My Inquiry
My Account
Analog Devices Inc. AD7866ARUZ-REEL7
- Part No.:
- AD7866ARUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7866ARUZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,957
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7866ARUZ-REEL7 from Analog Devices is a dual-channel, 12-bit, 1 MSPS successive approximation ADC with integrated 2.5 V reference, serial SPI/QSPI/MICROWIRE/DSP-compatible interface, and simultaneous conversion capability across two independent analog input pairs (VA1/VA2 and VB1/VB2). It operates from a single 2.7 V to 5.25 V supply, delivers 70 dB SNR at 300 kHz input, and supports –40°C to +125°C industrial operation in a 20-lead TSSOP package.
For engineers reviewing the AD7866ARUZ-REEL7 datasheet, AD7866ARUZ-REEL7 pinout, AD7866ARUZ-REEL7 application, or AD7866ARUZ-REEL7 equivalent, this page provides verified technical context, real-world timing behavior, confirmed channel isolation (–88 dB), validated power consumption (11.4 mW @ 3 V / 1 MSPS), and precise reference configuration options - all critical for high-speed data acquisition system design.
Technical Context
The AD7866ARUZ-REEL7 implements two independent SAR ADC cores, each with its own track-and-hold amplifier supporting >10 MHz input bandwidth and 12 MHz full-power bandwidth. Conversion is initiated on the falling edge of CS, with sampling instant precisely controlled and no pipeline delay.
It features flexible reference architecture: internal 2.5 V reference (±1% initial accuracy, 50 ppm/°C drift) selectable via REF SELECT, or external reference applied to VREF, DCAPA, or DCAPB; analog input range is programmable as 0 V to VREF (straight binary) or –VREF to +VREF (twos complement) via RANGE pin sampled at CS fall.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.244 mV (for 0–2.5 V range) or 1.22 mV (for 0–5 V range) quantization step size |
| Throughput Rate | 1 MSPS - enables real-time sampling of signals up to 500 kHz Nyquist bandwidth per channel |
| SNR | 70 dB at 300 kHz input - ensures <0.1% RMS noise contribution relative to full-scale signal amplitude |
| Channel Isolation | –88 dB - prevents crosstalk-induced measurement error when monitoring differential or adjacent sensor channels |
| Power Dissipation | 11.4 mW max @ 3 V / 1 MSPS - allows thermally constrained embedded designs without forced cooling |
| Aperture Jitter | 50 ps typ - limits sampling uncertainty to <0.03 LSB at 100 kHz input, preserving dynamic performance |
| Integral Nonlinearity | ±1.5 LSB max - guarantees monotonicity and <0.036% end-point linearity error over full temperature range |
Pinout & Package
AD7866ARUZ-REEL7 is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP), RoHS-compliant, with 0.65 mm lead pitch and exposed pad not connected internally. Pin functions are validated per Analog Devices AD7866 Rev. A datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF SELECT) | Reference mode control | Selects internal 2.5 V reference (low) or external reference (high); determines decoupling capacitor placement on DCAPA/DCAPB |
| 6,7 (VA1, VA2) | ADC A analog inputs | Single-ended channels for simultaneous sampling; input range set by RANGE pin state at CS fall |
| 4,5 (VB1, VB2) | ADC B analog inputs | Independent single-ended channels; fully isolated from ADC A (–88 dB crosstalk) |
| 11 (RANGE) | Input range & coding select | Configures 0–VREF/straight binary or ±VREF/twos complement output on falling edge of CS |
| 15,16 (DOUTA, DOUTB) | Serial data outputs | Simultaneous 16-bit frames (1 zero + 3 status + 12 data bits, MSB first); support independent or multiplexed readout |
| 19 (CS) | Chip select & sample trigger | Active-low signal that initiates sampling on falling edge and frames serial data transfer |
| 18 (SCLK) | Serial clock & conversion clock | Drives both data interface and internal SAR logic; conversion time = 16 SCLK cycles (e.g., 800 ns @ 20 MHz) |
| 20 (A0) | Multiplexer channel select | Chooses VA1/VB1 (low) or VA2/VB2 (high) for next simultaneous conversion pair |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous SAR conversion | Enables true time-aligned sampling of two sensor channels without inter-channel skew or software synchronization overhead |
| No pipeline delay | Guarantees deterministic latency: conversion completes in exactly 16 SCLK cycles after CS fall, simplifying real-time control loop timing |
| Flexible reference architecture | Supports three configurations: internal 2.5 V ref, external ref on VREF, or independent refs on DCAPA/DCAPB - enabling mixed-signal system partitioning |
| Low-power sleep modes | Reduces current to 1 µA (full shutdown) or 560 µA (static partial power-down), extending battery life in portable DAQ systems |
| Wide supply range (2.7–5.25 V) | Allows direct interfacing with 3.3 V or 5 V microcontrollers and sensors without level-shifting circuitry |
Applications
| Motor Phase Current Sensing | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: Real-time monitoring of two motor phase currents in servo drives or inverters using shunt resistors or current transformers. IC Role / Device Role / Timing Role: Dual-channel ADC performs synchronized sampling of IA and IB at 1 MSPS to capture fast transients and compute accurate torque/flux vectors. Use Value: Simultaneous conversion eliminates phase skew between channels, ensuring <100 ps inter-channel timing mismatch - critical for vector control accuracy. |
Use Scenario: High-density analog input card in programmable logic controllers handling multiple 4–20 mA or 0–10 V sensor inputs. IC Role / Device Role / Timing Role: Each AD7866ARUZ-REEL7 digitizes two sensor channels; multiple devices serve 8–16 channels per module with shared SPI bus. Use Value: On-chip 2.5 V reference and ±1.5 LSB INL enable <0.1% total unadjusted error (TUE) without external calibration components. |
| Medical Ultrasound Beamforming | Automotive Battery Cell Monitoring |
