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Analog Devices Inc. AD7477AAKSZ-REEL7
- Part No.:
- AD7477AAKSZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
AD7477AAKSZ-REEL7.pdf
- Description:
- IC ADC 10BIT 1MSPS LP SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,452
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Product details
Overview
AD7477AAKSZ-REEL7 from Analog Devices is a 10-bit, 1 MSPS successive-approximation analog-to-digital converter (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 at 100 kHz (typical), and features no pipeline delay with sampling controlled by CS falling edge. It serves as a high-speed, low-power front-end ADC in portable medical sensors and battery-powered instrumentation.
For engineers reviewing the AD7477AAKSZ-REEL7 datasheet, AD7477AAKSZ-REEL7 pinout, AD7477AAKSZ-REEL7 application, or AD7477AAKSZ-REEL7 equivalent, key selection considerations include its 10-bit resolution, 1 MSPS throughput, SC70 footprint, SPI/QSPI/MICROWIRE-compatible serial interface, and internal VDD-referenced input range (0 V to VDD).
Technical Context
The AD7477AAKSZ-REEL7 implements a standard successive-approximation register (SAR) architecture with integrated track-and-hold, enabling precise sampling control via the CS input and eliminating pipeline latency. Its conversion timing is fully synchronous to SCLK, requiring exactly 14 clock cycles per conversion at 20 MHz.
It uses an internal reference derived from VDD, establishing a 0 V to VDD unipolar input range and simplifying system-level signal conditioning. The device supports flexible power management through a dedicated standby mode drawing ≤1 µA, and its digital I/Os are compatible with 2.35 V–5.25 V logic levels including 1.8 V minimum VINH at low VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - Delivers 1,024 discrete output codes for medium-precision data acquisition. |
| Throughput Rate | 1 MSPS - Enables real-time sampling of signals up to ~400 kHz (Nyquist-limited) without oversampling penalty. |
| SINAD | 61 dB min at 100 kHz - Supports dynamic range >60 dB for audio-band and sensor signal digitization. |
| Power Dissipation | 5.1 mW max at 3 V / 1 MSPS - Enables integration into ultra-low-power portable systems with tight thermal budgets. |
| Input Range | 0 V to VDD - Eliminates external level-shifting circuitry when interfacing with single-supply analog front-ends. |
| Standby Current | 1 µA max - Allows rapid wake-up from deep sleep while minimizing quiescent drain in duty-cycled applications. |
| Package | 6-lead SC70 (2.0 mm × 1.25 mm) - Provides minimal PCB area occupancy for space-constrained handheld devices. |
Pinout & Package
AD7477AAKSZ-REEL7 is housed in a 6-lead SC70 package (JEDEC MO-203AA), measuring 2.0 mm × 1.25 mm × 0.9 mm, with gull-wing leads and Pb-free finish compliant with RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Power supply input | Accepts 2.35 V–5.25 V; supplies core logic, reference, and analog circuitry - must be decoupled locally with 100 nF ceramic capacitor. |
| 2 (GND) | Analog ground reference | Single-point return for all analog signals and internal ADC circuitry - requires dedicated low-impedance connection to system AGND plane. |
| 3 (VIN) | Analog input channel | Single-ended input with 0 V to VDD range and 20 pF input capacitance - optimized for source impedances ≤1 kΩ to maintain DC accuracy. |
| 4 (CS) | Chip select / conversion trigger | Active-low input that initiates sampling on falling edge and frames serial data transfer - enables multi-device SPI bus sharing. |
| 5 (SDATA) | Serial data output | Three-state CMOS output delivering 10-bit result MSB-first, prefixed by four leading zeros - transitions on SCLK falling edge. |
| 6 (SCLK) | Serial clock input | Drives both data transfer and internal conversion timing; supports 10 kHz–20 MHz operation - determines conversion time (14 × tSCLK). |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture ensures deterministic 14-cycle conversion latency and immediate data availability after CS assertion. |
| VDD-referenced internal reference | Eliminates need for external reference IC or resistor divider, reducing BOM count and layout complexity in single-supply systems. |
| SPI/QSPI/MICROWIRE/DSP compatibility | Enables direct connection to common microcontrollers (e.g., STM32, TMS320C54x, ADSP-2181) without protocol translation logic. |
| Low-power standby mode | 1 µA max current draw allows seamless integration into energy-harvesting or coin-cell-powered designs with intermittent sampling. |
| Wide supply voltage range | Operates from 2.35 V to 5.25 V - supports direct interfacing with Li-ion, Li-Po, and 3.3 V/5 V system rails without LDO regulation. |
Applications
| Portable Medical Sensors | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Digitizing ECG lead signals or temperature transducer outputs in handheld diagnostic tools. IC Role / Device Role / Timing Role: Front-end ADC capturing analog biosignals at up to 1 MSPS with minimal power consumption between measurements. Use Value: 10-bit resolution and 61 dB SINAD meet clinical-grade signal fidelity requirements while 1 µA standby current extends battery life beyond 12 months on a CR2032 cell. |
Use Scenario: Sampling voltage, current, and environmental parameters in field-deployable data loggers. IC Role / Device Role / Timing Role: Precision analog input interface synchronizing with microcontroller-triggered acquisition bursts. Use Value: SC70 footprint minimizes PCB area in compact enclosures, and VDD-referenced input eliminates external reference components, reducing total solution cost by ~$0.18. |
| Optical Sensor Interfaces | Mobile Communication Front-Ends |
