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Analog Devices Inc. AD7865YS-2
- Part No.:
- AD7865YS-2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 44-QFP
- Datasheet:
-
AD7865YS-2.pdf
- Description:
- IC ADC 14BIT 4CH 5V 44-MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,938
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Product details
Overview
AD7865YS-2 from Analog Devices is a four-channel, simultaneous-sampling, 14-bit analog-to-digital converter (ADC) operating from a single 5 V supply. It features four integrated track/hold amplifiers, 2.4 µs conversion time per channel, 0 V to 5 V or 0 V to 2.5 V unipolar input ranges, and a high-speed parallel interface. It is designed for real-time phase-coherent acquisition in industrial power monitoring and motor control systems.
For engineers reviewing the AD7865YS-2 datasheet, AD7865YS-2 pinout, AD7865YS-2 application, or AD7865YS-2 equivalent, this page delivers verified specifications, validated pin functions, confirmed unipolar input behavior, thermal-grade packaging (–40°C to +105°C), and direct alternative part comparisons - all grounded in Analog Devices' official Rev. B documentation.
Technical Context
The AD7865YS-2 implements a successive approximation ADC architecture with four independent track/hold amplifiers enabling true simultaneous sampling across VIN1A/VIN1B through VIN4A/VIN4B. Its internal 2.5 V reference, laser-trimmed oscillator, and aperture delay matching ≤4 ns preserve inter-channel timing integrity for phase-sensitive measurements.
Conversion sequencing is configurable via hardware (SL1–SL4 pins) or software (DB0–DB3 register write), with CONVST triggering hold mode and BUSY signaling full-sequence completion. The device supports both reading between conversions (EOC-driven) and post-sequence reads (BUSY-driven), and its VDRIVE pin enables 3 V logic interfacing without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete output codes for high-fidelity digitization of analog sensor or feedback signals. |
| Conversion Time | 2.4 µs max per channel - enables up to 350 kSPS single-channel throughput or 100 kSPS full four-channel simultaneous sampling. |
| Input Range | 0 V to 2.5 V or 0 V to 5 V - unipolar operation optimized for microcontroller/DSP interfaces requiring ground-referenced signal chains. |
| Aperture Delay Matching | ≤4 ns max - ensures sub-degree phase error between channels at 50 kHz, critical for vector-controlled AC motor drives. |
| Power Dissipation | 150 mW max (100 mW typ) - supports thermally constrained embedded designs while maintaining 77 dB SNR over temperature. |
| Operating Temperature | –40°C to +105°C - qualified for under-hood automotive and industrial environments without derating. |
| Output Coding | Straight (natural) binary - simplifies firmware parsing versus two's complement, eliminating sign-extension logic in unipolar applications. |
Pinout & Package
The AD7865YS-2 is housed in a 44-lead Plastic Lead Quad Flatpack (PQFP), 0.3 inch² footprint, with exposed pad not electrically connected. Pin 1 identifier located at top-left corner (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BUSY (Pin 1) | Active-high status output | Asserted at CONVST rising edge and held until all selected channels complete conversion - used to gate read operations or synchronize DMA transfers. |
| CONVST (Pin 3) | Convert start input | Rising-edge-triggered command that simultaneously freezes all four track/holds and initiates conversion sequence - essential for deterministic multi-channel capture timing. |
| EOC (Pin 44) | End-of-conversion output | Active-low pulse marking completion of each individual channel conversion - enables pipelined data reads without waiting for full BUSY deassertion. |
| DB0–DB13 (Pins 38–43, 27–34) | 14-bit parallel data bus | Three-state TTL outputs delivering straight-binary results; DB0 = LSB, DB13 = MSB - compatible with 3 V or 5 V digital logic via VDRIVE pin configuration. |
| H/S SEL (Pin 11) | Hardware/software selection | Logic-level control determining whether channel sequence is set by SL1–SL4 pins (H/S = 0) or DB0–DB3 register (H/S = 1) - enables flexible system-level integration. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling across four channels | Maintains phase coherence between voltage/current feedback paths in motor control, enabling accurate field-oriented control algorithms. |
| 0.35 µs track/hold acquisition time | Allows rapid re-tracking after conversion, supporting continuous high-throughput sampling without settling-induced distortion. |
| Internal 2.5 V reference with ±20 mV error | Eliminates external reference component count and layout sensitivity while meeting 14-bit linearity requirements over temperature. |
| VDRIVE pin for 3 V logic interfacing | Enables direct connection to 3 V microcontrollers or DSPs without level-shifting circuitry, reducing BOM cost and board area. |
| Overvoltage protection (–1 V to +18 V) | Withstands transient surges on analog inputs without latch-up or performance degradation - critical for industrial I/O modules. |
Applications
| AC Motor Control | Industrial Power Monitoring |
|---|---|
Use Scenario: Real-time acquisition of three-phase current and DC bus voltage in variable-frequency drives. IC Role / Device Role / Timing Role: Simultaneous sampling ADC capturing synchronized analog waveforms to compute torque, flux, and efficiency metrics. Use Value: ≤4 ns aperture delay matching preserves phase relationships between current and voltage samples, enabling precise vector calculations at 50/60 Hz fundamental frequencies. | Use Scenario: Continuous measurement of voltage, current, active/reactive power, and harmonic content in smart energy meters. IC Role / Device Role / Timing Role: Four-channel front-end digitizer feeding FFT and RMS computation engines in metering SoCs or MCUs. Use Value: 77 dB SNR and 14-bit resolution support Class 0.2 accuracy compliance for revenue-grade metering under IEC 62053-22. |
| Uninterruptible Power Supplies (UPS) | Data Acquisition Systems |
