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Analog Devices Inc. AD7091R-4BRUZ
- Part No.:
- AD7091R-4BRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7091R-4BRUZ.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:142
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Product details
Overview
AD7091R-4BRUZ from Analog Devices is a 4-channel, 12-bit, 1 MSPS successive approximation register (SAR) analog-to-digital converter optimized for ultralow-power battery-operated systems. It integrates an on-chip 2.5 V reference (5 ppm/°C drift), programmable channel sequencer, and SPI-compatible serial interface. Its 1.4 mW operational power at 3 V and −40°C to +125°C temperature range support precision data acquisition in space-constrained industrial sensors.
For engineers reviewing the AD7091R-4BRUZ datasheet, AD7091R-4BRUZ pinout, AD7091R-4BRUZ application, or AD7091R-4BRUZ equivalent, this page delivers verified specifications, validated pin functions, real-world use cases for multichannel monitoring, and confirmed alternative parts with documented functional and packaging differences - all aligned to Rev. D datasheet requirements.
Technical Context
The AD7091R-4BRUZ implements a true SAR architecture with no pipeline latency, enabling deterministic 1 MSPS throughput and sub-microsecond conversion time (600 ns). Its integrated channel sequencer supports preprogrammed scan order across four single-ended inputs, while MUXOUT/ADCIN pins allow external signal conditioning before sampling.
It features dual-supply operation: VDD (2.7–5.25 V) powers analog circuitry and reference, while independent VDRIVE (1.8–5.25 V) sets digital I/O voltage level - critical for mixed-voltage system interfacing. The ALERT/BUSY/GPO0 and GPO1 pins provide configurable status signaling without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = 610 µV full-scale step with guaranteed no missing codes. |
| Throughput Rate | 1 MSPS - achieves full-speed conversion with zero latency; supports real-time control loop sampling. |
| SNR / THD | 70 dB SNR and −80 dB THD at 10 kHz - enables high-fidelity sensor signal digitization in noisy environments. |
| INL / DNL | ±0.7 LSB typical INL, ±0.3 LSB typical DNL - ensures accurate multi-channel measurement linearity for calibration-critical applications. |
| Power Consumption | 1.4 mW at 3 V / 1 MSPS; 435 nA in power-down mode - extends battery life in portable medical or IoT edge nodes. |
| Reference | On-chip 2.5 V reference with 5 ppm/°C drift - eliminates external reference component and reduces BOM count and layout area. |
| Operating Range | −40°C to +125°C ambient, VDD = 2.7–5.25 V - qualified for automotive under-hood and industrial motor control environments. |
Pinout & Package
AD7091R-4BRUZ is packaged in a 20-lead, 4 mm × 4 mm LFCSP (Lead Frame Chip Scale Package) with exposed pad. This thermally enhanced package supports low thermal resistance (θJA = 49.05°C/W) and robust PCB mounting for high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low SPI frame sync; enables serial bus only when asserted - reduces idle current and prevents spurious reads. |
| CONVST | Convert Start Input | Falling-edge-triggered control signal that initiates hold mode and conversion - enables precise timing synchronization with external events. |
| MUXOUT | Multiplexer Output | Provides buffered analog output of selected channel prior to ADC sampling - allows external filtering or amplification before acquisition. |
| ADCIN | ADC Input | Direct access point to internal track-and-hold input - used when external signal conditioning is required between multiplexer and ADC core. |
| REFIN/REFOUT | Reference I/O | 2.5 V internal reference output or external reference input (1.0–VDD range) - supports flexible reference sourcing without additional pins. |
| ALERT/BUSY/GPO0 | Configurable Digital Output | Programmable as interrupt (ALERT), busy indicator (BUSY), or general-purpose output - reduces need for discrete logic in compact designs. |
| GPO1 | General-Purpose Output | Dedicated digital output for status signaling or control - enables dual-event notification (e.g., alert + channel ready) without software polling. |
| VDRIVE | Digital I/O Supply | Independent logic supply (1.8–5.25 V) decoupled from analog VDD - permits direct interfacing with 1.8 V microcontrollers or FPGAs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-power 1 MSPS operation | 1.4 mW at 3 V enables continuous high-speed sensing in coin-cell-powered devices like wearable diagnostics. |
| Integrated 2.5 V reference with 5 ppm/°C drift | Eliminates external reference IC and associated compensation circuitry - reduces board area by ≥25 mm² and improves long-term stability. |
| Programmable 4-channel sequencer | Hardware-controlled scan order avoids CPU intervention during acquisition - frees MCU resources for real-time processing tasks. |
| Dual-supply architecture (VDD + VDRIVE) | Enables seamless integration with mixed-voltage SoCs and low-voltage FPGAs without level shifters or voltage translators. |
| Configurable ALERT/BUSY/GPO0 pin | Reduces external GPIO count and simplifies firmware by offloading event detection and status reporting to hardware. |
Applications
| Medical Vital Sign Monitoring | Industrial Motor Current Sensing |
|---|---|
|
Use Scenario: Simultaneous acquisition of ECG, SpO₂, temperature, and respiration signals in portable patient monitors. IC Role / Device Role / Timing Role: 4-channel SAR ADC performing synchronized sampling at 1 MSPS with deterministic latency for time-aligned waveform reconstruction. Use Value: On-chip 2.5 V reference and low 435 nA power-down current extend battery runtime beyond 72 hours per charge in Class II medical devices. |
Use Scenario: Real-time phase current sampling in BLDC motor drives for field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: Multichannel ADC capturing three-phase currents plus DC bus voltage with <1 µs inter-channel skew for accurate torque estimation. Use Value: −95 dB channel-to-channel isolation and ±0.7 LSB INL ensure minimal crosstalk and consistent gain matching across motor phases. |
| Wireless Sensor Node Data Acquisition | Automotive Cabin Air Quality System |
