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Analog Devices Inc. AD7475BRM-REEL
- Part No.:
- AD7475BRM-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7475BRM-REEL.pdf
- Description:
- IC ADC 12BIT SRL LP 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
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Product details
Overview
AD7475BRM-REEL 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 68 dB SINAD at 300 kHz input, 4.5 mW max power at 3 V/1 MSPS, and external 2.5 V reference input (REF IN). It serves as a high-speed, low-power analog front-end in portable data acquisition systems requiring precise DC accuracy and wide input bandwidth.
For engineers reviewing the AD7475BRM-REEL datasheet, AD7475BRM-REEL pinout, AD7475BRM-REEL application, or AD7475BRM-REEL equivalent, key selection considerations include its 12-bit resolution with ±1 LSB max DNL, no pipeline delay, SPI/QSPI/MICROWIRE-compatible serial interface, VDRIVE logic-level independence, and MSOP-8 package compatibility with space-constrained embedded designs.
Technical Context
The AD7475BRM-REEL implements a capacitive DAC-based successive-approximation architecture with on-chip track-and-hold, enabling accurate sampling on the falling edge of CS and full conversion completion in 16 SCLK cycles. Its analog input range is strictly 0 V to REF IN (externally applied 2.5 V ±1%), and it supports independent logic voltage via VDRIVE (2.7 V–5.25 V).
It features three power modes: normal (1.5 mA max at 3 V/1 MSPS), partial power-down (100 µA max static), and full shutdown (1 µA max), with power-up time of 20 µs. Timing is fully synchronous to SCLK, with no latency between CS assertion and sample capture - aperture jitter is 50 ps typ and acquisition time is 300 ns max for sine-wave inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete output codes with straight binary coding and LSB = VREF/4096. |
| Throughput Rate | 1 MSPS maximum - enables real-time sampling of signals up to ~300 kHz while maintaining 68 dB SINAD. |
| SINAD | 68 dB min at fIN = 300 kHz - confirms usable dynamic range for medium-bandwidth sensor and instrumentation signals. |
| Power Dissipation | 4.5 mW max at 3 V/1 MSPS - allows battery operation in portable medical or handheld test equipment. |
| Differential Nonlinearity | ±1.5/−0.9 LSB max - guarantees no missing codes across full 12-bit range at 5 V supply. |
| Aperture Jitter | 50 ps typ - limits sampling uncertainty, supporting <12-bit accuracy up to ~1 MHz input frequencies. |
| Reference Input | 2.5 V ±1% required on REF IN pin - mandates external precision reference (e.g., AD780) with ≥0.1 µF decoupling. |
Pinout & Package
AD7475BRM-REEL is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), RoHS-compliant and moisture-sensitive level 1. Pin 1 is marked with a dot; pin numbering follows standard MSOP top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF IN) | External reference input | Accepts 2.5 V ±1% reference; requires ≥0.1 µF ceramic decoupling to GND for stable conversion accuracy. |
| 2 (VIN) | Analog input | Single-ended input with 0 V to REF IN range; 20 pF input capacitance and ±1 µA leakage affect anti-alias filter design. |
| 3 (GND) | Analog ground | Primary reference for analog circuitry; must be tied to clean analog ground plane, separate from digital return paths. |
| 4 (SCLK) | Serial clock input | Drives both data transfer and internal conversion timing; supports 10 kHz–20 MHz; defines conversion time as 16×tSCLK. |
| 5 (SDATA) | Serial data output | 3-state output delivering 4 leading zeros + 12-bit MSB-first result on SCLK falling edge; 10 pF max floating capacitance. |
| 6 (VDRIVE) | Logic interface supply | Sets I/O voltage levels independently of VDD; enables direct interfacing to 3 V or 5 V microcontrollers without level shifters. |
| 7 (CS) | Chip select / conversion trigger | Active-low signal that initiates sampling on falling edge and frames serial data; tQUIET ≥100 ns required between conversions. |
| 8 (VDD) | Analog/digital power supply | Single 2.7 V–5.25 V supply powering core ADC, T/H, and logic; 450 mW absolute max power dissipation rating. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture ensures deterministic, single-cycle conversion with precise CS-controlled sampling instant - critical for time-critical control loops. |
| VDRIVE logic independence | Allows VDD = 5 V (for analog performance) while interfacing directly to 3 V FPGA or MCU I/O banks - eliminates external level translators. |
| Low-power shutdown | Full power-down mode draws only 1 µA, enabling rapid wake-up (20 µs) for duty-cycled sensing applications like wearable health monitors. |
| Wide supply range | Operates from 2.7 V to 5.25 V without performance degradation - supports both Li-ion (3.0–4.2 V) and regulated 5 V rails in industrial modules. |
| High input bandwidth | 8.3 MHz full-power bandwidth (@3 dB) enables accurate digitization of fast transients and optical sensor pulses without external amplification. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
|
Use Scenario: Continuous acquisition of ECG or pulse oximetry signals in battery-powered handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary analog-to-digital converter capturing 12-bit waveform data at up to 1 MSPS with minimal power overhead. Use Value: 4.5 mW max power at 3 V extends battery life; 68 dB SINAD preserves clinical-grade signal fidelity at 300 kHz bandwidth. |
Use Scenario: Multi-channel voltage monitoring in DIN-rail mounted condition-monitoring units deployed in factory environments. IC Role / Device Role / Timing Role: High-accuracy front-end ADC for isolated analog inputs, synchronized via CS to central controller. Use Value: ±1 LSB DNL and external 2.5 V reference ensure traceable measurement linearity; MSOP-8 footprint saves PCB area in dense I/O modules. |
| Optical Sensor Interfaces | Mobile Communication Test Equipment |
|
Use Scenario: Digitizing fast-rise-time photodiode outputs in laser distance meters or barcode scanners. IC Role / Device Role / Timing Role: High-speed sampling node with 50 ps aperture jitter to resolve sub-nanosecond optical pulses. Use Value: 8.3 MHz full-power bandwidth captures >10 ns rise times; no pipeline delay enables precise time-of-flight alignment. |