Use Scenario: Converting photodiode or ambient light sensor outputs in smartphone proximity/ALS modules. IC Role / Device Role / Timing Role: Low-latency ADC sampling fast transient optical events with precise CS-controlled timing. Use Value: 100 kHz full-power bandwidth and 10 ns aperture delay ensure accurate capture of rapid light intensity changes during gesture recognition. |
Use Scenario: Monitoring RF power amplifier bias voltages and temperature feedback in LTE/Wi-Fi transceivers. IC Role / Device Role / Timing Role: High-speed auxiliary ADC supporting closed-loop calibration and thermal management routines. Use Value: 1 MSPS throughput enables sub-microsecond response to PA thermal drift, improving transmit efficiency stability across operating temperature ranges. |
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 |
|---|---|---|---|
| AD7477ARMZ | Same die, 8-lead MSOP package (3 mm × 3 mm); identical electrical specs and timing. | Requires larger PCB area and different layout; lacks SC70's ultra-compact footprint. | Select AD7477ARMZ only if MSOP handling or thermal performance (θJA = 205.9°C/W vs. SC70's 340.2°C/W) is prioritized over size. |
| ADS7822U | 12-bit, 200 kSPS, 8-lead SOIC; higher resolution but lower speed and larger package. | Not suitable for 1 MSPS applications; better for precision DC measurements than dynamic signal capture. | Choose ADS7822U only when resolution >10 bits is mandatory and throughput <200 kSPS is acceptable. |
Compared with AD7477ARMZ, AD7477AAKSZ-REEL7 saves >70% board area and improves thermal resistance margin in sealed enclosures; compared with ADS7822U, it delivers 5× higher throughput at the cost of 2-bit resolution - making it optimal for bandwidth-constrained portable systems where speed and size dominate.
Availability
AD7477AAKSZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical sensors, optical sensor interfaces, and mobile communication front-ends requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for AD7477AAKSZ-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, 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 - specifically targeting space- and power-constrained portable and battery-operated systems.
FAQ
What is the maximum sampling rate supported by the AD7477AAKSZ-REEL7?
The AD7477AAKSZ-REEL7 supports a maximum throughput rate of 1 MSPS, achieved with a 20 MHz SCLK and 14 serial clock cycles per conversion. At lower SCLK frequencies, the effective sampling rate scales linearly - for example, 5 MHz SCLK yields ~357 kSPS. This fixed 14-cycle timing ensures predictable latency critical for real-time control loops.
Does the AD7477AAKSZ-REEL7 require an external reference voltage?
No, the AD7477AAKSZ-REEL7 uses an internal reference derived from the VDD supply, establishing a 0 V to VDD unipolar input range. This eliminates the need for external reference ICs or resistive dividers, simplifying design and reducing component count. Accuracy remains within ±1 LSB gain error across the 2.35 V–5.25 V VDD range.
What digital interface protocols does the AD7477AAKSZ-REEL7 support?
The AD7477AAKSZ-REEL7 supports SPI, QSPI, MICROWIRE, and DSP-compatible serial interfaces. Its SDATA output is three-state and synchronized to the falling edge of SCLK, while CS acts as both frame synchronization and conversion trigger - enabling seamless integration with microcontrollers including STM32, TMS320C54x, and ADSP-2181 families.
What is the input voltage range specification for the AD7477AAKSZ-REEL7?
The AD7477AAKSZ-REEL7 has a single-ended analog input range of 0 V to VDD, with absolute maximum ratings of −0.3 V to VDD + 0.3 V. This VDD-referenced architecture allows direct interfacing with sensors and amplifiers operating from the same supply rail, avoiding level-shifting circuitry and associated errors in compact, single-supply systems.
How does the power consumption of the AD7477AAKSZ-REEL7 vary with supply voltage and throughput?
At 1 MSPS, AD7477AAKSZ-REEL7 draws 1.7 mA max at 2.35 V–3.6 V (5.1 mW) and 3.5 mA max at 4.75 V–5.25 V (17.5 mW). In full power-down mode, it consumes ≤1 µA - dropping to ~50 nA typical. Power scales linearly with throughput, allowing dynamic adjustment via SCLK frequency to optimize energy-per-sample in burst-mode applications.
AD7477AAKSZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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:
- SC-70-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7477AAKSZ-REEL7 FAQ
1.How can I place an order for AD7477AAKSZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7477AAKSZ-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 AD7477AAKSZ-REEL7 reliable?
The price and inventory of AD7477AAKSZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7477AAKSZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7477AAKSZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7477AAKSZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7477AAKSZ-REEL7?
AD7477AAKSZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7477AAKSZ-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 AD7477AAKSZ-REEL7?
For technical support, including AD7477AAKSZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7477AAKSZ-REEL7 requirements.
6.How does Aetrix verify that AD7477AAKSZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7477AAKSZ-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 AD7477AAKSZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7477AAKSZ-REEL7?
All AD7477AAKSZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7477AAKSZ-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 AD7477AAKSZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7477AAKSZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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