My Inquiry
My Account
Analog Devices Inc. AD976CRZ
- Part No.:
- AD976CRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD976CRZ.pdf
- Description:
- IC ADC 16BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,309
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD976CRZ 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 data acquisition in industrial instrumentation and test equipment requiring high DC accuracy and low power.
For engineers reviewing the AD976CRZ datasheet, AD976CRZ pinout, AD976CRZ application, or AD976CRZ equivalent, this page delivers verified specifications, package mapping, real-world timing behavior, and validated alternative options for system-level design and BOM continuity planning.
Technical Context
The AD976CRZ implements a successive-approximation ADC 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 acting as ROM.
It operates from a single 5 V supply (VDIG = VANA = 4.75–5.25 V), supports both internal and external 2.5 V reference configurations, and delivers full-scale error ≤ ±0.5% with ±7 ppm/°C drift - all while maintaining 83 dB signal-to-(noise + distortion) at 100 kHz throughput.
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 - fixed conversion time of 10 µs enables deterministic sampling in closed-loop control |
| Analog Input Range | ±10 V - compatible with standard industrial sensor outputs without external level-shifting |
| DC Accuracy (INL) | ±3 LSB max - ensures monotonicity and no missing codes across operating temperature |
| Power Dissipation | 100 mW max - enables use in thermally constrained embedded systems with minimal heatsinking |
| Reference | Internal 2.5 V ±20 mV - eliminates need for external reference IC unless higher stability required |
| Digital Interface | Parallel 16-bit, binary two's complement - directly interfaces to 16-bit microcontrollers and DSPs without glue logic |
Pinout & Package
AD976CRZ is packaged in a 28-lead SOIC (R-28) with 0.3-inch body width and standard JEDEC MS-012AC footprint. Pin spacing is 1.27 mm, and thermal resistance θJA = 72°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | Accepts ±10 V bipolar signal via 200 Ω series resistor; ±25 V absolute max overvoltage protection |
| 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; must connect 2.2 µF tantalum capacitor to AGND2 |
| R/C | Read/Convert control | Falling edge initiates conversion when CS is low; rising edge enables data output |
| CS | Chip select | Active-low enable; OR'd internally with R/C to trigger conversion or latch data |
| BUSY | Status output | Active-low open-drain signal indicating conversion in progress; rising edge marks data validity |
| D0–D15 | Parallel data bus | 16-bit two's complement output; high-impedance when CS high or R/C low |
| BYTE | Data format control | Switches between full 16-bit (BYTE low) and byte-swapped 8-bit (BYTE high) output modes |
| VANA / VDIG | Power supplies | Separate analog (VANA) and digital (VDIG) 5 V rails minimize noise coupling; each draws ≤11 mA / 3 mA |
| AGND1 / AGND2 / DGND | Ground terminals | AGND1 references REF; AGND2 references CAP; DGND isolates digital switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-array SAR architecture | Eliminates resistor-ladder temperature drift; maintains ±3 LSB INL over –40°C to +85°C |
| On-chip calibration ROM | Stores factory-trimmed coefficients for offset, gain, and capacitor mismatch correction |
| Single-supply operation | Operates from one 5 V rail (±5%) - reduces board-level power design complexity |
| Integrated reference & clock | Includes stable 2.5 V reference and internal timing generator - no external clock required |
| Overvoltage recovery | Recovers to full accuracy within 150 ns after 2× full-scale overvoltage event |
Applications
| Industrial Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: High-accuracy voltage monitoring in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Primary ADC capturing sensor signals at 100 kSPS with deterministic 10 µs conversion latency. Use Value: ±10 V input range matches industrial transducer outputs; 83 dB S/(N+D) ensures resolution beyond 14 ENOB for calibrated measurements. |
Use Scenario: Digitizing stimulus-response waveforms during functional testing of analog circuits. IC Role / Device Role / Timing Role: Precision sampling front-end synchronized to test sequencer via R/C and BUSY handshake. Use Value: Parallel interface enables immediate data capture into FIFO memory; BUSY rising edge provides precise latching timing. |
| Medical Instrumentation | Scientific Measurement Systems |
|
Use Scenario: Signal conditioning in portable ECG/EEG amplifiers requiring low-noise, low-power digitization. IC Role / Device Role / Timing Role: Low-power 16-bit ADC interfacing to low-noise instrumentation amplifier output. Use Value: 100 mW max dissipation enables battery-powered operation; internal reference removes external component count. |
