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Analog Devices Inc. AD7495ARMZ-REEL7
- Part No.:
- AD7495ARMZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7495ARMZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,845
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Product details
Overview
AD7495ARMZ-REEL7 from Analog Devices is a 12-bit, 1 MSPS successive-approximation ADC with on-chip 2.5 V reference, single-supply operation (2.7 V to 5.25 V), SPI-compatible serial interface, and 68 dB SINAD at 300 kHz input - used in portable medical instruments and battery-powered data acquisition systems.
For engineers reviewing the AD7495ARMZ-REEL7 datasheet, AD7495ARMZ-REEL7 pinout, AD7495ARMZ-REEL7 application, or AD7495ARMZ-REEL7 equivalent, key selection criteria include guaranteed no-missed-codes performance, VDRIVE logic-level independence, full-power bandwidth of 8.3 MHz, standby current ≤1 µA, and MSOP-8 package compatibility with space-constrained embedded signal chains.
Technical Context
The AD7495ARMZ-REEL7 implements a capacitive DAC-based successive-approximation architecture with track-and-hold acquisition time ≤325 ns for full-scale steps and aperture jitter of 50 ps. Conversion is initiated by CS falling edge and synchronized to SCLK, with no pipeline delay and deterministic 16-cycle conversion time.
It features dual power domains: VDD supplies analog and core logic (2.7–5.25 V), while VDRIVE independently sets digital I/O voltage (2.7–5.25 V), enabling direct interfacing to 3 V or 5 V microcontrollers without level shifters. The integrated 2.5 V reference provides ±1% initial accuracy and 50 ppm/°C temperature coefficient at REF OUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete output codes for high-fidelity sensor digitization |
| Throughput Rate | 1 MSPS - supports real-time sampling of audio-band and control-loop signals |
| SINAD | 68 dB min at 300 kHz - enables accurate representation of dynamic signals with >10-bit effective resolution |
| Reference | On-chip 2.5 V ±1% - eliminates external reference component and layout area; REF OUT drives buffered analog front-ends |
| Power Dissipation | 6 mW max at 3 V / 1 MSPS - extends battery life in portable instrumentation |
| Standby Current | 1 µA max - allows rapid wake-up from ultra-low-power sleep modes |
| Full Power Bandwidth | 8.3 MHz @ −3 dB - supports anti-aliasing filter design for inputs up to 300 kHz with margin |
Pinout & Package
AD7495ARMZ-REEL7 is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for compact PCB layouts in handheld and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF OUT) | Integrated reference output | Provides 2.4625 V to 2.5375 V buffered 2.5 V reference; requires ≥100 nF decoupling to GND |
| 2 (VIN) | Analog input | Single-ended input with 0 V to 2.5 V range referenced to internal REF OUT; 20 pF input capacitance |
| 3 (GND) | Analog ground | Primary return path for analog circuitry; must be connected to low-impedance analog ground plane |
| 4 (SCLK) | Serial clock input | Drives both data transfer and internal ADC conversion timing; supports 10 kHz–20 MHz operation |
| 5 (SDATA) | Serial data output | MSB-first 12-bit result preceded by four leading zeros; tri-state controlled by CS |
| 6 (VDRIVE) | Digital I/O supply | Sets logic thresholds independently of VDD - enables mixed-voltage system interfacing |
| 7 (CS) | Chip select | Active-low signal that initiates sampling on falling edge and frames serial data transfer |
| 8 (VDD) | Analog/digital core supply | 2.7 V–5.25 V single supply powering ADC core, track-and-hold, and internal reference |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Deterministic 16-SCLK conversion with precise sampling instant controlled by CS edge - essential for time-critical control loops |
| VDRIVE logic independence | Separate VDRIVE pin allows direct connection to 3 V or 5 V host processors without level-shifting components |
| Three power-down modes | Partial (230 µA) and full (1 µA) shutdown reduce average power in burst-sampling applications |
| Guaranteed no missing codes | Differential nonlinearity of +1.5/−0.9 LSB ensures monotonic transfer function across full temperature range |
| Wide input bandwidth | 8.3 MHz full-power bandwidth supports accurate digitization of fast transients and RF envelope detection |
Applications
| Portable Medical Sensors | Battery-Powered DAQ |
|---|---|
Use Scenario: Digitizing ECG, pulse oximetry, or impedance plethysmography signals in handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary analog front-end ADC capturing biopotential waveforms at ≥1 kSPS with DC-coupled accuracy and low noise floor. Use Value: On-chip 2.5 V reference eliminates calibration drift from external references; 1 µA standby current extends single-charge battery life to weeks. |
Use Scenario: Field-deployable environmental monitoring nodes measuring temperature, humidity, and gas concentration. IC Role / Device Role / Timing Role: Low-power, high-accuracy ADC interfaced to microcontroller via SPI for scheduled sensor polling. Use Value: VDRIVE pin enables direct 3.3 V MCU interface; 68 dB SINAD ensures reliable 10+ ENOB for calibrated sensor outputs. |
