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Analog Devices Inc. AD7273BUJZ-500RL7
- Part No.:
- AD7273BUJZ-500RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
AD7273BUJZ-500RL7.pdf
- Description:
- IC ADC 10BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:497
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Product details
Overview
AD7273BUJZ-500RL7 from Analog Devices is a 10-bit, 3.45 MSPS successive approximation ADC in an 8-lead TSOT package, operating from a single 2.35 V to 3.6 V supply. It features 74 MHz full-power bandwidth, 61 dB SINAD at 1 MHz input, ±0.5 LSB INL, and 9.6 mW typical power dissipation at 3 V - optimized for high-speed sensor signal digitization in industrial data acquisition systems.
For engineers reviewing the AD7273BUJZ-500RL7 datasheet, AD7273BUJZ-500RL7 pinout, AD7273BUJZ-500RL7 application, or AD7273BUJZ-500RL7 equivalent, this page delivers verified technical context, real-world interface timing constraints, validated low-power operation modes, and precise analog input performance metrics under defined supply and reference conditions.
Technical Context
The AD7273BUJZ-500RL7 implements a charge redistribution DAC-based successive approximation architecture with no pipeline delay. Conversion is initiated on the falling edge of CS, and sampling occurs synchronously with CS assertion - enabling precise control of acquisition instants in time-critical systems.
It uses a single-ended analog input (VIN) referenced to an externally supplied VREF (1.4 V to VDD), supports SPI-/QSPI-/MICROWIRE-/DSP-compatible serial readout, and provides three operational modes: normal (3.2 mA typ), partial power-down (34 μA typ), and full power-down (0.1 μA typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - guarantees monotonic output and no missing codes across full temperature range (−40°C to +125°C). |
| Throughput Rate | 3.45 MSPS maximum - achieved with 12 SCLK cycles at 48 MHz, enabling sub-290 ns conversion time. |
| SINAD | 61 dB min at 1 MHz input - defines usable dynamic range for medium-bandwidth signals like vibration or current sensing. |
| Full-Power Bandwidth | 74 MHz @ −3 dB - supports accurate digitization of fast transients up to ~10 MHz @ −0.1 dB. |
| Power Dissipation | 9.6 mW typ at 3 V / 3 MSPS - enables battery-powered or thermally constrained embedded designs. |
| INL / DNL | ±0.5 LSB max each - ensures linearity critical for closed-loop control feedback and precision measurement. |
| Aperture Jitter | 18 ps typ - limits SNR degradation at high input frequencies, directly impacting effective resolution. |
Pinout & Package
AD7273BUJZ-500RL7 is housed in an 8-lead TSOT (Thin Small Outline Transistor) package - 3.0 mm × 1.7 mm × 0.8 mm body, 0.5 mm pitch, exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | Single 2.35 V–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 MSB-first stream: two leading zeros + 10-bit result + four trailing zeros. |
| CS (Pin 7) | Chip select / conversion trigger | Active-low input that initiates sampling on falling edge and frames serial data transfer; minimum pulse width = 3 ns. |
| AGND (Pin 8) | Analog ground reference | Common return for VIN, VREF, and internal analog circuitry; must be tied to DGND at single point with ≤0.3 V potential difference. |
| VREF (Pin 5) | External reference input | Accepts 1.4 V–VDD reference; requires 10 μF capacitor to AGND to stabilize reference impedance and reduce noise coupling. |
| SCLK (Pin 6) | Serial clock input | Drives both data readout and internal conversion timing; supports 500 kHz–48 MHz; 40/60 mark/space ratio required. |
| DGND (Pin 3) | Digital ground reference | Return path for SDATA, CS, and SCLK; separation from AGND affects digital switching noise injection into analog domain. |
| VIN (Pin 4) | Analog input channel | Single-ended input with 0–VREF range; 42 pF input capacitance in track mode imposes source impedance limitations (<100 Ω recommended). |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic latency (≤291 ns) for real-time control loops without output buffering or timing compensation. |
| Flexible power management | Three distinct power states allow dynamic adaptation: full operation (3.2 mA), partial shutdown (34 μA), and deep sleep (0.1 μA). |
| Wide VREF range (1.4 V to VDD) | Permits use of low-noise external references or direct connection to regulated supply, maximizing dynamic range flexibility. |
| High-speed serial interface | 48 MHz SCLK support enables 3.45 MSPS throughput while maintaining SPI/QSPI/MICROWIRE/DSP compatibility. |
| Industrial temperature range | Specified from −40°C to +125°C ensures reliable operation in motor drives, power inverters, and harsh-environment monitoring. |
Applications
| Motor Phase Current Sensing | Isolated Voltage Monitoring |
|---|---|
|
Use Scenario: Real-time sampling of shunt-based phase currents in 3-phase BLDC or PMSM inverters with <1 μs latency requirements. IC Role / Device Role / Timing Role: High-speed analog front-end digitizer interfacing directly to isolated gate drivers and PWM controllers via SPI. Use Value: 74 MHz full-power bandwidth captures current slew rates up to 10 A/μs; ±0.5 LSB INL ensures accurate torque estimation and overcurrent protection thresholds. |
Use Scenario: Digitizing scaled DC bus voltage in isolated DC-DC converters or solar microinverters using resistive dividers and optocoupler feedback. IC Role / Device Role / Timing Role: Precision reference-referred ADC accepting buffered, filtered analog inputs from isolation amplifiers or voltage dividers. Use Value: 61 dB SINAD at 1 MHz enables accurate RMS calculation of ripple-rich DC bus waveforms; 1.4–3.6 V VREF range accommodates common isolated reference voltages (2.5 V, 3.0 V). |
| Portable Instrumentation Front-End | Condition Monitoring Sensor Hub |
|
