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Analog Devices Inc. AD7863ARSZ-2REEL7
- Part No.:
- AD7863ARSZ-2REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD7863ARSZ-2REEL7.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,963
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Product details
Overview
AD7863ARSZ-2REEL7 from Analog Devices is a dual-channel, simultaneous-sampling 14-bit analog-to-digital converter (ADC) operating from a single 5 V supply. It delivers 175 kSPS throughput per channel with 5.2 μs conversion time, ±2.5 V input range (AD7863-3 variant), and integrated 2.5 V reference - used in motor control feedback loops requiring phase-coherent sampling of current and voltage waveforms.
For engineers reviewing the AD7863ARSZ-2REEL7 datasheet, AD7863ARSZ-2REEL7 pinout, AD7863ARSZ-2REEL7 application, or AD7863ARSZ-2REEL7 equivalent, key selection criteria include simultaneous dual-channel acquisition timing, aperture delay matching (<350 ps), parallel interface timing compliance, and bipolar ±2.5 V input range support with overvoltage tolerance up to ±7 V.
Technical Context
The AD7863ARSZ-2REEL7 integrates two independent successive-approximation ADCs, each paired with a track-and-hold amplifier and sharing a common internal 2.5 V reference. Its dual-channel architecture enables true simultaneous sampling of VA1/VA2 or VB1/VB2 via A0 multiplexer select, preserving inter-channel phase integrity for vector-controlled drives and power quality analyzers.
Conversion is initiated by a falling edge on CONVST, triggering both track-and-holds into hold mode and starting concurrent conversions. BUSY remains high for 5.2 μs (Mode 1), after which results are read sequentially via 14-bit parallel bus (DB0–DB13) using CS and RD strobes - supporting direct interfacing with ADSP-210x, TMS320C25, and MC68000 processors without glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - guarantees monotonic output with no missing codes across full temperature range. |
| Sampling Rate | 175 kSPS per channel - supports real-time capture of 80 kHz sine inputs with ≥77 dB SNR. |
| Conversion Time | 5.2 μs (Mode 1) - defines minimum inter-conversion interval for sustained high-throughput operation. |
| Analog Input Range | ±2.5 V - matches standard signal processing levels; allows direct connection to op-amp outputs without level-shifting. |
| Aperture Delay Matching | ≤350 ps - ensures <0.02° phase error at 100 kHz between sampled channels, critical for encoderless FOC. |
| Power Dissipation | 70 mW typical (Mode 1) - enables integration into thermally constrained industrial I/O modules. |
| Overvoltage Tolerance | ±7 V on analog inputs - protects against transient coupling in noisy motor drive environments. |
Pinout & Package
AD7863ARSZ-2REEL7 is housed in a 28-lead SOIC_W (Wide) package (body width 7.5 mm), RoHS-compliant, tape-and-reel format (REEL7 = 1,000-piece reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Convert Start Input | Falling-edge-triggered global sample command - simultaneously freezes both track-and-holds and initiates dual conversion. |
| A0 | Multiplexer Select | Configures channel pair: low → VA1/VA2; high → VB1/VB2 - enables interleaved dual-sensor monitoring. |
| BUSY | Conversion Status Output | Active-high open-drain signal indicating conversion in progress; synchronizes read timing with processor wait states. |
| CS / RD | Chip Select & Read Strobe | Standard parallel interface controls - CS enables device; RD latches first/second 14-bit result from VA1/VB1 then VA2/VB2. |
| DB0–DB13 | Data Bus Outputs | Three-state TTL-compatible outputs delivering twos-complement codes (AD7863-3); MSB = DB13, LSB = DB0. |
| VREF | Reference I/O | 2.5 V nominal internal reference output; can be overdriven by external precision reference to improve gain accuracy. |
| AGND / DGND | Analog & Digital Grounds | Separate ground pins require star-point connection to minimize digital noise coupling into analog conversion path. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous Sampling | Two independent track-and-hold amplifiers acquire VA1/VA2 or VB1/VB2 at identical instants - preserves phase relationships for vector control algorithms. |
