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Analog Devices Inc. AD7862ANZ-3
- Part No.:
- AD7862ANZ-3
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
AD7862ANZ-3.pdf
- Description:
- IC ADC 12BIT DUAL 250KSPS 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:685
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Product details
Overview
AD7862ANZ-3 from Analog Devices is a dual-channel, simultaneous-sampling 12-bit analog-to-digital converter (ADC) with ±2.5 V input range, 250 kSPS throughput, 3.6 µs conversion time, and integrated +2.5 V reference - designed for phase-critical signal acquisition in motor control and power monitoring systems.
For engineers reviewing the AD7862ANZ-3 datasheet, AD7862ANZ-3 pinout, AD7862ANZ-3 application, or AD7862ANZ-3 equivalent, this page delivers verified specifications, validated pin functions, confirmed timing behavior, real-world use cases, and two technically documented alternative parts for design continuity.
Technical Context
The AD7862ANZ-3 integrates two independent successive-approximation ADCs, each paired with a track-and-hold amplifier, enabling true simultaneous sampling of VA1/VA2 and VB1/VB2 channels. Its internal laser-trimmed clock oscillator eliminates external timing components, and aperture delay matching of ≤200 ps preserves inter-channel phase integrity.
It operates from a single +5 V supply, uses twos-complement output coding, and features overvoltage protection allowing ±7 V on analog inputs without damage. The high-speed parallel interface (12-bit bus, CS/RD/CONVST control) supports direct connection to microcontrollers and DSPs without glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes and supports 4096 discrete amplitude levels per channel. |
| Sampling Rate | 250 kSPS - enables full-bandwidth capture of signals up to 125 kHz (Nyquist-limited). |
| Input Range | ±2.5 V - matches common signal-processing stages and op-amp output rails in industrial sensing. |
| Conversion Time | 3.6 µs - defines minimum inter-conversion interval and sets maximum sustained throughput. |
| Relative Accuracy | ±1 LSB max - ensures monotonicity and end-point linearity critical for closed-loop control feedback. |
| SNR | 70 dB min @ 100 kHz - supports >11.5 effective number of bits (ENOB) in dynamic signal acquisition. |
| Power Dissipation | 60 mW typ - enables integration into thermally constrained embedded systems without active cooling. |
Pinout & Package
AD7862ANZ-3 is housed in a 28-pin plastic DIP (N-28 package), with dual AGND pins (16 and 27), dedicated analog/digital ground separation, and TTL-compatible three-state data outputs (DB0–DB11).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28 | NC | No internal connection - must remain unconnected; no routing or grounding required. |
| 2–9, 11–15, 19–22, 24–26 | DB11–DB0, CONVST, A0, CS, RD, BUSY, VDD, VA1, VB1, VA2, VB2, VREF | Functional I/O - DBx carry 12-bit twos-complement results; CONVST initiates synchronized hold/conversion; A0 selects channel group (A/B) for read sequence. |
| 7, 16, 27 | DGND, AGND, AGND | Ground references - DGND serves digital logic; AGND (dual) isolates analog front-end and reference circuitry to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling & conversion | Preserves phase relationship between VA1/VA2 and VB1/VB2 - essential for vector control in AC motor drives. |
| Integrated +2.5 V reference | ±10 mV error at +25°C, 25 ppm/°C drift - eliminates need for external reference in cost-sensitive designs. |
| Overvoltage protection | Withstands ±7 V on analog inputs - protects against transients in industrial power monitoring without external clamping. |
| Aperture delay matching | ≤200 ps between channels - enables multi-device synchronization for >4-channel acquisition systems. |
| Auto power-down mode | Reduces standby current to 25 µA - extends battery life in portable data loggers and field instruments. |
Applications
| AC Motor Control | Uninterruptible Power Supply (UPS) |
|---|---|
Use Scenario: Real-time measurement of phase currents and DC bus voltage in three-phase inverter stacks. IC Role / Device Role / Timing Role: Dual simultaneous sampling captures current and voltage waveforms with sub-200 ps inter-channel skew to compute instantaneous power and torque. Use Value: Enables precise field-oriented control (FOC) by preserving phase coherence between current and voltage feedback paths. |
Use Scenario: Monitoring input AC line voltage, battery voltage, and inverter output during transfer switching and harmonic distortion analysis. IC Role / Device Role / Timing Role: Simultaneous sampling of line and load voltages allows cycle-by-cycle RMS calculation and THD assessment without time-interleaving artifacts. Use Value: Supports fast detection of grid anomalies and accurate waveform reconstruction for compliance reporting (e.g., IEEE 519). |
| Data Acquisition Systems | Communications Baseband Processing |
Use Scenario: Multi-sensor monitoring in industrial PLCs, including temperature, pressure, and vibration transducers with differential outputs. IC Role / Device Role / Timing Role: Four-input architecture (VA1/VA2/VB1/VB2) acquires two differential pairs synchronously using A0 multiplexing. Use Value: Eliminates channel-to-channel timing skew that would corrupt common-mode rejection in sensor bridge measurements. |
Use Scenario: Digitizing I/Q baseband signals from RF demodulators in software-defined radio (SDR) front-ends. IC Role / Device Role / Timing Role: Simultaneous sampling of in-phase (I) and quadrature (Q) analog paths preserves complex signal integrity for coherent demodulation. Use Value: Maintains <1° phase error across 100 kHz bandwidth - critical for maintaining EVM in QAM-64 and higher-order modulation schemes. |
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 |
|---|---|---|---|
| AD7863ARZ-3 | 14-bit resolution, same pinout and timing, ±2.5 V input range, higher SNR (74 dB), 1.5× power consumption (90 mW). | Required where higher dynamic range is needed for low-amplitude signal detection in noisy environments. | Select AD7863ARZ-3 when ENOB > 12 bits is mandatory and layout reuse is prioritized. |
| ADS8364IPAG | 6-channel simultaneous sampling, 16-bit resolution, SPI interface, no internal reference, requires external REF3025. | Suitable for systems needing >2 channels or higher precision, but demands additional reference and level-shifting circuitry. | Choose ADS8364IPAG only when expanding channel count beyond four or requiring >12-bit accuracy with external calibration. |
Compared with AD7862ANZ-3, AD7863ARZ-3 offers higher resolution in identical packaging and timing, while ADS8364IPAG trades pin compatibility for greater channel density and precision at the cost of increased BOM complexity and interface redesign.
