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Analog Devices Inc. AD7477AAKSZ-REEL
- Part No.:
- AD7477AAKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
AD7477AAKSZ-REEL.pdf
- Description:
- IC ADC 10BIT SAR SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,934
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Product details
Overview
AD7477AAKSZ-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 high-speed, low-power analog front-end for portable instrumentation and battery-powered data acquisition.
For engineers reviewing the AD7477AAKSZ-REEL datasheet, AD7477AAKSZ-REEL pinout, AD7477AAKSZ-REEL application, or AD7477AAKSZ-REEL equivalent, key selection criteria include its 1 MSPS throughput with no pipeline delay, SPI/QSPI/MICROWIRE/DSP-compatible serial interface, 250 ns track-and-hold acquisition time, and internal VDD-referenced 0 V to VDD input range.
Technical Context
The AD7477AAKSZ-REEL implements a standard successive-approximation register (SAR) architecture with a wide-bandwidth track-and-hold amplifier supporting >13 MHz full-power bandwidth. Conversion is initiated on the falling edge of CS, and data is clocked out MSB-first on SDATA synchronized to SCLK falling edges.
It uses VDD as the internal reference source, eliminating external reference components and enabling rail-to-rail analog input (0 V to VDD). The device requires exactly 14 SCLK cycles per conversion at 1 MSPS, with no latency or pipelining - output data is valid within one serial frame after CS assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes over full-scale input range |
| Throughput Rate | 1 MSPS - supports real-time sampling of signals up to ~400 kHz Nyquist bandwidth |
| SINAD | 61 dB min at 100 kHz - defines usable dynamic range for medium-fidelity signal capture |
| INL | ±0.5 LSB max - ensures monotonicity and <0.05% end-point linearity error |
| Power @ 3 V / 1 MSPS | 5.1 mW max - enables operation in ultra-low-power systems with minimal thermal load |
| Track-and-Hold Acquisition | 250 ns max - allows accurate sampling of fast-rising analog transients without hold-mode settling penalty |
| Serial Interface | SPI/QSPI/MICROWIRE/DSP-compatible - interoperates with common microcontrollers without protocol translation |
Pinout & Package
AD7477AAKSZ-REEL is housed in a 6-lead SC70 package (2.0 mm × 1.25 mm, 0.9 mm height), optimized for space-constrained PCB layouts in portable electronics. Pin functions are validated per Analog Devices Rev. G datasheet Figure 5 and Table 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Single 2.35–5.25 V rail powers analog core, reference, and digital interface; also serves as ADC reference voltage |
| GND | Analog ground reference | Common return for analog input, internal T/H, and reference; must be isolated from noisy digital ground |
| VIN | Analog input channel | Single-ended input with 0 V to VDD range; 20 pF input capacitance requires careful driver impedance matching |
| CS | Chip select / conversion trigger | Active-low signal initiates sampling on falling edge and frames 14-bit serial data transfer (4 leading zeros + 10 data bits) |
| SDATA | Serial data output | Three-state CMOS output; drives MSB-first 14-bit frame on SCLK falling edges; high-impedance when CS high |
| SCLK | Serial clock input | Controls both conversion timing and data readout; 20 MHz max frequency enables 1 MSPS operation with 14-cycle cycle |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True single-cycle conversion: sampled data appears on SDATA within one complete SCLK frame after CS assertion |
| VDD-referenced architecture | Eliminates external reference IC and associated BOM cost, layout area, and drift sources |
| Flexible power management | 1 µA max standby current and dynamic power scaling via SCLK rate adjustment reduce average system power |
| Wide supply range | Operates from 2.35 V to 5.25 V - compatible with Li-ion, coin-cell, and 3.3/5 V logic rails without level-shifting |
| SC70 footprint | Smallest available package in the AD7476A/AD7477A/AD7478A family - saves >50% board area vs. MSOP variant |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous acquisition of ECG or pulse oximetry analog waveforms in handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary SAR ADC digitizing conditioned biopotential signals at 1 MSPS with minimal latency. Use Value: 61 dB SINAD preserves clinical-grade waveform fidelity; 5.1 mW power at 3 V extends battery life beyond 72 hours per charge. |
Use Scenario: Field-deployed environmental monitors capturing temperature, humidity, and pressure over extended periods. IC Role / Device Role / Timing Role: Low-power analog front-end ADC interfacing with microcontroller ADC peripherals via SPI. Use Value: 1 µA standby current enables multi-year operation on primary lithium cells; SC70 package minimizes PCB footprint. |
| Optical Sensor Interfaces | Industrial Control Signal Conditioning |
|
Use Scenario: Digitizing photodiode or ambient light sensor outputs in smart lighting and gesture recognition modules. IC Role / Device Role / Timing Role: High-speed, rail-to-rail input ADC accepting 0–3.3 V sensor outputs without external amplification. Use Value: Internal VDD reference eliminates need for precision external reference; 250 ns acquisition supports fast transient detection. |
