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Analog Devices Inc. AD7274BUJZ-500RL7
- Part No.:
- AD7274BUJZ-500RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
AD7274BUJZ-500RL7.pdf
- Description:
- IC ADC 12BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:564
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Product details
Overview
AD7274BUJZ-500RL7 from Analog Devices is a 12-bit, 3 MSPS successive approximation ADC in an 8-lead TSOT package, operating from 2.35 V to 3.6 V supply. It delivers 69.5 dB SNR at 1 MHz input, 70 dB SINAD, ±1 LSB INL/DNL, and supports external reference from 1.4 V to VDD - used in high-speed sensor signal conditioning for industrial data acquisition systems.
For engineers reviewing the AD7274BUJZ-500RL7 datasheet, AD7274BUJZ-500RL7 pinout, AD7274BUJZ-500RL7 application, or AD7274BUJZ-500RL7 equivalent, key selection criteria include guaranteed no missing codes, aperture jitter of 18 ps typ, full power bandwidth of 55 MHz, and SPI/QSPI/MICROWIRE-compatible serial interface with no pipeline delay.
Technical Context
The AD7274BUJZ-500RL7 implements a charge redistribution DAC-based successive approximation architecture with on-chip track-and-hold, sampling on the falling edge of CS and initiating conversion simultaneously. Its conversion time is fixed at 291 ns max (14 SCLK cycles at 48 MHz), with acquisition time ≤60 ns.
It uses a single-supply analog front-end referenced to external VREF (1.4 V to VDD), supports flexible serial clock scaling down to 500 kHz, and features three power modes: normal (11.4 mW typ at 3 V/3 MSPS), partial power-down (102 μW), and full power-down (0.1 μA typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic transfer function and no missing codes up to 12 bits. |
| Throughput Rate | 3 MSPS - maximum sustained sampling rate with full DC and AC accuracy maintained. |
| SNR @ 1 MHz | 69.5 dB min - enables >11.2 ENOB for precision measurement of medium-frequency analog signals. |
| INL / DNL | ±1 LSB max - ensures linearity critical for closed-loop control and calibration-critical instrumentation. |
| Aperture Jitter | 18 ps typ - limits sampling uncertainty to <0.02% of 12-bit LSB at 1 MHz input. |
| Supply Range | 2.35 V to 3.6 V - compatible with Li-ion, 3.3 V logic, and low-voltage embedded systems. |
| Reference Range | 1.4 V to VDD - allows flexible scaling of input range (0 to VREF) without external level-shifting. |
Pinout & Package
AD7274BUJZ-500RL7 is housed in an 8-lead TSOT (Thin Small Outline Transistor) package, 3 mm × 1.7 mm × 0.8 mm, lead pitch 0.5 mm, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | Single 2.35–3.6 V supply powering analog and digital sections; requires local 100 nF + 10 μF decoupling. |
| SDATA (Pin 2) | Serial data output | Three-state CMOS output delivering 12-bit result MSB-first: two leading zeros + 12 data bits + two trailing zeros. |
| CS (Pin 7) | Active-low chip select | Initiates sampling on falling edge and frames serial data; minimum pulse width 3 ns. |
| AGND (Pin 8) | Analog ground reference | Return path for VIN, VREF, and internal analog circuitry; must be separated from DGND but tied at single point. |
| VREF (Pin 5) | External reference input | Defines full-scale input range (0 to VREF); requires 10 μF capacitor to AGND for stability. |
| SCLK (Pin 6) | Serial clock input | Drives both data transfer and internal conversion timing; supports 500 kHz–48 MHz, 40/60 duty cycle. |
| DGND (Pin 3) | Digital ground reference | Return path for SDATA, CS, SCLK; must remain within 0.3 V of AGND under all transient conditions. |
| VIN (Pin 4) | Analog input channel | Single-ended input with 42 pF capacitance in track mode; accepts 0 to VREF range with ±1 μA leakage (−40°C to +85°C). |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic latency (291 ns max conversion + 60 ns acquisition) for real-time feedback loops. |
