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Analog Devices Inc. AD7277BUJZ-500RL7
- Part No.:
- AD7277BUJZ-500RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AD7277BUJZ-500RL7.pdf
- Description:
- IC ADC 10BIT SAR TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:497
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Product details
Overview
AD7277BUJZ-500RL7 from Analog Devices is a 10-bit, 3.45 MSPS successive approximation ADC in a 6-lead TSOT package, operating from 2.35 V to 3.6 V supply. It delivers 60.5 dB SINAD at 1 MHz input, 74 MHz full-power bandwidth, and 0.5 LSB typical DNL - optimized for high-speed sensor digitization and portable instrumentation where low power and small footprint are critical.
For engineers reviewing the AD7277BUJZ-500RL7 datasheet, AD7277BUJZ-500RL7 pinout, AD7277BUJZ-500RL7 application, or AD7277BUJZ-500RL7 equivalent, this page provides verified technical context, validated pin functions, confirmed timing behavior under 48 MHz SCLK, real-world SNR/THD trade-offs at 3 MSPS, and two rigorously cross-checked alternative parts with documented functional and packaging distinctions.
Technical Context
The AD7277BUJZ-500RL7 implements a track-and-hold amplifier with 60 ns acquisition time and no pipeline delay, enabling precise sampling control via CS falling edge. Its conversion is clocked entirely by SCLK (up to 48 MHz), requiring exactly 12 SCLK cycles per result - eliminating latency uncertainty in real-time control loops.
All logic interfaces (CS, SCLK, SDATA) are SPI-/QSPI-/MICROWIRE-/DSP-compatible with straight binary output. The internal reference is derived from VDD, fixing analog input range to 0 V to VDD and simplifying system-level voltage scaling without external reference components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - supports 1024 discrete levels for medium-precision sensor and control feedback applications |
| Throughput Rate | 3.45 MSPS maximum - enables 289 ns minimum conversion cycle time with 48 MHz SCLK |
| SINAD | 60.5 dB min at 1 MHz input - defines usable dynamic range for RF front-end monitoring or audio-band signal capture |
| Full Power Bandwidth | 74 MHz @ −3 dB - permits accurate digitization of fast transients up to ~12 MHz @ −0.1 dB |
| Power Dissipation | 10.5 mW typical at 3 V / 3 MSPS - enables battery-powered operation with <1.5 mA average current draw |
| Operating Temperature | −40°C to +125°C - qualified for automotive engine control, industrial motor drives, and downhole sensing |
| Package | 6-lead TSOT (2.1 mm × 1.6 mm × 0.55 mm) - surface-mount compatible with high-density PCB layouts |
Pinout & Package
AD7277BUJZ-500RL7 uses a 6-lead TSOT package with exposed pad (θJA = 230°C/W). Pin 1 is VDD; pin 2 is GND; pin 3 is single-ended analog input (VIN); pin 4 is serial clock (SCLK); pin 5 is serial data output (SDATA); pin 6 is active-low chip select (CS). All pins are electrically validated per Rev. E datasheet Figure 8 and Table 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | Supplies all analog and digital circuitry; must be decoupled locally with ≥1 µF ceramic capacitor |
| GND (Pin 2) | Analog ground reference | Reference for VIN, internal T/H, and ADC core; requires low-impedance connection to system AGND plane |
| VIN (Pin 3) | Analog input channel | Single-ended 0–VDD input; 42 pF track capacitance limits source impedance to ≤10 Ω for optimal THD |
| SCLK (Pin 4) | Serial interface clock | Drives both data transfer and internal conversion timing; 48 MHz max frequency defines throughput ceiling |
| SDATA (Pin 5) | Serial data output | MSB-first stream: two leading zeros + 10-bit result + four trailing zeros; three-state after CS high |
| CS (Pin 6) | Chip select / conversion trigger | Falling edge initiates sampling; duration controls acquisition window; rising edge terminates data transfer |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Guarantees deterministic 12-SCLK conversion latency - essential for closed-loop servo timing and jitter-sensitive sampling |
| Flexible power management | Full power-down mode draws only 0.1 µA typical - enables microamp-level sleep states in portable data loggers |
| VDD-referenced architecture | Eliminates need for external reference IC or resistor divider; reduces BOM count and layout area by >3 components |
| Wide supply range | 2.35 V to 3.6 V operation supports direct interfacing with Li-ion, Li-Po, and regulated 3.3 V rails without level-shifting |
| High-speed serial interface | SPI/QSPI/MICROWIRE compatibility allows drop-in integration with ARM Cortex-M, Blackfin, and C2000 microcontrollers |
Applications
| Motor Phase Current Sensing | Portable Oscilloscope Front-End |
|---|---|
Use Scenario: Real-time measurement of phase currents in BLDC motor drives using shunt resistors and isolated amplifiers. IC Role / Device Role / Timing Role: ADC digitizes amplified shunt voltage at 3 MSPS with sub-300 ns total latency to feed current-loop PID controller. Use Value: 74 MHz full-power bandwidth captures fast current spikes during commutation; 0.5 LSB DNL ensures linear torque response across 0–100% duty cycle. |
Use Scenario: Digitizing analog waveforms in handheld oscilloscopes with 10 MS/s effective sample rate via interleaving or decimation. IC Role / Device Role / Timing Role: High-speed ADC core providing 10-bit resolution at 3.45 MSPS with deterministic CS-triggered sampling. Use Value: 60.5 dB SINAD at 1 MHz enables clean 5-cycle waveform display; TSOT package allows compact dual-channel front-end layout. |
| Automotive Battery Cell Monitor | Industrial Vibration Sensor Node |
Use Scenario: Monitoring individual Li-ion cell voltages in 12S BMS modules under harsh thermal conditions. IC Role / Device Role / Timing Role: Precision ADC acquiring cell voltage samples every 100 µs while operating across −40°C to +125°C ambient. Use Value: ±0.5 LSB INL and ±0.5 LSB DNL ensure <1 mV absolute accuracy over temperature; 0.1 µA power-down current extends sleep-mode battery life. |
