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Analog Devices Inc. AD7274BRM
- Part No.:
- AD7274BRM
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7274BRM.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
AD7274BRM from Analog Devices is a 12-bit, 3 MSPS successive approximation ADC operating from a single 2.35 V to 3.6 V supply, featuring 70 dB SNR at 1 MHz input, ±1 LSB INL/DNL, and external reference support from 1.4 V to VDD. It delivers high-speed data acquisition in space-constrained industrial sensor interfaces and portable instrumentation.
For engineers reviewing the AD7274BRM datasheet, AD7274BRM pinout, AD7274BRM application, or AD7274BRM equivalent, this page provides verified technical context, real-world timing behavior, package-specific layout guidance, and validated alternative options for high-throughput, low-power sampling systems requiring stable DC accuracy and wide input bandwidth.
Technical Context
The AD7274BRM implements a charge redistribution DAC-based successive approximation architecture with no pipeline delay, enabling deterministic conversion timing controlled solely by CS and SCLK. Its track-and-hold amplifier supports full-power bandwidth up to 55 MHz and acquires signals within 60 ns.
Conversion is initiated on the falling edge of CS, with data clocked out MSB-first on SDATA's falling edge of SCLK. The serial interface is SPI-/QSPI-/MICROWIRE-/DSP-compatible, requiring 14 SCLK cycles (at up to 48 MHz) for full 12-bit output plus framing bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic transfer function with no missing codes across full temperature range. |
| Throughput Rate | 3 MSPS - maximum sustained sampling rate achievable with 48 MHz SCLK and 14-cycle serial readout. |
| SNR @ 1 MHz | 69.5 dB min - enables >11.3 ENOB for precision measurement of medium-frequency analog signals. |
| INL / DNL | ±1 LSB max - ensures accurate end-point linearity and code-to-code monotonicity in closed-loop control. |
| Power @ 3 MSPS | 11.4 mW typ at 3 V - supports battery-powered or thermally constrained designs without active cooling. |
| Input Bandwidth | 55 MHz @ −3 dB - accommodates wideband sensor outputs and RF IF sampling up to Nyquist limit. |
| Reference Range | 1.4 V to VDD - allows flexible scaling from low-voltage rails while maintaining full dynamic range. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and downhole sensing. |
Pinout & Package
AD7274BRM is housed in an 8-lead TSOT (Thin Small Outline Transistor) package, measuring 3 mm × 3 mm × 0.8 mm, with exposed pad for thermal enhancement and mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | Single 2.35–3.6 V rail powering analog and digital sections; requires local 100 nF + 10 μF decoupling to AGND. |
| SDATA (Pin 2) | Serial data output | Three-state CMOS output delivering 12-bit result MSB-first after two leading zeros; timing-critical for SCLK falling edge. |
| CS (Pin 3) | Chip select / conversion trigger | Active-low signal initiating sample-and-hold capture on falling edge and framing serial data transfer. |
| AGND (Pin 4) | Analog ground reference | Star-ground connection point for VIN, VREF, and analog decoupling; must be isolated from DGND except at single point. |
| VREF (Pin 5) | External reference input | Accepts 1.4–VDD voltage; requires 10 μF capacitor to AGND to suppress noise and maintain reference stability during conversion. |
| SCLK (Pin 6) | Serial clock input | Drives both data readout and internal SAR conversion clock; supports up to 48 MHz with 40/60 duty cycle. |
| DGND (Pin 7) | Digital ground reference | Return path for SDATA, CS, and SCLK; must remain within 0.3 V of AGND potential to prevent cross-talk. |
| VIN (Pin 8) | Analog input channel | Single-ended input with 0–VREF range; 42 pF input capacitance in track mode demands careful driver impedance matching. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic latency of exactly one conversion cycle (333 ns at 3 MSPS), critical for real-time feedback loops. |
| Flexible power management | Full power-down mode draws only 0.1 μA typ, allowing microsecond-scale wake-up for burst-mode acquisition. |
| Wide supply range | Operates from 2.35 V to 3.6 V without performance degradation-supports direct Li-ion or regulated 3.3 V rails. |
| High-speed serial interface | Native SPI-compatible protocol eliminates need for glue logic or level-shifting when interfacing with ARM Cortex-M or DSPs. |
| Robust AC performance | 70 dB SNR at 1 MHz and −80 dB SFDR ensure fidelity in demanding applications like ultrasound front-ends and vibration analysis. |
Applications
| Industrial Motor Control | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: Real-time current and voltage sampling in three-phase inverter gate drivers for field-oriented control. IC Role / Device Role / Timing Role: High-speed analog front-end digitizing phase currents with sub-microsecond latency to enable precise PWM synchronization. Use Value: 3 MSPS throughput and 60 ns acquisition time allow oversampling at 10× switching frequency, improving torque ripple suppression. |
Use Scenario: Battery-powered ECG and EEG signal conditioning in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-power ADC capturing biopotential waveforms with minimal thermal drift across body-temperature range. Use Value: 11.4 mW operational power and −40°C to +125°C rating support extended runtime and reliability in clinical environments. |
| Automotive Sensor Interface | Test & Measurement Equipment |
|
Use Scenario: Front-end digitization of pressure, temperature, and knock sensor outputs in engine control units. IC Role / Device Role / Timing Role: Rugged ADC handling noisy 12 V system environments with high PSRR (82 dB) and robust ESD tolerance (1.5 kV). Use Value: External reference flexibility (1.4–VDD) enables direct use of stable 2.5 V or 3.0 V sensor excitation rails without additional regulators. |
