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Analog Devices Inc. AD7866BRUZ-REEL7
- Part No.:
- AD7866BRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7866BRUZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,945
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Product details
Overview
AD7866BRUZ-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 for real-time sensor or control loop sampling in industrial automation and motor control systems.
For engineers reviewing the AD7866BRUZ-REEL7 datasheet, AD7866BRUZ-REEL7 pinout, AD7866BRUZ-REEL7 application, or AD7866BRUZ-REEL7 equivalent, key selection criteria include simultaneous dual-channel sampling, 70 dB SNR at 300 kHz, ±1 LSB INL (B grade), 20-lead TSSOP package, and flexible 0 V–VREF / 0 V–2VREF input range selection via RANGE pin.
Technical Context
The AD7866BRUZ-REEL7 implements two independent SAR ADC cores, each with dedicated track-and-hold amplifiers supporting >10 MHz input bandwidth and aperture jitter of 50 ps typ. Conversion is initiated on the falling edge of CS, with timing fully synchronized to SCLK - no pipeline delay, no latency beyond 16 SCLK cycles (800 ns @ 20 MHz).
It supports three reference configurations: internal 2.5 V reference (REF SELECT = low), external reference on VREF (REF SELECT = high), or separate external references per ADC on DCAPA/DCAPB (REF SELECT = low + VREF = AGND). Output coding (straight binary or twos complement) and input range are dynamically selected by the RANGE pin state sampled at CS fall.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 part-in-4096 quantization granularity for precision analog measurement. |
| Throughput Rate | 1 MSPS - enables real-time sampling of signals up to ~300 kHz (Nyquist-limited) with full 12-bit accuracy. |
| SNR | 70 dB at 300 kHz - ensures clean digitization of medium-frequency sensor outputs (e.g., current shunt, vibration transducers). |
| INL (B Grade) | ±1 LSB max (0 V to VREF range) - guarantees monotonicity and ≤0.024% full-scale linearity error for closed-loop feedback. |
| Power @ 3 V / 1 MSPS | 11.4 mW max - enables battery-powered or thermally constrained designs without sacrificing speed. |
| Channel Isolation | –88 dB typ - prevents crosstalk between simultaneously sampled channels (e.g., phase A/B current sensing). |
| Reference | On-chip 2.5 V ±1% - eliminates need for external reference IC unless higher stability or external sourcing is required. |
Pinout & Package
AD7866BRUZ-REEL7 is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm × 6.5 mm, 0.65 mm pitch, RoHS-compliant and moisture-sensitive level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF SELECT) | Reference mode control input | Selects internal 2.5 V ref (low) or external ref on VREF (high); enables per-ADC external refs when VREF = AGND. |
| 2, 9 (DCAPB, DCAPA) | Per-ADC reference decoupling & external ref input | Connect 10 µF + 0.1 µF caps for internal ref stability; accept individual external references for ADC B/A respectively. |
| 4–7 (VB2, VB1, VA2, VA1) | Analog inputs (2 per ADC) | Four single-ended channels: VA1/VA2 for ADC A, VB1/VB2 for ADC B; multiplexed via A0 pin. |
| 11 (RANGE) | Input range & output coding select | Sampled at CS fall: low → 0–VREF + straight binary; high → –VREF to +VREF + twos complement. |
| 15–16 (DOUTA, DOUTB) | Independent serial data outputs | Simultaneous 16-bit frames (1 zero + 3 status + 12 data bits, MSB-first) - enables true parallel readout without multiplexing. |
| 19 (CS) | Chip select & conversion trigger | Active-low signal that initiates sampling on falling edge and frames serial data transfer - no separate CONVST required. |
| 20 (A0) | Multiplexer channel select | Selects VA1/VB1 (low) or VA2/VB2 (high) for simultaneous conversion - supports dual-signal acquisition per cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous dual-channel conversion | Two independent 12-bit SAR ADCs sample and convert VA1/VA2 and VB1/VB2 concurrently - eliminates inter-channel timing skew in differential or multi-axis measurements. |
| No pipeline delay | Fixed 16-SCLK conversion time (800 ns @ 20 MHz) with deterministic latency - essential for time-critical control loops requiring precise sample-to-result timing. |
| Flexible power/throughput scaling | Power scales linearly with SCLK frequency; partial power-down mode draws only 560 µA static - enables dynamic rate adaptation in energy-aware systems. |
| High channel-to-channel isolation | –88 dB typical crosstalk - maintains signal integrity when measuring high-gain, high-impedance sources (e.g., isolated current sensors) on adjacent channels. |
| Wide supply range | Operates from 2.7 V to 5.25 V AVDD/DVDD/VDRIVE - supports direct interfacing with 3.3 V or 5 V microcontrollers and mixed-voltage system architectures. |
Applications
| Motor Phase Current Sensing | Industrial PLC Analog Input Module |
|---|---|
|
Use Scenario: Real-time sampling of two motor phase currents (e.g., Ia, Ib) for field-oriented control (FOC) in inverters. IC Role / Device Role / Timing Role: Dual simultaneous sampling ADC providing time-aligned 12-bit digital representations of both currents at 1 MSPS. Use Value: Eliminates phase skew between current samples, enabling accurate torque calculation and stable FOC execution without software interpolation. |
Use Scenario: High-density analog input card in programmable logic controllers handling multiple 4–20 mA or ±10 V sensor inputs. IC Role / Device Role / Timing Role: Dual ADC front-end converting two sensor channels per device with configurable input ranges and on-board reference. Use Value: Reduces component count vs. single-channel solutions; 20-lead TSSOP enables compact layout while maintaining 70 dB SNR for industrial noise immunity. |
| Multi-Axis Vibration Monitoring | Isolated Power Supply Feedback |
|