Availability
AD7862ANZ-3 is available at Aetrix Electronics and suitable for AC motor control, uninterruptible power supplies, and industrial data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7862ANZ-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, founded in 1965 and headquartered in Wilmington, MA.
The AD7862 product line was engineered specifically for real-time, phase-coherent digitization in industrial automation and power electronics - emphasizing simultaneous sampling, robust input protection, and single-supply operation.
FAQ
What is the absolute maximum analog input voltage for AD7862ANZ-3?
The AD7862ANZ-3 supports ±7 V on its analog inputs (VA1, VA2, VB1, VB2) without damage, exceeding its specified ±2.5 V operating range. This overvoltage tolerance applies under all conditions and is enabled by internal protection circuitry - critical for surviving transient surges in motor drive and UPS applications where AD7862ANZ-3 is commonly deployed.
Does AD7862ANZ-3 require an external reference voltage?
No, AD7862ANZ-3 includes an internal +2.5 V reference with ±10 mV accuracy at +25°C and 25 ppm/°C temperature coefficient. The VREF pin can be used as an output (with 0.1 µF decoupling to AGND) or accept an external reference like AD780 for tighter stability. Using the internal reference simplifies design and reduces BOM count for AD7862ANZ-3 implementations.
How does the A0 pin control data readout sequencing in AD7862ANZ-3?
In AD7862ANZ-3, the A0 pin selects which channel pair is accessed during consecutive reads: when A0 = low, the first RD pulse after CONVST returns VA1 or VB1 data; the second RD pulse returns VA2 or VB2. When A0 = high, the same sequence reads from Channel B instead. This allows interleaved access to both channels without reconfiguring hardware - a key feature of AD7862ANZ-3's parallel interface.
What is the significance of aperture delay matching in AD7862ANZ-3?
AD7862ANZ-3 specifies ≤200 ps aperture delay matching between its two track-and-hold amplifiers. This ensures that VA1/VA2 and VB1/VB2 samples are acquired within 200 ps - preserving phase relationships critical for vector calculations in motor control and power quality analysis. This tight matching is factory-trimmed and guaranteed across temperature, making AD7862ANZ-3 suitable for multi-device synchronization.
Can AD7862ANZ-3 operate from a single +5 V supply?
Yes, AD7862ANZ-3 is fully specified for single +5 V ±5% operation, drawing 15 mA typical in normal mode (60 mW). Its LC2MOS process integrates analog and digital circuitry on one die without requiring split supplies. This simplifies power design in embedded systems and eliminates the need for negative rails - a defining characteristic of AD7862ANZ-3 versus older dual-supply ADCs.
AD7862ANZ-3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- Parallel
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 2
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7862ANZ-3 FAQ
1.How can I place an order for AD7862ANZ-3 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7862ANZ-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 AD7862ANZ-3 reliable?
The price and inventory of AD7862ANZ-3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7862ANZ-3 is usually 5 days.
3.What payment methods are accepted for AD7862ANZ-3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7862ANZ-3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7862ANZ-3?
AD7862ANZ-3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7862ANZ-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 AD7862ANZ-3?
For technical support, including AD7862ANZ-3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7862ANZ-3 requirements.
6.How does Aetrix verify that AD7862ANZ-3 is sourced from the original manufacturer or authorized distributors?
All AD7862ANZ-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 AD7862ANZ-3 meets industry standards.
7.What is the process for return or replacement of AD7862ANZ-3?
All AD7862ANZ-3 units undergo pre-shipment inspection (PSI). If there is an issue with AD7862ANZ-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 AD7862ANZ-3 part is unused and in its original packaging.
Return procedure for AD7862ANZ-3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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