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Analog Devices Inc. AD7495BRZ-REEL7
- Part No.:
- AD7495BRZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7495BRZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,212
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Product details
Overview
AD7495BRZ-REEL7 from Analog Devices is a 12-bit, 1 MSPS successive-approximation ADC with integrated 2.5 V reference, single-supply operation (2.7 V to 5.25 V), 68 dB SINAD at 300 kHz input, and SPI-/QSPI-/MICROWIRE-compatible serial interface. It serves as a high-speed analog front-end digitizer in portable instrumentation requiring low power and precise DC accuracy.
For engineers reviewing the AD7495BRZ-REEL7 datasheet, AD7495BRZ-REEL7 pinout, AD7495BRZ-REEL7 application, or AD7495BRZ-REEL7 equivalent, key selection considerations include on-chip reference stability (±50 ppm/°C), VDRIVE logic-level independence, no pipeline delay, 1 µA full shutdown current, and SOIC-8 package compatibility with space-constrained PCB layouts.
Technical Context
The AD7495BRZ-REEL7 implements a capacitive DAC-based SAR architecture with track-and-hold acquisition time ≤325 ns for full-scale steps. Conversion is initiated by CS falling edge and clocked by SCLK up to 20 MHz - no external timing controller required.
Its on-chip 2.5 V reference (REF OUT) delivers 2.4625 V to 2.5375 V output with 10 Ω typical output impedance and supports direct buffering for system-level reference distribution. The VDRIVE pin decouples logic interface voltage (2.7 V–5.25 V) from analog supply (VDD), enabling seamless interfacing with 3 V or 5 V microcontrollers without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes over 0 V to 2.5 V input range |
| Throughput Rate | 1 MSPS - supports real-time sampling of signals up to ~130 kHz Nyquist bandwidth |
| SINAD | 68 dB min at 300 kHz - ensures ≥11.3 effective bits for medium-bandwidth sensor signals |
| Reference Output | 2.5 V ±1.5% with 50 ppm/°C drift - eliminates need for external precision reference in cost-sensitive designs |
| Power Dissipation | 6 mW max at 3 V / 1 MSPS - enables battery operation >100 hours in 10 kSPS duty-cycled systems |
| Shutdown Current | 1 µA max - reduces quiescent load during idle periods without sacrificing wake-up latency |
| Aperture Jitter | 50 ps typ - limits SNR degradation to <0.1 dB at 100 kHz input frequency |
Pinout & Package
AD7495BRZ-REEL7 is housed in an 8-lead SOIC package (body width 3.9 mm, JEDEC MS-012). Pin functions are validated per Analog Devices Rev. D datasheet Figures 5–6 and Table 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF OUT) | On-chip reference output | Provides buffered 2.5 V reference; requires ≥100 nF bypass capacitor to GND for stability |
| 2 (VIN) | Analog input | Single-ended input referenced to GND; accepts 0 V to 2.5 V range only |
| 3 (GND) | Analog ground | Primary return path for analog circuitry; must be tied to clean analog ground plane |
| 4 (SCLK) | Serial clock input | Drives both data transfer and internal conversion timing; supports 10 kHz–20 MHz operation |
| 5 (SDATA) | Serial data output | 3-state output delivering 4 leading zeros + 12-bit MSB-first result on SCLK falling edge |
| 6 (VDRIVE) | Digital I/O supply | Sets logic threshold levels independently of VDD; allows direct connection to 3 V or 5 V host processors |
| 7 (CS) | Chip select | Active-low signal that initiates sampling on falling edge and frames serial data window |
| 8 (VDD) | Analog/digital supply | Single 2.7 V–5.25 V rail powering core ADC, reference, and digital logic |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True sample-and-hold control via CS enables deterministic sampling instants critical for synchronized multi-channel acquisition |
| VDRIVE logic independence | Allows mixed-voltage systems: e.g., 5 V VDD for analog performance while interfacing to 3 V FPGA I/O banks |
| On-chip 2.5 V reference | Eliminates external reference IC and associated layout complexity; REF OUT usable as system-wide reference source when buffered |
| Three power modes | Full shutdown (1 µA), partial power-down (230 µA), and normal operation (2 mA @ 3 V) enable dynamic power scaling per throughput demand |
| SPI/QSPI/MICROWIRE compatibility | Interoperates with standard DSP/microcontroller serial peripherals without custom driver development |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Digitizing ECG or pulse oximetry analog outputs in handheld diagnostic devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Primary ADC capturing biopotential waveforms at 1 kSPS–10 kSPS with <1 LSB INL error and stable reference over temperature. Use Value: Integrated 2.5 V reference and 1 µA shutdown current extend battery life while maintaining clinical-grade linearity (±1 LSB INL). | Use Scenario: Sampling temperature, pressure, and humidity transducer outputs in unattended field-deployed environmental monitors. IC Role / Device Role / Timing Role: Low-power, high-accuracy digitizer operating intermittently at 100 SPS with automatic wake-on-event capability. Use Value: VDRIVE pin enables direct connection to 3.3 V MCU GPIOs; 68 dB SINAD ensures resolution of sub-millivolt sensor signals despite noisy industrial environments. |
| Optical Sensor Interfaces | Mobile Communication Test Equipment |