| Optical Sensor Interfaces | Industrial Control Loops |
Use Scenario: Converting photodiode or pyroelectric detector outputs in smoke detectors or IR thermometers. IC Role / Device Role / Timing Role: High-speed sampling of transient optical pulses with wide analog bandwidth and minimal aperture jitter. Use Value: 50 ps aperture jitter preserves timing fidelity of short-duration light pulses; 8.3 MHz bandwidth captures fast rise-time events. |
Use Scenario: Closed-loop feedback acquisition in motor drive or power supply monitoring circuits. IC Role / Device Role / Timing Role: Real-time voltage/current sensing ADC with deterministic conversion latency for PID computation. Use Value: No pipeline delay ensures consistent sample-to-interrupt timing; 1 MSPS throughput supports 100 kHz control bandwidths. |
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 |
|---|---|---|---|
| AD7475ARMZ-REEL7 | Requires external 2.5 V reference; lower power (4.5 mW at 3 V); no REF OUT pin | Lacks integrated reference - suitable where system already provides precision reference rail | Select when reference sharing across multiple ADCs reduces BOM cost and improves channel matching |
| ADS7822U | 2.7 V–5.25 V supply; 1 MSPS; no internal reference; 65 dB SINAD at 300 kHz; SO-8 package | Lower dynamic performance and no on-chip reference - suited for cost-sensitive industrial sensing | Choose for legacy designs using TI's SPI ADC footprint or where 3 dB SINAD margin is acceptable |
Compared with AD7495ARMZ-REEL7, AD7475ARMZ-REEL7 trades integrated reference for lower power and smaller die size, while ADS7822U offers pin-compatible migration with relaxed AC specs but broader industry support and longer lifecycle visibility.
Availability
AD7495ARMZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and optical sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for AD7495ARMZ-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 AD7495ARMZ-REEL7 belongs to the AD7475/AD7495 family of micropower SAR ADCs designed specifically for space- and energy-constrained signal acquisition in portable and remote measurement systems.
FAQ
What is the reference voltage source for AD7495ARMZ-REEL7?
The AD7495ARMZ-REEL7 integrates a precision 2.5 V bandgap reference, accessible at the REF OUT pin (Pin 1). It delivers 2.4625 V to 2.5375 V over temperature with 50 ppm/°C drift and requires ≥100 nF ceramic decoupling to GND. This eliminates need for external reference components in most applications.
Does AD7495ARMZ-REEL7 support SPI mode 0 or mode 3?
Yes, AD7495ARMZ-REEL7 supports SPI mode 0 (CPOL = 0, CPHA = 0) and mode 3 (CPOL = 1, CPHA = 1) as it is compatible with SPI, QSPI™, MICROWIRE™, and DSP serial interfaces. Data is sampled on the falling edge of SCLK, and SDATA is valid after the falling edge with t4 ≤ 40 ns.
Can AD7495ARMZ-REEL7 operate with VDD = 3.3 V and VDRIVE = 1.8 V?
No - VDRIVE must be within 2.7 V to 5.25 V per datasheet specifications. Applying 1.8 V to VDRIVE violates absolute maximum ratings and risks incorrect logic-level interpretation or damage. For 1.8 V host interfaces, use level-shifting circuitry or select an ADC with native 1.8 V I/O support.
What is the maximum recommended SCLK frequency for AD7495ARMZ-REEL7?
The maximum SCLK frequency for AD7495ARMZ-REEL7 is 20 MHz, enabling minimum conversion time of 800 ns (16 cycles). At this rate, the device achieves its rated 1 MSPS throughput. Exceeding 20 MHz violates timing specifications and may cause data corruption or incomplete conversions.
Is AD7495ARMZ-REEL7 pin-compatible with AD7475ARMZ-REEL7?
Yes - AD7495ARMZ-REEL7 and AD7475ARMZ-REEL7 share identical MSOP-8 pinouts, including VDD, GND, SCLK, SDATA, CS, VDRIVE, VIN, and REF-related pins. However, Pin 1 is REF OUT on AD7495ARMZ-REEL7 versus REF IN on AD7475ARMZ-REEL7, requiring board-level redesign if swapping between them.
AD7495ARMZ-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:
- -
AD7495ARMZ-REEL7 FAQ
1.How can I place an order for AD7495ARMZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7495ARMZ-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 AD7495ARMZ-REEL7 reliable?
The price and inventory of AD7495ARMZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7495ARMZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7495ARMZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7495ARMZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7495ARMZ-REEL7?
AD7495ARMZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7495ARMZ-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 AD7495ARMZ-REEL7?
For technical support, including AD7495ARMZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7495ARMZ-REEL7 requirements.
6.How does Aetrix verify that AD7495ARMZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7495ARMZ-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 AD7495ARMZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7495ARMZ-REEL7?
All AD7495ARMZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7495ARMZ-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 AD7495ARMZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7495ARMZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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