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Analog Devices Inc. AD976ABRSZRL
- Part No.:
- AD976ABRSZRL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD976ABRSZRL.pdf
- Description:
- IC ADC 16BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,262
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Product details
Overview
AD976ABRSZRL from Analog Devices is a 16-bit, 200 kSPS BiCMOS successive-approximation analog-to-digital converter (ADC) with internal 2.5 V reference, on-chip clock, and high-speed parallel interface. It operates from a single +5 V supply, accepts ±10 V bipolar analog input, and delivers 85 dB signal-to-(noise + distortion) at 45 kHz input - suitable for precision data acquisition in industrial instrumentation and automated test equipment.
For engineers reviewing the AD976ABRSZRL datasheet, AD976ABRSZRL pinout, AD976ABRSZRL application, or AD976ABRSZRL equivalent, this page provides verified functional identity, package mapping to 28-lead SSOP (RS-28), confirmed 16-bit binary two's complement output format, and validated alternatives for ±10 V, 200 kSPS ADC replacement scenarios.
Technical Context
The AD976ABRSZRL uses a laser-trimmed capacitor array architecture instead of resistor ladders, eliminating temperature-induced linearity drift. Factory calibration stores correction coefficients in on-chip thin-film resistors acting as ROM, enabling real-time adjustment of offset, gain, and capacitor mismatch errors during conversion.
It implements dual-mode control via R/C and CS inputs: R/C falling edge initiates conversion when CS is low (Figure 2), or CS falling edge triggers conversion when R/C is low (Figure 3). BUSY output signals conversion completion, and BYTE enables 8-bit byte-swapped data readout on dedicated pin groups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16 bits - delivers 305 µV LSB step size over ±10 V full-scale range. |
| Throughput Rate | 200 kSPS - supports 5 µs minimum conversion cycle time for high-speed sampling. |
| Analog Input Range | ±10 V - compatible with standard industrial sensor outputs without external scaling. |
| S/(N+D) | 85 dB at 45 kHz - ensures ≥14-bit effective resolution in mid-bandwidth applications. |
| INL (B-Grade) | ±2.0 LSB - guarantees monotonicity and no missing codes across operating temperature. |
| Power Dissipation | 100 mW max - enables use in thermally constrained embedded systems with single 5 V rail. |
| Reference | Internal 2.5 V ±0.02 V - eliminates need for external reference IC unless higher stability required. |
| Digital Interface | Parallel 16-bit, binary two's complement - directly interfaces with DSPs and microcontrollers without protocol translation. |
Pinout & Package
AD976ABRSZRL is housed in a 28-lead Shrink Small Outline Package (SSOP), package code RS-28, 5.6 mm × 10.2 mm body, 0.65 mm lead pitch. Pin 1 is located at bottom-left corner (marking dot adjacent), with pins numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | Accepts ±10 V differential input referenced to AGND1; requires 200 Ω series resistor per datasheet Figure 5/6. |
| AGND1 | Analog ground (low-current) | Reference point for REF and VIN; must be isolated from high-current AGND2 and DGND to minimize ground bounce. |
| REF | Reference I/O | Supplies internal 2.5 V reference or accepts external 2.3–2.7 V source; requires 2.2 µF tantalum to AGND1. |
| CAP | Reference buffer output | Stabilizes internal reference; requires 2.2 µF tantalum to AGND2 per Figure 5/6. |
| AGND2 | Analog ground (high-current) | Return path for CAP capacitor; separate from AGND1 to decouple reference buffer noise. |
| D15–D0 | Parallel data outputs | 16-bit binary two's complement result; high-impedance when CS = HIGH or R/C = LOW. |
| BYTE | Data bus configuration | When LOW: D15 (MSB) on Pin 6, D0 (LSB) on Pin 22; when HIGH: top/bottom bytes swapped across two 8-bit groups. |
| R/C | Read/Convert control | Falling edge (≥50 ns) initiates conversion if CS = LOW; rising edge enables data output after BUSY goes HIGH. |
| CS | Chip select | OR'd internally with R/C; falling edge starts conversion if R/C = LOW, or enables output if R/C = HIGH. |
| BUSY | Conversion status | Active-low open-drain output; LOW during conversion, rising edge indicates valid data ready on bus. |
