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Analog Devices Inc. AD7091R-5BRUZ
- Part No.:
- AD7091R-5BRUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7091R-5BRUZ.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:108
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Product details
Overview
AD7091R-5BRUZ from Analog Devices is a 12-bit, 4-channel, ultra-low-power successive approximation ADC with I²C interface, 2.5 V on-chip reference (5 ppm/°C drift), 68 dB SNR at 1 kHz, and operation from 2.7 V to 5.25 V supply. It delivers 22.2 kSPS throughput in command mode and supports autocycle, sample, and command conversion modes for battery-powered sensor monitoring.
For engineers reviewing the AD7091R-5BRUZ datasheet, AD7091R-5BRUZ pinout, AD7091R-5BRUZ application, or AD7091R-5BRUZ equivalent, key selection criteria include its 90 µW typical power at 3 V, four single-ended analog inputs with channel sequencer, ALERT/BUSY multifunction pin, and dual-supply flexibility (VDD up to 5.25 V, VDRIVE from 1.8 V).
Technical Context
The AD7091R-5BRUZ integrates a wide-bandwidth track-and-hold amplifier (1.5 MHz full-power bandwidth) and on-chip oscillator, eliminating external clock requirements. Its I²C-compatible 2-wire interface operates at 100 kHz (standard) or 400 kHz (fast) modes, with configurable slave address via AS0/AS1 pins.
Conversion control is implemented through three distinct modes: edge-triggered sample mode (CONVST/GPO1), software-initiated command mode (I²C write), and preprogrammed autocycle mode with four selectable update rates (90–880 µs per conversion). The device features a 12-bit straight-binary output coding scheme and no pipeline delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for precise analog signal digitization. |
| SNR | 68 dB typical at 1 kHz input - enables accurate low-noise measurement of small-signal sensors. |
| INL | ±0.8 LSB max - ensures monotonicity and linearity critical for closed-loop control feedback. |
| Throughput Rate | 22.2 kSPS in command mode - supports real-time sampling of fast-changing industrial signals. |
| Power Consumption | 90 µW typical at 3 V, fast mode - extends battery life in portable medical or IoT endpoints. |
| Reference | On-chip 2.5 V ±10 mV, 5 ppm/°C drift - eliminates external reference component and reduces BOM cost. |
| Input Channels | 4 single-ended - allows simultaneous monitoring of multiple voltage sources without external multiplexer. |
Pinout & Package
AD7091R-5BRUZ is available in a 20-lead LFCSP (3 mm × 3 mm, 0.5 mm pitch) and TSSOP package. Both packages feature an exposed thermal pad (EPAD) recommended to be soldered to GND for optimal thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0–VIN3 | Analog input channels 0–3 | Single-ended inputs referenced to GND; each accepts 0 V to VREF range (up to 2.5 V). |
| REFIN/REFOUT | Reference input/output | Supplies or sinks reference voltage; internal 2.5 V source or external 1.0 V–VDD reference. |
| ALERT/BUSY/GPO0 | Configurable multifunction pin | Indicates out-of-limit condition (ALERT), active conversion (BUSY), or user-defined logic level (GPO0). |
| CONVST/GPO1 | Convert start / general-purpose output | Falling-edge triggered conversion initiation or software-controlled digital output in command/autocycle modes. |
| SCL/SDA | I²C clock/data lines | Open-drain, pull-up required; support standard (100 kHz) and fast (400 kHz) I²C timing. |
| VDD / VDRIVE | Analog/digital supply rails | VDD powers core ADC (2.7–5.25 V); VDRIVE sets logic interface voltage (1.8–5.25 V, ≤ VDD + 0.3 V). |
Key Features
| Feature | Design Value |
|---|---|
| Autocycle mode with 4 update rates | Enables autonomous multi-channel scanning at 90–880 µs intervals without host intervention. |
| Programmable ALERT threshold | Allows hardware-level over/under-range detection on any channel, reducing MCU polling overhead. |
| No pipeline delay | Delivers first valid conversion result immediately after start-critical for time-deterministic systems. |
| Channel-to-channel isolation | −105 dB at 1 kHz prevents crosstalk between simultaneously monitored analog signals. |
| Power-down current | 550 nA typical at 5.25 V - preserves battery charge during extended idle periods. |
Applications
| Medical Vital Sign Monitoring | Industrial Sensor Node |
|---|---|
Use Scenario: Continuous acquisition of ECG, temperature, and SpO₂ sensor outputs in handheld diagnostic devices. IC Role / Device Role / Timing Role: 4-channel ADC digitizes analog front-end signals with synchronized sampling and low-latency ALERT for arrhythmia detection. Use Value: Ultra-low 90 µW power enables >7-day battery life; on-chip 2.5 V reference eliminates calibration drift across temperature. | Use Scenario: Remote monitoring of pressure, humidity, and vibration in predictive maintenance gateways. IC Role / Device Role / Timing Role: ADC interfaces with multiple transducers via VIN0–VIN3, using autocycle mode to scan all channels every 200 µs. Use Value: −105 dB channel isolation prevents cross-coupling between high-gain piezoelectric and resistive sensors. |
| Portable Gas Detector | Smart Energy Metering |
