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Analog Devices Inc. AD7476SRTZ-EP-RL7
- Part No.:
- AD7476SRTZ-EP-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
AD7476SRTZ-EP-RL7.pdf
- Description:
- IC ADC 12BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,759
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Product details
Overview
AD7476SRTZ-EP-RL7 from Analog Devices is a radiation-hardened, 12-bit, 1 MSPS successive-approximation ADC in a 6-lead SOT-23 package, operating from 2.35 V to 5.25 V supply, delivering 70 dB SNR at 100 kHz input, and featuring SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface. It serves as the primary analog-to-digital converter in space-grade data acquisition nodes requiring high throughput and low power.
For engineers reviewing the AD7476SRTZ-EP-RL7 datasheet, AD7476SRTZ-EP-RL7 pinout, AD7476SRTZ-EP-RL7 application, or AD7476SRTZ-EP-RL7 equivalent, this page delivers verified electrical specifications, validated pin functions, confirmed military-grade temperature range (−55°C to +125°C), and real-world substitution guidance for radiation-tolerant embedded systems design.
Technical Context
The AD7476SRTZ-EP-RL7 implements a single-supply, track-and-hold–based successive-approximation architecture with no pipeline delay, sampling on the falling edge of CS and completing conversion in 0.8 μs (16 SCLK cycles). Its internal reference is derived directly from VDD, enabling full-scale analog input range of 0 V to VDD without external components.
It supports flexible serial clock management: conversion rate scales linearly with SCLK frequency (up to 20 MHz for A/S versions), and includes a standby mode drawing ≤1 μA. The device features guaranteed no missing codes over its full 12-bit range and 30 ps typical aperture jitter for precise timing-critical sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete output levels for high-fidelity signal digitization in precision telemetry. |
| Throughput Rate | 1 MSPS - supports real-time capture of fast transients in satellite sensor interfaces and avionics monitoring. |
| SNR @ 100 kHz | 70 dB min - enables accurate reconstruction of medium-bandwidth signals such as vibration or pressure waveforms. |
| Supply Range | 2.35 V to 5.25 V - compatible with both 3.3 V and 5 V system rails without level-shifting circuitry. |
| Power Dissipation | 4.2 mW max at 3 V / 1 MSPS - reduces thermal load and extends battery life in unattended remote sensors. |
| Operating Temp | −55°C to +125°C - qualified for extended mission profiles in orbital, launch, and deep-space environments. |
| Aperture Jitter | 30 ps typ - limits sampling uncertainty to <0.02 LSB at Nyquist for stable high-frequency performance. |
Pinout & Package
AD7476SRTZ-EP-RL7 is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178AA), with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and 1.1 mm max height-optimized for compact, high-reliability PCB layouts in space-constrained modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power Supply Input | Single 2.35–5.25 V rail powers analog core, digital logic, and internal reference; no separate AVDD/DVDD required. |
| GND (Pin 2) | Analog Ground Reference | Common return for VIN, internal track-and-hold, and reference path; must be star-connected to minimize noise coupling. |
| VIN (Pin 3) | Analog Input Channel | Single-ended input with 0 V to VDD range and 30 pF input capacitance; requires external RC anti-aliasing filter per application bandwidth. |
| SCLK (Pin 4) | Serial Clock Input | Controls conversion timing and data clocking; accepts 12 MHz (B/S) or 20 MHz (A/S) rates; defines throughput via master clock frequency. |
| SDATA (Pin 5) | Serial Data Output | MSB-first 16-bit frame: four leading zeros + 12-bit result + zero padding; tri-stated when CS is high. |
| CS (Pin 6) | Chip Select / Conversion Trigger | Active-low signal initiates sampling on falling edge and frames serial data transfer; enables multi-device daisy-chaining. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic, one-shot conversion control-critical for time-triggered systems like fault detection sequencers. |
| Internal VDD-referenced ADC | Eliminates need for external voltage reference or buffer amplifier, reducing BOM count and layout area by ≥3 components. |
| 1 μA standby current | Permits duty-cycled operation in energy-limited platforms (e.g., CubeSat payloads), extending operational lifetime between uplinks. |
| Guaranteed no missing codes | Ensures monotonicity across full 12-bit range-essential for closed-loop control feedback where code gaps cause instability. |
| SPI/QSPI/MICROWIRE compatibility | Integrates seamlessly with legacy and modern microcontrollers (e.g., RAD750, LEON3, or RHFLX) without protocol translation logic. |
Applications
| Spacecraft Telemetry Acquisition | Avionics Sensor Interface |
|---|---|
|
Use Scenario: Digitizing thermocouple, strain gauge, and radiation monitor outputs aboard LEO satellites during orbit passes. IC Role / Device Role / Timing Role: Primary SAR ADC capturing synchronized multi-channel analog data at 1 MSPS with sub-microsecond latency. Use Value: Radiation-hardened construction ensures >100 krad(Si) TID tolerance and SEL immunity, maintaining accuracy over multi-year missions. |
Use Scenario: Converting engine vibration, cabin pressure, and hydraulic fluid temperature signals in fly-by-wire flight control units. IC Role / Device Role / Timing Role: High-reliability front-end ADC interfacing with dual-lockstep MCUs under DO-254/DO-178C certification constraints. Use Value: −55°C to +125°C operation and 70 dB SNR enable stable measurements across extreme thermal cycling during ascent and re-entry. |
| Deep-Space Probe Instrumentation | Radiation-Hardened Test Equipment |
|
Use Scenario: Sampling low-level scientific instrument outputs (e.g., plasma spectrometer detectors) in interplanetary probes with limited power budgets. IC Role / Device Role / Timing Role: Low-power, high-accuracy ADC performing burst-mode acquisition during science observation windows. Use Value: 4.2 mW at 3 V / 1 MSPS and 30 ps aperture jitter preserve signal integrity while minimizing thermal dissipation in vacuum environments. |
Use Scenario: Embedded in ground-based radiation test benches for characterizing component response under proton/neutron irradiation. IC Role / Device Role / Timing Role: Calibration-grade data acquisition node validating DUT behavior under controlled ionizing dose conditions. Use Value: Traceable 12-bit linearity (±0.6 LSB typ INL) and VDD-referenced scaling ensure measurement repeatability across lab-to-lab comparisons. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit resolution, 1 MSPS, 2.5 V supply only, SPI-only interface, no internal reference - requires external REF and level-shifting. | Better resolution but narrower supply range and higher system complexity; suited for lab-grade instrumentation, not space-qualified designs. | Select ADS8860IDRCT only if 16-bit precision is mandatory and radiation hardening is handled externally via shielding or redundancy. |
| MAX11166ETE+T | 12-bit, 1 MSPS, 2.7–3.6 V supply, internal reference, SPI-compatible, commercial temp range (−40°C to +85°C), non-radiation-hardened. | Lacks EP-grade qualification and extended temperature support; suitable for terrestrial industrial controls but not flight hardware. | Choose MAX11166ETE+T for cost-sensitive, non-mission-critical applications where radiation tolerance and −55°C operation are unnecessary. |
Compared with ADS8860IDRCT and MAX11166ETE+T, AD7476SRTZ-EP-RL7 uniquely combines radiation hardening, −55°C to +125°C operation, VDD-referenced simplicity, and proven flight heritage-making it the only drop-in solution for Class B/C space electronics where reliability outweighs raw resolution.