Use Scenario: Digitizing intermediate-frequency signals in handheld spectrum analyzers and oscilloscope modules. IC Role / Device Role / Timing Role: Wide 55 MHz full-power bandwidth and 70 dB SNR deliver usable dynamic range up to Nyquist (1.5 MHz). Use Value: No pipeline delay ensures exact alignment between trigger event and first sampled point-essential for time-domain analysis accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7274BCPZ-RL7 | Same 12-bit resolution, 3 MSPS, and functional pinout-but in 8-lead LFCSP (3 mm × 3 mm) with enhanced thermal performance (θJA = 125°C/W). | Better suited for high-density PCBs requiring lower junction temperature rise under continuous operation. | Select AD7274BCPZ-RL7 when board-level thermal management is constrained and exposed-pad soldering is feasible. |
| ADS8326IDRCT | 16-bit, 1 MSPS SAR ADC with integrated reference and internal oscillator; larger 10-pin VSON package; higher power (15 mW). | Targets higher-resolution, lower-throughput applications where DC accuracy outweighs speed-e.g., precision data loggers. | Choose ADS8326IDRCT only when 16-bit resolution and self-contained reference are mandatory, accepting 3× lower throughput and larger footprint. |
Compared with AD7274BRM, AD7274BCPZ-RL7 offers identical electrical performance in a thermally superior package, while ADS8326IDRCT trades speed and size for resolution and integration-making AD7274BRM optimal for compact, high-throughput, externally referenced systems.
Availability
AD7274BRM is available at Aetrix Electronics and suitable for industrial motor control, portable medical instrumentation, automotive sensor interface, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7274BRM 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 Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The AD7273/AD7274 product line was engineered for space-constrained, battery-sensitive applications demanding high-speed sampling without pipeline latency-targeting industrial automation, portable diagnostics, and automotive subsystems.
FAQ
What is the maximum sampling rate supported by the AD7274BRM?
The AD7274BRM achieves a maximum throughput rate of 3 MSPS when operated with a 48 MHz SCLK and using the 14-cycle serial readout sequence. This rate is guaranteed across the full −40°C to +125°C temperature range and 2.35 V to 3.6 V supply voltage, with no pipeline delay affecting timing predictability. The AD7274BRM maintains this performance without requiring external clocks or complex configuration registers.
Does the AD7274BRM require an external voltage reference?
Yes, the AD7274BRM requires an external voltage reference applied to the VREF pin. The reference voltage must be between 1.4 V and VDD, and a 10 μF capacitor is mandatory between VREF and AGND to ensure stability during conversion. Unlike some integrated-reference ADCs, the AD7274BRM does not include an internal reference, enabling flexible scaling and improved noise immunity when paired with precision external references.
What package type is used for the AD7274BRM?
The AD7274BRM uses an 8-lead TSOT (Thin Small Outline Transistor) package, measuring 3 mm × 3 mm × 0.8 mm with gull-wing leads and an exposed thermal pad. This package is distinct from the MSOP variant (AD7274ARMZ) and optimized for high-density layouts where board area and thermal resistance are critical. Pin assignments match the functional diagram in the official Analog Devices datasheet Rev. 0.
How does the AD7274BRM handle power management in low-duty-cycle systems?
The AD7274BRM supports three power states: normal operation (3.8 mA typ at 3 V), partial power-down (34 μA typ), and full power-down (0.1 μA typ). Full power-down is entered via CS high and maintained until the next conversion trigger, enabling microsecond-scale wake-up with 1 μs power-up time. This makes the AD7274BRM ideal for burst-mode acquisition in energy-sensitive applications such as wireless sensor nodes and portable diagnostics.
Is the AD7274BRM compatible with standard SPI interfaces?
Yes, the AD7274BRM features a native SPI-compatible serial interface that operates with standard SPI, QSPI, MICROWIRE, and DSP host controllers. It uses CS as frame sync, SCLK for clocking, and SDATA as a three-state output delivering 12-bit data MSB-first after two leading zeros. No mode configuration or initialization sequence is required-communication begins immediately upon CS assertion, simplifying firmware integration.
AD7274BRM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 3M
- 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:
- External
- Voltage - Supply, Analog:
- 2.35V ~ 3.6V
- Voltage - Supply, Digital:
- 2.35V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7274BRM FAQ
1.How can I place an order for AD7274BRM through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7274BRM 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 AD7274BRM reliable?
The price and inventory of AD7274BRM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7274BRM is usually 5 days.
3.What payment methods are accepted for AD7274BRM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7274BRM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7274BRM?
AD7274BRM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7274BRM 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 AD7274BRM?
For technical support, including AD7274BRM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7274BRM requirements.
6.How does Aetrix verify that AD7274BRM is sourced from the original manufacturer or authorized distributors?
All AD7274BRM 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 AD7274BRM meets industry standards.
7.What is the process for return or replacement of AD7274BRM?
All AD7274BRM units undergo pre-shipment inspection (PSI). If there is an issue with AD7274BRM, 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 AD7274BRM part is unused and in its original packaging.
Return procedure for AD7274BRM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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