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Analog Devices Inc. AD7477AARM-REEL7
- Part No.:
- AD7477AARM-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7477AARM-REEL7.pdf
- Description:
- IC ADC 10BIT 1MSPS 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
AD7477AARM-REEL7 from Analog Devices is a 10-bit, 1 MSPS successive-approximation ADC in a 6-lead SC70 package, operating from 2.35 V to 5.25 V supply. It delivers 61 dB SINAD at 100 kHz input, 71 dB SNR (typ), and ±0.5 LSB INL/±0.5 LSB DNL, enabling high-fidelity signal digitization in space-constrained battery-powered instrumentation.
For engineers reviewing the AD7477AARM-REEL7 datasheet, AD7477AARM-REEL7 pinout, AD7477AARM-REEL7 application, or AD7477AARM-REEL7 equivalent, key selection considerations include its 1 MSPS throughput with no pipeline delay, SPI/QSPI/MICROWIRE/DSP-compatible serial interface, 250 ns track-and-hold acquisition time, and 1 µA max standby current - all critical for low-latency, low-power embedded data acquisition.
Technical Context
The AD7477AARM-REEL7 implements a standard successive-approximation register (SAR) architecture with a wide-bandwidth track-and-hold amplifier supporting >13 MHz full-power input bandwidth. Conversion is initiated on the falling edge of CS, and sampling is precisely controlled by that same edge - eliminating pipeline latency and ensuring deterministic timing.
It uses an internal VDD-referenced ADC core, yielding a 0 V to VDD analog input range and eliminating external reference components. Serial data output (SDATA) delivers 10-bit results MSB-first, prefixed by four leading zeros and followed by two trailing zeros, synchronized to SCLK falling edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - supports 1,024 discrete levels for medium-precision sensor and control loop digitization |
| Throughput Rate | 1 MSPS - enables real-time capture of signals up to ~400 kHz (Nyquist-limited) without oversampling penalty |
| SINAD @ 100 kHz | 61 dB min - defines usable dynamic range for audio-band and baseband communication signals |
| INL / DNL | ±0.5 LSB max each - guarantees monotonicity and no missing codes across full scale, essential for closed-loop control |
| Supply Range | 2.35 V to 5.25 V - interoperable with 3.3 V and 5 V logic domains and compatible with Li-ion (3.0–4.2 V) battery rails |
| Standby Current | 1 µA max - allows microamp-level sleep-state power budgeting in always-on portable systems |
| Track-and-Hold Acquisition | 250 ns max - ensures accurate sampling of fast transients without requiring external anti-aliasing complexity |
Pinout & Package
AD7477AARM-REEL7 is housed in a 6-lead SC70 package (2.0 mm × 1.25 mm, 0.9 mm height), optimized for ultra-compact PCB layouts in handheld and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Power Supply Input | Single 2.35–5.25 V rail powers analog and digital sections; also serves as internal reference source |
| 2 (GND) | Analog Ground | Common return for analog circuitry; must be star-connected to minimize noise coupling into VIN path |
| 3 (VIN) | Analog Input | Single-ended input with 0 V to VDD range; 20 pF input capacitance requires careful driver impedance matching |
| 4 (CS) | Chip Select | Active-low conversion trigger and serial frame sync; falling edge initiates sampling and conversion simultaneously |
| 5 (SDATA) | Serial Data Output | Three-state CMOS output delivering 14-bit frame (4 zeros + 10 data + 2 zeros) MSB-first on SCLK falling edges |
| 6 (SCLK) | Serial Clock | Input clock governing both conversion timing (14 cycles per sample) and data transfer; supports up to 20 MHz |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture ensures single-cycle latency: sample, convert, and output complete within one CS assertion |
| VDD-referenced conversion | Eliminates need for external voltage reference or level-shifting circuitry, reducing BOM count and layout area |
| Flexible serial interface | Native SPI/QSPI/MICROWIRE/DSP compatibility enables direct connection to common microcontrollers and DSPs |
| Ultra-low standby power | 1 µA max shutdown current extends battery life in intermittent-sampling applications like environmental monitors |
| Wide supply range | Operates down to 2.35 V, supporting direct integration with partially discharged lithium batteries without regulators |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous acquisition of ECG or temperature signals in handheld diagnostic devices powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Primary analog front-end digitizer, sampling biopotential waveforms at 1 MSPS with precise edge-triggered sampling via CS. Use Value: 10-bit resolution and 61 dB SINAD preserve clinical-grade waveform fidelity; 1 µA standby current enables multi-week operation on a single charge. |
Use Scenario: Periodic voltage/current monitoring in industrial asset trackers deployed in remote locations with solar or battery power. IC Role / Device Role / Timing Role: Low-power ADC interfacing with microcontroller ADC peripheral, activated only during scheduled measurement windows. Use Value: SC70 footprint minimizes PCB area; VDD-referenced design avoids external reference drift; 250 ns acquisition supports fast wake-up from deep sleep. |
| Optical Sensor Interfaces | Motor Control Feedback |
Use Scenario: Digitizing photodiode or ambient light sensor outputs in smart lighting or gesture recognition modules. IC Role / Device Role / Timing Role: High-speed, low-noise digitizer capturing rapid light-intensity changes, synchronized to system clock via SCLK. Use Value: 71 dB SNR (typ) at 100 kHz enables detection of subtle optical modulations; 13.5 MHz full-power bandwidth accommodates pulsed IR sensing. |
