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Analog Devices Inc. AD7475BRMZ-REEL7
- Part No.:
- AD7475BRMZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7475BRMZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,724
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Product details
Overview
AD7475BRMZ-REEL7 from Analog Devices is a 12-bit, single-supply successive-approximation ADC with 1 MSPS throughput, 68 dB SINAD at 300 kHz, ±1.5 LSB INL (B grade), and operation from 2.7 V to 5.25 V. It features an external 2.5 V reference input (REF IN), VDRIVE for independent logic-level interfacing, and no pipeline delay-used in portable instrumentation and battery-powered data acquisition.
For engineers reviewing the AD7475BRMZ-REEL7 datasheet, AD7475BRMZ-REEL7 pinout, AD7475BRMZ-REEL7 application, or AD7475BRMZ-REEL7 equivalent, key selection considerations include its 1 MSPS sampling rate with 4.5 mW power at 3 V, 8-lead MSOP package, SPI-compatible serial interface, and requirement for external 2.5 V ±1% reference.
Technical Context
The AD7475BRMZ-REEL7 implements a capacitive DAC-based successive-approximation architecture with track-and-hold acquisition time ≤325 ns and aperture jitter of 50 ps. Its conversion is initiated on the falling edge of CS and clocked by SCLK, requiring exactly 16 cycles at up to 20 MHz for full 12-bit result output.
It supports three operating modes-normal, partial power-down (100 µA max), and full power-down (1 µA)-with power-up time of 20 µs. The VDRIVE pin decouples logic I/O voltage (2.7 V–5.25 V) from analog supply (VDD), enabling direct interfacing to 3 V or 5 V microprocessors without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete digital codes over full-scale input range |
| Throughput Rate | 1 MSPS - enables real-time sampling of signals up to 500 kHz Nyquist bandwidth |
| SINAD | 68 dB min at fIN = 300 kHz - supports high-fidelity digitization of medium-bandwidth sensor signals |
| INL (B Grade) | ±1 LSB max at 5 V - ensures monotonicity and <1 LSB end-point error for precision measurement |
| Power Dissipation | 4.5 mW max at 3 V / 1 MSPS - enables >200 kSPS average sampling in ultra-low-power battery systems |
| Reference Input | 2.5 V ±1% required on REF IN - mandates stable external reference (e.g., AD780) for specified DC accuracy |
| Package | 8-lead MSOP - 3 mm × 3 mm footprint compatible with space-constrained portable PCB layouts |
Pinout & Package
AD7475BRMZ-REEL7 is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm × 1.1 mm body height, 0.65 mm pitch). 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 decoupling capacitor to GND for noise immunity and stability |
| 2 (VIN) | Analog input | Single-ended input with 0 V to REF IN range; 20 pF input capacitance necessitates low-impedance driving source |
| 3 (GND) | Analog ground | Primary return path for analog circuitry; must be connected to clean system AGND plane, separate from DGND if possible |
| 4 (SCLK) | Serial clock input | Drives both data transfer and internal conversion timing; supports up to 20 MHz; 40/60 mark/space ratio required |
| 5 (SDATA) | Serial data output | 3-state output delivering four leading zeros + 12-bit MSB-first result on SCLK falling edge; 10 pF max floating capacitance |
| 6 (VDRIVE) | Digital I/O supply | Sets logic threshold levels independently of VDD; allows direct connection to 3 V or 5 V host processor I/O without level translation |
| 7 (CS) | Chip select (active low) | Initiates conversion on falling edge; frames serial data transfer; minimum 10 ns setup to first SCLK required |
| 8 (VDD) | Analog/digital supply | Single 2.7 V–5.25 V supply powering core ADC, T/H, and digital logic; 450 mW max power dissipation rating |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture enables deterministic, one-shot conversion with precise sampling instant controlled by CS edge |
| VDRIVE logic independence | Allows simultaneous 3 V microcontroller interface and 5 V analog supply-eliminates external level shifters in mixed-voltage systems |
| Low-power shutdown | Full power-down mode draws only 1 µA, enabling rapid wake-up (20 µs) for duty-cycled sensing applications |
| Wide supply range | Operates from 2.7 V to 5.25 V-supports direct integration into legacy 5 V systems or modern 3 V battery-powered designs |
| High input bandwidth | 8.3 MHz full-power bandwidth (@ 3 dB) enables accurate digitization of fast transients and wideband sensor outputs |
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 12-bit ADC capturing biopotential signals at 1–2 kSPS with low noise and guaranteed monotonicity. Use Value: 68 dB SINAD at 300 kHz and ±1 LSB INL ensure clinical-grade waveform fidelity; 4.5 mW @ 3 V extends battery life beyond 72 hours. |
Use Scenario: Multi-channel environmental monitoring (temperature, humidity, pressure) in remote field nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-quiescent ADC performing burst-mode sampling every 10 seconds, entering full shutdown between reads. Use Value: 1 µA shutdown current minimizes standby drain; VDRIVE enables direct SPI connection to 1.8 V MCU without regulator overhead. |
| Industrial Handheld Testers | Optical Sensor Signal Conditioning |
