My Inquiry
My Account
Analog Devices Inc. AD976ARSZ
- Part No.:
- AD976ARSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD976ARSZ.pdf
- Description:
- IC ADC 16BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,785
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD976ARSZ from Analog Devices is a 16-bit, 100 kSPS successive-approximation analog-to-digital converter (ADC) fabricated in BiCMOS, operating from a single +5 V supply with ±10 V analog input range, internal 2.5 V reference, and parallel 16-bit twos-complement interface - used in precision data acquisition systems for industrial instrumentation and test equipment.
For engineers reviewing the AD976ARSZ datasheet, AD976ARSZ pinout, AD976ARSZ application, or AD976ARSZ equivalent, this page delivers verified technical context, package-validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional and parametric distinctions.
Technical Context
The AD976ARSZ implements a switched-capacitor SAR architecture with on-chip laser-trimmed capacitor array calibration, eliminating external sample-and-hold circuitry and minimizing temperature-induced linearity drift. It integrates an internal 2.5 V reference (±20 mV tolerance), on-chip clock, and high-speed parallel interface with BYTE-selectable 8-bit/16-bit data output mode.
Conversion is controlled via R/C and CS inputs, supporting both autonomous (CS tied low) and synchronized (CS edge-triggered) timing modes. BUSY output signals conversion completion, with aperture delay fixed at 40 ns and full-scale transient response of 2 µs - enabling deterministic sampling in closed-loop control and waveform digitization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 305 µV LSB step size over ±10 V input range, enabling sub-millivolt measurement fidelity. |
| Throughput Rate | 100 kSPS - supports real-time capture of signals up to 700 kHz full-power bandwidth with 83 dB S/(N+D). |
| Analog Input Range | ±10 V - industry-standard bipolar range, compatible with sensor outputs and industrial signal conditioning stages. |
| Reference | Internal 2.5 V ±20 mV - eliminates need for external reference IC; external reference support (2.3–2.7 V) enables system-level voltage scaling. |
| Power Dissipation | 100 mW max - enables operation in thermally constrained embedded systems without forced cooling. |
| Digital Interface | Parallel 16-bit twos-complement - direct connection to DSP/microcontroller data buses; BYTE pin enables 8-bit nibble reads for resource-limited hosts. |
| INL / DNL | ±3 LSB / –2 to +3 LSB - guarantees no missing codes and ≤15-bit effective linearity across –40°C to +85°C. |
Pinout & Package
AD976ARSZ is housed in a 28-lead Shrink Small Outline Package (SSOP, RW-28 footprint), 5.6 mm × 13.9 mm body, 0.65 mm lead pitch, gull-wing leads. Thermal resistance θJA = 109°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | ±10 V bipolar input node; requires 200 Ω series resistor and low-impedance drive to meet INL spec. |
| REF | Reference I/O | Provides internal 2.5 V reference; accepts external 2.3–2.7 V reference to override factory setting. |
| CAP | Reference buffer output | Stabilizes REF with 2.2 µF tantalum capacitor to AGND2; critical for noise-sensitive conversions. |
| D15–D0 | Parallel data outputs | 16-bit twos-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: swaps byte order for 8-bit microcontrollers. |
| R/C | Read/Convert control | Falling edge initiates conversion; rising edge enables data output - primary timing trigger in CS-tied-low mode. |
| CS | Chip select | OR'd with R/C; falling edge triggers conversion or latches data depending on R/C state - enables synchronous read timing. |
| BUSY | Conversion status | Active-low open-drain output; goes HIGH 50 ns before data valid - used as latch strobe for external registers. |
| VANA / VDIG | Analog/digital supplies | Separate +5 V rails (4.75–5.25 V); must be decoupled independently to prevent digital noise coupling into analog path. |
| AGND1 / AGND2 / DGND | Ground terminals | AGND1 references REF; AGND2 references CAP; DGND isolated - star grounding required for <85 dB SNR. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-calibrated SAR core | On-chip ROM-stored calibration coefficients correct capacitor mismatch errors, ensuring ±3 LSB INL without user trimming. |
| Integrated reference & clock | Eliminates two external components (ref IC + crystal oscillator), reducing BOM count and PCB area in compact DAQ modules. |
| Overvoltage protection | ±25 V absolute max on VIN enables robust front-end design without clamping diodes in industrial environments. |
| Byte-selectable interface | Supports both 16-bit wide data buses and legacy 8-bit microcontrollers via pin-strapped nibble sequencing - extends design reuse. |
| Low power, single-supply | 100 mW at 5 V allows integration into battery-backed or energy-constrained monitoring nodes without thermal derating. |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous logging of pressure, temperature, and flow sensor outputs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC capturing 100 kSPS sensor waveforms with ±10 V range compatibility and 83 dB S/(N+D) for harmonic analysis. Use Value: Enables detection of sub-0.1% amplitude deviations in 50/60 Hz mains-synchronized measurements without external gain staging. |
Use Scenario: Digitizing stimulus-response waveforms during semiconductor device characterization at production test stations. IC Role / Device Role / Timing Role: High-fidelity acquisition engine synchronized to pattern generator clocks via R/C and BUSY handshake. Use Value: Delivers repeatable 15-bit ENOB at 100 kSPS, meeting ATE accuracy requirements for DC parametric and AC functional tests. |
| Medical Instrumentation | Power Quality Analyzers |
Use Scenario: Isolated ECG and EEG signal digitization in Class II portable diagnostic devices. IC Role / Device Role / Timing Role: Bipolar-input ADC interfacing to isolated instrumentation amplifiers, leveraging internal reference for common-mode rejection. Use Value: ±10 V range accommodates amplified bio-potential signals; 2 µs transient response ensures accurate capture of QRS complex edges. |
Use Scenario: Simultaneous voltage/current sampling for harmonic distortion and flicker analysis in grid-connected inverters. IC Role / Device Role / Timing Role: Dual-channel acquisition front-end (paired AD976ARSZ units) with synchronized R/C triggering for phase-coherent sampling. Use Value: 700 kHz full-power bandwidth and 83 dB SFDR enable compliant IEC 61000-4-30 Class A harmonic measurement up to 50th order. |
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 resolution, 100 kSPS, same SSOP-28 package, lower power (60 mW), no internal reference. | Suitable for cost-sensitive applications where 14-bit ENOB suffices and external reference is acceptable. | Select AD974ARZ when system-level SNR budget allows 14-bit performance and board space permits external reference routing. |
| ADS8505IPW | 16-bit, 250 kSPS, SPI interface, ±10 V input, integrated reference, 28-TSSOP package. | Replaces parallel bus with serial interface; better suited for FPGA or ARM-based designs with limited GPIO resources. | Choose ADS8505IPW when migrating from microcontroller-based to processor-based architectures requiring reduced pin count and higher throughput. |
Compared with AD976ARSZ, AD974ARZ trades 2 bits of resolution and removes the internal reference to reduce cost and power, while ADS8505IPW upgrades throughput and replaces parallel I/O with SPI - making it more suitable for modern embedded processors but requiring firmware redesign.