Use Scenario: Simultaneous acquisition of acceleration signals from orthogonal axes (X/Y) on rotating machinery using piezoelectric sensors. IC Role / Device Role / Timing Role: Dual SAR ADC capturing time-coherent X/Y vibration waveforms with 12-bit resolution and 1 MSPS throughput. Use Value: Enables accurate FFT-based spectral analysis and bearing fault detection due to matched gain/offset and –88 dB channel isolation. |
Use Scenario: Digitizing isolated voltage and current feedback signals in digitally controlled AC/DC or DC/DC power supplies. IC Role / Device Role / Timing Role: Dual ADC acquiring primary-side VOUT and secondary-side IOUT with independent reference options for optimal SNR in each domain. Use Value: Supports fast transient response and adaptive regulation by delivering synchronized, high-fidelity feedback data to the digital controller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7865-1ARSZ | Single 14-bit, 1 MSPS ADC with 4-channel mux; no simultaneous sampling; requires external reference. | Lacks dual independent ADCs - unsuitable for time-aligned dual-signal capture; better for higher-resolution single-channel scanning. | Choose AD7865-1ARSZ only if 14-bit resolution outweighs need for simultaneity and on-chip reference. |
| ADS8325IPW | Single 16-bit, 100 kSPS SAR ADC; serial interface; external reference only; no dual-channel capability. | Lower throughput (100 kSPS vs. 1 MSPS) and no second channel - cannot replace AD7866BRUZ-REEL7 in real-time dual-sampling roles. | Consider ADS8325IPW only for ultra-high-precision, low-speed single-channel applications where speed and channel count are secondary. |
Compared with AD7865-1ARSZ and ADS8325IPW, the AD7866BRUZ-REEL7 uniquely delivers simultaneous dual 12-bit conversion at 1 MSPS with integrated reference - making it irreplaceable in time-critical, multi-signal acquisition systems where channel alignment and self-contained operation are mandatory.
Availability
AD7866BRUZ-REEL7 is available at Aetrix Electronics and suitable for industrial automation, motor control, and power supply monitoring applications requiring stable component supply, long-term production continuity, and guaranteed RoHS-compliant sourcing.
Supply support for AD7866BRUZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and healthcare markets.
The AD7866 belongs to Analog Devices' precision SAR ADC product line, designed specifically for high-speed, low-power, multi-channel data acquisition in space-constrained and thermally sensitive industrial systems.
FAQ
What is the maximum sampling rate of the AD7866BRUZ-REEL7?
The AD7866BRUZ-REEL7 achieves a maximum throughput rate of 1 MSPS (1 million samples per second) when operated with a 20 MHz SCLK. This rate is sustained across its full operating temperature range (–40°C to +125°C) and supply range (2.7 V to 5.25 V), with conversion completed in exactly 16 SCLK cycles regardless of input signal.
Does the AD7866BRUZ-REEL7 support simultaneous sampling of two independent analog signals?
Yes, the AD7866BRUZ-REEL7 integrates two fully independent SAR ADCs with dedicated track-and-hold amplifiers, enabling true simultaneous sampling and conversion of two analog inputs (e.g., VA1/VA2 and VB1/VB2). The conversion results appear concurrently on DOUTA and DOUTB, eliminating inter-channel timing skew critical for vector control and differential measurements.
Can the AD7866BRUZ-REEL7 operate with an external reference instead of the internal 2.5 V reference?
Yes, the AD7866BRUZ-REEL7 supports three reference modes: (1) internal 2.5 V reference (REF SELECT = low), (2) single external reference applied to VREF (REF SELECT = high), or (3) separate external references per ADC applied to DCAPA and DCAPB (REF SELECT = low + VREF = AGND). All modes maintain full 12-bit performance and specified SNR/INL.
What is the significance of the RANGE pin on the AD7866BRUZ-REEL7?
The RANGE pin on the AD7866BRUZ-REEL7 determines both the analog input voltage range and output coding format. Sampled at the falling edge of CS: low selects 0 V to VREF input range with straight binary output; high selects –VREF to +VREF (2×VREF span) with twos complement output - enabling bipolar signal digitization without external level-shifting circuitry.
How does the AD7866BRUZ-REEL7 manage power consumption at varying throughput rates?
The AD7866BRUZ-REEL7 offers three power states: normal (4.8 mA @ 5 V / 1 MSPS), partial power-down (560 µA static), and full power-down (1 µA). Since conversion time is directly tied to SCLK frequency, reducing SCLK lowers throughput and power proportionally - allowing dynamic optimization for battery life or thermal budget without firmware changes.
AD7866BRUZ-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:
- -
AD7866BRUZ-REEL7 FAQ
1.How can I place an order for AD7866BRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7866BRUZ-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 AD7866BRUZ-REEL7 reliable?
The price and inventory of AD7866BRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7866BRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7866BRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7866BRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7866BRUZ-REEL7?
AD7866BRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7866BRUZ-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 AD7866BRUZ-REEL7?
For technical support, including AD7866BRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7866BRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7866BRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7866BRUZ-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 AD7866BRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7866BRUZ-REEL7?
All AD7866BRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7866BRUZ-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 AD7866BRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7866BRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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