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Analog Devices Inc. AD7475ARMZ-REEL7
- Part No.:
- AD7475ARMZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7475ARMZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,263
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Product details
Overview
AD7475ARMZ-REEL7 from Analog Devices is a 12-bit, 1 MSPS successive-approximation ADC operating from a single 2.7 V to 5.25 V supply, featuring an external 2.5 V reference input (REF IN), no pipeline delay, and SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface. It delivers 68 dB SINAD at 300 kHz input frequency and consumes only 4.5 mW at 3 V/1 MSPS, targeting precision data acquisition in space-constrained, battery-powered systems.
For engineers reviewing the AD7475ARMZ-REEL7 datasheet, AD7475ARMZ-REEL7 pinout, AD7475ARMZ-REEL7 application, or AD7475ARMZ-REEL7 equivalent, key selection criteria include its 8-lead MSOP package, VDRIVE logic-level independence, 1 µA full shutdown current, 300 ns track-and-hold acquisition time, and guaranteed no-missed-codes performance with ±1 LSB DNL (B version).
Technical Context
The AD7475ARMZ-REEL7 implements a capacitive DAC-based successive-approximation architecture with on-chip track-and-hold, sampling on the falling edge of CS and initiating conversion immediately. Its conversion time is fixed at 800 ns (16 SCLK cycles at 20 MHz), with no latency between sample initiation and result availability.
It supports flexible power management via three modes: normal (1.5 mA at 3 V/1 MSPS), partial power-down (100 µA static), and full power-down (1 µA). The VDRIVE pin decouples logic interface voltage (2.7 V–5.25 V) from analog supply (VDD), enabling direct interfacing with 3 V or 5 V processors without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete output codes for high-fidelity signal digitization. |
| Throughput Rate | 1 MSPS - supports real-time sampling of signals up to ~300 kHz while maintaining 68 dB SINAD. |
| Power Dissipation | 4.5 mW max at 3 V/1 MSPS - enables operation in thermally constrained or battery-powered designs. |
| SINAD | 68 dB min at fIN = 300 kHz - ensures accurate representation of dynamic signals with low noise/distortion floor. |
| Integral Nonlinearity | ±1 LSB max (B version) - guarantees monotonicity and predictable transfer function across full scale. |
| Differential Nonlinearity | +1.5/−0.9 LSB max - ensures no missing codes over temperature and supply range. |
| Aperture Jitter | 50 ps typ - limits sampling uncertainty, critical for high-frequency AC performance. |
| Track-and-Hold Acquisition | 300 ns max (sine wave) - allows fast settling after sample initiation, supporting high-throughput operation. |
Pinout & Package
AD7475ARMZ-REEL7 is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), RoHS-compliant and tape-and-reel packaged (REEL7 denotes 1000-unit reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF IN | Reference Input | Accepts external 2.5 V ±1% reference; requires ≥0.1 µF decoupling capacitor for stable ADC accuracy. |
| 2 - VIN | Analog Input | Single-ended input with 0 V to REF IN range; 20 pF input capacitance necessitates careful driver design. |
| 3 - GND | Analog Ground | Primary ground reference for analog circuitry; must be connected to low-impedance analog ground plane. |
| 4 - SCLK | Serial Clock Input | Provides clock for both serial data transfer and internal SAR conversion timing; supports up to 20 MHz. |
| 5 - SDATA | Serial Data Output | 3-state output delivering 12-bit result MSB-first preceded by four leading zeros; driven by VDRIVE voltage. |
| 6 - VDRIVE | Logic Power Supply | Sets I/O voltage level (2.7 V–5.25 V) independently of VDD, enabling mixed-voltage system interfacing. |
| 7 - CS | Chip Select (Active Low) | Initiates conversion on falling edge and frames serial data; defines acquisition window start point. |
| 8 - VDD | Analog/Digital Supply | Single 2.7 V–5.25 V supply powering core ADC, T/H, and digital logic; 450 mW absolute max power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Conversion completes in fixed 800 ns with deterministic timing-enables precise synchronization in closed-loop control. |
| VDRIVE logic independence | Allows direct connection to 3 V or 5 V microcontrollers without level-shifting circuitry, reducing BOM count and layout complexity. |
| Three power modes | Full shutdown (1 µA), partial power-down (100 µA), and operational modes enable dynamic power scaling based on throughput demand. |
| Guaranteed no-missed-codes | ±0.9 LSB minimum DNL ensures monotonic response across full temperature range (−40°C to +85°C), critical for control applications. |
| Wide input bandwidth | 8.3 MHz full-power bandwidth (@ 3 dB) supports accurate digitization of fast transients and RF-sampled baseband signals. |
| SPI/QSPI/MICROWIRE compatibility | Interoperates with common DSP and MCU serial peripherals without protocol translation or firmware modification. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous acquisition of ECG or pulse oximetry analog signals in handheld diagnostic devices with strict power budgets. IC Role / Device Role / Timing Role: Primary analog-to-digital converter capturing biopotential waveforms at 1 kSPS–1 MSPS with <1 µA standby draw between samples. Use Value: 4.5 mW active power at 3 V enables >100 hours of operation on a single CR2032 coin cell when duty-cycled, while 68 dB SINAD preserves clinical-grade signal fidelity. |
Use Scenario: Environmental monitoring nodes logging temperature, humidity, and gas sensor outputs over weeks on lithium-thionyl chloride batteries. IC Role / Device Role / Timing Role: High-accuracy front-end ADC triggered periodically by RTC interrupt, entering full shutdown (1 µA) between conversions. Use Value: Guaranteed monotonicity and ±1 LSB INL ensure calibrated sensor readings remain traceable across temperature extremes without software correction. |
| Industrial Field Transmitters | Optical Sensor Interfaces |
