My Inquiry
My Account
Analog Devices Inc. AD7476SRT-R2
- Part No.:
- AD7476SRT-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
AD7476SRT-R2.pdf
- Description:
- IC ADC 12BIT 1MSPS SOT-23-6 TR
- Quantity:
- Payment:
- Shipping:
Inventory:199
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7476SRT-R2 from Analog Devices is a 12-bit, successive-approximation analog-to-digital converter (ADC) in a 6-lead SOT-23 package, operating from 2.35 V to 5.25 V with 1 MSPS throughput, 70 dB SNR at 100 kHz input, and no pipeline delay-designed for battery-powered data acquisition and portable instrumentation.
For engineers reviewing the AD7476SRT-R2 datasheet, AD7476SRT-R2 pinout, AD7476SRT-R2 application, or AD7476SRT-R2 equivalent, this page delivers verified electrical specs, real-world use cases, validated alternatives, and supply-ready sourcing guidance-focused on low-power, high-speed single-ended sampling in space-constrained embedded systems.
Technical Context
The AD7476SRT-R2 implements a standard successive-approximation register (SAR) architecture with internal track-and-hold, sampling on the falling edge of CS and completing conversion in exactly 16 SCLK cycles. Its reference is derived directly from VDD, enabling a full-scale analog input range of 0 V to VDD without external components.
It interfaces via SPI-/QSPI-/MICROWIRE-/DSP-compatible serial protocol with no latency or pipelining, supports flexible clock speed management (up to 20 MHz SCLK), and enters standby mode drawing ≤1 μA-making it suitable for duty-cycled sensor readout and energy-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 1 LSB = VDD/4096 quantization step, supporting precise measurement of small-signal variations in medical or optical sensors. |
| Throughput Rate | 1 MSPS - enables real-time capture of signals up to 500 kHz Nyquist bandwidth, sufficient for high-speed modem or control-loop sampling. |
| SNR @ 100 kHz | 70 dB min - ensures ≥11.3 effective number of bits (ENOB) for clean digitization of mid-frequency analog waveforms. |
| Power Dissipation | 4.8 mW max at 3 V / 1 MSPS - allows continuous operation in coin-cell–powered devices for >1 year with typical 100 kSPS duty cycling. |
| Analog Input Range | 0 V to VDD - eliminates need for level-shifting circuitry when interfacing with rail-to-rail output op-amps or sensors. |
| Conversion Time | 0.8 μs max - guarantees deterministic timing for time-critical trigger-based acquisition in instrumentation and control systems. |
| Standby Current | 1 μA max - supports ultra-low-power sleep states between measurements without external power gating. |
Pinout & Package
AD7476SRT-R2 is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178AA), with 1.3 mm × 2.1 mm footprint and 0.95 mm height-optimized for compact PCB layouts in handheld and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | Supplies all internal circuitry; also serves as ADC reference source-requires local 100 nF decoupling to GND for noise-sensitive conversions. |
| GND (Pin 2) | Analog ground reference | Common return path for analog input and internal reference; must be routed separately from digital ground to minimize noise coupling. |
| VIN (Pin 3) | Analog input channel | Single-ended input accepting 0 V to VDD range; 30 pF input capacitance requires careful driver impedance matching for settling accuracy. |
| SCLK (Pin 4) | Serial clock input | Controls both data transfer timing and conversion clocking-supports up to 20 MHz; duty cycle tolerance 40/60 to 60/40. |
| SDATA (Pin 5) | Serial data output | MSB-first 16-bit frame: four leading zeros + 12-bit result + zero padding; tri-states after conversion completes per t8 timing spec. |
| CS (Pin 6) | Chip select / conversion trigger | Active-low signal initiating sample-and-hold on falling edge; also frames serial data-minimum pulse width 10 ns. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Guaranteed deterministic 0.8 μs conversion time with immediate data availability-enables tight control-loop timing in motor drives and feedback systems. |
| Supply-derived reference | VDD-referenced architecture eliminates external voltage reference IC and associated BOM cost, layout area, and drift sources. |
| Flexible serial interface | Fully compatible with SPI, QSPI, MICROWIRE, and DSP host controllers-no protocol translation logic required. |
| Ultra-low standby current | 1 μA maximum shutdown current allows integration into always-on sensor nodes without compromising battery life. |
| Wide supply range | Operates from 2.35 V to 5.25 V-supports direct connection to Li-ion, Li-Po, or regulated 3.3 V/5 V rails without LDO overhead. |
Applications
| Portable Medical Sensors | Optical Sensor Signal Chain |
|---|---|
Use Scenario: Digitizing photodiode current outputs in pulse oximeters and glucose monitors where size and battery life are critical. IC Role / Device Role / Timing Role: Single-ended 12-bit SAR ADC capturing analog front-end signals at 100–500 kSPS with minimal power overhead. Use Value: 70 dB SNR preserves clinical-grade signal fidelity while 4.8 mW operational power extends device runtime beyond 24 hours on a CR2032 cell. |
Use Scenario: Converting ambient light or proximity sensor outputs in smartphones and wearables with strict PCB area constraints. IC Role / Device Role / Timing Role: Compact 6-lead SOT-23 ADC providing rail-to-rail input tracking and fast wake-up from standby for event-driven sensing. Use Value: 1 μA shutdown current and 0.8 μs conversion enable responsive, low-duty-cycle operation-reducing average system power by >90% versus continuous sampling. |
| Industrial Data Loggers | Wireless Sensor Nodes |
Use Scenario: Sampling temperature, pressure, or vibration transducers in remote field-deployed loggers powered by energy harvesting or primary batteries. IC Role / Device Role / Timing Role: Low-noise, wide-bandwidth ADC interfacing directly to op-amp buffers without external reference or clock generation. Use Value: Full 0 V to VDD input range simplifies analog front-end design; 6.5 MHz full-power bandwidth accommodates anti-alias filtering with relaxed component tolerances. |
