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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc. AD7091R-2BCPZ-RL7

Name: AD7091R-2BCPZ-RL7
Brand: Analog Devices Inc.
SKU: AD7091R-2BCPZ-RL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD7091R-2BCPZ-RL7

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 16-WQFN Exposed Pad, CSP

Datasheet:: AD7091R-2BCPZ-RL7.pdf

Description:: IC ADC 12BIT SAR 16LFCSP

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Product details

Overview

AD7091R-2BCPZ-RL7 from Analog Devices is a 2-channel, 12-bit, 1 MSPS successive approximation register (SAR) analog-to-digital converter optimized for ultralow-power battery-operated systems. It operates from a single 2.7 V to 5.25 V supply, delivers 70 dB SNR at 10 kHz input, features ±0.7 LSB typical INL, and integrates a 2.5 V reference with 5 ppm/°C drift - enabling precision sensor digitization in space-constrained industrial monitoring nodes.

For engineers reviewing the AD7091R-2BCPZ-RL7 datasheet, AD7091R-2BCPZ-RL7 pinout, AD7091R-2BCPZ-RL7 application, or AD7091R-2BCPZ-RL7 equivalent, key selection considerations include its dual-channel single-ended architecture, 1.4 mW operational power at 1 MSPS, SPI-compatible serial interface with CONVST-triggered conversion, and 16-lead 4 mm × 4 mm LFCSP package with exposed pad.

Technical Context

The AD7091R-2BCPZ-RL7 implements a true SAR architecture with no pipeline latency, achieving full 12-bit accuracy in 600 ns conversion time and 400 ns acquisition time. Its on-chip channel sequencer is disabled (fixed 2-channel mode), and it lacks ALERT/BUSY/GPOx pins - distinguishing it from the 4-/8-channel variants.

It uses an internal 2.5 V reference (±0.01 V tolerance, 5 ppm/°C drift) with REFIN/REFOUT pin supporting external overdrive from 1.0 V to VDD. The MUXOUT/ADCIN signal path enables single op-amp buffering between multiplexer output and ADC input, reducing component count in multi-sensor front ends.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	12-bit SAR - delivers 1 LSB = 610 µV step size with 2.5 V reference, sufficient for ±0.025% full-scale measurement accuracy.
Throughput Rate	1 MSPS - supports real-time sampling of signals up to 500 kHz Nyquist bandwidth without aliasing in high-speed diagnostics.
SNR @ 10 kHz	70 dB typical - enables detection of 1 mV signals buried in noise floor of ~0.1 mVrms in medical or instrumentation applications.
INL	±0.7 LSB typical - ensures monotonicity and <0.017% full-scale linearity error, critical for closed-loop control feedback paths.
Power @ 1 MSPS	1.4 mW at VDD = 3 V - allows continuous 1 MSPS operation for >1 week on a 200 mAh coin cell, ideal for portable data loggers.
Reference	On-chip 2.5 V ±0.01 V, 5 ppm/°C - eliminates external reference IC, reduces BOM cost, and maintains ±0.06% voltage stability across −40°C to +125°C.
Operating Range	−40°C to +125°C, VDD = 2.7 V to 5.25 V - qualified for under-hood automotive sensors and industrial PLC I/O modules.

Pinout & Package

AD7091R-2BCPZ-RL7 is housed in a 16-lead, 4 mm × 4 mm LFCSP package with exposed pad (EPAD), optimized for thermal performance and PCB area efficiency in compact sensor nodes.