| SPI/QSPI/MICROWIRE/DSP-compatible interface | Direct connection to common microcontrollers (e.g., STM32, C2000, TMS320F28xx) without protocol translation. |
| −40°C to +125°C operation | Validated performance across full industrial temperature range without derating or calibration drift compensation. |
| Flexible power management | Full power-down mode draws only 0.1 μA typ, enabling ultra-low-power wake-on-event architectures. |
| Wide input bandwidth (55 MHz @ −3 dB) | Supports accurate digitization of fast transients and wideband sensor outputs (e.g., piezoelectric, RF envelope). |
Applications
| Industrial Process Monitoring | Motor Phase Current Sensing |
|---|---|
Use Scenario: Real-time monitoring of pressure, temperature, and flow sensor outputs in PLC I/O modules and distributed control systems. IC Role / Device Role / Timing Role: Primary high-speed analog front-end ADC acquiring synchronized multi-channel sensor data at 3 MSPS with deterministic latency. Use Value: 12-bit resolution and ±1 LSB INL enable sub-0.05% full-scale measurement accuracy required for SIL-2 compliant loop integrity checks. |
Use Scenario: Isolated current sensing in three-phase inverter drives using shunt resistors and isolated amplifiers. IC Role / Device Role / Timing Role: High-bandwidth digitizer capturing fast current transients during PWM switching edges (≤100 ns rise time). Use Value: 55 MHz full-power bandwidth and 18 ps aperture jitter preserve fidelity of 10–20 kHz motor current harmonics for FOC algorithms. |
| Portable Test Equipment | High-Speed Data Logger |
Use Scenario: Battery-powered handheld oscilloscopes and waveform analyzers requiring low power and compact size. IC Role / Device Role / Timing Role: Core ADC in 12-bit, 3 MSPS acquisition path with minimal external components and no external clock generator. Use Value: 11.4 mW typical power at 3 V enables >8 hours runtime on 2000 mAh Li-ion battery while maintaining 12-bit dynamic range. |
Use Scenario: Continuous recording of vibration, acoustic, or EMI signatures in predictive maintenance gateways. IC Role / Device Role / Timing Role: Low-latency, low-jitter digitizer feeding FPGA or DSP for real-time FFT and spectral analysis. Use Value: SPI-compatible serial interface with no pipeline delay simplifies FIFO buffering and reduces DMA overhead in burst capture modes. |
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 |
|---|---|---|---|
| AD7274BRMZ-REEL | Same 12-bit/3 MSPS specs, but in 8-lead MSOP package (3 mm × 3 mm); thermal resistance θJA = 205.9°C/W vs. TSOT's 230°C/W. | Better thermal performance in convection-cooled PCBs; less suitable for ultra-dense layouts where 3 mm × 1.7 mm footprint is mandatory. | Select AD7274BRMZ-REEL when board space allows larger package and thermal dissipation is prioritized over miniaturization. |
| ADS7953IRHBT | 12-bit, 1 MSPS, 16-channel MUX-SAR ADC; integrated sequencer and GPIO; higher power (12 mW at 1 MSPS) but lower throughput. | Designed for multi-sensor scanning (e.g., thermocouple arrays), not single-channel high-speed streaming; lacks 3 MSPS capability and 55 MHz bandwidth. | Choose ADS7953IRHBT only when channel count >1 and throughput <1.5 MSPS suffices; not a functional replacement for AD7274BUJZ-500RL7's speed or bandwidth. |
Compared with AD7274BRMZ-REEL and ADS7953IRHBT, the AD7274BUJZ-500RL7 uniquely combines 3 MSPS throughput, 55 MHz bandwidth, and 3 mm × 1.7 mm TSOT packaging - making it irreplaceable for space-constrained, high-bandwidth single-channel acquisition where thermal margin permits.
Availability
AD7274BUJZ-500RL7 is available at Aetrix Electronics and suitable for industrial process monitoring, motor phase current sensing, portable test equipment, and high-speed data logging requiring stable component supply and long-term production continuity.