Use Scenario: Embedded signal analysis in compact RF field strength analyzers used for cellular base station commissioning. IC Role / Device Role / Timing Role: Medium-speed digitizer for IF-stage envelope detection and modulation quality assessment. Use Value: SPI-compatible serial interface simplifies integration with ARM-based host processors; 1 µA shutdown supports intermittent sweep modes. |
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 |
|---|---|---|---|
| AD7476BRM-REEL | Same 12-bit SAR architecture and MSOP-8 package, but rated for 1.25 MSPS and higher power (5.5 mW @ 3 V); improved THD (−80 dB vs −75 dB). | Better suited for higher-speed transient capture where throughput margin is needed, but requires tighter layout for noise control. | Select AD7476BRM-REEL when >1 MSPS headroom or lower distortion is required; AD7475BRM-REEL remains optimal for strict 1 MSPS + ultra-low-power trade-offs. |
| ADS7822U | 12-bit, 250 kSPS SAR ADC in MSOP-8; uses internal reference (2.5 V), lacks VDRIVE, and consumes 2.5 mW @ 3 V - significantly slower and less flexible. | Targeted at cost-sensitive, low-throughput applications like basic sensor readout where speed is not critical. | Choose ADS7822U only for non-time-critical, low-cost designs; AD7475BRM-REEL provides 4× higher throughput and superior interface flexibility. |
Compared with AD7476BRM-REEL and ADS7822U, the AD7475BRM-REEL uniquely balances 1 MSPS throughput, 4.5 mW power, external reference control, and VDRIVE-enabled mixed-voltage interfacing - making it the preferred choice for portable, precision, medium-speed data acquisition where power, size, and timing determinism are jointly constrained.
Availability
AD7475BRM-REEL is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, optical sensor interfaces, and mobile communication test equipment requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for AD7475BRM-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, with deep expertise in precision data conversion and signal conditioning.
The AD7475BRM-REEL belongs to Analog Devices' precision SAR ADC product line, designed specifically for battery-powered and space-constrained instrumentation applications demanding high DC accuracy, low power, and deterministic timing behavior.
FAQ
What is the reference configuration for AD7475BRM-REEL?
The AD7475BRM-REEL requires an external 2.5 V ±1% reference applied to the REF IN pin (Pin 1). Unlike the AD7495, it does not include an internal reference. A minimum 0.1 µF ceramic capacitor must be placed between REF IN and GND to ensure stable conversion accuracy and low noise performance across temperature and supply variations. The AD7475BRM-REEL's analog input range is strictly 0 V to REF IN.
Does AD7475BRM-REEL support SPI-compatible serial communication?
Yes, the AD7475BRM-REEL features a native SPI-/QSPI™-/MICROWIRE-/DSP-compatible serial interface. Data is clocked out on the falling edge of SCLK as a 16-bit frame: four leading zeros followed by the 12-bit conversion result in MSB-first order. CS controls both sampling initiation and data framing, and no additional protocol translation or glue logic is required for direct connection to standard microcontroller SPI peripherals.
What is the power consumption of AD7475BRM-REEL at 1 MSPS with a 3 V supply?
At 3 V supply and 1 MSPS throughput, the AD7475BRM-REEL consumes a maximum of 1.5 mA, corresponding to 4.5 mW power dissipation. In partial power-down mode at 100 kSPS, current drops to 100 µA max (static), and in full shutdown, it draws just 1 µA - enabling aggressive power gating in duty-cycled systems without sacrificing wake-up latency (20 µs).
Can AD7475BRM-REEL interface directly with a 3 V microcontroller while powered from 5 V?
Yes. The AD7475BRM-REEL's VDRIVE pin (Pin 6) allows independent setting of logic I/O voltage. When VDRIVE = 3 V and VDD = 5 V, the device maintains full analog performance while driving and receiving 3 V logic levels on CS, SCLK, and SDATA - eliminating level shifters and simplifying mixed-supply system design.
What are the absolute maximum ratings for AD7475BRM-REEL's analog input voltage?
The absolute maximum analog input voltage for AD7475BRM-REEL is −0.3 V to VDD + 0.3 V. However, for specified operation, the input must remain within 0 V to REF IN (i.e., 0 V to 2.5 V). Exceeding the 2.5 V upper limit risks code errors or damage if sustained; transient overvoltage beyond absolute max ratings may cause permanent latch-up or parametric shift, even if within the ±10 mA pin current limit.
AD7475BRM-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7475BRM-REEL FAQ
1.How can I place an order for AD7475BRM-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7475BRM-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 AD7475BRM-REEL reliable?
The price and inventory of AD7475BRM-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7475BRM-REEL is usually 5 days.
3.What payment methods are accepted for AD7475BRM-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7475BRM-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7475BRM-REEL?
AD7475BRM-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7475BRM-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 AD7475BRM-REEL?
For technical support, including AD7475BRM-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7475BRM-REEL requirements.
6.How does Aetrix verify that AD7475BRM-REEL is sourced from the original manufacturer or authorized distributors?
All AD7475BRM-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 AD7475BRM-REEL meets industry standards.
7.What is the process for return or replacement of AD7475BRM-REEL?
All AD7475BRM-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7475BRM-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 AD7475BRM-REEL part is unused and in its original packaging.
Return procedure for AD7475BRM-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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