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Analog Devices Inc. AD7477AARM-REEL
- Part No.:
- AD7477AARM-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7477AARM-REEL.pdf
- Description:
- IC ADC 10BIT 1MSPS 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
AD7477AARM-REEL 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 integral nonlinearity, serving as a precision analog front-end for portable instrumentation and battery-powered data acquisition.
For engineers reviewing the AD7477AARM-REEL datasheet, AD7477AARM-REEL pinout, AD7477AARM-REEL application, or AD7477AARM-REEL equivalent, this page provides verified electrical specs, SC70 package mapping, SPI-compatible serial interface timing, power-down mode behavior (1 µA max), and validated alternative options for 10-bit, 1 MSPS sampling in space-constrained designs.
Technical Context
The AD7477AARM-REEL implements a single-ended, track-and-hold-based SAR architecture with no pipeline delay. Conversion is initiated on the falling edge of CS, and data is clocked out MSB-first on SDATA synchronized to SCLK falling edges - requiring 14 SCLK cycles per conversion at 20 MHz.
It uses an internal VDD-referenced ADC core, enabling a full-scale input range of 0 V to VDD. The device supports flexible throughput scaling via SCLK frequency adjustment and enters a 1 µA standby state when CS remains high, making it suitable for burst-mode sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes with guaranteed no missing codes. |
| Throughput Rate | 1 MSPS maximum - supports real-time sampling of signals up to ~200 kHz Nyquist bandwidth. |
| SINAD | 61 dB min at 100 kHz input - defines usable dynamic range for medium-fidelity signal digitization. |
| INL / DNL | ±0.5 LSB max each - ensures monotonicity and linearity critical for closed-loop control feedback. |
| Supply Range | 2.35 V to 5.25 V - enables direct interfacing with 3.3 V and 5 V logic domains without level shifting. |
| Power (3 V / 1 MSPS) | 5.1 mW max - enables >100 kSPS operation from coin-cell or Li-ion sources with minimal thermal impact. |
| Standby Current | 1 µA max - allows microcontroller-gated sampling with sub-millisecond wake-up latency. |
Pinout & Package
AD7477AARM-REEL is housed in a 6-lead SC70 package (2.0 mm × 1.25 mm × 0.9 mm profile) with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Power Supply Input | Single 2.35–5.25 V rail powering analog core, reference, and digital interface; also serves as internal reference source. |
| 2 (GND) | Analog Ground Reference | Common return for VIN, internal T/H amplifier, and reference path; must be connected to low-noise analog ground plane. |
| 3 (VIN) | Analog Input Channel | Single-ended input with 0 V to VDD range; 20 pF input capacitance requires careful driver impedance matching. |
| 4 (CS) | Chip Select / Conversion Trigger | Active-low signal initiating sample acquisition on falling edge; also frames serial data transfer timing window. |
| 5 (SDATA) | Serial Data Output | Three-state CMOS output delivering 10-bit result MSB-first, preceded by four leading zeros and followed by two trailing zeros. |
| 6 (SCLK) | Serial Clock Input | Asynchronous clock controlling both conversion timing (14-cycle cycle) and data readout; supports up to 20 MHz. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True single-cycle conversion with deterministic latency - essential for time-critical control loops and trigger-based capture. |
| VDD-referenced architecture | Eliminates external reference component and layout complexity while maintaining 0 V to VDD input range. |
| SPI/QSPI/MICROWIRE/DSP compatibility | Direct interface to common microcontrollers without protocol translation or glue logic. |
| SC70 footprint | Smallest available package in the AD7476A/AD7477A/AD7478A family - reduces board area by >40% vs. MSOP variant. |
| 1 µA standby current | Enables ultra-low-power sleep states between measurements, extending battery life in portable medical or sensor nodes. |
Applications
| Portable Medical Sensors | Battery-Powered DAQ |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) analog front-end digitizing electrochemical sensor output. IC Role / Device Role / Timing Role: 10-bit SAR ADC acquiring low-bandwidth biosignals at 10–100 kSPS with precise DC accuracy. Use Value: ±0.5 LSB INL ensures reliable detection of sub-mV physiological changes; 5.1 mW @ 3 V enables >7-day operation on CR2032. |
Use Scenario: Handheld multimeter capturing voltage, current, and temperature readings in field service tools. IC Role / Device Role / Timing Role: Primary digitizer for multiplexed analog channels, triggered by microcontroller on demand. Use Value: 1 MSPS throughput allows oversampling for noise reduction; SC70 package fits compact handheld enclosure. |
| Optical Sensor Interface | Industrial Control Feedback |
Use Scenario: Ambient light sensor in smart lighting system measuring photodiode current via transimpedance amplifier. IC Role / Device Role / Timing Role: High-speed, low-noise ADC sampling TIA output with minimal gain error drift. Use Value: 71 dB SNR (typ) preserves dynamic range across 4-decade illumination range; VDD-referenced design simplifies supply chain. |
Use Scenario: Closed-loop motor current sensing in BLDC drive for overcurrent protection and torque regulation. IC Role / Device Role / Timing Role: Real-time current digitization feeding PWM controller with <1 µs latency. Use Value: No pipeline delay enables immediate fault response; 1 µA standby cuts quiescent power during idle periods. |
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 silicon die, 6-lead SOT-23 package - 0.95 mm taller, 0.3 mm wider than SC70; identical electrical specs. | Less space-efficient; requires larger pad layout and may limit routing density in ultra-thin devices. | Select only if SC70 assembly capability is unavailable; otherwise AD7477AARM-REEL offers superior board-area efficiency. |
| ADS7822U | 12-bit, 200 kSPS, 2.7–5.25 V supply; SPI interface but requires external reference; higher power (1.25 mW @ 3 V). | Lower throughput limits real-time control use; external reference adds BOM cost and layout sensitivity. | Choose only when 12-bit resolution outweighs speed and integration trade-offs; not drop-in compatible. |
Compared with AD7477ARTZ-REEL7, AD7477AARM-REEL saves 0.35 mm² PCB area and improves thermal resistance (θJA = 340°C/W vs. ~280°C/W). Against ADS7822U, it trades 2 bits of resolution for 5× higher throughput, integrated reference, and 4× lower active power - favoring speed-critical, space-constrained embedded systems.