Use Scenario: Integrating into sub-GHz or BLE-enabled sensor modules requiring minimal BoM count and predictable power budgeting. IC Role / Device Role / Timing Role: Serial-output ADC synchronized to microcontroller SPI peripheral with no glue logic or timing uncertainty. Use Value: SPI-compatible interface and deterministic 16-cycle conversion allow precise scheduling of radio transmit windows-avoiding contention and reducing overall system latency. |
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 |
|---|---|---|---|
| AD7476ARTZ-R2 | Same die, 6-lead SOT-23 package but with tape-and-reel packaging per JEDEC standard; identical electrical specs and pinout. | Designed for automated SMT assembly; same thermal and electrical behavior-direct drop-in replacement in production lines. | Select AD7476ARTZ-R2 for volume manufacturing with pick-and-place equipment; AD7476SRT-R2 is optimized for prototyping and low-volume evaluation. |
| ADS7822U | 12-bit SAR ADC in 8-lead SOIC; 200 kSPS max throughput; requires external reference; higher 1.25 mW power at 3 V. | Better suited for board-level designs with available space and need for external reference flexibility; not pin-compatible. | Choose ADS7822U only if external reference control or SOIC handling is mandatory; AD7476SRT-R2 offers superior speed, lower power, and smaller footprint. |
Compared with AD7476ARTZ-R2, AD7476SRT-R2 shares identical performance but differs in reel packaging configuration-making it ideal for engineering validation. Versus ADS7822U, AD7476SRT-R2 delivers 5× higher throughput, 3.8× lower active power, and 30% smaller PCB area-critical for miniaturized wireless and portable systems.
Availability
AD7476SRT-R2 is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and industrial data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7476SRT-R2 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 AD7476SRT-R2 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for space-constrained, low-power applications demanding high throughput without sacrificing DC accuracy or dynamic performance.
FAQ
What is the maximum sampling rate supported by the AD7476SRT-R2?
The AD7476SRT-R2 supports a maximum throughput rate of 1 MSPS under specified conditions: VDD = 2.7 V to 5.25 V and fSCLK = 20 MHz. This corresponds to a minimum conversion time of 0.8 μs and requires 16 SCLK cycles per sample. At lower supply voltages (e.g., 2.35 V), the maximum rate reduces to 600 kSPS per the B/S version specifications documented in the AD7476 datasheet Rev. F.
Does the AD7476SRT-R2 require an external voltage reference?
No, the AD7476SRT-R2 uses an internal reference derived from the VDD supply, enabling a full-scale analog input range of 0 V to VDD. This eliminates the need for an external reference IC, reducing BOM cost, PCB area, and potential error sources such as reference drift or noise coupling-making it ideal for compact, cost-sensitive designs.
What are the operating temperature limits for the AD7476SRT-R2?
The AD7476SRT-R2 is rated for commercial operation from −40°C to +85°C (A version). It is not the extended-temperature S version (−55°C to +125°C); that variant carries the suffix "-SR" or "-SRT" with different ordering codes. The SRT-R2 suffix indicates the commercial-grade 6-lead SOT-23 package with tape-and-reel packaging optimized for prototyping and low-volume use.
How does the AD7476SRT-R2 handle power-down mode?
The AD7476SRT-R2 enters full power-down mode when the SCLK is held inactive and CS remains high, drawing ≤1 μA typical current. Power-up time from this state is 1 μs typical. This feature enables aggressive duty-cycling in battery-powered applications-such as waking once per second to sample a sensor-without external power switches or sequencing circuitry.
Is the AD7476SRT-R2 pin-compatible with other members of the AD7476/AD7477/AD7478 family?
Yes, the AD7476SRT-R2 shares identical pinout, package, and interface timing with AD7477SRT-R2 and AD7478SRT-R2. All three variants use the same 6-lead SOT-23 footprint and 6-pin functional mapping (VDD, GND, VIN, SCLK, SDATA, CS), allowing hardware reuse across 12-/10-/8-bit resolution requirements-provided software handles differing data word lengths (12 vs. 10 vs. 8 bits).
AD7476SRT-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- SPI, DSP
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7476SRT-R2 FAQ
1.How can I place an order for AD7476SRT-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7476SRT-R2 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 AD7476SRT-R2 reliable?
The price and inventory of AD7476SRT-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7476SRT-R2 is usually 5 days.
3.What payment methods are accepted for AD7476SRT-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7476SRT-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7476SRT-R2?
AD7476SRT-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7476SRT-R2 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 AD7476SRT-R2?
For technical support, including AD7476SRT-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7476SRT-R2 requirements.
6.How does Aetrix verify that AD7476SRT-R2 is sourced from the original manufacturer or authorized distributors?
All AD7476SRT-R2 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 AD7476SRT-R2 meets industry standards.
7.What is the process for return or replacement of AD7476SRT-R2?
All AD7476SRT-R2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7476SRT-R2, 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 AD7476SRT-R2 part is unused and in its original packaging.
Return procedure for AD7476SRT-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7476SRT-R2 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…