Use Scenario: Sampling current-sense amplifier outputs in BLDC motor drives for real-time phase current regulation. IC Role / Device Role / Timing Role: Deterministic-latency ADC providing timely feedback to PWM controller, triggered by hardware CS signal from timer peripheral. Use Value: No pipeline delay ensures current samples align exactly with commutation events; ±0.5 LSB DNL prevents torque ripple from code nonmonotonicity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7476AARMZ-REEL7 | 12-bit resolution, identical SC70-6 package, 70 dB SNR (min), higher 17.5 mW operational power at 5 V | Required where higher precision outweighs power/size constraints - e.g., calibration equipment or high-end sensors | Select when ≥12-bit linearity and 70+ dB SNR are mandatory; verify thermal dissipation in sealed enclosures |
| ADS7822U | 12-bit, 200 kSPS max, 8-pin SOIC, external reference required, 1.25 mW typical power at 3 V | Targeted at lower-speed, cost-sensitive industrial I/O modules where board space is less constrained | Choose for legacy designs using SOIC footprints or where external reference flexibility justifies slower throughput and larger size |
Compared with AD7477AARM-REEL7, AD7476AARMZ-REEL7 offers higher resolution but consumes more power and occupies identical board area, while ADS7822U trades speed and integration for lower cost and external reference control - making AD7477AARM-REEL7 optimal for compact, 1 MSPS, self-contained 10-bit acquisition.
Availability
AD7477AARM-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, optical sensors, and motor control feedback loops requiring stable component supply and long-term production continuity.
Supply support for AD7477AARM-REEL7 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 decades of expertise in precision data conversion.
The AD7476A/AD7477A/AD7478A family was designed specifically for ultra-compact, low-power, high-throughput data acquisition in portable and battery-operated systems - prioritizing minimal footprint, single-supply simplicity, and deterministic timing.
FAQ
What is the maximum sampling rate supported by the AD7477AARM-REEL7?
The AD7477AARM-REEL7 supports a maximum throughput rate of 1 MSPS, achieved with a 20 MHz SCLK and 14 serial clock cycles per conversion. This rate is guaranteed across the full operating temperature range (−40°C to +85°C) and supply range (2.35 V to 5.25 V), with no pipeline delay affecting timing predictability. The AD7477AARM-REEL7 maintains this performance while consuming only 5.1 mW at 5 V and 1 MSPS.
Does the AD7477AARM-REEL7 require an external voltage reference?
No, the AD7477AARM-REEL7 uses an internal reference derived from VDD, establishing a 0 V to VDD analog input range. This eliminates the need for external reference ICs or passive dividers, simplifying design and reducing component count. The reference tracking follows VDD variations, so accuracy depends on supply stability - typical INL remains ±0.5 LSB across the specified VDD range.
How does the serial interface of the AD7477AARM-REEL7 work?
The AD7477AARM-REEL7 uses a SPI-compatible 3-wire serial interface (CS, SCLK, SDATA). Conversion starts on the falling edge of CS, and 14-bit frames (4 leading zeros + 10 data bits + 2 trailing zeros) are clocked out MSB-first on SCLK falling edges. It supports SPI, QSPI, MICROWIRE, and DSP protocols without mode configuration, and SDATA enters high-impedance state when CS is high.
What is the analog input bandwidth of the AD7477AARM-REEL7?
The AD7477AARM-REEL7 features a full-power bandwidth of 13.5 MHz (at −3 dB) and 2 MHz (at −0.1 dB), enabled by its integrated wideband track-and-hold amplifier. This allows accurate digitization of signals up to several megahertz when paired with appropriate front-end conditioning. The 250 ns track-and-hold acquisition time ensures settling within 0.5 LSB after conversion completion.
Is the AD7477AARM-REEL7 suitable for automotive applications?
The AD7477AARM-REEL7 is not qualified for automotive applications. While the broader AD7476A/AD7477A/AD7478A family includes Y-grade variants rated for −40°C to +125°C, the AD7477AARM-REEL7 is an A-grade part specified only for −40°C to +85°C operation and lacks AEC-Q200 qualification, automotive-grade screening, or PPAP documentation. For automotive use, consult the AD7477AYRMZ variant.
AD7477AARM-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- SPI, DSP
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7477AARM-REEL7 FAQ
1.How can I place an order for AD7477AARM-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7477AARM-REEL7 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 AD7477AARM-REEL7 reliable?
The price and inventory of AD7477AARM-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7477AARM-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7477AARM-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7477AARM-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7477AARM-REEL7?
AD7477AARM-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7477AARM-REEL7 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 AD7477AARM-REEL7?
For technical support, including AD7477AARM-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7477AARM-REEL7 requirements.
6.How does Aetrix verify that AD7477AARM-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7477AARM-REEL7 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 AD7477AARM-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7477AARM-REEL7?
All AD7477AARM-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7477AARM-REEL7, 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 AD7477AARM-REEL7 part is unused and in its original packaging.
Return procedure for AD7477AARM-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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