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Analog Devices Inc. AD7495ARM-REEL7
- Part No.:
- AD7495ARM-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7495ARM-REEL7.pdf
- Description:
- IC ADC 12BIT SRL LP W/REF 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
AD7495ARM-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-/DSP-compatible serial interface. It serves as the primary analog-to-digital conversion stage in portable instrumentation where low power, high throughput, and self-contained reference are critical.
For engineers reviewing the AD7495ARM-REEL7 datasheet, AD7495ARM-REEL7 pinout, AD7495ARM-REEL7 application, or AD7495ARM-REEL7 equivalent, key selection considerations include on-chip 2.5 V reference accuracy (±1.5% over temperature), REF OUT impedance (10 Ω typ), full-power bandwidth (8.3 MHz @ 3 dB), no-pipeline-delay timing control via CS, and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The AD7495ARM-REEL7 implements a capacitive DAC-based successive-approximation architecture with track-and-hold acquisition time ≤325 ns for full-scale steps. Its conversion is initiated on the falling edge of CS and clocked by SCLK, requiring exactly 16 cycles at up to 20 MHz - eliminating pipeline latency and enabling deterministic sampling control.
It features dual supply domains: VDD powers the core ADC and analog circuitry (2.7 V–5.25 V), while VDRIVE independently sets logic I/O voltage (2.7 V–5.25 V), allowing direct interfacing with 3 V or 5 V microcontrollers without level shifters. The on-chip 2.5 V reference (REF OUT) delivers 2.4625 V to 2.5375 V output with 50 ppm/°C tempco and requires ≥100 nF decoupling to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete digital codes across full-scale range |
| Throughput Rate | 1 MSPS maximum - supports real-time sampling of signals up to 500 kHz Nyquist bandwidth |
| SINAD | 68 dB min at fIN = 300 kHz - ensures ≥11.3 effective bits for medium-frequency sensor signals |
| Reference Output | 2.5 V ±1.5% (2.4625 V–2.5375 V) - eliminates need for external reference in cost-sensitive designs |
| Power Dissipation | 6 mW max at 3 V / 1 MSPS - enables battery operation with <2 mA supply current |
| Aperture Jitter | 50 ps typ - limits sampling uncertainty to <0.1 LSB at 100 kHz input |
| Full Power Bandwidth | 8.3 MHz @ 3 dB - supports accurate digitization of fast transients and wideband sensor outputs |
Pinout & Package
AD7495ARM-REEL7 is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm × 1.0 mm height, 0.65 mm pitch), optimized for compact PCB layouts in portable systems. Pin assignments are validated per Analog Devices Rev. D datasheet Figures 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 capacitor to GND; not intended as load source |
| 2 (VIN) | Analog input | Single-ended input with 0 V to 2.5 V range; 20 pF input capacitance; ±1 µA leakage |
| 3 (GND) | Analog ground | Primary return path for analog circuitry; must be connected to clean system AGND plane |
| 4 (SCLK) | Serial clock input | Drives both data transfer and internal ADC conversion timing; supports 10 kHz–20 MHz |
| 5 (SDATA) | Serial data output | 3-state output delivering 12-bit result MSB-first with four leading zeros; driven by VDRIVE |
| 6 (VDRIVE) | Digital I/O supply | Sets logic threshold for all digital pins; independent of VDD - enables mixed-voltage interfacing |
| 7 (CS) | Chip select / conversion trigger | Active-low signal that initiates sampling on falling edge and frames serial data transfer |
| 8 (VDD) | Analog/digital core supply | Powers ADC core, T/H amplifier, and reference; 2.7 V–5.25 V range; 450 mW max package dissipation |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Sampling instant precisely controlled by CS falling edge; conversion completes in fixed 16-SCLK cycles - essential for time-critical closed-loop control |
| VDRIVE logic supply independence | Allows direct connection to 3 V or 5 V host processors without level translation - reduces BOM count and layout complexity |
| Integrated 2.5 V reference | Eliminates external reference IC and associated decoupling; REF OUT specified from −40°C to +85°C with 50 ppm/°C drift |
| Three power-down modes | Full shutdown draws ≤1 µA; partial power-down cuts current to 230 µA static - extends battery life between conversions |
| Wide input bandwidth | 68 dB SINAD maintained at 300 kHz input frequency - suitable for ultrasound, vibration, and optical sensor front-ends |
Applications
| Portable Medical Sensors | Optical Sensor Interfaces |
|---|---|
Use Scenario: Digitizing photodiode current from pulse oximetry or blood glucose sensors in handheld clinical devices. IC Role / Device Role / Timing Role: Primary ADC capturing analog sensor output with precise timing triggered by CS for synchronized LED pulsing. Use Value: On-chip 2.5 V reference ensures stable full-scale range without calibration drift across temperature; 68 dB SINAD preserves SNR for low-amplitude physiological signals. |
Use Scenario: Converting output from ambient light or proximity sensors in smart wearables and IoT nodes. IC Role / Device Role / Timing Role: Low-power ADC sampling ambient conditions at sub-100 kSPS rates during wake cycles, entering 1 µA shutdown between reads. Use Value: 6 mW max power at 3 V enables >1-year battery life in coin-cell-powered devices; MSOP-8 footprint fits tight wearable PCBs. |
| Industrial Data Loggers | Mobile Communication Test Equipment |