Availability
AD976ARSZ is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, medical instrumentation, and power quality analyzers requiring stable component supply and long-term obsolescence management.
Supply support for AD976ARSZ 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, headquartered in Wilmington, MA, with deep expertise in precision data conversion and signal conditioning.
The AD976 family was designed specifically for high-accuracy, medium-speed data acquisition in industrial and instrumentation applications - emphasizing factory-calibrated linearity, single-supply operation, and integrated reference stability over raw speed.
FAQ
What is the maximum sampling rate supported by the AD976ARSZ?
The AD976ARSZ supports a maximum throughput rate of 100 kSPS, corresponding to a minimum conversion time of 10 µs per sample. This is confirmed in the AD976 specifications table under "THROUGHPUT SPEED" with "Complete Cycle" = 10 µs and "Throughput Rate" = 100 kHz. The AD976A variant achieves 200 kSPS, but AD976ARSZ is the 100 kSPS grade. Timing diagrams (Figures 2 and 3) validate BUSY-driven synchronization at this rate.
Does the AD976ARSZ require external calibration components?
No, the AD976ARSZ does not require external calibration components for baseline operation. It is factory calibrated for offset, gain, and linearity, with on-chip ROM-stored coefficients applied during conversion. Figures 7 and 8 and the "PRODUCT HIGHLIGHTS" section confirm that internal calibration minimizes all linearity errors. External trim resistors (e.g., R3/R4 in Fig. 7) are optional and only needed if system-level accuracy exceeds the specified ±3 LSB INL.
Can the AD976ARSZ operate with an external reference voltage?
Yes, the AD976ARSZ supports external reference operation. The REF pin accepts an external voltage from 2.3 V to 2.7 V for specified linearity, as stated in both AD976 and AD976A specification tables under "External Reference Voltage Range". When an external reference is applied, the internal 2.5 V reference is overridden, and full-scale input becomes ±4×VREF, enabling flexible scaling for non-standard sensor ranges.
What package type is used for the AD976ARSZ?
The AD976ARSZ uses a 28-lead Shrink Small Outline Package (SSOP), also designated RW-28 in Analog Devices' ordering guide. This is explicitly listed in the "ORDERING GUIDE" table for model AD976ARS, with package description "28-Lead Shrink Small Outline Package" and option code "RS-28". The pin configuration diagram (page 5) and absolute maximum ratings (page 5) confirm SSOP mechanical dimensions and thermal characteristics (θJA = 109°C/W).
How is data read from the AD976ARSZ - parallel or serial?
The AD976ARSZ uses a parallel 16-bit interface with binary twos-complement output format. Data appears on pins D15 (MSB) through D0 (LSB) after conversion completes and BUSY goes HIGH. The BYTE pin allows reordering of the 16-bit word into two 8-bit bytes for compatibility with 8-bit microcontrollers - as detailed in the "PIN FUNCTION DESCRIPTIONS" and Figure 4 timing diagram. No serial interface (SPI/I²C) is present.
AD976ARSZ 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:
- -
AD976ARSZ FAQ
1.How can I place an order for AD976ARSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD976ARSZ 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 AD976ARSZ reliable?
The price and inventory of AD976ARSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD976ARSZ is usually 5 days.
3.What payment methods are accepted for AD976ARSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD976ARSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD976ARSZ?
AD976ARSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD976ARSZ 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 AD976ARSZ?
For technical support, including AD976ARSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD976ARSZ requirements.
6.How does Aetrix verify that AD976ARSZ is sourced from the original manufacturer or authorized distributors?
All AD976ARSZ 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 AD976ARSZ meets industry standards.
7.What is the process for return or replacement of AD976ARSZ?
All AD976ARSZ units undergo pre-shipment inspection (PSI). If there is an issue with AD976ARSZ, 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 AD976ARSZ part is unused and in its original packaging.
Return procedure for AD976ARSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD976ARSZ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
