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Analog Devices Inc. AD7865YSZ-3
- Part No.:
- AD7865YSZ-3
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 44-QFP
- Datasheet:
-
AD7865YSZ-3.pdf
- Description:
- IC ADC 14BIT SAR 44MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,094
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Product details
Overview
AD7865YSZ-3 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, ±2.5 V input range, and 77 dB SNR at 100 kHz input - enabling precise phase-coherent acquisition in motor control feedback loops.
For engineers reviewing the AD7865YSZ-3 datasheet, AD7865YSZ-3 pinout, AD7865YSZ-3 application, or AD7865YSZ-3 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options for industrial signal acquisition systems requiring tight aperture delay matching (<4 ns) and automotive-grade temperature operation (–40°C to +105°C).
Technical Context
The AD7865YSZ-3 implements a successive approximation ADC architecture with on-chip 2.5 V reference, internal clock oscillator, and parallel 14-bit data interface. Its four independent track/hold amplifiers sample simultaneously, preserving inter-channel phase relationships critical for vector-controlled AC drives.
Channel selection is configurable via hardware (SL1–SL4 pins) or software (DB0–DB3 register write), with conversion triggered by CONVST rising edge. BUSY remains high across the full sequence; EOC pulses low after each individual channel's 2.4 µs conversion completes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete output levels for high-fidelity waveform digitization |
| Conversion Time | 2.4 µs per channel - enables 100 kSPS aggregate throughput across all four channels |
| Analog Input Range | ±2.5 V - optimized for signal processing applications with bipolar baseband signals |
| SNR | 77 dB min at fIN = 100 kHz - ensures >12.5 effective bits under dynamic conditions |
| Aperture Delay Matching | 4 ns max - maintains <0.02° phase error at 1 MHz between channels for accurate vector math |
| Supply Voltage | 5 V ±5% - single-rail operation simplifies power design versus dual-supply ADCs |
| Operating Temperature | –40°C to +105°C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
AD7865YSZ-3 is housed in a 44-lead Plastic Quad Flatpack (PQFP) with 0.8 mm lead pitch and 10 mm × 10 mm body size. 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; deasserted only after final channel conversion completes - used to gate read operations |
| CONVST (Pin 3) | Asynchronous start input | Rising-edge-triggered; latches channel selection mode (H/S SEL) and initiates simultaneous hold + conversion sequence |
| EOC (Pin 44) | Per-channel completion flag | Active-low pulse marks end of each individual channel's 2.4 µs conversion - enables pipelined reads |
| VIN1A/VIN1B to VIN4A/VIN4B (Pins 13–16, 18–21) | Differential analog inputs | Four fully independent input pairs support simultaneous sampling; ±2.5 V range with ±18 V overvoltage tolerance |
| DB0–DB13 (Pins 37–43, 27–34) | 14-bit parallel data bus | Three-state TTL outputs; twos-complement coding for AD7865YSZ-3; supports direct interfacing to 5 V or 3 V microcontrollers via VDRIVE |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling | Four independent track/hold amplifiers preserve phase coherence across channels - essential for FFT-based analysis and field-oriented control |
| Automotive temperature grade | –40°C to +105°C operation (Y-grade) - qualified for engine control units and traction inverters without derating |
| Hardware/software channel selection | H/S SEL pin selects between SL1–SL4 hardware configuration or DB0–DB3 register programming - enables flexible system-level integration |
| Internal 2.5 V reference | ±20 mV accuracy over temperature - eliminates external reference component while maintaining 14-bit linearity (±2 LSB INL) |
| Low-power standby mode | 20 µA typical quiescent current - reduces system power during idle periods without losing configuration state |
Applications
| Motor Control Feedback | Power Quality Monitoring |
|---|---|
Use Scenario: Real-time acquisition of three-phase current and DC-link voltage in an IGBT-based inverter for field-oriented control. IC Role / Device Role / Timing Role: Simultaneous sampling ADC capturing synchronized analog waveforms to compute rotor flux angle and torque commands. Use Value: 4 ns aperture delay matching ensures <0.02° phase error at 1 kHz, enabling precise vector rotation and minimizing torque ripple. | Use Scenario: Continuous monitoring of voltage/current harmonics in industrial distribution panels using Class A power analyzers. IC Role / Device Role / Timing Role: Four-channel digitizer acquiring line-to-line voltages and neutral current with deterministic timing alignment. Use Value: 77 dB SNR and –86 dB THD support IEC 61000-4-30 Class A compliance for harmonic distortion measurement up to 50th order. |
| Automotive Battery Management | Industrial Data Acquisition |
Use Scenario: High-voltage battery pack monitoring in EV powertrain ECUs, measuring cell stack voltages and temperature sensor outputs. IC Role / Device Role / Timing Role: Simultaneous-sampling ADC converting isolated analog signals from precision shunt amplifiers and thermistor interfaces. Use Value: ±18 V absolute maximum input rating protects against transients during load dump; –40°C to +105°C rating ensures reliability in under-hood environments. | Use Scenario: Modular test equipment capturing transient waveforms from vibration sensors, pressure transducers, and strain gauges in predictive maintenance systems. IC Role / Device Role / Timing Role: High-speed front-end ADC providing synchronized multi-sensor data for edge-based FFT and anomaly detection. Use Value: 100 kSPS aggregate throughput across four channels enables 25 kSPS per channel - sufficient for 10 kHz anti-aliasing bandwidth with oversampling. |
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/ch, SPI interface, no internal reference | Higher resolution but serial interface increases MCU overhead; requires external 2.5 V reference | Choose when 16-bit resolution and six channels outweigh parallel interface simplicity |
| ADS8588HIPM | 8-channel, 16-bit, 100 kSPS/ch, ±10 V input range, integrated reference | Wider input range and more channels, but larger 64-pin HTQFP package and higher 220 mW power | Prefer when scaling to eight synchronized inputs and ±10 V sensor compatibility is required |
Compared with AD7865YSZ-3, AD7656ASTZ trades parallel simplicity for higher resolution and channel count at the cost of added interface complexity, while ADS8588HIPM expands channel density and input range but increases board area and thermal load - making AD7865YSZ-3 optimal for compact, low-power, four-channel automotive and industrial systems demanding guaranteed phase alignment.
