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Analog Devices Inc. AD976ARZRL
- Part No.:
- AD976ARZRL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD976ARZRL.pdf
- Description:
- IC ADC 16BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:489
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Product details
Overview
AD976ARZRL from Analog Devices is a 16-bit, 100 kSPS BiCMOS analog-to-digital converter with ±10 V input range, internal 2.5 V reference, and parallel interface - designed for precision industrial data acquisition systems requiring high linearity and single-supply operation.
For engineers reviewing the AD976ARZRL datasheet, AD976ARZRL pinout, AD976ARZRL application, or AD976ARZRL equivalent, this page delivers verified specifications, package mapping, real-world use cases, and validated alternative options - all grounded in Analog Devices' official AD976/AD976A Rev. D documentation.
Technical Context
The AD976ARZRL implements a successive-approximation architecture using a laser-trimmed capacitor array instead of resistor ladders, eliminating temperature-induced linearity drift. It integrates factory-calibrated offset/gain correction coefficients stored in on-chip thin-film resistors.
It operates from a single 5 V supply (VANA = VDIG = 5 V), supports both internal and external 2.5 V reference modes, and features a high-speed parallel interface with BYTE-selectable 16-bit or dual-8-bit output formatting - all synchronized via R/C and CS control 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 | 100 kSPS - enables sampling of signals up to 700 kHz full-power bandwidth |
| Input Range | ±10 V bipolar - compatible with standard industrial sensor outputs without signal conditioning |
| S/(N+D) | 83 dB typical - corresponds to ~13.8 effective number of bits (ENOB) at 20 kHz input |
| INL Error | ±3 LSB max (A-grade) - ensures monotonicity and <0.005% integral nonlinearity |
| Power Dissipation | 100 mW max - enables thermally constrained embedded designs with single 5 V rail |
| Reference | Internal 2.5 V ±20 mV - eliminates need for external reference IC in cost-sensitive applications |
Pinout & Package
AD976ARZRL is housed in a 28-lead SOIC package (R-28), 300 mil width, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog Input | ±10 V differential-capable input node; requires 200 Ω series resistor per datasheet Figure 5 |
| REF | Reference I/O | Provides internal 2.5 V reference or accepts external 2.3–2.7 V source; must be decoupled to AGND1 |
| CAP | Reference Buffer Output | Stabilizes internal reference; requires 2.2 µF tantalum capacitor to AGND2 |
| D15–D0 | Parallel Data Outputs | 16-bit binary two's complement output bus; high-impedance when CS HIGH or R/C LOW |
| BYTE | Data Format Control | Selects full 16-bit (BYTE LOW) or split 8-bit byte mode (BYTE HIGH) for microcontroller interfacing |
| R/C | Read/Convert Trigger | Falling edge initiates conversion; rising edge enables data output - used with CS for timing flexibility |
| CS | Chip Select | Active-low enable; OR'd internally with R/C to control conversion start and data latch timing |
| BUSY | Status Indicator | Active-low open-drain signal indicating conversion in progress; rising edge marks data validity |
| VANA / VDIG | Analog/Digital Supplies | Separate 4.75–5.25 V rails minimize digital noise coupling into analog section |
| AGND1 / AGND2 / DGND | Ground Terminals | AGND1 references REF; AGND2 references CAP; DGND isolated to reduce ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| On-chip capacitor array ADC | Eliminates resistor ladder mismatch drift - maintains INL stability across –40°C to +85°C |
| Factory calibration ROM | Stores trimming coefficients for offset, gain, and capacitor mismatch - no user calibration required |
| Single 5 V supply operation | Reduces BOM count and layout complexity vs. dual-rail ADCs; 100 mW dissipation enables fanless enclosures |
| Parallel interface with BYTE control | Supports both 16-bit DSP/microcontroller buses and 8-bit legacy controllers without glue logic |
| ±25 V input overvoltage protection | Withstands transient surges common in industrial field wiring - reduces need for external TVS networks |
Applications
| Industrial Process Monitoring | Test & Measurement Equipment |
|---|---|
Use Scenario: Continuous logging of pressure, temperature, and flow sensor outputs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary digitizer for ±10 V analog sensor channels; synchronized to system clock via R/C pulses. Use Value: 16-bit resolution captures sub-millivolt changes in calibrated transducers; internal reference ensures repeatability across units without calibration drift. |
Use Scenario: Digitizing waveform outputs from function generators and signal analyzers during bench validation. IC Role / Device Role / Timing Role: High-fidelity front-end ADC in automated test equipment; interfaces directly to FPGA-controlled data capture logic. Use Value: 83 dB S/(N+D) and 90 dB SFDR support accurate harmonic analysis up to 700 kHz; BUSY-driven latching guarantees sample alignment. |
| Medical Instrumentation | Energy Metering Systems |
Use Scenario: ECG and EEG signal acquisition in portable diagnostic devices where size and power are constrained. IC Role / Device Role / Timing Role: Precision analog front-end digitizer; powered from single 5 V battery-derived rail with minimal external components. Use Value: Single-supply operation and integrated reference reduce component count; ±10 V range accommodates amplified bio-potential signals without level-shifting. |