Use Scenario: 4–20 mA loop-powered process transmitters digitizing pressure or flow sensor outputs in hazardous locations. IC Role / Device Role / Timing Role: Precision ADC referenced to stable external bandgap (2.5 V ±0.5%), operating from 3.3 V derived from loop supply. Use Value: External REF IN architecture isolates reference accuracy from VDD noise and drift, maintaining <0.1% total unadjusted error over 15-year field life. |
Use Scenario: High-speed photodiode or CCD readout in portable spectrometers requiring wide dynamic range and low distortion. IC Role / Device Role / Timing Role: Digitizing fast-rising optical pulses with 50 ps aperture jitter and 8.3 MHz full-power bandwidth to preserve rise-time integrity. Use Value: 300 ns track-and-hold acquisition time enables accurate sampling of sub-microsecond optical events without waveform distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, 1 MSPS SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7476ARMZ-REEL7 | Same 8-lead MSOP package and pinout; higher speed (1.5 MSPS) but increased power (6.5 mW @ 3 V) and reduced DNL (±2 LSB max). | Better suited for higher-throughput systems where 500 kSPS margin is required and power budget allows +2 mW. | Select AD7476ARMZ-REEL7 only if throughput >1 MSPS is mandatory and ±1 LSB DNL is not required. |
| ADS7822U | 8-lead SOIC package (larger footprint); 1 MSPS, 12-bit SAR but requires external reference and lacks VDRIVE functionality. | Requires level-shifting for 3 V MCU interfacing and separate reference design, increasing board area and component count. | Choose ADS7822U only if SOIC is mandated for legacy assembly or cost sensitivity outweighs size/power advantages of AD7475ARMZ-REEL7. |
Compared with AD7476ARMZ-REEL7 and ADS7822U, AD7475ARMZ-REEL7 uniquely balances ultra-low power (4.5 mW), guaranteed no-missed-codes performance, and VDRIVE-enabled mixed-voltage interoperability in the smallest MSOP footprint-making it optimal for next-generation portable instrumentation where size, battery life, and signal integrity are co-constrained.
Availability
AD7475ARMZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, medical instruments, and optical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AD7475ARMZ-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, with design centers worldwide and a 50+ year heritage in precision data conversion.
The AD7475ARMZ-REEL7 belongs to Analog Devices' micropower SAR ADC product line, engineered specifically for portable, battery-operated instrumentation demanding high accuracy, low quiescent current, and minimal PCB area in harsh industrial and medical environments.
FAQ
What is the reference configuration for AD7475ARMZ-REEL7?
The AD7475ARMZ-REEL7 requires an external 2.5 V ±1% reference applied to the REF IN pin (Pin 1). A minimum 0.1 µF ceramic capacitor must be placed directly at this pin for stability. Unlike the AD7495, it does not include an internal reference, ensuring flexibility in reference selection and noise isolation in sensitive measurement systems.
Does AD7475ARMZ-REEL7 support true 1 MSPS continuous sampling?
Yes, AD7475ARMZ-REEL7 achieves a sustained 1 MSPS throughput rate with a 20 MHz SCLK and proper timing margins. Its 800 ns conversion time and 300 ns track-and-hold acquisition allow back-to-back conversions meeting the 1 µs cycle requirement, confirmed in Timing Example 1 of the Rev. D datasheet.
Can AD7475ARMZ-REEL7 interface directly with a 3 V microcontroller while powered from 5 V?
Yes. The VDRIVE pin (Pin 6) sets the logic interface voltage independently of VDD. Connecting VDRIVE to the 3 V MCU supply enables full SPI compatibility-including correct VOH/VOL levels and timing-while VDD remains at 5 V for optimal analog performance, eliminating external level shifters.
What is the guaranteed differential nonlinearity (DNL) specification for AD7475ARMZ-REEL7?
The AD7475ARMZ-REEL7 B-version guarantees DNL of +1.5/−0.9 LSB maximum across −40°C to +85°C, ensuring no missing codes over full scale and temperature. This is explicitly specified in Table 1 of the Rev. D datasheet and validated during production test.
How does the power-down mode operate in AD7475ARMZ-REEL7?
AD7475ARMZ-REEL7 supports three power states: full shutdown (1 µA, entered via CS high + no SCLK), partial power-down (100 µA, reduced clock activity), and normal mode. Full shutdown retains no state and requires 20 µs wake-up time before first conversion, as specified in Table 3 timing parameters.
AD7475ARMZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- 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:
- External
- 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:
- -
AD7475ARMZ-REEL7 FAQ
1.How can I place an order for AD7475ARMZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7475ARMZ-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 AD7475ARMZ-REEL7 reliable?
The price and inventory of AD7475ARMZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7475ARMZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7475ARMZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7475ARMZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7475ARMZ-REEL7?
AD7475ARMZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7475ARMZ-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 AD7475ARMZ-REEL7?
For technical support, including AD7475ARMZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7475ARMZ-REEL7 requirements.
6.How does Aetrix verify that AD7475ARMZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7475ARMZ-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 AD7475ARMZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7475ARMZ-REEL7?
All AD7475ARMZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7475ARMZ-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 AD7475ARMZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7475ARMZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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