Availability
AD7865YSZ-3 is available at Aetrix Electronics and suitable for motor control feedback, power quality monitoring, automotive battery management, and industrial data acquisition requiring stable component supply across extended temperature ranges.
Supply support for AD7865YSZ-3 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 since 1965.
The AD7865YSZ-3 belongs to Analog Devices' precision simultaneous-sampling ADC product line, engineered specifically for closed-loop control systems where inter-channel timing integrity and automotive-grade reliability are non-negotiable.
FAQ
What is the maximum sampling rate achievable with AD7865YSZ-3 across all four channels?
The AD7865YSZ-3 achieves a maximum aggregate throughput of 100 kSPS when converting all four channels in sequence. This is derived from its fixed 2.4 µs conversion time per channel and sequential execution - meaning each full 4-channel cycle completes in 9.6 µs. The device does not support true interleaved or pipelined multi-channel operation beyond this bound.
Does AD7865YSZ-3 require an external reference voltage?
No, AD7865YSZ-3 integrates a laser-trimmed 2.5 V reference with ±20 mV accuracy over temperature. It can operate fully autonomously using this internal reference. The VREF pin allows optional overdriving with an external 2.5 V ±5% source if higher initial accuracy or lower drift is required, but it is not mandatory for functional operation.
How is channel selection configured on AD7865YSZ-3?
Channel selection on AD7865YSZ-3 is controlled by the H/S SEL pin. When H/S SEL = 0, hardware mode activates: SL1–SL4 pins directly enable/disable channels 1–4. When H/S SEL = 1, software mode activates: DB0–DB3 are written via WR/CS to program the channel select register. In both modes, the selection is latched on the rising edge of CONVST.
What is the purpose of the FRSTDATA pin on AD7865YSZ-3?
The FRSTDATA pin on AD7865YSZ-3 is a logic output that goes high to indicate the Output Data Register Pointer is addressing Register 1 - i.e., the first valid conversion result is ready on the DB0–DB13 bus. It provides precise synchronization for reading the earliest channel result without polling BUSY or EOC, reducing software latency in time-critical control loops.
Can AD7865YSZ-3 interface directly with 3 V microcontrollers?
Yes, AD7865YSZ-3 supports direct 3 V interfacing via the VDRIVE pin. By powering VDRIVE at 3 V ±10%, the DB0–DB13 data outputs, BUSY, EOC, and FRSTDATA signals comply with 3 V logic thresholds while AVDD/DVDD remain at 5 V. This eliminates level-shifting components and preserves timing margins for high-speed parallel reads.
AD7865YSZ-3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 44-QFP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 350k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-MUX-ADC
- Ratio - S/H:ADC:
- 4:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 44-MQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7865YSZ-3 FAQ
1.How can I place an order for AD7865YSZ-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7865YSZ-3 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 AD7865YSZ-3 reliable?
The price and inventory of AD7865YSZ-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7865YSZ-3 is usually 5 days.
3.What payment methods are accepted for AD7865YSZ-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7865YSZ-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7865YSZ-3?
AD7865YSZ-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7865YSZ-3 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 AD7865YSZ-3?
For technical support, including AD7865YSZ-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7865YSZ-3 requirements.
6.How does Aetrix verify that AD7865YSZ-3 is sourced from the original manufacturer or authorized distributors?
All AD7865YSZ-3 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 AD7865YSZ-3 meets industry standards.
7.What is the process for return or replacement of AD7865YSZ-3?
All AD7865YSZ-3 units undergo pre-shipment inspection (PSI). If there is an issue with AD7865YSZ-3, 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 AD7865YSZ-3 part is unused and in its original packaging.
Return procedure for AD7865YSZ-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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