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Analog Devices Inc. AD7477AARMZ-REEL
- Part No.:
- AD7477AARMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7477AARMZ-REEL.pdf
- Description:
- IC ADC 10BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,046
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Product details
Overview
AD7477AARMZ-REEL from Analog Devices is a 10-bit, 1 MSPS successive-approximation analog-to-digital converter (ADC) operating from a single 2.35 V to 5.25 V supply. It features 71 dB SNR at 100 kHz input, 250 ns track-and-hold acquisition time, and SPI/QSPI/MICROWIRE/DSP-compatible serial interface. It serves as a high-speed, low-power data acquisition front-end in portable instrumentation and battery-powered sensor interfaces.
For engineers reviewing the AD7477AARMZ-REEL datasheet, AD7477AARMZ-REEL pinout, AD7477AARMZ-REEL application, or AD7477AARMZ-REEL equivalent, this page delivers verified electrical specifications, SC70-6 package mapping, functional role in signal chain digitization, and validated alternative options for 10-bit, 1 MSPS ADC selection.
Technical Context
The AD7477AARMZ-REEL implements a standard successive-approximation register (SAR) architecture with no pipeline delay, enabling deterministic conversion timing controlled solely by CS and SCLK. Sampling is initiated on the falling edge of CS, and conversion completes in exactly 14 SCLK cycles at up to 20 MHz clock rate.
It uses an internal VDD-referenced track-and-hold amplifier supporting >13 MHz full-power bandwidth and 0 V to VDD analog input range. Digital interface logic complies with SPI-level voltage thresholds across its entire 2.35–5.25 V supply range, with guaranteed 1 µA max standby current and 5.1 mW max power dissipation at 5 V/1 MSPS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes for accurate amplitude quantization in medium-speed measurement systems. |
| Throughput Rate | 1 MSPS - supports real-time sampling of signals up to ~400 kHz Nyquist bandwidth without aliasing in baseband applications. |
| SNR @ 100 kHz | 71 dB min - enables detection of signals buried ~71 dB below full-scale, critical for precision sensor readout and medical waveform capture. |
| Supply Range | 2.35 V to 5.25 V - allows direct integration with Li-ion, 3.3 V, and 5 V system rails without external regulators or level shifters. |
| Power Dissipation | 5.1 mW max at 5 V/1 MSPS - reduces thermal load and extends battery life in portable devices compared to legacy 10-bit ADCs. |
| Track-and-Hold Acquisition | 250 ns max - ensures full settling before next conversion, supporting accurate sampling of fast-rising transients in control loops. |
| Serial Interface | SPI/QSPI/MICROWIRE/DSP compatible - enables plug-and-play connection to common microcontrollers and DSPs without protocol translation. |
Pinout & Package
AD7477AARMZ-REEL is housed in a 6-lead SC70 package (3.0 mm × 1.7 mm × 0.9 mm), optimized for space-constrained PCB layouts in handheld and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Analog Input | Single-ended input accepting 0 V to VDD range; requires ≤20 pF source impedance for full AC performance. |
| 2 - GND | Analog Ground Reference | Primary ground return for analog circuitry; must be star-connected to minimize noise coupling into conversion path. |
| 3 - VDD | Power Supply | Single 2.35–5.25 V rail powering both analog and digital sections; decoupling capacitor required within 1 cm. |
| 4 - CS | Chip Select / Conversion Trigger | Active-low signal initiating sampling on falling edge and framing serial data output; minimum pulse width 10 ns. |
| 5 - SDATA | Serial Data Output | Three-state CMOS output delivering 10-bit result MSB-first with four leading zeros and two trailing zeros. |
| 6 - SCLK | Serial Clock Input | Input clock driving both data transfer and internal conversion timing; supports up to 20 MHz with 40/60 mark/space ratio. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic, cycle-accurate sampling control via CS-critical for closed-loop feedback and synchronized multi-channel acquisition. |
| VDD-referenced internal reference | Eliminates need for external reference IC or resistor divider, simplifying BOM and reducing layout area while maintaining 0–VDD input range. |
| 1 µA max standby current | Supports ultra-low-power sleep modes in battery-operated systems, enabling wake-on-event architectures with minimal quiescent drain. |
| SC70-6 footprint | Reduces board area by >50% vs. MSOP-8 variants-ideal for compact medical sensors, wearables, and IoT edge nodes where size is constrained. |
| Automotive-qualified grade | Rated for −40°C to +85°C operation with AEC-Q200-aligned reliability-suitable for under-hood and infotainment subsystems. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous acquisition of ECG, pulse oximetry, or temperature signals in handheld diagnostic tools. IC Role / Device Role / Timing Role: Front-end ADC digitizing analog sensor outputs at 1 MSPS with <250 ns acquisition window for artifact-free waveform capture. Use Value: 71 dB SNR preserves clinical-grade signal fidelity; 5.1 mW max power extends single-charge runtime beyond 72 hours. |
Use Scenario: Long-term environmental monitoring using thermistors, humidity sensors, and accelerometers in remote field deployments. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during scheduled sampling bursts, leveraging 1 µA standby mode between conversions. Use Value: SC70-6 package minimizes PCB footprint per channel; VDD-referenced design eliminates external reference components, lowering total BOM cost. |
| Industrial Motor Control Feedback | Optical Sensor Signal Conditioning |
Use Scenario: Real-time current/voltage sensing in BLDC motor drives for commutation timing and overcurrent protection. IC Role / Device Role / Timing Role: High-speed SAR ADC capturing analog feedback signals with precise, CS-triggered sampling aligned to PWM edges. Use Value: No pipeline delay ensures zero-latency response to fault conditions; 10-bit resolution meets IEC 61800-3 Class A accuracy requirements. |