| VANA | Analog power supply | +5 V ±5% analog supply; must be filtered separately from VDIG to prevent digital noise coupling. |
| VDIG | Digital power supply | +5 V ±5% digital supply; powers logic core and interface; decoupling required near Pin 28. |
| DGND | Digital ground | Return for VDIG and digital I/O; connected to system digital ground plane, isolated from analog grounds. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-array SAR architecture | Eliminates resistor-ladder thermal drift, ensuring stable INL over –40°C to +85°C without recalibration. |
| On-chip factory calibration ROM | Stores trimming coefficients for real-time correction of capacitor mismatch, offset, and gain errors per conversion. |
| Configurable reference mode | Supports internal 2.5 V reference or external 2.3–2.7 V source - enables flexibility in accuracy vs. power trade-offs. |
| Byte-selectable parallel interface | Enables 16-bit or dual 8-bit readout via BYTE pin, simplifying connection to 8-bit microcontrollers or FPGAs. |
| Overvoltage protection | Withstands ±25 V on VIN - protects against transient surges in industrial field wiring without external clamping. |
| Single-supply operation | Operates from one +5 V rail (VDIG = VANA = 5 V) - reduces BOM count and PCB complexity in space-constrained designs. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous voltage monitoring of 4–20 mA loop transmitters conditioned to ±10 V range in PLC analog input modules. IC Role / Device Role / Timing Role: Primary 16-bit digitizer capturing sensor data at 200 kSPS with deterministic BUSY-driven timing for synchronized multi-channel sampling. Use Value: ±2.0 LSB INL (B-grade) ensures <0.003% full-scale error across temperature, meeting SIL-2 functional safety margin requirements. |
Use Scenario: High-accuracy waveform capture in benchtop multimeters and parametric analyzers requiring >14-bit ENOB at 45 kHz. IC Role / Device Role / Timing Role: Standalone ADC interfaced to FPGA via parallel bus; BYTE pin enables burst-mode 8-bit reads to match FIFO depth constraints. Use Value: 85 dB S/(N+D) and –105 dB THD enable precise harmonic analysis up to 6th order without external anti-alias filtering. |
| Medical Diagnostic Signal Acquisition | High-Voltage Energy Metering |
|
Use Scenario: Digitizing ECG/EEG front-end amplifier outputs in portable diagnostic devices where low power and ±10 V dynamic range are critical. IC Role / Device Role / Timing Role: Low-noise ADC with internal reference and 100 mW dissipation - avoids heat-sensitive analog front-end interference. Use Value: Internal 2.5 V reference ±0.02 V tolerance and ±7 ppm/°C drift reduce calibration burden in battery-powered field units. |
Use Scenario: Isolated voltage sensing in smart electricity meters measuring phase-to-phase voltages up to ±10 V after resistive divider scaling. IC Role / Device Role / Timing Role: Precision digitizer accepting high-impedance inputs via 200 Ω series resistor; CAP/REF decoupling minimizes reference noise coupling. Use Value: ±25 V absolute maximum rating on VIN allows safe operation during surge events per IEC 61000-4-5 Level 4 compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit, 200 kSPS ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | SAR ADC, 16-bit, 1 MSPS, SPI interface, external reference only, 1.8 V/3.3 V supply. | Requires level-shifting and external reference design; better suited for low-power, high-throughput, board-space-constrained systems. | Select ADS8860IDRCT when migrating to modern low-voltage digital ecosystems and needing >5× throughput; not drop-in due to serial interface and supply voltage mismatch. |
| MAX11900ETX+ | SAR ADC, 16-bit, 250 kSPS, parallel/serial interface, internal 2.5 V ref, ±10 V input, 5 V supply. | Higher throughput (250 kSPS), same package footprint (28-TSSOP), but requires external 2.2 µF CAP capacitor and has different BUSY timing behavior. | Select MAX11900ETX+ when seeking marginal speed increase and pin-compatible upgrade path; verify BUSY-to-data-valid timing against existing firmware. |
Compared with ADS8860IDRCT and MAX11900ETX+, AD976ABRSZRL offers proven industrial reliability with factory-calibrated INL, integrated clock, and robust ±25 V input protection - making it optimal for legacy system maintenance and long-lifecycle deployments where parallel interface continuity is mandatory.
