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Analog Devices Inc. AD7477AWARMZ
- Part No.:
- AD7477AWARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7477AWARMZ.pdf
- Description:
- IC ADC 10BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,353
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Product details
Overview
AD7477AWARMZ 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, serving as a precision analog front-end for battery-powered instrumentation and portable medical sensors.
For engineers reviewing the AD7477AWARMZ datasheet, AD7477AWARMZ pinout, AD7477AWARMZ application, or AD7477AWARMZ equivalent, this page provides verified specifications, SC70 package mapping, SPI/QSPI/MICROWIRE-compatible serial interface timing, and validated automotive-grade alternatives for low-power, high-speed data acquisition systems.
Technical Context
The AD7477AWARMZ implements a single-supply, 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 using SCLK, supporting 14-cycle serial framing (four leading zeros + 10-bit result + two trailing zeros).
Its internal reference is derived from VDD, enabling a full-scale analog input range of 0 V to VDD. The device achieves 13.5 MHz full-power bandwidth and 30 ps aperture jitter, with acquisition time ≤250 ns and conversion time ≤700 ns at 20 MHz SCLK.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for medium-precision sensor digitization |
| 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 effective bits (ENOB) in anti-aliasing-limited applications |
| Supply Range | 2.35 V to 5.25 V - compatible with Li-ion, 3.3 V, and 5 V system rails without external regulators |
| Power Dissipation | 5.1 mW max at 3 V / 1 MSPS - enables <10 µA average current in duty-cycled sensing nodes |
| INL / DNL | ±0.5 LSB max each - guarantees monotonicity and no missing codes across full temperature range |
| Standby Current | 1 µA max - allows rapid wake-up from ultra-low-power sleep between acquisitions |
Pinout & Package
AD7477AWARMZ uses a 6-lead SC70 package (2.2 mm × 1.35 mm, 0.5 mm pitch), optimized for space-constrained portable designs. Thermal resistance θJA = 340.2°C/W reflects its compact footprint and low-power operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power supply input | Single 2.35–5.25 V rail powers analog core, reference, and digital interface; also serves as internal reference source |
| 2 - GND | Analog ground reference | Common return for VIN, internal T/H, and comparator; must be star-connected to minimize noise coupling |
| 3 - VIN | Analog input channel | Single-ended input with 0 V to VDD range; 20 pF input capacitance requires low-impedance driving (<130 Ω recommended) |
| 4 - CS | Chip select / conversion trigger | Active-low signal initiates sampling on falling edge and frames serial data; minimum pulse width 10 ns |
| 5 - SDATA | Serial data output | Three-state CMOS output delivering 14-bit frame (4 leading zeros + 10-bit result + 2 trailing zeros) MSB-first on SCLK falling edge |
| 6 - SCLK | Serial clock input | Drives both data transfer and internal conversion timing; supports 10 kHz–20 MHz; 40/60 mark/space ratio required |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True single-cycle conversion with deterministic latency: sample triggered by CS falling edge, result available within 700 ns |
| SPI/QSPI/MICROWIRE/DSP compatibility | Standard 3-wire serial interface eliminates need for protocol translation logic in microcontroller-based systems |
| VDD-referenced input range | 0 V to VDD scaling simplifies sensor interfacing and removes external reference components or level-shifting circuitry |
| Low-power standby mode | 1 µA max quiescent current enables >1000× power reduction vs. active mode, critical for battery lifetime extension |
| Automotive qualification | Rated for −40°C to +85°C (A/B grade), meeting AEC-Q100 stress test requirements for under-hood and infotainment subsystems |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous ECG waveform digitization in handheld patient monitors with 3.3 V Li-ion supply. IC Role / Device Role / Timing Role: Primary analog front-end ADC capturing biopotential signals at 1 kSPS–1 MSPS with minimal power overhead. Use Value: 61 dB SINAD ensures diagnostic-grade fidelity; 1 µA standby current extends battery life to >1 week per charge. |
Use Scenario: Environmental parameter logging (temperature, humidity, light) in remote field nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during scheduled measurement bursts to conserve energy. Use Value: 250 ns acquisition time enables fast wake-up and sampling; SC70 footprint minimizes PCB area in ultra-compact enclosures. |
| Industrial Handheld Testers | Optical Sensor Signal Conditioning |
Use Scenario: Multifunction handheld DMMs requiring simultaneous voltage/current/resistance measurements with sub-100 µs response. IC Role / Device Role / Timing Role: High-speed SAR ADC interfaced directly to microcontroller GPIOs via 3-wire SPI, eliminating FPGA glue logic. Use Value: 1 MSPS throughput supports real-time waveform capture; ±0.5 LSB INL ensures traceable accuracy per IEC 61000-4-30 Class A. |
Use Scenario: Photodiode current-to-voltage conversion and digitization in optical smoke detectors with 2.7 V supply. IC Role / Device Role / Timing Role: Digitizing transimpedance amplifier output with wide dynamic range and low noise floor. Use Value: 71 dB SNR (typ) resolves weak photocurrent signals; 13.5 MHz full-power bandwidth accommodates fast transient detection pulses. |
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 |
|---|---|---|---|
| AD7477AARMZ | Same die, identical SC70-6 package and pinout; differs only in tape-and-reel packaging (WARMZ = wafer-level chip-scale, ARMZ = standard reel) | No functional difference; ARMZ variant used in high-volume automated assembly where standard reel format is preferred | Select AD7477AARMZ for SMT line compatibility; AD7477AWARMZ for space-constrained modules requiring smallest possible footprint |
| ADS7822U | 12-bit, 200 kSPS, 8-pin SOIC; higher resolution but lower speed and larger package; requires external reference | Better DC accuracy for precision thermistor readout, but unsuitable for >500 kSPS dynamic signal capture | Choose ADS7822U when ENOB > 11 bits is mandatory and throughput ≤200 kSPS suffices; avoid for battery-powered high-speed use cases |
Compared with AD7477AWARMZ, AD7477AARMZ offers identical electrical performance in a standard reel format ideal for production lines, while ADS7822U trades speed and size for higher resolution and external reference flexibility-making it suitable only for static or low-bandwidth precision applications.