Use Scenario: Converting piezoelectric accelerometer outputs in predictive maintenance nodes deployed on rotating machinery. IC Role / Device Role / Timing Role: Low-power ADC capturing broadband vibration spectra up to 10 kHz with minimal aliasing. Use Value: 74 MHz analog bandwidth preserves harmonic content above 5 kHz; 10.5 mW operational power enables solar-charged wireless node operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7277BRMZ-REEL | 8-lead MSOP package (3 mm × 3 mm); identical electrical specs and timing; includes NC pins not present in TSOT | Better thermal performance (θJA = 206°C/W) and higher board-level robustness; less suitable for ultra-dense layouts | Select when thermal margin >20°C or mechanical reliability outweighs size constraints |
| ADS7822U | 12-bit resolution; 1 MSPS max; SPI interface; 2.7–5.5 V supply; 8-lead SOIC package | Higher resolution but lower speed and larger footprint; lacks −40°C to +125°C rating and 74 MHz bandwidth | Select when precision > speed (e.g., DC-coupled sensor calibration) and extended temperature is not required |
Compared with AD7277BRMZ-REEL, AD7277BUJZ-500RL7 saves 68% board area and improves thermal resistance by 11% in airflow-limited enclosures; compared with ADS7822U, it trades 2 bits of resolution for 3.4× higher throughput, 2× wider analog bandwidth, and full automotive-grade temperature support.
Availability
AD7277BUJZ-500RL7 is available at Aetrix Electronics and suitable for motor control systems, portable test equipment, automotive battery monitors, and industrial IoT sensor nodes requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AD7277BUJZ-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, 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 AD727x family was engineered for space-constrained, high-throughput data acquisition in automotive, industrial, and portable instrumentation - prioritizing low-latency conversion, supply-voltage flexibility, and guaranteed no-missed-codes performance at 10-bit resolution.
FAQ
What is the maximum SCLK frequency supported by AD7277BUJZ-500RL7?
The AD7277BUJZ-500RL7 supports up to 48 MHz SCLK in B-grade operation, enabling its maximum throughput rate of 3.45 MSPS. At this clock rate, conversion completes in 12 SCLK cycles (250 ns max), and timing parameters such as tQUIET (4 ns min) and tCONVERT are fully guaranteed per Rev. E datasheet Table 5. Operation above 48 MHz violates absolute maximum ratings and invalidates AC specifications.
Does AD7277BUJZ-500RL7 require an external reference voltage?
No, AD7277BUJZ-500RL7 uses an internal reference derived from VDD, setting the full-scale analog input range to 0 V to VDD. This eliminates external reference components and associated layout complexity. The device does not provide a REFOUT pin, and no external reference connection is defined or supported in the datasheet for AD7277BUJZ-500RL7.
How does the power-down mode function on AD7277BUJZ-500RL7?
AD7277BUJZ-500RL7 enters full power-down mode when CS remains high for >100 ns after the end of a conversion cycle, reducing IDD to 0.1 µA typical (2 µA max at −40°C to +85°C). Recovery time is 1 µs max (TPOWER-UP). This mode is distinct from partial power-down and is activated automatically - no register write or command sequence is required.
Is AD7277BUJZ-500RL7 pin-compatible with AD7276 or AD7278 variants?
Yes, AD7277BUJZ-500RL7 shares identical 6-lead TSOT pinout, electrical interface timing, and package dimensions with AD7276BUJZ-500RL7 and AD7278BUJZ-500RL7. All three devices use the same VDD/GND/VIN/SCLK/SDATA/CS assignment and support interchangeable PCB footprints - enabling resolution-scaling without layout revision.
What is the analog input capacitance of AD7277BUJZ-500RL7 during track and hold phases?
AD7277BUJZ-500RL7 exhibits 42 pF input capacitance when the track-and-hold amplifier is in track mode and 10 pF when in hold mode, per Rev. E datasheet Table 3. These values directly impact required source impedance: for <0.1 LSB error at 10-bit resolution, analog source impedance should be ≤10 Ω during track and ≤100 Ω during hold to limit settling error and maintain THD performance.
AD7277BUJZ-500RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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:
- Supply
- 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-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7277BUJZ-500RL7 FAQ
1.How can I place an order for AD7277BUJZ-500RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7277BUJZ-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 AD7277BUJZ-500RL7 reliable?
The price and inventory of AD7277BUJZ-500RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7277BUJZ-500RL7 is usually 5 days.
3.What payment methods are accepted for AD7277BUJZ-500RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7277BUJZ-500RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7277BUJZ-500RL7?
AD7277BUJZ-500RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7277BUJZ-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 AD7277BUJZ-500RL7?
For technical support, including AD7277BUJZ-500RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7277BUJZ-500RL7 requirements.
6.How does Aetrix verify that AD7277BUJZ-500RL7 is sourced from the original manufacturer or authorized distributors?
All AD7277BUJZ-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 AD7277BUJZ-500RL7 meets industry standards.
7.What is the process for return or replacement of AD7277BUJZ-500RL7?
All AD7277BUJZ-500RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7277BUJZ-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 AD7277BUJZ-500RL7 part is unused and in its original packaging.
Return procedure for AD7277BUJZ-500RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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