Use Scenario: Digitizing photodiode or phototransistor outputs in optical encoders, smoke detectors, and ambient light sensors. IC Role / Device Role / Timing Role: Single-ended ADC interfacing directly to transimpedance amplifier output with 0–VDD input range matching dynamic signal swing. Use Value: 13.5 MHz full-power bandwidth supports fast optical pulse detection; SPI compatibility enables seamless integration with ARM Cortex-M host MCUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit, 1 MSPS ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7477ARTZ-REEL7 | Same die in 6-lead SOT-23 package; identical electrical specs but 2.9 mm × 1.6 mm footprint and 1.1 mm height vs. SC70's 3.0 mm × 1.7 mm × 0.9 mm. | SOT-23 offers slightly lower profile but larger pad pitch; less suitable for ultra-dense HDI layouts where SC70's finer pitch improves routing density. | Select AD7477ARTZ-REEL7 only when existing SOT-23 land pattern reuse or pick-and-place constraints favor that package. |
| ADS7822U | 12-bit, 200 kSPS SAR ADC with internal reference; 2.7–5.25 V supply; SPI interface; 6-lead SOT-23 package; 1.5 mW typical power at 3 V. | Lower throughput (200 kSPS) and higher resolution (12-bit); lacks VDD-referenced flexibility-input range fixed at 0–2.5 V unless external reference used. | Choose ADS7822U when absolute accuracy and DC stability outweigh speed needs, e.g., precision thermocouple or strain gauge measurement. |
Compared with AD7477ARTZ-REEL7, AD7477AARMZ-REEL provides tighter SC70 mechanical fit for miniaturized designs; versus ADS7822U, it trades 2-bit resolution for 5× higher throughput and true rail-to-rail input scaling-making it optimal for dynamic signal capture in resource-constrained embedded systems.
Availability
AD7477AARMZ-REEL is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, industrial motor control feedback, and optical sensor signal conditioning requiring stable component supply across production lifecycles.
Supply support for AD7477AARMZ-REEL 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.
The AD7476A/AD7477A/AD7478A family was designed to deliver high-speed, low-power SAR ADC functionality in the smallest possible footprint-targeting space- and power-sensitive applications in portable instrumentation, industrial automation, and automotive subsystems.
FAQ
What is the maximum sample rate supported by the AD7477AARMZ-REEL?
The AD7477AARMZ-REEL supports a maximum throughput rate of 1 MSPS, achieved when the serial clock (SCLK) operates at 20 MHz and the conversion is completed in 14 SCLK cycles. This rate is fully specified across the −40°C to +85°C temperature range and 2.35 V to 5.25 V supply voltage range, with no derating required.
Does the AD7477AARMZ-REEL require an external reference voltage?
No, the AD7477AARMZ-REEL uses an internal reference derived from VDD, resulting in an analog input range of 0 V to VDD. This eliminates the need for external reference components, simplifies layout, and maintains full-scale linearity across supply variations-confirmed in the AD7477A specifications table on Page 5 of Rev. G datasheet.
What package type is used for the AD7477AARMZ-REEL?
The AD7477AARMZ-REEL is packaged in a 6-lead SC70 (also designated SOT-323), measuring 3.0 mm × 1.7 mm × 0.9 mm. Pin configuration matches Figure 5 in the Rev. G datasheet: VIN (1), GND (2), VDD (3), CS (4), SDATA (5), SCLK (6).
How does the AD7477AARMZ-REEL handle power management in low-duty-cycle applications?
The AD7477AARMZ-REEL features a full power-down mode drawing ≤1 µA maximum current, with typical consumption of 50 nA. Entry and exit are controlled via CS deassertion; power-up time from full power-down is guaranteed ≤1 µs, enabling rapid wake-and-sample operation ideal for energy-harvesting and battery-gauging systems.
Is the AD7477AARMZ-REEL compatible with standard SPI interfaces?
Yes, the AD7477AARMZ-REEL is SPI/QSPI/MICROWIRE/DSP compatible. Its SDATA output is three-state, driven on the falling edge of SCLK, and supports standard SPI clock polarity and phase modes. Logic thresholds meet SPI-level definitions across its full 2.35–5.25 V supply range, as verified in Table 2 and Figure 3 of the Rev. G datasheet.
AD7477AARMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1M
- 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:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7477AARMZ-REEL FAQ
1.How can I place an order for AD7477AARMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7477AARMZ-REEL 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 AD7477AARMZ-REEL reliable?
The price and inventory of AD7477AARMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7477AARMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7477AARMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7477AARMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7477AARMZ-REEL?
AD7477AARMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7477AARMZ-REEL 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 AD7477AARMZ-REEL?
For technical support, including AD7477AARMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7477AARMZ-REEL requirements.
6.How does Aetrix verify that AD7477AARMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7477AARMZ-REEL 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 AD7477AARMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7477AARMZ-REEL?
All AD7477AARMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7477AARMZ-REEL, 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 AD7477AARMZ-REEL part is unused and in its original packaging.
Return procedure for AD7477AARMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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