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Analog Devices Inc. AD7176-2BRUZ
- Part No.:
- AD7176-2BRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7176-2BRUZ.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,047
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Product details
Overview
AD7176-2BRUZ from Analog Devices is a 24-bit, sigma-delta analog-to-digital converter (ADC) with 20 µs settling time, 250 kSPS maximum output data rate, ±2.5 ppm FSR INL, and integrated 2.5 V reference (2 ppm/°C drift), designed for high-accuracy multichannel industrial measurement in PLC/DCS modules and chromatography systems.
For engineers reviewing the AD7176-2BRUZ datasheet, AD7176-2BRUZ pinout, AD7176-2BRUZ application, or AD7176-2BRUZ equivalent, key selection criteria include channel scan rate (50 kSPS/channel), noise-free resolution (17–22 bits across 5 SPS–250 kSPS), sinc5+sinc1 vs. sinc3 filter trade-offs, and TSSOP-24 package compatibility with external multiplexer control via GPIO0/GPIO1.
Technical Context
The AD7176-2BRUZ integrates a crosspoint multiplexer supporting two fully differential or four pseudo-differential inputs, with automatic external MUX control via GPIO pins. Its digital filter architecture includes three user-selectable modes: sinc5+sinc1 for fast 20 µs settling at 50 kSPS/channel, sinc3 for maximum resolution at low speeds, and a dedicated 50/60 Hz rejection filter enabling simultaneous line-frequency rejection at 27 SPS.
It features dual LDOs (AVDD2 and IOVDD supplies independent), internal 16 MHz oscillator or external crystal/clock support, and per-channel calibration for offset/gain errors. The buffered 2.5 V reference (±2 ppm/°C typical drift) eliminates need for external precision references in most applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no missing codes; noise-free resolution = 17.3 bits @ 250 kSPS, 20.1 bits @ 2.5 kSPS, 22.4 bits @ 5 SPS |
| Settling Time | 20 µs - enables full 50 kSPS/channel scan rate with 17 noise-free bits settled |
| INL Error | ±2.5 ppm of FSR - ensures <0.00025% full-scale linearity error in precision sensor interfaces |
| Reference | Integrated 2.5 V band gap reference, 2 ppm/°C max drift - eliminates external reference component and layout complexity |
| Power Supply | Single supply: AVDD1 = 5 V, AVDD2 = 2–5 V, IOVDD = 2–5 V; total current = 7.8 mA typical - supports mixed-voltage system integration |
| Rejection | 130 dB @ 50/60 Hz (20 SPS ODR) - enables direct AC mains–immunity in noisy industrial environments without external notch filters |
| Digital Interface | SPI/QSPI/MICROWIRE/DSP-compatible 3-/4-wire serial interface with Schmitt-triggered SCLK - robust against EMI and compatible with opto-isolation |
Pinout & Package
The AD7176-2BRUZ is housed in a 24-lead TSSOP package (JEDEC MO-153, 7.8 mm × 4.4 mm, 0.65 mm pitch), thermally rated at θJA = 81°C/W on 2-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN4 | Analog input terminals | Support 2 fully differential (e.g., AIN0/AIN1 + AIN2/AIN3) or 4 pseudo-differential channels via internal crosspoint mux |
| REF+, REF− | Reference voltage terminals | Accept external 1–AVDD1 V reference; internal 2.5 V reference sourced from REFOUT |
| REFOUT | Buffered internal reference output | 2.5 V ±0.16% initial accuracy, 2 ppm/°C drift - usable as precision reference for external circuitry |
| GPIO0, GPIO1 | General-purpose I/O | Configurable as outputs to control external analog multiplexers synchronously with ADC channel switching |
| SYNC/ERROR | Multi-function synchronization/error pin | Enables deterministic timing alignment across multiple AD7176-2BRUZ devices or reports error conditions via open-drain output |
| DOUT/RDY | Dual-function serial data/output ready | Provides conversion-complete interrupt (RDY low) and SPI data output - simplifies interrupt-driven firmware design |