| Integrated Reference | On-chip 2.5 V bandgap reference with ±10 mV initial error and 25 ppm/°C drift - eliminates external reference component while maintaining ±2 LSB gain error. |
| Overvoltage Protection | Analog inputs withstand ±7 V transients (AD7863-3) without latch-up or parametric shift - reduces need for external clamping diodes in industrial field wiring. |
| Low-Power Operation | 70 mW typical active power and 105 μW max power-down mode - extends battery life in portable power analyzers and handheld test equipment. |
| High-Speed Parallel Interface | 14-bit bus with 35 ns minimum CONVST pulse width and 30 ns data access time - interfaces directly to 80C196, ADSP-2101, and TMS320C25 without wait-state insertion. |
Applications
| Motor Control Feedback | Power Quality Monitoring |
|---|---|
Use Scenario: Real-time acquisition of phase current and bus voltage in three-phase inverter systems for field-oriented control (FOC). IC Role / Device Role / Timing Role: Dual simultaneous sampling ADC capturing synchronized current/voltage pairs at 175 kSPS to compute instantaneous torque and flux vectors. Use Value: Aperture delay matching ≤350 ps ensures <0.02° phase error at 10 kHz, enabling precise rotor position estimation without encoder. |
Use Scenario: Continuous waveform capture of AC mains voltage and current for harmonic distortion analysis per IEEE 519. IC Role / Device Role / Timing Role: Simultaneous sampling of voltage and current channels preserves zero-crossing alignment required for THD and intermodulation calculations. Use Value: 77 dB SNR at 80 kHz input enables accurate measurement of 30th harmonic (2.4 kHz) with >60 dB dynamic range margin. |
| Industrial Data Acquisition | Test & Measurement Equipment |
Use Scenario: Multi-sensor monitoring in PLC analog input modules handling vibration, temperature, and pressure signals. IC Role / Device Role / Timing Role: Dual ADC channels serve as independent 14-bit digitizers for two sensor types, reducing channel count per IC and simplifying calibration. Use Value: ±2.5 V input range matches standard 4–20 mA loop receiver outputs; 0.5 μs track/hold acquisition time supports rapid channel switching. |
Use Scenario: High-fidelity waveform digitization in portable oscilloscopes and spectrum analyzers requiring low-noise, phase-coherent sampling. IC Role / Device Role / Timing Role: ADC core providing 14-bit resolution and 175 kSPS rate with minimal aperture jitter (50 ps typ) for time-domain fidelity. Use Value: −82 dB THD and −86 dB channel isolation prevent crosstalk-induced artifacts during multi-channel FFT analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel 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 level-shifting for ±2.5 V range. | Higher resolution but serial interface increases MCU overhead; better suited for high-accuracy static measurements than real-time control. | Select when 16-bit resolution and 6-channel density outweigh need for parallel interface and simultaneous dual-channel simplicity. |
| ADS8364IPAG | 6-channel, 16-bit, 250 kSPS, parallel interface, internal 2.5 V reference - supports ±2.5 V input but lacks simultaneous sampling across all channels (only 2 groups of 3). | Group-simultaneous sampling limits phase coherence between non-paired channels; suitable for multi-phase power metering but not FOC. | Select when system requires >2 simultaneous channels and can accept staggered group sampling within 10 ns skew. |
Compared with AD7863ARSZ-2REEL7, AD7656ASTZ offers higher resolution and channel count but demands more complex digital interfacing and external reference management, while ADS8364IPAG provides greater channel density yet sacrifices true four-channel simultaneity - making AD7863ARSZ-2REEL7 optimal for cost-sensitive, phase-critical dual-sensor applications.
Availability
AD7863ARSZ-2REEL7 is available at Aetrix Electronics and suitable for motor control feedback, power quality monitoring, industrial data acquisition, and portable test equipment requiring stable component supply and long-term obsolescence planning.