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select Input	Active-low SPI frame sync; must be held low during SDO data readout to avoid bus contention.
RESET	Asynchronous Reset	Pulse ≥10 ns resets internal registers and configuration; required after power-up before first conversion.
VDD	Analog Power Supply	2.7–5.25 V supply for core ADC and reference; requires local 100 nF + 1 µF decoupling to GND.
REGCAP	Internal Regulator Output	Decoupled with 1.0 µF capacitor to stabilize internal LDO powering analog circuitry.
REFIN/REFOUT	Reference I/O	Provides 2.5 V reference output or accepts 1.0–VDD external reference; 2.2 µF decoupling mandatory for stability.
GND	Analog Ground	Primary return path for analog signals; must be connected to system ground plane under EPAD.
MUXOUT	Multiplexer Output	Direct output of 2:1 analog mux; tied to ADCIN when no external filtering needed.
VIN0, VIN1	Analog Inputs	Single-ended inputs, 0–VREF range; support rail-to-rail input with ≤10 pF acquisition-phase capacitance.
ADCIN	Track-and-Hold Input	Access point to internal sampling capacitor; connects to MUXOUT or external buffer output.
SDI	Serial Data Input	Configures registers (e.g., channel selection, power mode); MSB-first, clocked on SCLK rising edge.
SDO	Serial Data Output	13-bit conversion result (12-bit + sign bit); clocked out on SCLK falling edge.
SCLK	Serial Clock	Up to 50 MHz; timing-critical for 1 MSPS throughput - tDSDO delay varies with VDRIVE level.
CONVST	Conversion Start	Falling-edge triggered; initiates sample-to-hold transition and conversion sequence.
VDRIVE	Digital I/O Supply	1.8–5.25 V logic interface supply; independent of VDD, enabling mixed-voltage system interfacing.
EPAD	Exposed Thermal Pad	Not internally connected; soldered to GND for thermal dissipation and EMI reduction.

Key Features

Feature	Design Value
Ultralow operational power	1.4 mW at 3 V / 1 MSPS - enables always-on sensing in energy-harvesting IoT nodes without compromising update rate.
No-latency SAR architecture	600 ns conversion + 400 ns acquisition - delivers deterministic timing for time-critical control loops with zero pipeline delay.
Integrated 2.5 V reference	5 ppm/°C drift, ±0.01 V initial accuracy - removes need for external reference IC and associated layout area and cost.
MUXOUT/ADCIN signal path	Allows single op-amp conditioning between mux and ADC - cuts component count by 50% vs. discrete buffer per channel.
Wide temperature qualification	−40°C to +125°C operation - supports deployment in automotive engine compartments and industrial motor drives.

Applications

Portable Medical Sensors	Industrial Process Monitoring
Use Scenario: Continuous vital sign acquisition (ECG, SpO₂) in handheld patient monitors powered by rechargeable Li-ion cells. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing differential analog front-end outputs with precise timing alignment via shared CONVST. Use Value: 1.4 mW power at 1 MSPS extends battery life beyond 8 hours while maintaining diagnostic-grade 70 dB SNR and ±0.7 LSB INL.	Use Scenario: Multi-point temperature and pressure sensing in factory-floor PLC analog input modules. IC Role / Device Role / Timing Role: 2-channel SAR ADC acquiring isolated sensor signals with integrated 2.5 V reference eliminating calibration drift over temperature. Use Value: −40°C to +125°C rating and 5 ppm/°C reference drift ensure stable 12-bit accuracy across harsh industrial environments without recalibration.
Wireless Sensor Nodes	Automotive Cabin Sensors
Use Scenario: Battery-powered environmental sensor clusters (CO₂, humidity, VOC) transmitting data via BLE or LoRaWAN. IC Role / Device Role / Timing Role: Low-power ADC converting analog sensor outputs only during scheduled wake-up intervals to minimize duty-cycle energy use. Use Value: 550 nA power-down current at 5.25 V enables >10-year shelf life on primary lithium batteries with periodic sampling.	Use Scenario: Occupancy and air quality sensing behind automotive dashboards exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Dual-input ADC digitizing cabin temperature and PM2.5 sensor outputs with robust ESD protection (1.5 kV HBM). Use Value: Qualified to 125°C junction temperature and featuring 100 Ω mux on-resistance at 2.5 V ensures stable performance despite dashboard thermal gradients.

Portable Medical Sensors

Industrial Process Monitoring

Use Scenario: Continuous vital sign acquisition (ECG, SpO₂) in handheld patient monitors powered by rechargeable Li-ion cells.

IC Role / Device Role / Timing Role: Dual-channel ADC digitizing differential analog front-end outputs with precise timing alignment via shared CONVST.

Use Value: 1.4 mW power at 1 MSPS extends battery life beyond 8 hours while maintaining diagnostic-grade 70 dB SNR and ±0.7 LSB INL.

Use Scenario: Multi-point temperature and pressure sensing in factory-floor PLC analog input modules.

IC Role / Device Role / Timing Role: 2-channel SAR ADC acquiring isolated sensor signals with integrated 2.5 V reference eliminating calibration drift over temperature.

