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Analog Devices Inc. AD976AARSRL
- Part No.:
- AD976AARSRL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD976AARSRL.pdf
- Description:
- IC ADC 16BIT 200KSPS 28-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,842
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Product details
Overview
AD976AARSRL 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 input range, and parallel 16-bit twos-complement interface - designed for high-accuracy data acquisition in industrial instrumentation and test equipment.
For engineers reviewing the AD976AARSRL datasheet, AD976AARSRL pinout, AD976AARSRL application, or AD976AARSRL equivalent, this page delivers verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for precision ADC selection in single-supply 5 V systems.
Technical Context
The AD976AARSRL implements a switched-capacitor SAR architecture with on-chip laser-trimmed capacitor array calibration, eliminating external sample-and-hold circuitry and minimizing temperature-dependent linearity drift. It integrates an internal 2.5 V reference and on-chip clock generator.
Control logic supports dual-mode operation: R/C-triggered conversion with CS held low, or CS-gated read/conversion timing. The BYTE pin enables flexible 16-bit parallel or byte-swapped 8+8-bit data output routing to microcontrollers or DSPs.
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 5 µs minimum conversion cycle time for real-time control loops |
| S/(N+D) | 83 dB typical at 45 kHz input - corresponds to ~14-bit effective resolution in dynamic signal capture |
| INL | ±3 LSB max (A-grade) - ensures monotonicity and <0.005% full-scale linearity error |
| Power Dissipation | 100 mW max at 5 V - supports thermally constrained embedded designs without forced cooling |
| Analog Input Range | ±10 V - matches standard industrial sensor and transducer outputs without external scaling |
| Reference | Internal 2.5 V ±20 mV - eliminates need for external reference IC in cost-sensitive applications |
Pinout & Package
AD976AARSRL is packaged in a 28-lead Shrink Small Outline Package (SSOP), pin-compatible with AD976AAR (SOIC) and AD976AAN (PDIP), with 0.65 mm lead pitch and exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | ±10 V bipolar input node; requires 200 Ω series resistor per datasheet for optimal linearity |
| REF | Reference I/O | Supplies or accepts 2.5 V reference; must be decoupled to AGND1 with 2.2 µF tantalum |
| CAP | Reference buffer output | Stabilizes internal reference; requires 2.2 µF tantalum to AGND2 |
| D15–D0 | Parallel data outputs | 16-bit twos-complement result; high-impedance when CS = HIGH or R/C = LOW |
| R/C | Read/Convert control | Falling edge initiates conversion; rising edge enables data output (with CS = LOW) |
| CS | Chip select | OR'd with R/C; falling edge triggers conversion or data enable depending on R/C state |
| BUSY | Status output | Active-low open-drain signal indicating conversion in progress; rising edge latches valid data |
| BYTE | Data format selector | LOW = D15–D0 on pins 6–22; HIGH = D15–D8 on pins 15–22, D7–D0 on pins 6–13 |
| VANA / VDIG | Analog/digital supplies | Separate 5 V rails minimize digital noise coupling into analog section |
| AGND1 / AGND2 / DGND | Ground terminals | AGND1 references REF; AGND2 references CAP; DGND isolates digital return path |
Key Features
| Feature | Design Value |
|---|---|
| On-chip capacitor array calibration | Factory-trimmed coefficients stored in thin-film ROM correct capacitor mismatch, ensuring ±3 LSB INL without user calibration |
| Integrated 2.5 V reference | Eliminates external reference IC and associated layout complexity while maintaining ±0.5% full-scale accuracy |
| Single 5 V supply operation | Reduces system BOM count and simplifies power design versus dual-supply 16-bit ADCs |
| High-speed parallel interface | 83 ns bus access time enables direct connection to 8051, ARM Cortex-M, or TI C2000 microcontrollers without glue logic |
| Overvoltage protection | ±25 V absolute max rating on VIN protects against transient surges in industrial environments |
Applications
| Industrial Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: High-precision voltage monitoring of PLC analog I/O modules under varying temperature and EMI conditions. IC Role / Device Role / Timing Role: Primary 16-bit sampling ADC capturing ±10 V sensor outputs at 200 kSPS for real-time diagnostics. Use Value: ±3 LSB INL and 83 dB S/(N+D) ensure measurement repeatability within 0.005% full-scale across –40°C to +85°C. |
Use Scenario: Digitizing stimulus response waveforms in benchtop multimeters and parametric analyzers. IC Role / Device Role / Timing Role: Core acquisition engine synchronized to system clock via R/C input for deterministic sampling intervals. Use Value: Internal reference and calibrated capacitor array eliminate gain drift errors during extended calibration cycles. |
| Medical Instrumentation | Energy Metering Reference Design |
|
Use Scenario: Isolated front-end digitization of ECG/EEG biopotential signals conditioned by low-noise instrumentation amplifiers. IC Role / Device Role / Timing Role: Final-stage ADC after analog filtering; operates with external 2.5 V reference for enhanced channel matching. Use Value: 22 pF input capacitance and 13 kΩ impedance allow stable interface with op-amp drivers without phase margin loss. |
Use Scenario: High-accuracy voltage channel in Class 0.2 polyphase energy meters compliant with IEC 62053-22. IC Role / Device Role / Timing Role: Precision voltage sampling element referenced to metrology-grade external reference. Use Value: Bipolar zero error ≤ ±10 mV and full-scale error drift ≤ ±2 ppm/°C support long-term meter calibration stability. |
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, external reference only, no internal clock | Requires external clock and reference; better suited for space-constrained PCBs with existing SPI infrastructure | Select when higher throughput and serial interface reduce MCU pin count, accepting added reference/clock design effort |
| MAX11902ETX+ | 16-bit, 500 kSPS, internal reference ±0.5%, differential input, 3.3 V supply | Supports true differential inputs and lower supply voltage; lacks BYTE pin flexibility and ±10 V range | Prefer for battery-powered or differential-sensor applications where 5 V operation and bipolar ±10 V range are not required |
Compared with ADS8860IDRCT and MAX11902ETX+, the AD976AARSRL uniquely combines 200 kSPS parallel throughput, ±10 V input, internal reference, and BYTE-configurable data output in a single 28-pin SSOP - making it optimal for legacy 5 V industrial controllers needing drop-in 16-bit ADC upgrades.