Use Scenario: Acquiring voltage/current readings from field transducers in battery-powered remote monitoring units. IC Role / Device Role / Timing Role: High-accuracy ADC interfaced to 3 V microcontroller via SPI, using VDRIVE to match host logic levels. Use Value: ±1 LSB INL (typ) and ±7 LSB gain error enable single-point calibration; REF OUT stability minimizes recalibration frequency. |
Use Scenario: Capturing RF detector outputs or baseband I/Q signals in handheld spectrum analyzers or cellular test tools. IC Role / Device Role / Timing Role: Medium-speed ADC handling burst-mode measurements with deterministic CS-triggered sampling. Use Value: 8.3 MHz full-power bandwidth supports accurate digitization of modulated IF signals; no pipeline delay simplifies trigger synchronization. |
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 |
|---|---|---|---|
| AD7475ARM-REEL7 | Lacks on-chip reference; requires external 2.5 V REF IN; lower power (4.5 mW @ 3 V) | Suitable when system already provides precision reference; preferred for ultra-low-power designs where reference overhead is avoided | Select AD7475ARM-REEL7 only if external reference is available and power budget is tighter than reference integration benefit |
| ADS7822U | 2.7 V–5.5 V supply; 1 MSPS; no internal reference; SPI interface; 65 dB SINAD @ 100 kHz | Lower dynamic performance; higher THD (−65 dB); used in cost-sensitive industrial controls where 11-bit ENOB suffices | Choose ADS7822U for legacy designs or price-driven applications accepting reduced AC performance and external reference dependency |
Compared with AD7475ARM-REEL7, AD7495ARM-REEL7 trades 1.5 mW higher power for integrated reference convenience and identical speed/linearity; versus ADS7822U, it delivers +3 dB SINAD and guaranteed no-missed-codes operation at full 12-bit resolution.
Availability
AD7495ARM-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and optical sensor interfaces requiring stable component supply with guaranteed long-term sourcing.
Supply support for AD7495ARM-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.
The AD7495ARM-REEL7 belongs to the AD7475/AD7495 family of micropower, single-supply SAR ADCs designed specifically for space- and power-constrained portable instrumentation and sensor interface applications.
FAQ
What is the reference voltage specification for AD7495ARM-REEL7?
The AD7495ARM-REEL7 features an integrated 2.5 V reference output (REF OUT) with a guaranteed range of 2.4625 V to 2.5375 V (±1.5%) over −40°C to +85°C, 50 ppm/°C temperature coefficient, and 10 Ω typical output impedance. A minimum 100 nF capacitor must be placed from REF OUT to GND for stability. This eliminates the need for an external reference in most applications.
Does AD7495ARM-REEL7 support true 1 MSPS continuous conversion?
Yes, AD7495ARM-REEL7 achieves a maximum throughput rate of 1 MSPS when operated 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 - each conversion starts precisely on the falling edge of CS and completes deterministically, enabling reliable high-speed streaming.
Can AD7495ARM-REEL7 interface directly with a 3 V microcontroller while powered from 5 V?
Yes. AD7495ARM-REEL7 uses separate VDD (2.7 V–5.25 V for analog core) and VDRIVE (2.7 V–5.25 V for digital I/O) supplies. When VDRIVE = 3 V and VDD = 5 V, all digital pins (CS, SCLK, SDATA) operate at 3 V logic levels - enabling direct, level-shift-free connection to 3 V microcontrollers without additional circuitry.
What is the analog input voltage range of AD7495ARM-REEL7?
The analog input (VIN) range of AD7495ARM-REEL7 is 0 V to 2.5 V, referenced to the internal 2.5 V REF OUT. This is fixed and non-adjustable. Input leakage is ±1 µA max, and input capacitance is 20 pF typical. Signals exceeding 2.5 V or going below 0 V may damage the part or cause erroneous conversions.
How does power management work in AD7495ARM-REEL7?
AD7495ARM-REEL7 offers three power states: Normal Mode (2 mA max at 3 V/1 MSPS), Partial Power-Down (230 µA max static), and Full Power-Down (1 µA max). Power state is controlled via CS and SCLK sequencing per the datasheet Operating Modes section - no dedicated control register is required, simplifying firmware implementation for battery-aware systems.
AD7495ARM-REEL7 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:
- Active
- 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:
- -
AD7495ARM-REEL7 FAQ
1.How can I place an order for AD7495ARM-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7495ARM-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 AD7495ARM-REEL7 reliable?
The price and inventory of AD7495ARM-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7495ARM-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7495ARM-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7495ARM-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7495ARM-REEL7?
AD7495ARM-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7495ARM-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 AD7495ARM-REEL7?
For technical support, including AD7495ARM-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7495ARM-REEL7 requirements.
6.How does Aetrix verify that AD7495ARM-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7495ARM-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 AD7495ARM-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7495ARM-REEL7?
All AD7495ARM-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7495ARM-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 AD7495ARM-REEL7 part is unused and in its original packaging.
Return procedure for AD7495ARM-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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