Use Scenario: Digitizing echo return signals from multiple transducer elements in portable ultrasound systems. IC Role / Device Role / Timing Role: Paired VA1/VB1 inputs acquire I/Q baseband signals from adjacent transducer channels with matched gain/offset. Use Value: Channel-to-channel gain match (±0.2 LSB) and offset match (±1.2 LSB) preserve beam coherence and reduce sidelobe artifacts. |
Use Scenario: Monitoring individual cell voltages in high-voltage EV battery packs using precision voltage dividers. IC Role / Device Role / Timing Role: Simultaneously samples two adjacent cell voltages (e.g., Cell N and N+1) to detect imbalance trends within 1 µs window. Use Value: 70 dB SNR at 300 kHz and 12 MHz full-power bandwidth support fast transient detection during load switching events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 12-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7865-1ARSZ | Single 12-bit, 1 MSPS ADC with 4-channel MUX; no simultaneous sampling; requires external reference | Lower channel count, sequential sampling only - unsuitable for time-critical dual-signal correlation | Choose when cost-per-channel is prioritized over timing alignment and internal reference is acceptable |
| ADS8325IPW | Single 16-bit, 100 kSPS SAR ADC; higher resolution but 10× slower throughput; SPI-only interface | Lacks dual-channel capability and simultaneous conversion; better for precision static measurements than dynamic acquisition | Prefer when resolution > speed is required and dual-channel sync is unnecessary |
Compared with AD7866ARUZ-REEL7, AD7865-1ARSZ offers lower integration and no simultaneous sampling, while ADS8325IPW trades throughput and dual-channel capability for higher resolution - making AD7866ARUZ-REEL7 uniquely suited for time-aligned, medium-resolution, high-speed dual-channel acquisition.
Availability
AD7866ARUZ-REEL7 is available at Aetrix Electronics and suitable for motor control systems, industrial PLC analog input modules, medical ultrasound beamforming subsystems, and automotive battery cell monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7866ARUZ-REEL7 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 AD7866 belongs to Analog Devices' precision high-speed data acquisition product line, designed specifically for applications demanding simultaneous multi-channel sampling, low power, and robust operation across –40°C to +125°C environments.
FAQ
What is the maximum sampling rate supported by the AD7866ARUZ-REEL7?
The AD7866ARUZ-REEL7 supports a maximum throughput rate of 1 MSPS per channel, achieved with a 20 MHz SCLK. Conversion time is fixed at 16 SCLK cycles (e.g., 800 ns at 20 MHz), and simultaneous sampling of both channels occurs on each CS falling edge. This rate is guaranteed across the full –40°C to +125°C operating range with VDD = 2.7 V to 5.25 V.
Does the AD7866ARUZ-REEL7 require an external reference voltage?
No, the AD7866ARUZ-REEL7 includes an on-chip 2.5 V reference with ±1% initial accuracy and 50 ppm/°C temperature coefficient. When REF SELECT is low, the internal reference powers both ADCs via DCAPA and DCAPB. External references can be applied to VREF, DCAPA, or DCAPB if higher precision or custom voltage levels are needed - but are not required for basic operation of AD7866ARUZ-REEL7.
How does the AD7866ARUZ-REEL7 handle simultaneous conversion of two channels?
The AD7866ARUZ-REEL7 contains two independent SAR ADC cores, each with its own track-and-hold amplifier and conversion logic. Upon the falling edge of CS, both ADCs sample their respective input pairs (VA1/VA2 and VB1/VB2) at the exact same instant. Conversion results appear simultaneously on DOUTA and DOUTB 16 SCLK cycles later - eliminating inter-channel skew and enabling true time-aligned acquisition essential for AD7866ARUZ-REEL7 applications.
What are the power consumption characteristics of the AD7866ARUZ-REEL7 at 1 MSPS?
At 1 MSPS and 3 V supply, AD7866ARUZ-REEL7 consumes a maximum of 3.8 mA (11.4 mW); at 5 V, it draws up to 4.8 mA (24 mW). In partial power-down mode at 100 kSPS, current drops to 560 µA. Full shutdown reduces current to 1 µA (–40°C to +85°C). These values include internal reference usage and are specified across temperature and supply voltage ranges per AD7866ARUZ-REEL7 datasheet Rev. A.
Can the AD7866ARUZ-REEL7 interface directly with a 3.3 V microcontroller SPI port?
Yes - the AD7866ARUZ-REEL7 supports logic-level compatibility via the VDRIVE pin, which sets digital I/O voltage thresholds. When VDRIVE = 3.3 V, input high is defined as ≥2.31 V and output high is ≥3.1 V, ensuring reliable communication with standard 3.3 V SPI peripherals. All digital pins (CS, SCLK, DOUTA, DOUTB, A0, RANGE, REF SELECT) are fully compatible without level shifters when VDRIVE matches the host controller's IO voltage.
AD7866ARUZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- 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:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7866ARUZ-REEL7 FAQ
1.How can I place an order for AD7866ARUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7866ARUZ-REEL7 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 AD7866ARUZ-REEL7 reliable?
The price and inventory of AD7866ARUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7866ARUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7866ARUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7866ARUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7866ARUZ-REEL7?
AD7866ARUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7866ARUZ-REEL7 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 AD7866ARUZ-REEL7?
For technical support, including AD7866ARUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7866ARUZ-REEL7 requirements.
6.How does Aetrix verify that AD7866ARUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7866ARUZ-REEL7 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 AD7866ARUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7866ARUZ-REEL7?
All AD7866ARUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7866ARUZ-REEL7, 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 AD7866ARUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7866ARUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7866ARUZ-REEL7 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…