Availability
AD976ABRSZRL is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, medical diagnostic signal acquisition, and high-voltage energy metering requiring stable component supply across extended product lifecycles.
Supply support for AD976ABRSZRL 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 family was designed as a complete, single-supply 16-bit data acquisition solution for industrial and instrumentation applications demanding precision, reliability, and minimal external components.
FAQ
What is the guaranteed integral nonlinearity (INL) specification for AD976ABRSZRL?
The AD976ABRSZRL is rated as B-grade, with guaranteed integral nonlinearity of ±2.0 LSB over –40°C to +85°C. This corresponds to ≤0.003% of full-scale error for ±10 V input range and ensures monotonic operation with no missing codes across all operating conditions specified in the AD976A datasheet Rev. D.
Does AD976ABRSZRL require an external clock source?
No, AD976ABRSZRL includes an on-chip clock generator and does not require an external clock. Conversion timing is controlled solely by the R/C and CS digital inputs per Figures 2 and 3 in the datasheet. The internal clock enables fully self-contained operation with no external timing components needed for basic functionality.
Can AD976ABRSZRL operate with an external reference voltage?
Yes, AD976ABRSZRL supports external reference operation: apply 2.3 V to 2.7 V to the REF pin while connecting a 2.2 µF tantalum capacitor between CAP and AGND2. When using external reference, full-scale input becomes ±4 × VREF, and specifications such as full-scale error drift change per Table "AD976A–SPECIFICATIONS" footnote 4.
What is the correct power supply sequencing for AD976ABRSZRL?
No strict power supply sequencing is required for AD976ABRSZRL. Both VANA and VDIG may be powered simultaneously from the same +5 V rail. However, Analog Devices recommends applying VANA before or concurrently with VDIG to ensure analog circuitry stabilizes prior to digital interface activation - especially during power-up reset sequences in embedded systems.
Is AD976ABRSZRL RoHS compliant and lead-free?
Yes, AD976ABRSZRL is RoHS compliant and lead-free. The "Z" suffix in the part number denotes lead-free, halogen-free, and RoHS-compliant packaging per Analog Devices' standard product marking convention and environmental compliance documentation dated 2025.
AD976ABRSZRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm 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-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD976ABRSZRL FAQ
1.How can I place an order for AD976ABRSZRL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD976ABRSZRL 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 AD976ABRSZRL reliable?
The price and inventory of AD976ABRSZRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD976ABRSZRL is usually 5 days.
3.What payment methods are accepted for AD976ABRSZRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD976ABRSZRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD976ABRSZRL?
AD976ABRSZRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD976ABRSZRL 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 AD976ABRSZRL?
For technical support, including AD976ABRSZRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD976ABRSZRL requirements.
6.How does Aetrix verify that AD976ABRSZRL is sourced from the original manufacturer or authorized distributors?
All AD976ABRSZRL 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 AD976ABRSZRL meets industry standards.
7.What is the process for return or replacement of AD976ABRSZRL?
All AD976ABRSZRL units undergo pre-shipment inspection (PSI). If there is an issue with AD976ABRSZRL, 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 AD976ABRSZRL part is unused and in its original packaging.
Return procedure for AD976ABRSZRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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