| XTAL1 / CLKIO/XTAL2 | Clock interface | Supports internal 16 MHz oscillator, external crystal (14–16.384 MHz), or external CMOS clock - enables flexible timing architecture |
Key Features
| Feature | Design Value |
|---|---|
| Fast channel scan | 50 kSPS/channel with 20 µs settling - enables real-time monitoring of up to 4 temperature/pressure sensors in single IC |
| Three digital filter modes | sinc5+sinc1 (speed), sinc3 (resolution), and enhanced 50/60 Hz rejection - eliminates need for external digital post-processing |
| Per-channel calibration | Independent offset/gain correction registers for each of 4 channels - removes system-level calibration burden |
| Integrated reference buffer | REFOUT drives ≥10 mA load with 32 ppm/mA load regulation - powers external amplifiers or DACs without additional buffers |
| Robust serial interface | Schmitt-triggered SCLK + CRC error checking - ensures reliable communication in electrically noisy factory-floor environments |
Applications
| PLC Analog Input Module | Chromatography Detector Interface |
|---|---|
Use Scenario: High-density analog input card acquiring signals from 4–8 RTD/thermocouple transmitters in a compact 19-inch rack unit. IC Role / Device Role / Timing Role: Primary ADC with integrated crosspoint mux and per-channel calibration handles all signal conditioning and digitization. Use Value: 20 µs settling enables full 50 kSPS/channel scan across 4 channels within 80 µs - meets IEC 61000-4-3 immunity requirements without added latency. |
Use Scenario: Digitizing low-level picoampere current output from flame ionization detectors (FID) in gas chromatographs. IC Role / Device Role / Timing Role: Precision front-end ADC with 22.4 noise-free bits at 5 SPS and 130 dB 50/60 Hz rejection suppresses mains-induced baseline drift. Use Value: Integrated 2.5 V reference eliminates external reference drift contribution - improves long-term retention time accuracy by >0.1% over 8-hour runs. |
| Medical Multichannel EEG Recorder | Industrial Pressure Transmitter Calibration Station |
Use Scenario: 16-channel portable EEG system requiring low power, high CMRR, and simultaneous sampling across all electrodes. IC Role / Device Role / Timing Role: ADC configured in continuous conversion mode with sinc3 filter delivers 20.1 noise-free bits at 2.5 kSPS per channel. Use Value: 95 dB DC common-mode rejection and 85–90 dB normal-mode rejection at 50/60 Hz reduce electrode-skin interface artifacts without guard driving. |
Use Scenario: Automated benchtop calibrator verifying 4–20 mA HART pressure transmitters against NIST-traceable standards. IC Role / Device Role / Timing Role: Reference-grade ADC digitizes precision shunt voltage with programmable ODR (5–250 kSPS) for dynamic step-response analysis. Use Value: ±2.5 ppm FSR INL and ±110 nV/°C offset drift ensure calibration uncertainty <10 ppm - meets ISO/IEC 17025 metrology lab requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7177-2BRUZ | 32-bit resolution, 10 kSPS max ODR, 250 nV/√Hz noise density, same TSSOP-24 package and pinout | Targeted at ultra-low-noise DC measurements (e.g., weigh scales), not high-speed scanning | Select AD7177-2BRUZ only when sub-100 nV RMS noise and <1 ppm INL are required; AD7176-2BRUZ better suits 50 kSPS/channel multichannel systems. |
| ADS127L11IPWR | 24-bit, 400 kSPS, 125 µVpp noise, no integrated reference, 20-pin VQFN package | Optimized for high-speed motor control feedback, lacks 50/60 Hz rejection filters and crosspoint mux | Choose ADS127L11IPWR for bandwidth-critical servo loops; AD7176-2BRUZ preferred where line-frequency immunity and multichannel flexibility are mandatory. |
Compared with AD7177-2BRUZ, the AD7176-2BRUZ trades ultimate DC resolution for 5× faster channel scan capability and built-in 50/60 Hz rejection; versus ADS127L11IPWR, it adds integrated reference, GPIO-controlled MUX sync, and superior AC line immunity at the cost of lower max ODR and larger package.
