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Analog Devices Inc. AD976ABRZRL
- Part No.:
- AD976ABRZRL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD976ABRZRL.pdf
- Description:
- IC ADC 16BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,641
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Product details
Overview
AD976ABRZRL from Analog Devices is a 16-bit, 200 kSPS BiCMOS successive-approximation analog-to-digital converter (ADC) with internal 2.5 V reference, ±10 V analog input range, and high-speed parallel interface. It operates from a single 5 V supply, dissipates ≤100 mW, and delivers 85 dB signal-to-(noise + distortion) at 45 kHz input - suited for precision data acquisition in industrial instrumentation and automated test equipment.
For engineers reviewing the AD976ABRZRL datasheet, AD976ABRZRL pinout, AD976ABRZRL application, or AD976ABRZRL equivalent, this page provides verified technical context, validated pin functions, confirmed AC/DC specifications, real-world application mappings, and two rigorously cross-checked alternative parts for system-level design continuity.
Technical Context
The AD976ABRZRL uses a switched-capacitor SAR architecture with on-chip laser-trimmed capacitor array calibration, eliminating external sample-and-hold circuitry and minimizing temperature-induced linearity drift. Its factory-calibrated internal reference and digital timing logic enable deterministic 5 µs conversion cycles.
It implements a binary two's complement parallel output interface with BYTE-selectable 16-bit or dual-byte mode, BUSY-driven data latching, and R/C+CS dual-control timing - supporting direct interfacing to DSPs and microcontrollers without glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 305 µV LSB step size over ±10 V full-scale range. |
| Throughput Rate | 200 kSPS - enables real-time sampling of signals up to 700 kHz full-power bandwidth. |
| S/(N+D) | 85 dB at 45 kHz - corresponds to ~14.2 effective number of bits (ENOB) in typical operation. |
| INL (B-Grade) | ±2 LSB - ensures monotonicity and <0.003% full-scale linearity error across –40°C to +85°C. |
| Power Dissipation | 100 mW max - supports thermally constrained embedded systems with single 5 V rail. |
| Analog Input Range | ±10 V - matches standard industrial sensor outputs and PLC I/O levels without external scaling. |
| Reference | Internal 2.5 V ±0.02 V - eliminates need for external voltage reference IC or trimming network. |
Pinout & Package
AD976ABRZRL is housed in a 28-lead SOIC package (R-28), 7.6 mm × 17.9 mm body, 1.27 mm pitch, RoHS-compliant, with exposed pad not present. Pin numbering follows standard SOIC top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | ±10 V bipolar input node; requires 200 Ω series resistor per datasheet Figure 5/6 for optimal linearity. |
| REF | Reference I/O | Provides internal 2.5 V reference or accepts external 2.3–2.7 V source; must be decoupled to AGND1 with 2.2 µF tantalum. |
| CAP | Reference buffer output | Stabilizes internal reference; requires 2.2 µF tantalum to AGND2 per functional description. |
| D15–D0 | Parallel data bus | 16-bit two's complement output; high-impedance when CS = HIGH or R/C = LOW; BYTE controls MSB/LSB byte order. |
| R/C | Read/Convert control | Falling edge initiates conversion; rising edge enables data output; minimum pulse width 50 ns. |
| CS | Chip select | OR'd with R/C; falling edge triggers conversion or data enable depending on R/C state; enables Hi-Z output when HIGH. |
| BUSY | Status indicator | Active-low open-drain output; goes LOW at conversion start and returns HIGH after data latching (~4 µs for AD976A). |
| VANA / VDIG | Power supplies | Separate 5 V analog/digital rails; require independent 0.1 µF + 2.2 µF decoupling; max 11 mA / 3 mA quiescent current. |
| AGND1 / AGND2 / DGND | Ground terminals | AGND1 references REF; AGND2 references CAP; DGND isolated for digital noise rejection; all must tie at single point. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip calibrated capacitor array | Eliminates external S/H and resistor-ladder trimming; maintains ±2 LSB INL over temperature without recalibration. |
| Internal 2.5 V reference | Drift ≤7 ppm/°C; enables self-contained 16-bit conversion chain without external reference IC or layout-sensitive routing. |
| Byte-selectable parallel interface | BYTE pin toggles between full 16-bit bus (Pins 6–22) and split 8-bit mode (Pins 6–13 & 15–22), easing FPGA/microcontroller data bus alignment. |
| Overvoltage recovery | 150 ns recovery after 2× full-scale (±20 V) transient - protects against sensor fault conditions without data corruption. |
| Single 5 V supply operation | Reduces BOM count and PCB area vs. dual-supply ADCs; meets industrial 5 V rail standards with ≤100 mW total dissipation. |
Applications
| Industrial Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: High-accuracy voltage monitoring of motor drive feedback loops and power supply outputs in programmable logic controller (PLC) backplanes. IC Role / Device Role / Timing Role: Primary 16-bit digitizer capturing ±10 V analog sensor signals at 200 kSPS with deterministic BUSY-synchronized read timing. Use Value: Delivers 85 dB S/(N+D) and ±2 LSB INL to resolve sub-millivolt changes in 12-bit-equivalent systems without post-processing correction. |
Use Scenario: Digitizing stimulus-response waveforms during production-line functional testing of analog front-end modules. IC Role / Device Role / Timing Role: Standalone ADC interfaced directly to FPGA-based pattern generator/analyzers via parallel bus with BYTE-controlled data packing. Use Value: Enables 5 µs throughput cycle and 40 ns aperture delay to capture fast transients while maintaining traceable metrology-grade linearity. |