Availability
AD976AARSRL is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, and medical instrumentation requiring stable component supply and long-lifecycle support.
Supply support for AD976AARSRL 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 AD976AARSRL belongs to Analog Devices' precision SAR ADC product line, engineered for high DC accuracy and dynamic performance in single-supply 5 V data acquisition systems demanding ±10 V input compatibility and minimal external components.
FAQ
What is the maximum sampling rate supported by the AD976AARSRL?
The AD976AARSRL supports a maximum throughput rate of 200 kSPS, corresponding to a minimum conversion cycle time of 5 µs. This is confirmed in the AD976A specifications table under "Throughput Rate" and applies across all grade versions (A/B/C) when operating with internal reference and VANA = VDIG = +5 V. The AD976AARSRL achieves this using its on-chip clock and optimized SAR architecture without requiring external timing components.
Does the AD976AARSRL require an external reference, or does it include an internal one?
The AD976AARSRL includes a factory-calibrated internal 2.5 V reference (2.48 V to 2.52 V, ±0.8% tolerance), eliminating the need for an external reference in most applications. It also supports external reference operation down to 2.3 V and up to 2.7 V for improved accuracy or system-level reference sharing. The REF pin serves as both output (internal mode) and input (external mode), with mandatory 2.2 µF decoupling to AGND1.
How is the AD976AARSRL's 16-bit parallel data output configured for microcontroller interfacing?
The AD976AARSRL provides 16-bit twos-complement data via D15–D0 pins, with configurable byte ordering controlled by the BYTE pin. When BYTE = LOW, D15 (MSB) appears on Pin 6 and D0 (LSB) on Pin 22. When BYTE = HIGH, D15–D8 appear on Pins 15–22 and D7–D0 on Pins 6–13 - enabling efficient 8-bit bus access on 8-bit MCUs. Data becomes valid on the rising edge of BUSY, with 83 ns bus access time specified.
What package type is used for the AD976AARSRL, and how does it differ from AD976AAR?
The AD976AARSRL uses a 28-lead Shrink Small Outline Package (SSOP, RS-28), measuring 10.2 mm × 5.3 mm with 0.65 mm lead pitch. It is pin-identical to the SOIC-packaged AD976AAR (R-28) but offers 35% smaller footprint and improved thermal resistance (θJA = 109°C/W). Both share identical electrical specifications, timing, and pin functions - allowing direct replacement where board space is constrained.
Can the AD976AARSRL operate with a 3.3 V digital supply instead of 5 V?
No - the AD976AARSRL requires separate 5 V analog (VANA) and digital (VDIG) supplies, each regulated between 4.75 V and 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 CMOS/TTL compatibility. Operating VDIG below 4.75 V violates absolute maximum ratings and causes undefined behavior, including BUSY timing violations and data corruption.
AD976AARSRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- Parallel
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD976AARSRL FAQ
1.How can I place an order for AD976AARSRL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD976AARSRL 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 AD976AARSRL reliable?
The price and inventory of AD976AARSRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD976AARSRL is usually 5 days.
3.What payment methods are accepted for AD976AARSRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD976AARSRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD976AARSRL?
AD976AARSRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD976AARSRL 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 AD976AARSRL?
For technical support, including AD976AARSRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD976AARSRL requirements.
6.How does Aetrix verify that AD976AARSRL is sourced from the original manufacturer or authorized distributors?
All AD976AARSRL 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 AD976AARSRL meets industry standards.
7.What is the process for return or replacement of AD976AARSRL?
All AD976AARSRL units undergo pre-shipment inspection (PSI). If there is an issue with AD976AARSRL, 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 AD976AARSRL part is unused and in its original packaging.
Return procedure for AD976AARSRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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