Use Scenario: Converting photodiode current outputs in optical smoke detectors or fiber-optic link margin analyzers. IC Role / Device Role / Timing Role: High-input-bandwidth ADC capturing fast transient light pulses with minimal aperture jitter. Use Value: 50 ps aperture jitter and 8.3 MHz full-power bandwidth preserve rise-time fidelity of µs-scale optical events. | Use Scenario: Capturing RF front-end baseband I/Q signals in handheld spectrum analyzers or cellular protocol testers. IC Role / Device Role / Timing Role: Medium-speed digitizer acquiring modulated waveforms for FFT-based spectral analysis at 1 MSPS. Use Value: 68 dB SINAD at 300 kHz input directly supports 12-bit ENOB for LTE/Wi-Fi signal quality assessment without oversampling. |
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 |
|---|---|---|---|
| ADS7822U | 2.7 V–5.25 V supply, 1 MSPS, no internal reference, requires external 2.5 V REF | Lacks on-chip reference; demands additional BOM item and layout area for reference decoupling | Select when system already provides high-precision external reference and board space is constrained for passive components |
| MAX11100ETE+ | 2.7 V–3.6 V supply only, 1 MSPS, internal 2.048 V reference, 10-lead TDFN | Narrower supply range and lower reference voltage limit full-scale input to 2.048 V; smaller package increases routing density | Prefer for ultra-low-voltage battery systems where 2.048 V FS range suffices and TDFN thermal performance is advantageous |
Compared with ADS7822U and MAX11100ETE+, the AD7495BRZ-REEL7 uniquely combines internal 2.5 V reference, wide 2.7 V–5.25 V supply tolerance, and SOIC-8 manufacturability - simplifying design-in for general-purpose portable instrumentation without sacrificing AC performance or DC accuracy.
Availability
AD7495BRZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, medical instruments, optical sensors, and industrial data acquisition requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for AD7495BRZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The AD7495BRZ-REEL7 belongs to the AD7475/AD7495 family of micropower SAR ADCs designed specifically for space- and power-constrained applications demanding high DC accuracy, low noise, and simple digital interfacing - not general-purpose data conversion.
FAQ
What is the reference voltage specification for the AD7495BRZ-REEL7?
The AD7495BRZ-REEL7 features an integrated 2.5 V reference with output voltage specified from 2.4625 V to 2.5375 V (±1.5%) at 25°C and a temperature coefficient of 50 ppm/°C typical. REF OUT requires a minimum 100 nF ceramic capacitor to GND for stability and low-noise operation. This eliminates external reference components in most designs using the AD7495BRZ-REEL7.
Does the AD7495BRZ-REEL7 support true 1 MSPS continuous conversion?
Yes, the AD7495BRZ-REEL7 achieves a maximum throughput rate of 1 MSPS with a 20 MHz SCLK and proper CS timing. Conversion time is fixed at 800 ns (16 SCLK cycles), and the device guarantees no pipeline delay - meaning each CS assertion initiates one complete conversion with deterministic latency. Real-world sustained 1 MSPS operation requires meeting tQUIET ≥100 ns between conversions.
How does the VDRIVE pin function in the AD7495BRZ-REEL7?
The VDRIVE pin on the AD7495BRZ-REEL7 sets the logic threshold voltages for all digital inputs (CS, SCLK) and output (SDATA), independent of VDD. It accepts 2.7 V–5.25 V and allows direct interfacing with 3 V or 5 V host processors without level-shifting circuitry. For example, VDD = 5 V (for optimal analog performance) and VDRIVE = 3.3 V (to match MCU I/O) is fully supported in the AD7495BRZ-REEL7.
What are the power consumption modes of the AD7495BRZ-REEL7?
The AD7495BRZ-REEL7 offers three operational modes: Normal Mode (2 mA max @ 3 V / 1 MSPS), Partial Power-Down (230 µA max static), and Full Power-Down (1 µA max). Power state is controlled via CS timing sequences defined in the datasheet. Full shutdown retains no configuration state but achieves lowest leakage; recovery time is 650 µs - a value confirmed for the AD7495BRZ-REEL7 in Rev. D specifications.
Is the AD7495BRZ-REEL7 pin-compatible with the AD7475 series?
No, the AD7495BRZ-REEL7 is not pin-compatible with AD7475 variants. While both use 8-lead SOIC/MSOP packages and share identical pin numbering, Pin 1 is REF OUT on the AD7495BRZ-REEL7 versus REF IN on the AD7475. Swapping them without circuit modification causes reference misconnection and invalid conversion results. The AD7495BRZ-REEL7 requires dedicated PCB layout.
AD7495BRZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7495BRZ-REEL7 FAQ
1.How can I place an order for AD7495BRZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7495BRZ-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 AD7495BRZ-REEL7 reliable?
The price and inventory of AD7495BRZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7495BRZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7495BRZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7495BRZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7495BRZ-REEL7?
AD7495BRZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7495BRZ-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 AD7495BRZ-REEL7?
For technical support, including AD7495BRZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7495BRZ-REEL7 requirements.
6.How does Aetrix verify that AD7495BRZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7495BRZ-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 AD7495BRZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7495BRZ-REEL7?
All AD7495BRZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7495BRZ-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 AD7495BRZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7495BRZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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