Use Scenario: Portable multimeter or insulation tester acquiring DC/AC voltage and current measurements with autoranging. IC Role / Device Role / Timing Role: Precision front-end ADC handling 0–2.5 V input scaled via external resistive dividers and op-amp buffers. Use Value: External 2.5 V reference support ensures traceable calibration; 1 MSPS rate allows oversampling for enhanced resolution in DC measurements. |
Use Scenario: Digitizing photodiode or phototransistor outputs in optical encoders or position sensors. IC Role / Device Role / Timing Role: High-speed ADC capturing fast light-pulse edges in incremental encoder feedback loops. Use Value: 8.3 MHz full-power bandwidth and 50 ps aperture jitter preserve edge timing integrity; 325 ns acquisition time supports >300 kSPS closed-loop control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7476BRMZ-REEL7 | Same 12-bit SAR architecture but rated for 1.25 MSPS; higher power (5.5 mW @ 3 V); identical pinout and reference scheme | Preferred where higher throughput is needed without changing layout or firmware interface | Select AD7476BRMZ-REEL7 when sampling rates >1 MSPS are required and additional 1 mW power budget is acceptable |
| ADS7822U | 12-bit SAR ADC with integrated 2.5 V reference; 200 kSPS max; 8-pin SOIC only; no VDRIVE pin-requires matched VDD/VIO | Suitable for cost-sensitive, lower-speed applications where external reference elimination simplifies BOM | Choose ADS7822U for fixed 2.5 V systems with ≤200 kSPS needs and no need for dual-voltage I/O flexibility |
Compared with AD7475BRMZ-REEL7, AD7476BRMZ-REEL7 offers higher speed at modest power cost, while ADS7822U trades speed and flexibility for integrated reference and lower unit cost-neither is pin-compatible, but all share SPI-compatible serial framing.
Availability
AD7475BRMZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and industrial handheld testers requiring stable component supply across extended production lifecycles.
Supply support for AD7475BRMZ-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 Wilmington, MA.
The AD7475BRMZ-REEL7 belongs to Analog Devices' precision SAR ADC product line, designed specifically for low-power, high-accuracy data acquisition in portable and energy-constrained applications.
FAQ
What is the reference voltage requirement for AD7475BRMZ-REEL7?
The AD7475BRMZ-REEL7 requires an external 2.5 V ±1% reference applied to the REF IN pin. This reference sets the full-scale analog input range (0 V to 2.5 V) and directly impacts DC accuracy-using a precision reference like the AD780 ensures specified INL and gain error performance. The AD7475BRMZ-REEL7 does not include an internal reference.
Does AD7475BRMZ-REEL7 support SPI interface timing?
Yes, AD7475BRMZ-REEL7 supports SPI-, QSPI™-, MICROWIRE-, and DSP-compatible serial interfaces. It uses CS as frame sync and SCLK for clocking; data is output MSB-first with four leading zeros on SDATA's falling edge. Maximum SCLK is 20 MHz, and timing parameters (e.g., t4 = 40 ns data access) are fully specified in the datasheet.
Can AD7475BRMZ-REEL7 operate from a 3.3 V supply?
Yes, AD7475BRMZ-REEL7 operates across 2.7 V to 5.25 V on VDD. At 3.3 V, it delivers 1 MSPS throughput with 1.5 mA typical current draw (4.95 mW), maintaining full AC and DC specifications including 68 dB SINAD and ±1 LSB INL (B grade). VDRIVE may be set to 3.3 V or 3 V to match host logic.
What power-saving modes does AD7475BRMZ-REEL7 offer?
AD7475BRMZ-REEL7 provides three power modes: Normal (1.5 mA @ 3 V), Partial Power-Down (100 µA static), and Full Power-Down (1 µA). Full shutdown retains no state and wakes in 20 µs. Mode selection is controlled via CS and SCLK sequencing per the datasheet's Operating Modes section-no dedicated control register is required.
Is AD7475BRMZ-REEL7 pin-compatible with AD7495 variants?
No, AD7475BRMZ-REEL7 is not pin-compatible with AD7495 variants. While both use 8-lead MSOP/SOIC packages, AD7475BRMZ-REEL7 has REF IN on Pin 1, whereas AD7495 has REF OUT on Pin 1. Swapping them without board revision will cause reference misconnection and functional failure.
AD7475BRMZ-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:
- -
AD7475BRMZ-REEL7 FAQ
1.How can I place an order for AD7475BRMZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7475BRMZ-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 AD7475BRMZ-REEL7 reliable?
The price and inventory of AD7475BRMZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7475BRMZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7475BRMZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7475BRMZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7475BRMZ-REEL7?
AD7475BRMZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7475BRMZ-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 AD7475BRMZ-REEL7?
For technical support, including AD7475BRMZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7475BRMZ-REEL7 requirements.
6.How does Aetrix verify that AD7475BRMZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7475BRMZ-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 AD7475BRMZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7475BRMZ-REEL7?
All AD7475BRMZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7475BRMZ-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 AD7475BRMZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7475BRMZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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