Availability
AD7477AARM-REEL is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, optical sensors, and industrial control feedback requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for AD7477AARM-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, with design centers worldwide and ISO 9001-certified manufacturing.
AD7477AARM-REEL belongs to the AD7476A/AD7477A/AD7478A family - engineered for ultra-small-footprint, high-speed data acquisition in portable and energy-sensitive applications where SC70 packaging and VDD-referenced simplicity are critical.
FAQ
What is the maximum sampling rate supported by AD7477AARM-REEL?
AD7477AARM-REEL supports a maximum throughput rate of 1 MSPS, achieved with a 20 MHz SCLK and 14 SCLK cycles per conversion. At lower SCLK frequencies (e.g., 5 MHz), throughput scales linearly down to ~315 kSPS while maintaining full 10-bit accuracy and no pipeline delay - enabling flexible power-throughput trade-offs in battery-operated systems.
Does AD7477AARM-REEL require an external voltage reference?
No, AD7477AARM-REEL uses an internal reference derived from VDD, establishing a full-scale input range of 0 V to VDD. This eliminates the need for external reference components, reduces BOM count, and simplifies layout - though it means analog input accuracy tracks VDD stability and ripple, requiring clean, well-regulated supply filtering.
How does the serial interface of AD7477AARM-REEL operate?
AD7477AARM-REEL uses a SPI-compatible 3-wire serial interface (CS, SCLK, SDATA). Conversion starts on the falling edge of CS; 10-bit data is clocked out MSB-first on SDATA's falling SCLK edges, prefixed by four leading zeros and suffixed by two trailing zeros. The interface is compatible with standard SPI, QSPI, MICROWIRE, and DSP host controllers without protocol modification.
What is the power consumption of AD7477AARM-REEL at 3 V and 1 MSPS?
At 3 V supply and 1 MSPS throughput, AD7477AARM-REEL consumes a maximum of 1.7 mA (5.1 mW), with typical operational current around 1.2 mA. In full power-down mode (CS high), it draws ≤1 µA - enabling microcontroller-gated sampling strategies that reduce average power to nanowatt levels in intermittent-sensing applications.
Is AD7477AARM-REEL pin-compatible with other members of the AD7476A/AD7477A/AD7478A family?
Yes, AD7477AARM-REEL shares identical 6-lead SC70 pinout and interface timing with AD7476AARM-REEL (12-bit) and AD7478AARM-REEL (8-bit). All three variants use the same VDD/GND/VIN/CS/SDATA/SCLK assignment and require identical PCB footprints - allowing hardware reuse across resolution tiers during prototyping or product variant development.
AD7477AARM-REEL 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:
- -
- 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-REEL FAQ
1.How can I place an order for AD7477AARM-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7477AARM-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 AD7477AARM-REEL reliable?
The price and inventory of AD7477AARM-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7477AARM-REEL is usually 5 days.
3.What payment methods are accepted for AD7477AARM-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7477AARM-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7477AARM-REEL?
AD7477AARM-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7477AARM-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 AD7477AARM-REEL?
For technical support, including AD7477AARM-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7477AARM-REEL requirements.
6.How does Aetrix verify that AD7477AARM-REEL is sourced from the original manufacturer or authorized distributors?
All AD7477AARM-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 AD7477AARM-REEL meets industry standards.
7.What is the process for return or replacement of AD7477AARM-REEL?
All AD7477AARM-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7477AARM-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 AD7477AARM-REEL part is unused and in its original packaging.
Return procedure for AD7477AARM-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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