Supply support for AD7863ARSZ-2REEL7 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 AD7863 belongs to Analog Devices' precision high-speed data acquisition product line, engineered specifically for industrial automation and real-time control systems demanding deterministic sampling, low latency, and robust noise immunity.
FAQ
What input voltage range does the AD7863ARSZ-2REEL7 support?
The AD7863ARSZ-2REEL7 is the AD7863-3 variant and supports a bipolar ±2.5 V analog input range. This matches standard op-amp output levels in signal conditioning circuits and enables direct interface with isolated amplifiers without level-shifting. Overvoltage protection allows inputs to reach ±7 V without damage, enhancing ruggedness in industrial environments where transients occur.
How does the AD7863ARSZ-2REEL7 achieve simultaneous sampling across two channels?
The AD7863ARSZ-2REEL7 achieves true simultaneous sampling using two independent track-and-hold amplifiers that respond identically to the falling edge of the CONVST signal. Both amplifiers freeze their respective input voltages (e.g., VA1 and VA2) at precisely the same instant, preserving relative phase information. Aperture delay matching is guaranteed ≤350 ps, ensuring sub-degree phase error at 100 kHz - a capability confirmed in the AD7863 datasheet Rev. B timing specifications.
Can the AD7863ARSZ-2REEL7 operate with an external reference?
Yes, the AD7863ARSZ-2REEL7 supports external reference operation via the VREF pin. The internal 2.5 V reference can be overridden by connecting a precision external reference (2.375 V to 2.625 V) to VREF. Doing so improves gain accuracy and temperature stability beyond the internal reference's ±10 mV (25°C) and 25 ppm/°C specs - a documented configuration in the AD7863 Rev. B Reference Section.
What is the power consumption profile of the AD7863ARSZ-2REEL7 in active and power-down modes?
The AD7863ARSZ-2REEL7 consumes 70 mW typical in normal Mode 1 operation (18 mA at 5 V), dropping to 105 μW maximum in power-down Mode 2. The automatic sleep mode activates after conversion completion and wakes before the next CONVST pulse - verified in the Power Requirements table of Rev. B. This makes AD7863ARSZ-2REEL7 suitable for battery-powered portable instrumentation where duty-cycled acquisition is employed.
Is the AD7863ARSZ-2REEL7 pin-compatible with other members of the AD7863 family?
Yes, all AD7863 variants - including AD7863-2, AD7863-3, and AD7863-10 - share identical pinout, package (28-lead SOIC_W), and parallel interface timing. The only differences are input range configuration (set by internal scaling resistors) and output coding (twos-complement for AD7863-3). This allows drop-in replacement in existing designs when changing input range requirements, as confirmed in the AD7863 Rev. B Pin Configuration section and Ordering Guide.
AD7863ARSZ-2REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 175k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- 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:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7863ARSZ-2REEL7 FAQ
1.How can I place an order for AD7863ARSZ-2REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7863ARSZ-2REEL7 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 AD7863ARSZ-2REEL7 reliable?
The price and inventory of AD7863ARSZ-2REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7863ARSZ-2REEL7 is usually 5 days.
3.What payment methods are accepted for AD7863ARSZ-2REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7863ARSZ-2REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7863ARSZ-2REEL7?
AD7863ARSZ-2REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7863ARSZ-2REEL7 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 AD7863ARSZ-2REEL7?
For technical support, including AD7863ARSZ-2REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7863ARSZ-2REEL7 requirements.
6.How does Aetrix verify that AD7863ARSZ-2REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7863ARSZ-2REEL7 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 AD7863ARSZ-2REEL7 meets industry standards.
7.What is the process for return or replacement of AD7863ARSZ-2REEL7?
All AD7863ARSZ-2REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7863ARSZ-2REEL7, 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 AD7863ARSZ-2REEL7 part is unused and in its original packaging.
Return procedure for AD7863ARSZ-2REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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