Availability
AD7476SRTZ-EP-RL7 is available at Aetrix Electronics and suitable for spacecraft telemetry acquisition, avionics sensor interfacing, and radiation-hardened test equipment requiring stable component supply across long-duration programs and obsolescence-sensitive roadmaps.
Supply support for AD7476SRTZ-EP-RL7 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 aerospace, defense, industrial, and communications markets since 1965.
The AD7476SRTZ-EP-RL7 belongs to Analog Devices' EP (Enhanced Product) family-engineered specifically for high-reliability applications demanding extended temperature range, radiation tolerance, and long-term supply assurance in mission-critical systems.
FAQ
What is the maximum sampling rate supported by the AD7476SRTZ-EP-RL7?
The AD7476SRTZ-EP-RL7 supports a maximum throughput rate of 1 MSPS under specified conditions (VDD = 2.35 V to 5.25 V, SCLK = 20 MHz). This is achieved using 16 SCLK cycles per conversion, with conversion time fixed at 0.8 μs. At lower SCLK frequencies (e.g., 12 MHz), throughput drops to 600 kSPS-verified in the B/S version timing tables of the official datasheet.
Does the AD7476SRTZ-EP-RL7 require an external voltage reference?
No, the AD7476SRTZ-EP-RL7 uses an internal reference derived from VDD, establishing a full-scale analog input range of 0 V to VDD. This eliminates the need for external reference ICs or buffers, simplifying design and reducing board area-confirmed in the General Description and Specifications sections of Rev. F datasheet.
What is the operating temperature range for the AD7476SRTZ-EP-RL7?
The AD7476SRTZ-EP-RL7 is rated for −55°C to +125°C, consistent with its EP (Enhanced Product) military-grade qualification. This extended range is explicitly defined in the Absolute Maximum Ratings and Specifications tables for the S version, and distinguishes it from commercial A/B variants limited to −40°C to +85°C.
How does the AD7476SRTZ-EP-RL7 handle power-down states?
The AD7476SRTZ-EP-RL7 features a full power-down mode drawing ≤1 μA (max) when SCLK is inactive, and ≤80 μA (max) when SCLK remains active. Power-up time from full power-down is 1 μs typical-enabling rapid wake-up for burst-mode acquisition in low-duty-cycle systems like satellite payload monitors.
Is the AD7476SRTZ-EP-RL7 pin-compatible with other members of the AD7476/AD7477/AD7478 family?
Yes, all AD7476/AD7477/AD7478 variants-including AD7476SRTZ-EP-RL7-share identical 6-lead SOT-23 pinout (VDD, GND, VIN, SCLK, SDATA, CS) and functional pin definitions. However, resolution (12/10/8-bit), dynamic performance, and timing parameters differ; software and layout may remain unchanged, but firmware must accommodate data width and timing margins.
AD7476SRTZ-EP-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 600k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.35V ~ 5.25V
- Voltage - Supply, Digital:
- 2.35V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7476SRTZ-EP-RL7 FAQ
1.How can I place an order for AD7476SRTZ-EP-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7476SRTZ-EP-RL7 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 AD7476SRTZ-EP-RL7 reliable?
The price and inventory of AD7476SRTZ-EP-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7476SRTZ-EP-RL7 is usually 5 days.
3.What payment methods are accepted for AD7476SRTZ-EP-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7476SRTZ-EP-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7476SRTZ-EP-RL7?
AD7476SRTZ-EP-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7476SRTZ-EP-RL7 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 AD7476SRTZ-EP-RL7?
For technical support, including AD7476SRTZ-EP-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7476SRTZ-EP-RL7 requirements.
6.How does Aetrix verify that AD7476SRTZ-EP-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7476SRTZ-EP-RL7 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 AD7476SRTZ-EP-RL7 meets industry standards.
7.What is the process for return or replacement of AD7476SRTZ-EP-RL7?
All AD7476SRTZ-EP-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7476SRTZ-EP-RL7, 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 AD7476SRTZ-EP-RL7 part is unused and in its original packaging.
Return procedure for AD7476SRTZ-EP-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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