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Analog Devices Inc. AD976ARSRL
- Part No.:
- AD976ARSRL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD976ARSRL.pdf
- Description:
- IC ADC 16BIT 100KSPS 28-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,472
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Product details
Overview
AD976ARSRL 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 automated test equipment.
For engineers reviewing the AD976ARSRL datasheet, AD976ARSRL pinout, AD976ARSRL application, or AD976ARSRL equivalent, this page delivers verified technical context, exact package mapping (28-lead SSOP), confirmed pin functions, real-world use cases, and two validated alternative parts - all grounded in Analog Devices' official REV. D specification.
Technical Context
The AD976ARSRL implements a switched-capacitor SAR architecture with laser-trimmed scaling resistors and factory-calibrated thin-film resistor ROM for offset/linearity correction. Its analog front-end features dual analog grounds (AGND1 for REF, AGND2 for CAP), ±25 V overvoltage protection, and 22 pF input capacitance with 23 kΩ input impedance.
Conversion is controlled via R/C and CS signals with BUSY-driven timing; it supports both full-parallel (16-bit D0–D15) and byte-mode (BYTE-selectable high/low byte) output. The device uses binary two's complement coding and includes an integrated 2.5 V reference with 1 µA source current and ±7 ppm/°C drift.
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 | 100 kSPS - fixed conversion time of 10 µs enables deterministic sampling in closed-loop control |
| Analog Input Range | ±10 V - standard industrial bipolar range, supported by internal reference or external 2.3–2.7 V source |
| Integral Linearity Error | ±3 LSB (max, A-grade) - ensures monotonicity and <15-bit effective linearity without post-calibration |
| Power Dissipation | 100 mW max - enables operation in thermally constrained embedded systems without forced cooling |
| Reference Voltage | 2.5 V ±20 mV (internal) - stable, low-drift reference eliminates need for external precision voltage source |
| Full-Power Bandwidth | 700 kHz - supports accurate digitization of signals up to 10-bit ENOB at full scale |
Pinout & Package
AD976ARSRL is packaged in a 28-lead Shrink Small Outline Package (SSOP), designated RS-28 per Analog Devices' Ordering Guide. This surface-mount package measures 10.2 mm × 5.3 mm with 0.65 mm lead pitch and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | Accepts ±10 V bipolar signal; requires 200 Ω series resistor for optimal linearity and overvoltage protection |
| 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 capacitor to AGND2 |
| D0–D15 | Parallel data outputs | 16-bit binary two's complement result; high-impedance when CS = HIGH or R/C = LOW |
| BYTE | Data bus configuration | Selects full-parallel (BYTE = LOW) or split-byte mode (BYTE = HIGH) for 8-bit microcontroller interfacing |
| R/C | Read/Convert control | Falling edge initiates conversion; rising edge enables data output - enables synchronous sampling with external logic |
| CS | Chip select | OR'd with R/C; falling edge triggers conversion or data enable depending on R/C state |
| BUSY | Status indicator | Active-low open-drain signal indicating conversion in progress; rising edge marks data validity |
| VANA / VDIG | Analog/digital supplies | Separate +5 V rails minimize digital noise coupling into analog section; each regulated to ±5% tolerance |
| AGND1 / AGND2 / DGND | Ground terminals | AGND1 references REF; AGND2 references CAP; star grounding required to maintain 83 dB S/(N+D) |
Key Features
| Feature | Design Value |
|---|---|
| Factory-calibrated SAR core | Eliminates need for system-level linearity calibration; INL ≤ ±3 LSB guaranteed across –40°C to +85°C |
| Integrated 2.5 V reference | Reduces BOM count and layout area; ±7 ppm/°C drift ensures stable full-scale accuracy over temperature |
| On-chip clock generator | Removes external oscillator requirement; enables self-contained operation with only power and signal connections |
| Byte-selectable parallel interface | Supports both 16-bit DSPs and 8-bit microcontrollers without glue logic or data latching |
| ±25 V input overvoltage protection | Withstands transient surges common in industrial field wiring without external clamping diodes |
Applications
| Industrial Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: High-accuracy voltage monitoring in PLC analog input modules with ±10 V sensor interfaces. IC Role / Device Role / Timing Role: Primary ADC capturing slow-varying process variables (temperature, pressure) at 100 kSPS with DC-coupled precision. Use Value: 16-bit resolution and ±3 LSB INL ensure sub-0.01% measurement repeatability across temperature without recalibration. |
Use Scenario: Digitizing stimulus response waveforms during functional testing of analog circuit boards. IC Role / Device Role / Timing Role: Standalone sampling node synchronized to ATE master clock via R/C and BUSY handshake. Use Value: Internal reference and on-chip clock eliminate timing jitter sources, enabling repeatable THD < –90 dB measurements. |
| Scientific Instrumentation | Power Quality Monitoring |
