My Inquiry
My Account
Analog Devices Inc. AD7862ARSZ-2
- Part No.:
- AD7862ARSZ-2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD7862ARSZ-2.pdf
- Description:
- IC ADC 12BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,731
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7862ARSZ-2 from Analog Devices is a dual 12-bit simultaneous-sampling analog-to-digital converter (ADC) with four analog inputs (VA1/VA2/VB1/VB2), unipolar 0 V to +2.5 V input range, 3.6 µs conversion time, and high-speed parallel interface. It preserves phase coherence between channels for motor control and power monitoring applications.
For engineers reviewing the AD7862ARSZ-2 datasheet, AD7862ARSZ-2 pinout, AD7862ARSZ-2 application, or AD7862ARSZ-2 equivalent, this page delivers verified specifications, real-world timing behavior, channel-isolation performance, unipolar coding details, and validated alternatives for industrial data acquisition systems requiring synchronized dual-channel sampling.
Technical Context
The AD7862ARSZ-2 integrates two independent successive-approximation ADCs, each paired with a track-and-hold amplifier, enabling true simultaneous sampling of two analog channels (A and B). Its internal +2.5 V reference and straight binary output coding are fixed for the -2 variant.
Conversion is triggered by a falling edge on CONVST, initiating concurrent hold and conversion across both channels; BUSY remains high for 3.6 µs before results become available via the 12-bit parallel bus. The A0 multiplexer select determines whether VA1/VB1 or VA2/VB2 data is read first during sequential access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees no missing codes and supports 4096 discrete digital levels over full-scale range |
| Input Range | 0 V to +2.5 V unipolar - eliminates negative rail requirement and simplifies signal conditioning for single-supply systems |
| Conversion Time | 3.6 µs max - enables 250 kSPS throughput per channel with deterministic latency for closed-loop control |
| Relative Accuracy | ±1 LSB max - ensures end-point linearity within ±0.024% of full scale for precision measurement |
| Channel Isolation | –80 dB max at 100 kHz - suppresses crosstalk between VA and VB channels during simultaneous acquisition |
| Power Dissipation | 60 mW typ at +5 V - balances speed and efficiency for embedded industrial controllers |
| Aperture Delay Matching | 200 ps typ - maintains sub-degree phase alignment between sampled signals for vector analysis |
Pinout & Package
AD7862ARSZ-2 is housed in a 28-lead Shrink Small Outline Package (SSOP), RoHS-compliant, with exposed pad thermal enhancement. Pin 1 is marked via package notch; pins 1 and 28 are NC (no connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28 | NC | No internal connection - must remain unconnected per datasheet |
| 2–6, 9–15 | DB11–DB0 | 12-bit straight binary output bus - three-state TTL outputs active only when CS and RD are low and A0 selects channel |
| 7 | DGND | Digital ground reference - separate from AGND to minimize digital noise coupling into analog path |
| 8 | CONVST | Edge-triggered conversion start - falling edge places both track/holds into hold mode simultaneously |
| 16, 27 | AGND | Analog ground return - must be tied to system analog ground plane with low-inductance connection |
| 17, 18, 25, 26 | VB2, VA2, VA1, VB1 | Four analog inputs grouped as Channel A (VA1/VA2) and Channel B (VB1/VB2) - all accept 0 V to +2.5 V unipolar range |
| 19 | VREF | Reference I/O - internally generates +2.5 V; external reference may override it; requires 0.1 µF ceramic bypass to AGND |
| 20 | A0 | Multiplexer select - controls read sequence: A0 low reads VA1/VB1 first; A0 high reads VA2/VB2 first |
| 21 | CS | Chip select - active-low enable for parallel bus; must be asserted before RD to avoid bus contention |
| 22 | RD | Read strobe - active-low signal that latches DB11–DB0 data onto microcontroller/data bus |
| 23 | BUSY | Open-drain status indicator - high during conversion; falls at completion to signal data readiness |
| 24 | VDD | +5 V ±5% supply - powers analog and digital sections; decoupling required within 1 cm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling & conversion | Both channels acquire and convert in lockstep - preserves phase relationship for vector-based AC analysis |
| Unipolar 0 V to +2.5 V input range | Eliminates need for level-shifting circuitry in sensor interfaces and PLC analog input modules |
| Straight (natural) binary output coding | Direct mapping of 0x000–0xFFF to 0–2.5 V - simplifies firmware scaling and avoids two's complement sign handling |
| Overvoltage protection | +7 V absolute max on analog inputs - withstands transient surges without latch-up or damage in industrial environments |
| Aperture delay matching | 200 ps typical mismatch - enables accurate phase difference measurement between VA and VB signals |
Applications
| AC Motor Control | Uninterruptible Power Supply (UPS) |
|---|---|
Use Scenario: Real-time current and voltage sensing on motor phases to compute torque and flux vectors. IC Role / Device Role / Timing Role: Dual-channel ADC capturing synchronized current (VA1/VA2) and bus voltage (VB1/VB2) at 250 kSPS for field-oriented control loop. Use Value: 200 ps aperture matching ensures <0.1° phase error at 1 kHz, critical for accurate rotor position estimation. |
Use Scenario: Monitoring input AC line, battery voltage, and inverter output under load and fault conditions. IC Role / Device Role / Timing Role: Simultaneous sampling of grid voltage (VA1) and DC bus (VB1) to detect zero-crossing and regulate PWM timing. Use Value: 3.6 µs conversion enables <4 µs total latency - sufficient for fast transfer switching (<10 µs) during mains failure. |