Supply support for AD7274BUJZ-500RL7 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 Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The AD7273/AD7274 product line delivers high-speed, low-power SAR ADCs optimized for space-constrained industrial, automotive, and instrumentation applications where deterministic latency, wide input bandwidth, and single-supply operation are essential.
FAQ
What is the maximum sampling frequency supported by the AD7274BUJZ-500RL7?
The AD7274BUJZ-500RL7 supports a maximum throughput rate of 3 MSPS under specified conditions (VDD = 2.35 V to 3.6 V, fSCLK = 48 MHz, TA = −40°C to +125°C). This is achieved using a 14-cycle SCLK sequence per conversion, with conversion time fixed at 291 ns max and acquisition time ≤60 ns. The device maintains full DC and AC specifications - including ±1 LSB INL and 69.5 dB SNR - at this rate.
Does the AD7274BUJZ-500RL7 require an external voltage reference?
Yes, the AD7274BUJZ-500RL7 requires an external voltage reference applied to the VREF pin. The reference voltage must be between 1.4 V and VDD (2.35 V to 3.6 V), and the analog input range is 0 to VREF. A 10 μF capacitor must be placed between VREF and AGND for stability. No internal reference is provided; the device does not support ratiometric operation relative to VDD alone.
What serial interface protocols is the AD7274BUJZ-500RL7 compatible with?
The AD7274BUJZ-500RL7 features a standard 3-wire SPI-compatible serial interface (CS, SCLK, SDATA) that is also compatible with QSPI, MICROWIRE, and generic DSP serial ports. Data is output MSB-first on SDATA, framed by CS, and clocked on the falling edge of SCLK. The interface requires no configuration registers and operates deterministically with no pipeline delay - supporting direct integration with ARM Cortex-M, TI C2000, and Renesas RX microcontrollers.
What is the power consumption of the AD7274BUJZ-500RL7 in normal operational mode?
In normal operational mode at 3 MSPS, the AD7274BUJZ-500RL7 consumes 11.4 mW typical (3.8 mA at 3 V) and up to 18 mW maximum (5 mA at 3.6 V). Static current in normal mode is 1 mA typical at 3 V. Power scales linearly with SCLK frequency and supply voltage, enabling dynamic power reduction during low-throughput intervals without entering power-down states.
Is the AD7274BUJZ-500RL7 pin-compatible with the AD7273 series?
Yes, the AD7274BUJZ-500RL7 is pin-compatible with the AD7273 series (e.g., AD7273BUJZ-500RL7) in the same 8-lead TSOT package - sharing identical pinout, supply requirements, interface timing, and package dimensions. However, the AD7274BUJZ-500RL7 provides 12-bit resolution versus 10-bit, higher SNR (69.5 dB vs. 61 dB), and longer serial word length (16-bit frame vs. 14-bit), requiring firmware adaptation for data parsing.
AD7274BUJZ-500RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7274BUJZ-500RL7 FAQ
1.How can I place an order for AD7274BUJZ-500RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7274BUJZ-500RL7 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 AD7274BUJZ-500RL7 reliable?
The price and inventory of AD7274BUJZ-500RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7274BUJZ-500RL7 is usually 5 days.
3.What payment methods are accepted for AD7274BUJZ-500RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7274BUJZ-500RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7274BUJZ-500RL7?
AD7274BUJZ-500RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7274BUJZ-500RL7 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 AD7274BUJZ-500RL7?
For technical support, including AD7274BUJZ-500RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7274BUJZ-500RL7 requirements.
6.How does Aetrix verify that AD7274BUJZ-500RL7 is sourced from the original manufacturer or authorized distributors?
All AD7274BUJZ-500RL7 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 AD7274BUJZ-500RL7 meets industry standards.
7.What is the process for return or replacement of AD7274BUJZ-500RL7?
All AD7274BUJZ-500RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7274BUJZ-500RL7, 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 AD7274BUJZ-500RL7 part is unused and in its original packaging.
Return procedure for AD7274BUJZ-500RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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