rate while preserving ±1 ppm INL and 20.2 noise-free bits at 2.5 kSPS per channel.
Does the AD7175-8BCPZ require an external reference, or does it include an internal one?
The AD7175-8BCPZ integrates a precision 2.5 V band gap reference with ±2 ppm/°C temperature drift and 4.5 µV rms low-frequency noise. REFOUT provides a buffered output capable of driving external circuitry up to ±10 mA. While external references (1 V to AVDD1) can be used via REF+/REF− or REF2+/REF2−, the internal reference eliminates BOM cost and board space in most industrial applications. The AD7175-8BCPZ supports seamless switching between internal and external references per channel.
How does the crosspoint multiplexer in the AD7175-8BCPZ improve system design flexibility?
The AD7175-8BCPZ's crosspoint multiplexer allows any of its 16 analog input pins (AIN0–AIN15) to be routed to any of the 8 differential ADC input pairs, independently configured per channel. This eliminates the need for external analog switches or complex PCB routing when connecting heterogeneous sensors (e.g., thermocouples, RTDs, strain gauges). The AD7175-8BCPZ uses setup configuration registers to define each channel's input mapping, buffer enable, reference source, and gain-reducing firmware complexity and enabling dynamic reconfiguration during operation.
What digital interface protocols does the AD7175-8BCPZ support, and what reliability features are included?
The AD7175-8BCPZ supports SPI, QSPI, MICROWIRE, and DSP-compatible 3- or 4-wire serial interfaces with Schmitt-triggered SCLK for noise immunity. It includes CRC error detection on register writes, checksum protection for data reads, and configurable DOUT/RDY interrupt signaling. These features ensure robust communication in electrically noisy industrial environments. The AD7175-8BCPZ also supports continuous read mode and automatic register address incrementing to simplify high-throughput data streaming.
Can the AD7175-8BCPZ operate with split analog supplies, and what are the supply voltage requirements?
Yes, the AD7175-8BCPZ supports split analog supplies: AVDD1/AVSS can be configured as ±2.5 V (i.e., AVDD1 = +2.5 V, AVSS = −2.5 V) or as a single 5 V supply (AVDD1 = 5 V, AVSS = 0 V). AVDD2 and IOVDD each operate from 2 V to 5.5 V independently. This dual-supply flexibility enables optimal noise isolation-e.g., AVDD1/AVSS powering sensitive analog circuitry while AVDD2/IOVDD handle digital I/O. The AD7175-8BCPZ specifies operation from −40°C to +105°C under all supported supply configurations.
AD7175-8BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad, CSP
- Packaging:
- Tray
- 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 FAQ
1.How can I place an order for AD7175-8BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7175-8BCPZ 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 reliable?
The price and inventory of AD7175-8BCPZ 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 is usually 5 days.
3.What payment methods are accepted for AD7175-8BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7175-8BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7175-8BCPZ?
AD7175-8BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7175-8BCPZ 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?
For technical support, including AD7175-8BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7175-8BCPZ requirements.
6.How does Aetrix verify that AD7175-8BCPZ is sourced from the original manufacturer or authorized distributors?
All AD7175-8BCPZ 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 meets industry standards.
7.What is the process for return or replacement of AD7175-8BCPZ?
All AD7175-8BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7175-8BCPZ, 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 part is unused and in its original packaging.
Return procedure for AD7175-8BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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