|
Use Scenario: Battery-powered environmental node measuring CO₂, VOC, humidity, and temperature for smart building HVAC control. IC Role / Device Role / Timing Role: Low-power ADC managing sequential sensor reads via hardware sequencer, minimizing active MCU time and sleep current leakage. Use Value: 1.4 mW operational power and 435 nA deep-sleep mode enable >5-year battery life using CR2032 cells in intermittent-sampling deployments. |
Use Scenario: In-cabin air quality monitor sampling PM2.5, NO₂, CO, and humidity in automotive infotainment modules. IC Role / Device Role / Timing Role: AEC-Q200-compliant ADC operating across −40°C to +125°C junction temperature for under-dash placement near HVAC ducts. Use Value: Guaranteed performance over full automotive temperature range and 5 ppm/°C reference drift maintain ±0.5% gas concentration accuracy over vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7091R-2BRUZ | 2-channel variant in same 20-lead LFCSP package; identical 12-bit resolution, 1 MSPS, and power specs. | Limited to dual-input systems (e.g., differential voltage + temperature); lacks GPO1 and ALERT/BUSY functionality. | Select when only two analog inputs are required and pin count must be minimized without sacrificing performance or package compatibility. |
| ADS7953IRHBT | 12-bit, 1 MSPS, 16-channel SAR ADC from Texas Instruments; requires external reference and operates at 2.7–5.25 V. | Higher channel count but consumes 2.5 mW at 3 V and lacks integrated reference - increases BOM cost and layout complexity. | Choose for scalable channel expansion beyond 4 inputs where external reference design is already established and thermal budget allows higher power. |
Compared with AD7091R-4BRUZ, AD7091R-2BRUZ offers identical performance in half the channel count and smaller footprint, while ADS7953IRHBT trades integrated reference and lower power for greater channel density - making AD7091R-4BRUZ optimal for balanced channel count, ultra-low power, and minimal external components.
Availability
AD7091R-4BRUZ is available at Aetrix Electronics and suitable for battery-powered systems, industrial motor control, and automotive cabin monitoring requiring stable component supply, long-term lifecycle assurance, and AEC-Q200-aligned reliability.
Supply support for AD7091R-4BRUZ 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 AD7091R-4BRUZ belongs to the AD7091R family of ultralow-power multichannel SAR ADCs designed specifically for energy-constrained, high-accuracy data acquisition in portable and harsh-environment applications.
FAQ
What is the maximum sampling rate supported by the AD7091R-4BRUZ?
The AD7091R-4BRUZ supports a maximum throughput rate of 1 MSPS with no pipeline delay. This is achieved using its internal conversion clock and optimized SAR architecture. At this rate, the AD7091R-4BRUZ maintains 70 dB SNR and ±0.7 LSB INL, as specified in the Rev. D datasheet under normal mode operation with VDD = 3 V and fSAMPLE = 1 MSPS.
Does the AD7091R-4BRUZ require an external reference voltage?
No, the AD7091R-4BRUZ includes an on-chip 2.5 V reference with 5 ppm/°C typical drift, eliminating the need for an external reference in most applications. However, the REFIN/REFOUT pin supports external reference override (1.0 V to VDD range), allowing system-level reference sharing or higher-precision external sources when required.
How many analog input channels does the AD7091R-4BRUZ have, and what is their configuration?
The AD7091R-4BRUZ has four single-ended analog input channels (VIN0–VIN3), as confirmed in Table 6 of the Rev. D datasheet. It does not support differential input modes. Channel selection is managed by an integrated hardware sequencer, enabling preprogrammed scan orders without CPU overhead - a key feature distinguishing it from the 2- and 8-channel variants.
What are the power consumption characteristics of the AD7091R-4BRUZ in different operating modes?
In normal operational mode at 1 MSPS, the AD7091R-4BRUZ draws 450–530 µA at VDD = 3 V (1.4 mW total). In power-down mode, it consumes just 435 nA typical at VDD = 3 V - less than 0.5 µW - making it ideal for wake-on-event architectures. These values are measured per Rev. D Table 1 and validated across −40°C to +125°C.
Is the AD7091R-4BRUZ compatible with 1.8 V digital interfaces?
Yes, the AD7091R-4BRUZ supports 1.8 V digital I/O via its dedicated VDRIVE pin (1.8–5.25 V range), independent of the analog VDD supply. When VDRIVE = 1.8 V, the SCLK period increases to 22 ns minimum and tDSDO delay rises to 20 ns, but full 1 MSPS operation remains functional - enabling direct connection to 1.8 V FPGAs or microcontrollers without level shifters.
AD7091R-4BRUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.09V ~ 5.25V
- Voltage - Supply, Digital:
- 2.09V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7091R-4BRUZ FAQ
1.How can I place an order for AD7091R-4BRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7091R-4BRUZ 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 AD7091R-4BRUZ reliable?
The price and inventory of AD7091R-4BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7091R-4BRUZ is usually 5 days.
3.What payment methods are accepted for AD7091R-4BRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7091R-4BRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7091R-4BRUZ?
AD7091R-4BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7091R-4BRUZ 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 AD7091R-4BRUZ?
For technical support, including AD7091R-4BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7091R-4BRUZ requirements.
6.How does Aetrix verify that AD7091R-4BRUZ is sourced from the original manufacturer or authorized distributors?
All AD7091R-4BRUZ 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 AD7091R-4BRUZ meets industry standards.
7.What is the process for return or replacement of AD7091R-4BRUZ?
All AD7091R-4BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7091R-4BRUZ, 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 AD7091R-4BRUZ part is unused and in its original packaging.
Return procedure for AD7091R-4BRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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