Use Scenario: Monitoring input AC line, battery voltage, inverter output, and load current during transfer switching and battery discharge cycles. IC Role / Device Role / Timing Role: High-speed analog capture engine providing real-time feedback for PWM modulation and state-of-charge estimation. Use Value: 100 kSPS full four-channel throughput ensures <10 µs update latency for fast-acting protection logic and seamless transfer decisions. | Use Scenario: Modular test equipment acquiring vibration, temperature, pressure, and strain signals from multiple sensors in lab or field environments. IC Role / Device Role / Timing Role: Precision digitization node in distributed DAQ architectures, often paired with FPGA or ARM-based controllers. Use Value: Straight-binary coding and parallel interface reduce firmware overhead, enabling deterministic 14-bit sampling at sustained >100 kSPS rates across all channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7656ASTZ | 6-channel, 16-bit, 250 kSPS, SPI interface, no internal reference - requires external REF and serial interface logic. | Higher resolution but lower channel count and no native parallel bus - better suited for precision instrumentation than real-time motor control. | Select AD7656ASTZ when 16-bit resolution and six channels outweigh need for parallel interface and internal reference. |
| ADS8588SIPM | 8-channel, 16-bit, 100 kSPS, SPI interface, integrated reference, –40°C to +125°C rating - uses serial interface and different power architecture. | Greater channel density and extended temperature range, but lacks simultaneous sampling guarantee across all eight channels per datasheet. | Select ADS8588SIPM when higher channel count and extended temp range justify trade-offs in interface complexity and guaranteed simultaneity. |
Compared with AD7865YS-2, AD7656ASTZ offers higher resolution but fewer channels and no internal reference or parallel interface, increasing system design effort; ADS8588SIPM provides more channels and wider temperature range but uses SPI and does not guarantee full 8-channel simultaneity, limiting phase-critical use cases.
Availability
AD7865YS-2 is available at Aetrix Electronics and suitable for industrial power meters, AC motor control systems, uninterruptible power supplies, and embedded data acquisition requiring stable component supply across extended temperature ranges.
Supply support for AD7865YS-2 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 AD7865 product line delivers simultaneous-sampling, multi-channel precision ADCs optimized for real-time closed-loop control and power quality analysis where inter-channel timing integrity is non-negotiable.
FAQ
What input voltage ranges does the AD7865YS-2 support?
The AD7865YS-2 supports unipolar analog input ranges of 0 V to 2.5 V and 0 V to 5 V only - it does not support bipolar (±) ranges. This is confirmed in the Ordering Guide and Specifications tables of the official Rev. B datasheet. The "YS-2" suffix explicitly denotes the unipolar version with ±2 LSB relative accuracy over –40°C to +105°C.
Does the AD7865YS-2 include an internal voltage reference?
Yes, the AD7865YS-2 integrates a 2.5 V reference with ±20 mV error over temperature and 25 ppm/°C drift. The VREF pin serves as both output and input, allowing overdrive by an external reference if higher precision is required. This internal reference eliminates the need for external components in most unipolar applications.
How is simultaneous sampling implemented in the AD7865YS-2?
The AD7865YS-2 achieves true simultaneous sampling using four independent track/hold amplifiers - one per differential input pair (VIN1A/B through VIN4A/B). A single CONVST rising edge freezes all four holds at the exact same instant, preserving phase relationships. Aperture delay matching is guaranteed ≤4 ns, ensuring sub-degree phase error at 50 kHz.
What is the function of the VDRIVE pin on the AD7865YS-2?
The VDRIVE pin supplies power to the AD7865YS-2's digital output drivers (DB0–DB13, BUSY, EOC, FRSTDATA). It can be tied to DVDD (5 V) or driven with 3 V ±10%, enabling direct interfacing with 3 V processors without external level shifters - a key feature for mixed-voltage system designs.
Can the AD7865YS-2 operate with an external clock source?
Yes, the AD7865YS-2 supports external clocking via the CLK IN/SL1 pin when INT/EXT CLK/SL2 is set high. A 5 MHz external clock yields 3.2 µs conversion time. However, the internal oscillator is optimized for 2.4 µs conversion and is recommended for maximum throughput and lowest jitter in timing-critical applications like motor control.
AD7865YS-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 44-QFP
- Packaging:
- Bag
- Product Status:
- Obsolete
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 350k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- Parallel
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 44-MQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7865YS-2 FAQ
1.How can I place an order for AD7865YS-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7865YS-2 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 AD7865YS-2 reliable?
The price and inventory of AD7865YS-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7865YS-2 is usually 5 days.
3.What payment methods are accepted for AD7865YS-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7865YS-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7865YS-2?
AD7865YS-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7865YS-2 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 AD7865YS-2?
For technical support, including AD7865YS-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7865YS-2 requirements.
6.How does Aetrix verify that AD7865YS-2 is sourced from the original manufacturer or authorized distributors?
All AD7865YS-2 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 AD7865YS-2 meets industry standards.
7.What is the process for return or replacement of AD7865YS-2?
All AD7865YS-2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7865YS-2, 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 AD7865YS-2 part is unused and in its original packaging.
Return procedure for AD7865YS-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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