Use Scenario: High-fidelity waveform capture in spectral analysis instruments measuring harmonic content. IC Role / Device Role / Timing Role: ADC providing clean 16-bit samples for FFT-based frequency-domain analysis. Use Value: 90 dB SFDR and –90 dB THD support accurate harmonic distortion measurement up to 700 kHz full-power bandwidth. |
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 |
|---|---|---|---|
| AD976BR | Same package and pinout; improved INL of ±2 LSB (vs. ±3 LSB) and 85 dB S/(N+D) (vs. 83 dB) | Preferred where tighter DC linearity and higher AC performance are required in same PCB layout | Select AD976BR if system-level calibration budget allows tighter INL tolerance and higher SNR is critical |
| ADS8588SIPM | 8-channel simultaneous-sampling 16-bit SAR; 1 MSPS per channel; SPI interface; external reference only | Suitable for multi-channel synchronized acquisition, not single-channel high-precision standalone use | Choose ADS8588SIPM only when channel count, speed, or serial interface outweighs need for integrated reference and parallel simplicity |
Compared with AD976CRZ, AD976BR offers better linearity and SNR in identical form factor, while ADS8588SIPM trades integrated reference and parallel interface for multi-channel capability and higher speed - making AD976CRZ optimal for cost-sensitive, single-channel, reference-integrated designs.
Availability
AD976CRZ is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, and medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for AD976CRZ 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 AD976 family was engineered as a complete, single-supply 16-bit SAR ADC solution for precision measurement systems needing integrated reference, calibration, and robust industrial-grade specifications.
FAQ
What is the maximum sampling rate supported by the AD976CRZ?
The AD976CRZ supports a maximum throughput rate of 100 kSPS, corresponding to a fixed conversion time of 10 µs. This is confirmed in the AD976 specification table under "THROUGHPUT SPEED" for all grades (A/B/C) and applies specifically to the AD976CRZ variant in SOIC packaging.
Does the AD976CRZ require an external reference voltage?
No, the AD976CRZ includes an internal 2.5 V reference with ±20 mV tolerance (2.48 V to 2.52 V). An external reference may be used for improved stability, but it is not required - the internal reference is fully functional and specified for linearity across temperature.
What is the meaning of the 'C' grade in AD976CRZ?
The 'C' grade in AD976CRZ indicates the device meets ±3 LSB integral nonlinearity (INL), 83 dB signal-to-(noise + distortion), and ±15 mV bipolar zero error - the lowest performance tier among AD976 variants, optimized for cost-sensitive applications where full 16-bit linearity is not mandatory.
Can the AD976CRZ operate from a 3.3 V supply?
No, the AD976CRZ requires dual 5 V supplies: VANA and VDIG must each be 4.75 V to 5.25 V. Operation outside this range violates Absolute Maximum Ratings and is not supported - the internal reference and logic thresholds are designed exclusively for 5 V operation.
How is the BUSY signal used for data synchronization in the AD976CRZ?
The BUSY signal goes low at conversion start and returns high upon completion and data latching. The rising edge of BUSY marks exact data validity - enabling synchronous capture by external logic or microcontroller without timing margin uncertainty. This behavior is documented in Figure 2 and timing parameter t5 (180 ns BUSY delay after end of conversion).
AD976CRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD976CRZ FAQ
1.How can I place an order for AD976CRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD976CRZ 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 AD976CRZ reliable?
The price and inventory of AD976CRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD976CRZ is usually 5 days.
3.What payment methods are accepted for AD976CRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD976CRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD976CRZ?
AD976CRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD976CRZ 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 AD976CRZ?
For technical support, including AD976CRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD976CRZ requirements.
6.How does Aetrix verify that AD976CRZ is sourced from the original manufacturer or authorized distributors?
All AD976CRZ 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 AD976CRZ meets industry standards.
7.What is the process for return or replacement of AD976CRZ?
All AD976CRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD976CRZ, 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 AD976CRZ part is unused and in its original packaging.
Return procedure for AD976CRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD976CRZ 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…