Use Scenario: Battery-powered CO/H₂S detector requiring long-term stability and low false-alarm rate. IC Role / Device Role / Timing Role: Digitizes electrochemical sensor output and triggers ALERT when gas concentration exceeds programmable thresholds. Use Value: ±0.8 LSB INL and 5 ppm/°C reference drift ensure <0.1% full-scale error over −40°C to +125°C operating range. | Use Scenario: Sub-metering module measuring voltage, current, and neutral leakage in residential smart meters. IC Role / Device Role / Timing Role: Simultaneous sampling of isolated analog inputs using MUXOUT/ADCIN pins for external anti-alias filtering. Use Value: 1.5 MHz full-power bandwidth supports accurate harmonic analysis up to 50th order (2.5 kHz @ 50 Hz fundamental). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel, low-power ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 16-channel, SPI interface, 1.25 mW typical power at 3 V - 14× higher than AD7091R-5BRUZ. | Requires SPI host controller; lacks integrated reference and ALERT function. | Select when higher channel count and faster 1 MSPS throughput outweigh power and integration trade-offs. |
| MCP3204-I/P | 12-bit, 4-channel, SPI interface, no on-chip reference, 350 µA IDD at 5 V - ~15× higher current than AD7091R-5BRUZ at 3 V. | Needs external reference and level-shifting for mixed-voltage systems; no autocycle or ALERT capability. | Choose for legacy SPI-based designs where I²C compatibility and ultra-low power are not mandatory. |
Compared with ADS7953IRHBT and MCP3204-I/P, AD7091R-5BRUZ provides the lowest system-level power consumption, highest integration (reference + ALERT + I²C), and widest temperature range (−40°C to +125°C), making it optimal for space-constrained, battery-operated endpoints requiring minimal external components.
Availability
AD7091R-5BRUZ is available at Aetrix Electronics and suitable for battery-powered systems, medical instruments, and industrial sensor nodes requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for AD7091R-5BRUZ 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.
The AD7091R-5BRUZ belongs to Analog Devices' ultra-low-power precision ADC product line, designed specifically for energy-constrained, multi-sensor data acquisition in portable and remote monitoring applications.
FAQ
What is the maximum sampling rate of the AD7091R-5BRUZ in command mode?
The AD7091R-5BRUZ achieves a maximum throughput rate of 22.2 kSPS in command mode when operating with an I²C clock frequency of 400 kHz. This rate is determined by the combined time for I²C transaction overhead and the fixed 550 ns conversion time. The device does not support oversampling or decimation modes that would alter this base rate.
Does the AD7091R-5BRUZ require an external reference voltage?
No, the AD7091R-5BRUZ includes an accurate 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 voltages from 1.0 V to VDD if higher precision or different reference levels are required. When using the internal reference, a 2.2 µF capacitor must be placed on the REFIN/REFOUT pin.
How does the ALERT function operate on the AD7091R-5BRUZ?
The ALERT function on the AD7091R-5BRUZ is a configurable digital output (ALERT/BUSY/GPO0 pin) that asserts low when any enabled channel's conversion result falls outside user-programmed high/low limit registers. It remains asserted until cleared via I²C register access or power cycle. This hardware interrupt reduces host processor polling and enables immediate response to out-of-bounds conditions without firmware latency.
Can the AD7091R-5BRUZ operate with different supply voltages for analog and digital sections?
Yes, the AD7091R-5BRUZ supports independent supply rails: VDD (2.7 V to 5.25 V) powers the analog core and ADC, while VDRIVE (1.8 V to 5.25 V) sets the logic interface voltage for SCL/SDA/AS0/AS1 pins. VDRIVE must not exceed VDD by more than 0.3 V. This dual-supply architecture enables seamless interfacing with 1.8 V microcontrollers while maintaining full analog performance at higher VDD.
What package options are available for the AD7091R-5BRUZ?
The AD7091R-5BRUZ is offered in two RoHS-compliant packages: a 20-lead LFCSP (3 mm × 3 mm, 0.5 mm pitch, exposed pad) and a 20-lead TSSOP (6.5 mm × 4.4 mm). Both packages share identical pinout and functionality. The LFCSP provides superior thermal performance (θJA = 52°C/W) and smaller footprint, while the TSSOP offers easier manual assembly and test accessibility.
AD7091R-5BRUZ 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):
- 22.22k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7091R-5BRUZ FAQ
1.How can I place an order for AD7091R-5BRUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7091R-5BRUZ 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-5BRUZ reliable?
The price and inventory of AD7091R-5BRUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7091R-5BRUZ is usually 5 days.
3.What payment methods are accepted for AD7091R-5BRUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7091R-5BRUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7091R-5BRUZ?
AD7091R-5BRUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7091R-5BRUZ 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-5BRUZ?
For technical support, including AD7091R-5BRUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7091R-5BRUZ requirements.
6.How does Aetrix verify that AD7091R-5BRUZ is sourced from the original manufacturer or authorized distributors?
All AD7091R-5BRUZ 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-5BRUZ meets industry standards.
7.What is the process for return or replacement of AD7091R-5BRUZ?
All AD7091R-5BRUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7091R-5BRUZ, 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-5BRUZ part is unused and in its original packaging.
Return procedure for AD7091R-5BRUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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