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Analog Devices Inc. AD976BRSZ
- Part No.:
- AD976BRSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD976BRSZ.pdf
- Description:
- IC ADC 16BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,651
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Product details
Overview
AD976BRSZ from Analog Devices is a 16-bit, 100 kSPS BiCMOS successive-approximation analog-to-digital converter (ADC) with ±10 V bipolar input range, internal 2.5 V reference, on-chip clock, and high-speed parallel interface. It operates from a single 5 V supply, dissipates ≤100 mW, and targets precision data acquisition in industrial instrumentation and test equipment.
For engineers reviewing the AD976BRSZ datasheet, AD976BRSZ pinout, AD976BRSZ application, or AD976BRSZ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in Analog Devices' official AD976/AD976A Rev. D documentation.
Technical Context
The AD976BRSZ uses a switched-capacitor SAR architecture with laser-trimmed scaling resistors and factory-stored calibration coefficients stored in thin-film ROM to correct capacitor mismatches and minimize INL/DNL errors. Its analog front-end features dual analog grounds (AGND1 for REF, AGND2 for CAP) and ±25 V overvoltage protection on VIN.
It supports two conversion control modes: R/C-triggered (CS tied low) or CS/R/C coordinated timing, with BUSY signaling conversion status and precise aperture delay (40 ns) and transient response (2 µs for full-scale step). Data output is binary twos complement, byte-selectable via the BYTE pin.
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 | 100 kSPS - enables sampling of signals up to 700 kHz full-power bandwidth |
| DC Accuracy (INL) | ±3 LSB max (B-grade) - ensures monotonicity and no missing codes across temperature |
| AC Performance (S/(N+D)) | 85 dB typical - corresponds to ~14.1 ENOB at 20 kHz input, suitable for high-fidelity measurement |
| Reference | Internal 2.5 V ±20 mV (2.48–2.52 V) - eliminates need for external reference unless higher stability required |
| Power Supply | Single 5 V (4.75–5.25 V); 100 mW max - simplifies power design and thermal management |
| Digital Interface | Parallel 16-bit, TTL/CMOS-compatible, BUSY-controlled read timing - interfaces directly with DSPs and microcontrollers without glue logic |
Pinout & Package
AD976BRSZ is packaged in a 28-lead Shrink Small Outline Package (SSOP), pin-compatible with AD976BR and AD976CR variants. The SSOP footprint (RS-28) offers compact layout and improved thermal performance vs. DIP/SOIC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog Input | ±10 V bipolar input node; requires 200 Ω series resistor and low-impedance drive for optimal linearity |
| REF | Reference I/O | Provides internal 2.5 V reference or accepts external 2.3–2.7 V reference; must be decoupled to AGND1 with 2.2 µF tantalum |
| CAP | Reference Buffer Output | Stabilizes internal reference; requires 2.2 µF tantalum capacitor to AGND2 |
| D15–D0 | Parallel Data Outputs | 16-bit binary twos complement result; high-impedance when CS HIGH or R/C LOW; BYTE pin swaps byte order |
| R/C | Read/Convert Control | Falling edge initiates conversion (with CS LOW); rising edge enables data output; defines sample-hold hold timing |
| CS | Chip Select | OR'd with R/C; falling edge triggers conversion or data enable depending on R/C state; disables outputs when HIGH |
| BUSY | Status Output | Active-low open-drain signal indicating conversion in progress; rising edge marks data validity |
| AGND1 / AGND2 / DGND | Analog & Digital Grounds | Separate low-current (AGND1) and high-current (AGND2) analog grounds reduce noise coupling; DGND isolated for digital return path |
Key Features
| Feature | Design Value |
|---|---|
| Factory-calibrated SAR architecture | Eliminates manual gain/offset trim in most applications; INL ≤ ±3 LSB and DNL ≤ +1.75/–2 LSB guaranteed |
| Integrated 2.5 V reference + on-chip clock | Reduces BOM count by two components; enables fully self-contained 16-bit ADC subsystem |
| Byte-selectable parallel interface | Supports 16-bit or dual 8-bit data reads via BYTE pin - simplifies interfacing with 8-bit microcontrollers |
| ±25 V input overvoltage protection | Prevents latch-up or damage during sensor disconnect, wiring faults, or ESD events in industrial environments |
| BiCMOS process technology | Combines high-speed bipolar devices for analog accuracy with CMOS logic for low-power digital interface |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous voltage/current monitoring of PLC analog I/O modules with ±10 V sensor inputs. IC Role / Device Role / Timing Role: Primary 16-bit ADC capturing slow-varying process variables at 100 kSPS with calibrated DC accuracy. Use Value: Delivers ±3 LSB INL and <±10 mV bipolar zero error - enabling sub-0.01% measurement repeatability without system-level calibration. |
Use Scenario: Digitizing stimulus-response waveforms in benchtop ATE systems requiring high dynamic range. IC Role / Device Role / Timing Role: High-fidelity acquisition stage feeding FPGA-based signal analysis with BUSY-synchronized data capture. Use Value: 85 dB S/(N+D) and –90 dB THD support >14-bit effective resolution for harmonic distortion analysis up to 700 kHz. |
| Medical Instrumentation | Energy Metering Reference Design |
|
Use Scenario: Isolated front-end digitization of ECG/EEG biopotential signals conditioned by precision op-amps. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC interfaced via opto-isolated BUSY and R/C lines to maintain patient safety isolation. Use Value: 40 ns aperture delay and 2 µs transient response ensure accurate capture of fast-rising physiological transients without droop or settling error. |
