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Analog Devices Inc. AD7477AARMZ
- Part No.:
- AD7477AARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7477AARMZ.pdf
- Description:
- IC ADC 10BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,549
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Product details
Overview
AD7477AARMZ 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 data acquisition in space-constrained battery-powered systems.
For engineers reviewing the AD7477AARMZ datasheet, AD7477AARMZ pinout, AD7477AARMZ application, or AD7477AARMZ equivalent, this page provides verified technical context, real-world use cases, validated alternatives, and supply-ready procurement details - all specific to the AD7477AARMZ variant with SC70 packaging and A-grade temperature range (–40°C to +85°C).
Technical Context
The AD7477AARMZ implements a single-ended, track-and-hold 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 up to 20 MHz.
It uses an internal VDD-referenced ADC core, yielding a 0 V to VDD analog input range. Its 13.5 MHz full-power bandwidth and 30 ps aperture jitter support accurate sampling of fast transients in instrumentation and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1,024 discrete output codes for medium-precision measurement applications. |
| Throughput Rate | 1 MSPS - supports real-time sampling of signals up to ~400 kHz Nyquist bandwidth. |
| SINAD | 61 dB min at 100 kHz - enables ≥9.8 ENOB for clean signal digitization in noisy environments. |
| INL / DNL | ±0.5 LSB max - guarantees monotonicity and no missing codes across full scale. |
| Supply Range | 2.35 V to 5.25 V - interoperable with 3.3 V and 5 V logic domains without level-shifting. |
| Power @ 1 MSPS | 5.1 mW max at 5 V / 3.6 mW max at 3 V - suitable for always-on sensing nodes with tight thermal budgets. |
| Standby Current | 1 µA max - enables rapid wake-up from ultra-low-power sleep states. |
Pinout & Package
AD7477AARMZ is housed in a 6-lead SC70 package (2.0 mm × 1.25 mm, 0.9 mm height), optimized for PCB area minimization in portable and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Analog Input | Single-ended input referenced to GND; accepts 0 V to VDD range with 20 pF input capacitance. |
| 2 - GND | Analog Ground | Primary reference for analog circuitry; must be connected to low-impedance system ground plane. |
| 3 - VDD | Power Supply | Single 2.35–5.25 V supply powering both analog and digital sections; decoupling required within 1 cm. |
| 4 - CS | Chip Select | Active-low control initiating conversion and framing serial output; minimum pulse width 10 ns. |
| 5 - SDATA | Serial Data Output | Three-state CMOS output delivering 4 leading zeros + 10-bit result + 2 trailing zeros, MSB first. |
| 6 - SCLK | Serial Clock Input | Drives conversion timing and data transfer; supports up to 20 MHz; controls throughput directly. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True one-shot conversion with deterministic latency - critical for closed-loop control timing predictability. |
| VDD-referenced internal reference | Eliminates external reference components and layout complexity while maintaining 0 V to VDD input range. |
| SPI/QSPI/MICROWIRE/DSP compatibility | Direct interface to common microcontrollers and DSPs without protocol translation or glue logic. |
| SC70 footprint | Smallest available package in the AD7476A/AD7477A/AD7478A family - reduces board area by >40% vs. MSOP. |
| 1 µA standby current | Enables microamp-level system sleep modes without sacrificing ADC readiness or calibration retention. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous ECG or temperature monitoring in handheld diagnostic devices with 24-hour battery life. IC Role / Device Role / Timing Role: Digitizes analog sensor outputs at 1 kSPS–1 MSPS with minimal power overhead and no external reference. Use Value: 10-bit resolution and 61 dB SINAD preserve clinical-grade waveform fidelity while 3.6 mW @ 3 V extends runtime between charges. |
Use Scenario: Environmental parameter logging (voltage, temp, humidity) in remote field sensors powered by coin cells. IC Role / Device Role / Timing Role: Performs burst-mode sampling triggered by wake-up events, then returns to 1 µA standby. Use Value: Ultra-low quiescent current and SC70 size enable compact, long-life deployments where PCB area and energy are constrained. |
| Industrial Sensor Signal Conditioning | Optical Sensor Interface |
Use Scenario: Front-end digitization for 4–20 mA loop receivers or RTD signal chains in factory automation modules. IC Role / Device Role / Timing Role: Converts conditioned analog signals with ±0.5 LSB linearity, supporting calibration-critical industrial accuracy. Use Value: Guaranteed no missing codes and monotonic transfer function ensure reliable linearization and error-free control decisions. |