Availability
AD7477AWARMZ is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and industrial handheld testers requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for AD7477AWARMZ 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 design centers worldwide and ISO 9001-certified manufacturing.
The AD7476A/AD7477A/AD7478A family was engineered for ultra-low-power, high-speed data acquisition in space- and energy-constrained portable electronics, emphasizing SC70 miniaturization, single-supply simplicity, and automotive qualification.
FAQ
What is the maximum sampling rate supported by the AD7477AWARMZ?
The AD7477AWARMZ supports a maximum throughput rate of 1 MSPS, achieved with a 20 MHz serial clock (SCLK) and 14-cycle conversion frame. At lower SCLK frequencies, throughput scales linearly-for example, 5 MHz SCLK yields ~315 kSPS. The device maintains specified AC performance across its full 1 MSPS range, including 61 dB SINAD at 100 kHz input frequency.
Does the AD7477AWARMZ require an external voltage reference?
No, the AD7477AWARMZ uses an internal reference derived from the VDD supply, establishing a full-scale analog input range of 0 V to VDD. This eliminates the need for external reference components, reduces BOM count, and simplifies layout-especially beneficial in compact, cost-sensitive designs like portable medical sensors and handheld testers where AD7477AWARMZ is commonly deployed.
How does the AD7477AWARMZ handle power management in battery-operated devices?
The AD7477AWARMZ features a full power-down mode drawing ≤1 µA, enabling aggressive duty cycling. When paired with a microcontroller that asserts CS only during acquisition windows, average current drops dramatically-e.g., 1 µA standby + 1.7 mA active at 1 MSPS for 10 µs per sample yields <2 µA average at 1 kSPS. This behavior is explicitly characterized and guaranteed across −40°C to +85°C for AD7477AWARMZ.
What digital interfaces are compatible with the AD7477AWARMZ serial port?
The AD7477AWARMZ supports SPI, QSPI, MICROWIRE, and DSP-compatible 3-wire serial protocols. Its SDATA output is three-state, CS acts as frame sync, and SCLK clocks data on the falling edge-matching standard SPI Mode 0 (CPOL = 0, CPHA = 1) timing. No configuration registers or initialization sequences are required, allowing direct connection to most microcontrollers' hardware SPI peripherals without firmware abstraction layers.
Is the AD7477AWARMZ pin-compatible with other members of the AD7476A/AD7477A/AD7478A family?
Yes, AD7477AWARMZ shares identical 6-lead SC70 pinout and signal definitions with AD7476AWARMZ (12-bit) and AD7478AWARMZ (8-bit). All three variants use the same VDD, GND, VIN, CS, SDATA, and SCLK connections and support the same serial framing (leading/trailing zeros adjust per resolution). This enables hardware reuse across precision tiers-e.g., upgrading from AD7477AWARMZ to AD7476AWARMZ requires only firmware changes, not PCB revision.
AD7477AWARMZ 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:
- 2.35V ~ 5.25V
- Voltage - Supply, Digital:
- 2.35V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- -
AD7477AWARMZ FAQ
1.How can I place an order for AD7477AWARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7477AWARMZ 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 AD7477AWARMZ reliable?
The price and inventory of AD7477AWARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7477AWARMZ is usually 5 days.
3.What payment methods are accepted for AD7477AWARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7477AWARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7477AWARMZ?
AD7477AWARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7477AWARMZ 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 AD7477AWARMZ?
For technical support, including AD7477AWARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7477AWARMZ requirements.
6.How does Aetrix verify that AD7477AWARMZ is sourced from the original manufacturer or authorized distributors?
All AD7477AWARMZ 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 AD7477AWARMZ meets industry standards.
7.What is the process for return or replacement of AD7477AWARMZ?
All AD7477AWARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7477AWARMZ, 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 AD7477AWARMZ part is unused and in its original packaging.
Return procedure for AD7477AWARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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