Use Scenario: Battery-powered handheld oscilloscopes or multimeters requiring >3 MSPS sampling with <10 mW total analog front-end power. IC Role / Device Role / Timing Role: Core ADC in compact signal chain with integrated track-and-hold, eliminating need for external sample-hold circuitry. Use Value: 9.6 mW typical power at 3 V enables >10-hour runtime on 3.7 V Li-ion; TSOT package (3.0 × 1.7 mm) minimizes PCB area in space-constrained enclosures. |
Use Scenario: Multi-channel vibration/temperature/acoustic sensing node aggregating data from MEMS accelerometers and RTDs before wireless transmission. IC Role / Device Role / Timing Role: Low-latency, low-power ADC servicing multiple analog sensors via multiplexer, synchronized to system wake-up timer. Use Value: Full power-down mode (0.1 μA) extends node lifetime between acquisitions; 18 ps aperture jitter preserves spectral integrity for FFT-based fault detection algorithms. |
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 | 12-bit resolution, 3 MSPS max, same 8-lead MSOP/TSOT footprint, identical timing and interface logic. | Higher resolution required for precision metrology or calibration equipment where 10-bit quantization noise is insufficient. | Select AD7274BRMZ-REEL when ≥12-bit ENOB is mandatory and 3 MSPS throughput meets system timing budget. |
| ADS7822U | 12-bit, 200 kSPS max, 8-lead SOIC, SPI interface, 2.7–5.25 V supply, no external VREF required (internal 2.5 V ref). | Lower speed but simpler BOM (no external reference), suited for non-critical industrial I/O modules or PLC analog inputs. | Choose ADS7822U for cost-sensitive, lower-throughput applications where board space and design simplicity outweigh speed needs. |
Compared with AD7273BUJZ-500RL7, AD7274BRMZ-REEL trades throughput margin (−0.45 MSPS) for 2 extra bits of resolution and identical package compatibility, while ADS7822U sacrifices speed and external reference flexibility for integration and supply voltage headroom - making each suitable for distinct latency, accuracy, and system-level trade-offs.
Availability
AD7273BUJZ-500RL7 is available at Aetrix Electronics and suitable for industrial motor control, portable test equipment, and condition monitoring systems requiring stable component supply, extended temperature operation, and verified high-speed analog performance.
Supply support for AD7273BUJZ-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7273/AD7274 product line was designed specifically for space-constrained, power-sensitive applications demanding high-speed, low-latency digitization - such as real-time control, portable instrumentation, and distributed sensor networks.
FAQ
What is the maximum sampling rate supported by the AD7273BUJZ-500RL7?
The AD7273BUJZ-500RL7 achieves a maximum throughput rate of 3.45 MSPS when operated with a 48 MHz SCLK and 12 SCLK cycles per conversion. This corresponds to a minimum conversion time of 250 ns and requires strict adherence to timing parameters including t2 (6 ns CS-to-SCLK setup) and tQUIET (4 ns minimum quiet time).
Does the AD7273BUJZ-500RL7 require an external voltage reference?
Yes, the AD7273BUJZ-500RL7 requires an external reference applied to the VREF pin. The specified input range is 1.4 V to VDD, and a 10 μF capacitor must be placed between VREF and AGND to ensure stability and low-noise operation. No internal reference is provided.
What are the power consumption characteristics of the AD7273BUJZ-500RL7 in different operating modes?
In normal operational mode at 3 V and 3 MSPS, the AD7273BUJZ-500RL7 draws 3.2 mA typical (9.6 mW). In partial power-down mode, it consumes 34 μA typical, and in full power-down mode, it draws just 0.1 μA typical - enabling ultra-low-power wake-on-event architectures.
Can the AD7273BUJZ-500RL7 interface directly with a microcontroller SPI port?
Yes, the AD7273BUJZ-500RL7 is fully compatible with standard SPI, QSPI, MICROWIRE, and DSP serial interfaces. Its SDATA output is three-state, CS serves as frame synchronization, and SCLK clocks data on the falling edge - matching common MCU SPI master configurations without level-shifting or protocol translation.
What is the analog input voltage range and input impedance of the AD7273BUJZ-500RL7?
The analog input (VIN) accepts a single-ended 0 V to VREF range. Input capacitance is 42 pF in track mode and 10 pF in hold mode. DC leakage is ±1 μA (−40°C to +85°C), and source impedance should be kept below 100 Ω to maintain specified THD and SNR performance per Figure 15.
AD7273BUJZ-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:
- 10
- 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:
- -
AD7273BUJZ-500RL7 FAQ
1.How can I place an order for AD7273BUJZ-500RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7273BUJZ-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 AD7273BUJZ-500RL7 reliable?
The price and inventory of AD7273BUJZ-500RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7273BUJZ-500RL7 is usually 5 days.
3.What payment methods are accepted for AD7273BUJZ-500RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7273BUJZ-500RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7273BUJZ-500RL7?
AD7273BUJZ-500RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7273BUJZ-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 AD7273BUJZ-500RL7?
For technical support, including AD7273BUJZ-500RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7273BUJZ-500RL7 requirements.
6.How does Aetrix verify that AD7273BUJZ-500RL7 is sourced from the original manufacturer or authorized distributors?
All AD7273BUJZ-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 AD7273BUJZ-500RL7 meets industry standards.
7.What is the process for return or replacement of AD7273BUJZ-500RL7?
All AD7273BUJZ-500RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7273BUJZ-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 AD7273BUJZ-500RL7 part is unused and in its original packaging.
Return procedure for AD7273BUJZ-500RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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