Use Scenario: Calibration-grade voltage channel in Class 0.2 polyphase energy meters using external shunt or CT sensing. IC Role / Device Role / Timing Role: Metrology-grade acquisition block referenced to stable external 2.5 V source for long-term drift compensation. Use Value: Full-scale error drift of ±7 ppm/°C and external reference support enable <±0.05% gain error stability over –40°C to +85°C operating range. |
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 |
|---|---|---|---|
| AD976BR | Same die, SOIC-28 package (R-28); 0.3 mm larger body, 1.27 mm lead pitch vs. SSOP's 0.65 mm | Preferred where board space allows and reflow compatibility with legacy SOIC footprints is needed | Select AD976BR if SSOP assembly infrastructure is unavailable or thermal dissipation requirements favor SOIC's lower θJA (72°C/W vs. 109°C/W) |
| AD976ARS | AD976A variant in same RS-28 SSOP package; 200 kSPS throughput, 83 dB S/(N+D), ±3 LSB INL | Suitable for higher-speed acquisition where 100 kSPS is insufficient but 16-bit resolution remains mandatory | Choose AD976ARS only if system requires ≥200 kSPS - note its higher power (100 mW still applies) and reduced AC performance vs. AD976BRSZ |
Compared with AD976BR, AD976BRSZ offers identical electrical specs in a smaller SSOP footprint ideal for space-constrained designs; compared with AD976ARS, it trades 100 kSPS speed for better AC accuracy (85 dB vs. 83 dB S/(N+D)) and tighter INL (±3 LSB vs. ±3 LSB, but B-grade vs. A-grade grading).
Availability
AD976BRSZ is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, medical instrumentation, and energy metering applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for AD976BRSZ 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 Wilmington, MA.
The AD976 product line delivers factory-calibrated, single-supply 16-bit SAR ADCs optimized for precision DC-critical and medium-bandwidth AC measurement in industrial, medical, and test systems.
FAQ
What is the maximum sampling rate supported by the AD976BRSZ?
The AD976BRSZ supports a maximum throughput rate of 100 kSPS, corresponding to a complete conversion cycle time of 10 µs. This is confirmed in the AD976–SPECIFICATIONS table under "THROUGHPUT SPEED" for all grades, and applies specifically to the AD976BRSZ as a B-grade AD976 variant in SSOP packaging.
Does the AD976BRSZ require an external reference voltage?
No, the AD976BRSZ includes an internal 2.5 V reference (2.48–2.52 V) that is fully functional and specified for linearity. An external reference (2.3–2.7 V) may be used to improve long-term stability or temperature drift, but it is not required for basic operation - the AD976BRSZ functions as a complete ADC solution out-of-the-box.
How is the AD976BRSZ pinout different from the AD976AN DIP version?
The AD976BRSZ uses the same 28-pin functional pinout as the AD976AN (DIP) and AD976AR (SOIC), per the "PIN CONFIGURATION" diagram and "PIN FUNCTION DESCRIPTIONS" table. All share identical signal assignments (e.g., Pin 1 = VIN, Pin 28 = VDIG), differing only in mechanical package dimensions and thermal characteristics - not electrical connectivity.
What does the BYTE pin do on the AD976BRSZ?
The BYTE pin on the AD976BRSZ controls data bus organization: when LOW, D15–D0 appear on pins 6–22 in standard order; when HIGH, the upper and lower bytes are swapped - D15–D8 output on pins 15–22 and D7–D0 on pins 6–13. This enables direct connection to 8-bit microcontrollers without external byte multiplexing logic.
Is the AD976BRSZ RoHS compliant and lead-free?
Yes, the AD976BRSZ is RoHS compliant and lead-free. Analog Devices' ordering guide and product change notifications confirm that all current-production RS-28 SSOP variants (including AD976BRS and AD976BRSZ) meet JEDEC J-STD-020 moisture sensitivity level 3 and RoHS Directive 2011/65/EU requirements.
AD976BRSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 100k
- 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-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD976BRSZ FAQ
1.How can I place an order for AD976BRSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD976BRSZ 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 AD976BRSZ reliable?
The price and inventory of AD976BRSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD976BRSZ is usually 5 days.
3.What payment methods are accepted for AD976BRSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD976BRSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD976BRSZ?
AD976BRSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD976BRSZ 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 AD976BRSZ?
For technical support, including AD976BRSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD976BRSZ requirements.
6.How does Aetrix verify that AD976BRSZ is sourced from the original manufacturer or authorized distributors?
All AD976BRSZ 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 AD976BRSZ meets industry standards.
7.What is the process for return or replacement of AD976BRSZ?
All AD976BRSZ units undergo pre-shipment inspection (PSI). If there is an issue with AD976BRSZ, 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 AD976BRSZ part is unused and in its original packaging.
Return procedure for AD976BRSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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