Use Scenario: Low-noise signal capture in benchtop oscilloscopes and spectrum analyzers requiring >80 dB SFDR. IC Role / Device Role / Timing Role: Front-end ADC for medium-bandwidth acquisition channels with programmable gain amplifier interface. Use Value: 83 dB S/(N+D) at 100 kHz and 700 kHz full-power bandwidth support accurate FFT-based spectral analysis. |
Use Scenario: Harmonic distortion analysis in three-phase energy meters measuring grid voltage/current waveforms. IC Role / Device Role / Timing Role: Bipolar-input ADC digitizing conditioned AC line signals referenced to system ground. Use Value: ±10 V input range and bipolar zero error < ±15 mV enable precise zero-crossing detection and RMS calculation. |
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 |
|---|---|---|---|
| AD974ARZ | 14-bit, 100 kSPS, same SSOP-28 package, no internal reference, requires external 2.5 V source | Lacks integrated reference and bipolar input optimization; suited for unipolar or cost-sensitive designs | Choose AD974ARZ only if 14-bit resolution suffices and external reference infrastructure already exists. |
| ADS8860IPWR | 16-bit, 1 MSPS, SPI interface, 1.8 V supply, no internal reference, 10-pin WSON package | Higher speed but serial interface increases MCU overhead; lacks ±10 V input and industrial temperature grade | Prefer ADS8860IPWR for portable, low-power, high-throughput applications where space and supply voltage constrain design. |
Compared with AD976ARSRL, AD974ARZ trades 2 bits of resolution and reference integration for lower cost and power, while ADS8860IPWR offers 10× throughput at the expense of analog input flexibility, packaging compatibility, and industrial-grade specifications.
Availability
AD976ARSRL is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, scientific instrumentation, and power quality monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD976ARSRL 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 specifically for high-accuracy, medium-speed data acquisition in industrial and instrumentation systems where ±10 V bipolar input, single-supply operation, and minimal external components are critical.
FAQ
What is the maximum sampling rate supported by the AD976ARSRL?
The AD976ARSRL supports a maximum throughput rate of 100 kSPS, corresponding to a minimum conversion time of 10 µs. This is fixed by its SAR architecture and internal timing - unlike the faster AD976A variant (200 kSPS), the AD976ARSRL is rated exclusively for 100 kSPS operation per Analog Devices' REV. D specification and Ordering Guide.
Does the AD976ARSRL require an external reference voltage?
No, the AD976ARSRL includes a factory-trimmed internal 2.5 V reference with ±20 mV tolerance and ±7 ppm/°C drift, fully specified for operation across –40°C to +85°C. An external reference (2.3–2.7 V) may be used via the REF pin to improve accuracy or accommodate non-standard full-scale ranges, but it is not required for basic ±10 V operation.
What package type is used for the AD976ARSRL?
The AD976ARSRL is supplied in a 28-lead Shrink Small Outline Package (SSOP), identified as RS-28 in Analog Devices' Ordering Guide. Its dimensions are 10.2 mm × 5.3 mm with 0.65 mm lead pitch, and it is compatible with standard surface-mount reflow processes.
How does the BYTE pin affect data output on the AD976ARSRL?
When BYTE = LOW, the AD976ARSRL outputs the full 16-bit result in standard order: D15 (MSB) on Pin 6, D0 (LSB) on Pin 22. When BYTE = HIGH, the byte order swaps: D15–D8 appear on Pins 15–22, and D7–D0 appear on Pins 6–13 - enabling direct connection to 8-bit microcontrollers without external multiplexing.
What is the purpose of the CAP pin on the AD976ARSRL?
The CAP pin is the output of the internal reference buffer and must be decoupled to AGND2 using a 2.2 µF tantalum capacitor. This capacitor stabilizes the reference voltage during conversion cycles and is essential for achieving specified linearity (±3 LSB INL) and noise performance (83 dB S/(N+D)). Omitting it degrades accuracy and increases code transition noise.
AD976ARSRL 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:
- -
AD976ARSRL FAQ
1.How can I place an order for AD976ARSRL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD976ARSRL 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 AD976ARSRL reliable?
The price and inventory of AD976ARSRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD976ARSRL is usually 5 days.
3.What payment methods are accepted for AD976ARSRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD976ARSRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD976ARSRL?
AD976ARSRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD976ARSRL 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 AD976ARSRL?
For technical support, including AD976ARSRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD976ARSRL requirements.
6.How does Aetrix verify that AD976ARSRL is sourced from the original manufacturer or authorized distributors?
All AD976ARSRL 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 AD976ARSRL meets industry standards.
7.What is the process for return or replacement of AD976ARSRL?
All AD976ARSRL units undergo pre-shipment inspection (PSI). If there is an issue with AD976ARSRL, 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 AD976ARSRL part is unused and in its original packaging.
Return procedure for AD976ARSRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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