Use Scenario: Monitoring analog feedback signals (e.g., motor current, voltage sense) in compact PLC I/O modules. IC Role / Device Role / Timing Role: Isolated analog input channel digitizing industrial sensor outputs with deterministic timing. Use Value: No pipeline delay ensures precise synchronization with control loop execution; SPI compatibility simplifies FPGA/microcontroller integration. |
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 silicon, 8-lead MSOP package - larger footprint, higher θJA (205.9°C/W vs. 340.2°C/W) | Preferred where hand-soldering or thermal margin is prioritized over board area | Select AD7477ARMZ if PCB assembly process lacks SC70 reflow capability or thermal dissipation is constrained |
| ADS7822U | 12-bit, 200 kSPS, 8-lead SOIC - lower speed, higher resolution, different serial framing (no leading zeros) | Suitable for precision but lower-throughput applications like sensor calibration or slow-motion monitoring | Choose ADS7822U only when resolution >10 bits is required and throughput ≤200 kSPS is acceptable |
Compared with AD7477ARMZ, AD7477AAKSZ-REEL saves >40% board area and offers superior thermal resistance in high-density layouts; versus ADS7822U, it trades 2-bit resolution for 5× higher throughput and native 1 MSPS deterministic timing - critical for real-time control loops.
Availability
AD7477AAKSZ-REEL is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and optical sensor interfaces requiring stable component supply across production lifecycles.
Supply support for AD7477AAKSZ-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 specifically for space- and power-constrained applications demanding high-speed, low-latency SAR conversion without external references or complex support circuitry.
FAQ
What is the maximum sample rate supported by the AD7477AAKSZ-REEL?
The AD7477AAKSZ-REEL supports a maximum throughput rate of 1 MSPS, achieved using a 20 MHz serial clock and completing conversion in 14 SCLK cycles. This rate is guaranteed across the full operating temperature range (−40°C to +85°C) and supply voltage range (2.35 V to 5.25 V), with no pipeline delay affecting timing determinism in the AD7477AAKSZ-REEL.
Does the AD7477AAKSZ-REEL require an external voltage reference?
No, the AD7477AAKSZ-REEL uses an internal reference derived from the VDD supply, enabling a 0 V to VDD analog input range without external reference components. This architecture reduces BOM count and layout complexity while maintaining 61 dB SINAD performance at 100 kHz - a key design feature confirmed in the AD7477AAKSZ-REEL datasheet Rev. G specifications table.
What serial interface protocols is the AD7477AAKSZ-REEL compatible with?
The AD7477AAKSZ-REEL supports SPI, QSPI, MICROWIRE, and DSP-compatible serial interfaces. Its SDATA output is driven on the falling edge of SCLK, and CS acts as both conversion trigger and frame sync - verified in the Functional Block Diagram and Timing Specifications sections of the AD7477AAKSZ-REEL datasheet Rev. G.
What is the power consumption of the AD7477AAKSZ-REEL at 3 V and 1 MSPS?
At 3 V supply and 1 MSPS throughput, the AD7477AAKSZ-REEL consumes a maximum of 5.1 mW (1.7 mA × 3 V), as specified in the Power Dissipation row of Table 2 in the AD7477AAKSZ-REEL datasheet Rev. G. In full power-down mode, it draws ≤1 µA - making it suitable for intermittent-sampling applications.
How does the AD7477AAKSZ-REEL handle analog input signal acquisition?
The AD7477AAKSZ-REEL uses a track-and-hold amplifier that samples the VIN signal on the falling edge of CS. Acquisition time is guaranteed ≤250 ns, and the device achieves full 10-bit accuracy without pipeline latency - confirmed in the General Description and Timing Specifications sections of the AD7477AAKSZ-REEL datasheet Rev. G.
AD7477AAKSZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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:
- SC-70-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7477AAKSZ-REEL FAQ
1.How can I place an order for AD7477AAKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7477AAKSZ-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 AD7477AAKSZ-REEL reliable?
The price and inventory of AD7477AAKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7477AAKSZ-REEL is usually 5 days.
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4.How is shipping managed for AD7477AAKSZ-REEL?
AD7477AAKSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7477AAKSZ-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 AD7477AAKSZ-REEL?
For technical support, including AD7477AAKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7477AAKSZ-REEL requirements.
6.How does Aetrix verify that AD7477AAKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7477AAKSZ-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 AD7477AAKSZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7477AAKSZ-REEL?
All AD7477AAKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7477AAKSZ-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 AD7477AAKSZ-REEL part is unused and in its original packaging.
Return procedure for AD7477AAKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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