| Data Acquisition Systems | Industrial Process Monitoring |
Use Scenario: Multi-sensor logging in environmental test chambers measuring temperature, pressure, and humidity. IC Role / Device Role / Timing Role: Dual-channel front-end digitizing differential thermocouple (VA1/VA2) and RTD bridge (VB1/VB2) outputs. Use Value: ±1 LSB relative accuracy over –40°C to +85°C ensures calibrated readings without per-unit trimming. |
Use Scenario: Continuous monitoring of pump vibration (accelerometer) and flow rate (differential pressure) in oil & gas pipelines. IC Role / Device Role / Timing Role: Synchronized capture of high-frequency vibration spectra (VA1) and slow-varying flow signals (VB1) for anomaly detection. Use Value: –80 dB channel isolation prevents flow signal modulation from corrupting spectral analysis of vibration harmonics. |
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 |
|---|---|---|---|
| AD7863ARSZ-2 | 14-bit resolution, same pinout and timing; higher SNR (72 dB vs. 70 dB), identical 0–2.5 V range and straight binary coding | Required where 0.06% full-scale resolution is needed for high-accuracy calibration or metrology-grade DAQ | Select AD7863ARSZ-2 when 14-bit precision justifies cost premium and board layout reuse is critical |
| ADS8364IPAG | 6-channel simultaneous sampling, 16-bit, SPI interface, no internal reference; requires external 2.5 V ref and level-shifting for 5 V logic | Suitable for multi-axis motion control or high-channel-count SCADA systems needing >2 channels per IC | Choose ADS8364IPAG when expanding beyond dual-channel or migrating to SPI-based microcontrollers |
Compared with AD7862ARSZ-2, AD7863ARSZ-2 offers 4× finer quantization without layout change, while ADS8364IPAG trades parallel simplicity for channel count and resolution at the cost of interface redesign and external reference dependency.
Availability
AD7862ARSZ-2 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 guaranteed traceable sourcing.
Supply support for AD7862ARSZ-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 since 1965.
The AD7862 product line delivers simultaneous-sampling dual ADCs optimized for real-time control and power quality monitoring, emphasizing phase coherence, robustness in noisy environments, and seamless integration with 5 V microcontrollers.
FAQ
What is the analog input voltage range supported by the AD7862ARSZ-2?
The AD7862ARSZ-2 supports a unipolar analog input range of 0 V to +2.5 V on all four inputs (VA1, VA2, VB1, VB2). This is distinct from the AD7862-10 (±10 V) and AD7862-3 (±2.5 V) variants. Input current is limited to 500 nA max, enabling direct connection to high-impedance sensors without buffering.
Does the AD7862ARSZ-2 use two's complement or straight binary output coding?
The AD7862ARSZ-2 uses straight (natural) binary output coding, as confirmed in the datasheet's "LOGIC OUTPUTS" section and "CONVERTER DETAILS". This means 0x000 corresponds to 0 V and 0xFFF corresponds to +2.5 V, simplifying firmware interpretation versus signed two's complement used in other variants.
How does the AD7862ARSZ-2 achieve simultaneous sampling across two channels?
The AD7862ARSZ-2 achieves true simultaneous sampling using two independent track-and-hold amplifiers, both placed into hold mode on the same falling edge of the CONVST signal. This ensures identical aperture delay and matching (200 ps typical) between VA and VB paths, preserving phase relationships for vector calculations.
What is the function of the A0 pin on the AD7862ARSZ-2?
The A0 pin on the AD7862ARSZ-2 serves as a multiplexer select that determines the read sequence of conversion results. When A0 is low during CS and RD assertion, the first read returns VA1 or VB1 data; when A0 is high, the first read returns VA2 or VB2 data - enabling flexible channel pairing without reconfiguration.
Can the AD7862ARSZ-2 operate with an external reference voltage?
Yes, the AD7862ARSZ-2 can accept an external +2.5 V reference applied to the VREF pin, which overrides the internal reference. The reference input is buffered and accepts ±100 µA max current. External references like the AD780 or REF43 are recommended for improved initial accuracy and temperature stability beyond the internal ±10 mV spec.
AD7862ARSZ-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 250k
- 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:
- -
AD7862ARSZ-2 FAQ
1.How can I place an order for AD7862ARSZ-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7862ARSZ-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 AD7862ARSZ-2 reliable?
The price and inventory of AD7862ARSZ-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7862ARSZ-2 is usually 5 days.
3.What payment methods are accepted for AD7862ARSZ-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7862ARSZ-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7862ARSZ-2?
AD7862ARSZ-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7862ARSZ-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 AD7862ARSZ-2?
For technical support, including AD7862ARSZ-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7862ARSZ-2 requirements.
6.How does Aetrix verify that AD7862ARSZ-2 is sourced from the original manufacturer or authorized distributors?
All AD7862ARSZ-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 AD7862ARSZ-2 meets industry standards.
7.What is the process for return or replacement of AD7862ARSZ-2?
All AD7862ARSZ-2 units undergo pre-shipment inspection (PSI). If there is an issue with AD7862ARSZ-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 AD7862ARSZ-2 part is unused and in its original packaging.
Return procedure for AD7862ARSZ-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7862ARSZ-2 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