Availability
AD7176-2BRUZ is available at Aetrix Electronics and suitable for process control PLC/DCS modules, chromatography detector interfaces, medical multichannel EEG recorders, industrial pressure transmitter calibration stations, and scientific instrumentation requiring stable component supply with guaranteed long-term sourcing.
Supply support for AD7176-2BRUZ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing operations worldwide.
The AD7176-2BRUZ belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for high-accuracy, multichannel industrial and scientific data acquisition where speed, resolution, and noise immunity must coexist without external support components.
FAQ
What is the maximum channel scan rate supported by the AD7176-2BRUZ?
The AD7176-2BRUZ achieves a maximum channel scan rate of 50 kSPS per channel with guaranteed 20 µs settling time and 17 noise-free bits. This is enabled by its sinc5+sinc1 digital filter configuration and integrated crosspoint multiplexer, allowing rapid sequential acquisition across up to four pseudo-differential inputs without external switching hardware. The AD7176-2BRUZ maintains full specification compliance at this rate under −40°C to +105°C operating conditions.
Does the AD7176-2BRUZ require an external reference voltage?
No, the AD7176-2BRUZ includes a fully buffered, factory-trimmed 2.5 V internal reference with ±2 ppm/°C typical temperature coefficient and ±0.16% initial accuracy. REFOUT can directly drive external circuitry with up to ±10 mA load. An external reference may be used via REF+ and REF− pins if higher initial accuracy or different voltage levels (1 V to AVDD1) are needed, but it is not required for standard operation of the AD7176-2BRUZ.
Can the AD7176-2BRUZ synchronize multiple devices for simultaneous sampling?
Yes, the AD7176-2BRUZ supports deterministic multi-device synchronization via its SYNC/ERROR pin. When configured as a synchronization input, it aligns digital filter and analog modulator timing across multiple AD7176-2BRUZ units - essential for phase-coherent multichannel acquisition. This feature is documented in the AD7176-2BRUZ datasheet Rev. D, Section "Synchronization (SYNC/ERROR)" and requires no external timing controller.
What digital interface protocols does the AD7176-2BRUZ support?
The AD7176-2BRUZ supports SPI, QSPI, MICROWIRE, and DSP-compatible 3-wire or 4-wire serial interfaces. Its SCLK input includes a Schmitt trigger for noise immunity, and CRC error checking is implemented in hardware. All register reads/writes use the same command structure regardless of protocol, and the AD7176-2BRUZ operates with IOVDD from 2 V to 5.5 V - enabling direct interfacing with 1.8 V, 3.3 V, or 5 V microcontrollers without level shifters.
How does the AD7176-2BRUZ handle 50 Hz and 60 Hz interference in industrial environments?
The AD7176-2BRUZ incorporates a dedicated digital filter mode that provides simultaneous 130 dB rejection of both 50 Hz and 60 Hz line frequencies at 20 SPS output data rate, with 36 ms settling time. Unlike standard sinc filters, this enhanced mode is optimized for real-world AC mains noise and does not require external notch filters or software post-processing - a capability confirmed in the AD7176-2BRUZ datasheet Rev. D, Table 1 and Section "Enhanced 50 Hz and 60 Hz Rejection Filters".
AD7176-2BRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Pseudo-Differential
- 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:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7176-2BRUZ FAQ
1.How can I place an order for AD7176-2BRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7176-2BRUZ 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 AD7176-2BRUZ reliable?
The price and inventory of AD7176-2BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7176-2BRUZ is usually 5 days.
3.What payment methods are accepted for AD7176-2BRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7176-2BRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7176-2BRUZ?
AD7176-2BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7176-2BRUZ 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 AD7176-2BRUZ?
For technical support, including AD7176-2BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7176-2BRUZ requirements.
6.How does Aetrix verify that AD7176-2BRUZ is sourced from the original manufacturer or authorized distributors?
All AD7176-2BRUZ 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 AD7176-2BRUZ meets industry standards.
7.What is the process for return or replacement of AD7176-2BRUZ?
All AD7176-2BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7176-2BRUZ, 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 AD7176-2BRUZ part is unused and in its original packaging.
Return procedure for AD7176-2BRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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