Use Scenario: Voltage and current sampling in Class 0.2 polyphase electricity meters compliant with IEC 62053-22. IC Role / Device Role / Timing Role: High-accuracy metrology ADC capturing voltage transformer and current shunt outputs simultaneously. Use Value: ±3 LSB INL and low power supply sensitivity (<±8 LSB over ±5% VDD variation) ensure metering accuracy across line voltage fluctuations. |
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 SOIC-28 package; lacks internal reference and BYTE pin | Lower resolution suits cost-sensitive applications where 14-bit ENOB suffices | Choose when resolution budget allows trade-off for lower cost and simpler interface |
| ADS8688IPWR | 16-bit, 500 kSPS, SPI interface, integrated PGA and reference; TSSOP-38 package | Higher speed and programmable gain ideal for multi-channel sensor hubs with variable signal ranges | Prefer when system requires >100 kSPS or needs on-chip signal conditioning and serial interface |
Compared with AD976ARZRL, AD974ARZ offers reduced resolution and no internal reference but lower unit cost, while ADS8688IPWR provides higher throughput and integrated signal chain functions at the expense of parallel interface compatibility and larger footprint.
Availability
AD976ARZRL is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, medical instrumentation, and energy metering systems requiring stable component supply and long-term obsolescence management.
Supply support for AD976ARZRL 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/AD976A product line was engineered for high-accuracy, single-supply data acquisition in industrial and instrumentation applications - emphasizing factory-calibrated linearity, robust input protection, and minimal external component count.
FAQ
What is the maximum sampling rate supported by the AD976ARZRL?
The AD976ARZRL 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" and applies to all grade variants (A/B/C) of the AD976 part number family. The AD976ARZRL is the SOIC-packaged version of the AD976, not the faster AD976A variant.
Does the AD976ARZRL require an external reference voltage?
No - the AD976ARZRL includes an internal 2.5 V reference (2.48 V to 2.52 V) that can be used directly. An external reference between 2.3 V and 2.7 V may optionally replace it, but is not required. The REF pin serves as both output (internal mode) and input (external mode), and must be decoupled with a 2.2 µF tantalum capacitor to AGND1 per the functional description and pin configuration diagrams.
What package type is used for the AD976ARZRL?
The AD976ARZRL uses a 28-lead Small Outline Integrated Circuit (SOIC) package, designated R-28 in the Ordering Guide. It is a 300-mil wide, gull-wing surface-mount package compliant with JEDEC MS-012AC, distinct from the PDIP (N-28B) and SSOP (RS-28) variants offered in the same AD976 family.
How does the BYTE pin affect data output on the AD976ARZRL?
The BYTE pin on the AD976ARZRL selects between two data output formats: when BYTE is LOW, D15 (MSB) appears on Pin 6 and D0 (LSB) on Pin 22 for full 16-bit parallel access; when BYTE is HIGH, Pins 6–13 output D7–D0 (low byte) and Pins 15–22 output D15–D8 (high byte). This enables flexible interfacing with both 16-bit and 8-bit microcontrollers without external multiplexing.
What is the guaranteed integral nonlinearity (INL) specification for the AD976ARZRL?
The AD976ARZRL - as an AD976 (not AD976A) device - has a maximum integral nonlinearity error of ±3 LSB for A-grade, ±2 LSB for B-grade, and ±3 LSB for C-grade, as specified in the AD976–SPECIFICATIONS table. With a ±10 V input range, 1 LSB equals 305 µV, so ±3 LSB corresponds to ±915 µV absolute linearity error across the full scale.
AD976ARZRL 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):
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD976ARZRL FAQ
1.How can I place an order for AD976ARZRL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD976ARZRL 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 AD976ARZRL reliable?
The price and inventory of AD976ARZRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD976ARZRL is usually 5 days.
3.What payment methods are accepted for AD976ARZRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD976ARZRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD976ARZRL?
AD976ARZRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD976ARZRL 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 AD976ARZRL?
For technical support, including AD976ARZRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD976ARZRL requirements.
6.How does Aetrix verify that AD976ARZRL is sourced from the original manufacturer or authorized distributors?
All AD976ARZRL 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 AD976ARZRL meets industry standards.
7.What is the process for return or replacement of AD976ARZRL?
All AD976ARZRL units undergo pre-shipment inspection (PSI). If there is an issue with AD976ARZRL, 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 AD976ARZRL part is unused and in its original packaging.
Return procedure for AD976ARZRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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