Use Scenario: Reading photodiode or ambient light sensor outputs in smart lighting or display brightness control systems. IC Role / Device Role / Timing Role: Captures fast optical transients with 13.5 MHz full-power bandwidth and 30 ps aperture jitter. Use Value: High dynamic range and wide input bandwidth preserve signal integrity during rapid light-level changes. |
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 |
|---|---|---|---|
| AD7477ARTZ-REEL7 | Same 10-bit SC70 device but in tape-and-reel packaging (not cut tape); identical electrical specs and pinout. | No functional difference - selected when automated SMT placement requires reel format. | Choose AD7477ARTZ-REEL7 for volume production with pick-and-place machines; AD7477AARMZ is cut-tape compatible for prototyping and low-volume builds. |
| ADS7822IDR | 12-bit, 200 kSPS, 8-pin SOIC; higher resolution but lower speed and larger footprint; requires external reference. | Better precision for static measurements (e.g., thermistor readout), but unsuitable for >500 kSPS real-time capture. | Select ADS7822IDR only when resolution >10 bits is mandatory and throughput <200 kSPS suffices; AD7477AARMZ offers superior speed/size/power trade-off. |
Compared with AD7477ARTZ-REEL7, AD7477AARMZ offers identical performance in cut-tape form for flexible evaluation and small-batch assembly; versus ADS7822IDR, it trades 2-bit resolution for 5× higher throughput, 40% smaller footprint, and integrated reference - making it optimal for dynamic, space-limited sensing.
Availability
AD7477AARMZ is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and industrial sensor interfaces requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for AD7477AARMZ 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 ultra-compact, low-power data acquisition in portable and energy-sensitive applications - prioritizing SC70 integration, single-supply operation, and SPI-compatible simplicity.
FAQ
What is the maximum sample rate supported by the AD7477AARMZ?
The AD7477AARMZ supports a maximum throughput rate of 1 MSPS under specified conditions (VDD = 2.35 V to 5.25 V, fSCLK ≤ 20 MHz). This is achieved using 14 SCLK cycles per conversion, meaning a minimum SCLK period of 50 ns (20 MHz) is required to sustain full-rate operation. At lower clock speeds, throughput scales linearly.
Does the AD7477AARMZ require an external voltage reference?
No, the AD7477AARMZ uses an internal reference derived from VDD, establishing a 0 V to VDD analog input range. This eliminates the need for external reference components, simplifies layout, and reduces BOM cost - while maintaining guaranteed linearity and accuracy over the full supply range.
What is the analog input voltage range for the AD7477AARMZ?
The AD7477AARMZ has a single-ended analog input range of 0 V to VDD. For example, with a 3.3 V supply, the valid input span is 0 V to 3.3 V; with a 5 V supply, it is 0 V to 5 V. The input is protected to –0.3 V and VDD + 0.3 V per absolute maximum ratings.
How does the AD7477AARMZ enter and exit power-down mode?
The AD7477AARMZ enters full power-down mode automatically when CS remains high and no SCLK activity occurs for >100 ns. It exits power-down and becomes ready for conversion within 1 µs after the next CS falling edge - consuming ≤1 µA static current and enabling rapid wake-up in duty-cycled systems.
Is the AD7477AARMZ pin-compatible with other members of the AD7476A/AD7477A/AD7478A family?
Yes - the AD7477AARMZ shares identical 6-lead SC70 pinout and interface protocol with AD7476AARMZ and AD7478AARMZ. All three variants use the same VIN, GND, VDD, CS, SDATA, and SCLK connections and differ only in resolution (12/10/8-bit) and associated AC/DC performance parameters.
AD7477AARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for AD7477AARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7477AARMZ 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 reliable?
The price and inventory of AD7477AARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7477AARMZ is usually 5 days.
3.What payment methods are accepted for AD7477AARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7477AARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7477AARMZ?
AD7477AARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7477AARMZ 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?
For technical support, including AD7477AARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7477AARMZ requirements.
6.How does Aetrix verify that AD7477AARMZ is sourced from the original manufacturer or authorized distributors?
All AD7477AARMZ 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 meets industry standards.
7.What is the process for return or replacement of AD7477AARMZ?
All AD7477AARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7477AARMZ, 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 part is unused and in its original packaging.
Return procedure for AD7477AARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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