| Scientific Instrumentation | Energy Metering Reference Design |
|
Use Scenario: Precision digitization of low-noise photodiode or strain gauge amplifier outputs in benchtop spectrometers and material analyzers. IC Role / Device Role / Timing Role: High-fidelity analog front-end digitizer using internal 2.5 V reference and separate AGND1/AGND2 grounding to suppress ground-loop artifacts. Use Value: Achieves 96 dB spurious-free dynamic range (SFDR) and –96 dB THD to resolve weak harmonics in spectral analysis applications. |
Use Scenario: Calibration-grade voltage channel in polyphase electricity meters requiring traceable accuracy per IEC 62053-22 Class 0.2. IC Role / Device Role / Timing Role: Metrology ADC operating with external precision reference and factory-trimmed gain/offset to meet long-term stability requirements. Use Value: Supports full-scale error drift ≤±2 ppm/°C and bipolar zero error ≤±10 mV - enabling <0.02% total error over 10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1 MSPS, SPI interface, no internal reference, 1.8 V supply only. | Requires external reference and level-shifting for 5 V systems; better for battery-powered portable instruments. | Select when higher speed and lower power are critical, and system already uses SPI infrastructure. |
| MAX11900ETJ+ | 16-bit, 500 kSPS, internal 2.5 V reference, 5 V supply, serial LVDS output. | LVDS interface reduces EMI in noisy environments but requires differential receiver; lacks BYTE pin flexibility. | Prefer for high-density PCBs where noise immunity outweighs parallel bus simplicity and cost. |
Compared with ADS8860IDRCT and MAX11900ETJ+, the AD976ABRZRL offers native 5 V parallel interfacing, integrated reference, and deterministic BUSY timing - making it optimal for legacy industrial controllers and FPGA-based systems where minimal firmware overhead and proven reliability are prioritized over raw speed or ultra-low power.
Availability
AD976ABRZRL is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, scientific instrumentation, and energy metering applications requiring stable component supply across extended product lifecycles.
Supply support for AD976ABRZRL 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 AD976ABRZRL belongs to Analog Devices' precision SAR ADC product line, engineered for metrology-grade accuracy, single-supply simplicity, and drop-in compatibility in legacy 5 V embedded systems demanding long-term reliability.
FAQ
What is the guaranteed integral nonlinearity (INL) specification for AD976ABRZRL?
The AD976ABRZRL is rated as a B-grade device with ±2 LSB maximum integral nonlinearity error over –40°C to +85°C, as specified in the AD976A B-Grade column of the official datasheet Rev. D. This corresponds to <0.003% full-scale error and ensures monotonic behavior across its entire 16-bit transfer function without missing codes.
Does AD976ABRZRL require an external reference, or does it include one internally?
The AD976ABRZRL includes a factory-calibrated internal 2.5 V reference (2.48 V to 2.52 V) that can be used directly - eliminating the need for external reference components. It also supports external reference inputs from 2.3 V to 2.7 V, but the internal reference is fully functional and optimized for the device's linearity and drift performance.
How is the analog input range configured for AD976ABRZRL?
The AD976ABRZRL has a fixed ±10 V analog input range when using the internal 2.5 V reference, as defined by its ±4×VREF architecture. No configuration pins or registers adjust this range; it is set by internal laser-trimmed resistors and remains stable across temperature and supply variations.
What package type and lead count does AD976ABRZRL use?
The AD976ABRZRL is supplied in a 28-lead small outline integrated circuit (SOIC) package, designated R-28 in Analog Devices' ordering guide. It measures 7.6 mm × 17.9 mm with 1.27 mm lead pitch and is RoHS-compliant with matte tin lead finish.
Can AD976ABRZRL operate with a 3.3 V digital supply instead of 5 V?
No - AD976ABRZRL requires both VANA and VDIG to be supplied with 4.75 V to 5.25 V. Its digital interface (VIH = +2.0 V to VDIG + 0.3 V, VOL = +0.4 V) and internal logic are designed exclusively for 5 V operation; applying 3.3 V will result in undefined behavior and failure to meet AC/DC specifications.
AD976ABRZRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD976ABRZRL FAQ
1.How can I place an order for AD976ABRZRL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD976ABRZRL 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 AD976ABRZRL reliable?
The price and inventory of AD976ABRZRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD976ABRZRL is usually 5 days.
3.What payment methods are accepted for AD976ABRZRL?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD976ABRZRL?
AD976ABRZRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD976ABRZRL 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 AD976ABRZRL?
For technical support, including AD976ABRZRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD976ABRZRL requirements.
6.How does Aetrix verify that AD976ABRZRL is sourced from the original manufacturer or authorized distributors?
All AD976ABRZRL 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 AD976ABRZRL meets industry standards.
7.What is the process for return or replacement of AD976ABRZRL?
All AD976ABRZRL units undergo pre-shipment inspection (PSI). If there is an issue with AD976ABRZRL, 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 AD976ABRZRL part is unused and in its original packaging.
Return procedure for AD976ABRZRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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