Use Value: −40°C to +125°C rating and 5 ppm/°C reference drift ensure stable 12-bit accuracy across harsh industrial environments without recalibration.

Wireless Sensor Nodes

Automotive Cabin Sensors

Use Scenario: Battery-powered environmental sensor clusters (CO₂, humidity, VOC) transmitting data via BLE or LoRaWAN.

IC Role / Device Role / Timing Role: Low-power ADC converting analog sensor outputs only during scheduled wake-up intervals to minimize duty-cycle energy use.

Use Value: 550 nA power-down current at 5.25 V enables >10-year shelf life on primary lithium batteries with periodic sampling.

Use Scenario: Occupancy and air quality sensing behind automotive dashboards exposed to wide thermal cycling.

IC Role / Device Role / Timing Role: Dual-input ADC digitizing cabin temperature and PM2.5 sensor outputs with robust ESD protection (1.5 kV HBM).

Use Value: Qualified to 125°C junction temperature and featuring 100 Ω mux on-resistance at 2.5 V ensures stable performance despite dashboard thermal gradients.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, low-power SAR ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS7028IRTER	8-channel, 12-bit, 1 MSPS; SPI interface; no internal reference; requires external 2.5 V ref; 1.8 V to 5.5 V supply.	Higher channel count but no integrated reference - increases BOM cost and layout complexity for 2-channel use cases.	Select ADS7028IRTER only if future expansion to >2 channels is certain; AD7091R-2BCPZ-RL7 offers lower system-level cost and smaller footprint for fixed dual-input designs.
MAX11102ETE+T	2-channel, 12-bit, 500 kSPS; internal 2.048 V reference; 2.7 V to 3.6 V supply only; 10-lead TDFN package.	Half the throughput and narrower supply range - unsuitable for 1 MSPS or wide-input-voltage industrial applications.	Choose MAX11102ETE+T for ultra-low-cost, low-throughput consumer devices; AD7091R-2BCPZ-RL7 provides 2× speed, wider VDD, and superior SNR for professional instrumentation.

Compared with ADS7028IRTER and MAX11102ETE+T, AD7091R-2BCPZ-RL7 uniquely balances 1 MSPS throughput, integrated 2.5 V reference, −40°C to +125°C operation, and 16-lead LFCSP packaging - making it optimal for space-constrained, battery-aware, high-accuracy dual-sensor systems where BOM simplification and thermal robustness are design priorities.

Availability

AD7091R-2BCPZ-RL7 is available at Aetrix Electronics and suitable for battery-powered systems, industrial process monitoring, and automotive cabin sensors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7091R-2BCPZ-RL7 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 with precision data conversion and power management solutions.

The AD7091R-2BCPZ-RL7 belongs to Analog Devices' ultralow-power SAR ADC product line, designed specifically for energy-constrained, high-accuracy sensor interface applications where minimal power, small footprint, and guaranteed performance across extreme temperatures are essential.

FAQ

What is the maximum sampling rate supported by the AD7091R-2BCPZ-RL7?

The AD7091R-2BCPZ-RL7 supports a maximum throughput rate of 1 MSPS, achieved with a minimum conversion cycle time of 1000 ns. This rate is sustained across its full operating temperature range (−40°C to +125°C) and supply voltage range (2.7 V to 5.25 V), with no pipeline latency or dead time between conversions - ensuring deterministic timing for real-time control applications.

Does the AD7091R-2BCPZ-RL7 include an internal voltage reference?

Yes, the AD7091R-2BCPZ-RL7 integrates a precision 2.5 V voltage reference with ±0.01 V initial accuracy and 5 ppm/°C typical drift over temperature. The REFIN/REFOUT pin serves as both output and input, allowing users to either use the internal reference or overdrive it with an external 1.0 V to VDD reference - providing flexibility without requiring additional reference ICs in most designs.

Can the AD7091R-2BCPZ-RL7 operate from a 1.8 V digital supply?

Yes, the AD7091R-2BCPZ-RL7 supports VDRIVE from 1.8 V to 5.25 V independently of VDD, enabling direct interfacing with 1.8 V microcontrollers or FPGAs. However, at VDRIVE = 1.8 V, the maximum achievable throughput drops to less than 1 MSPS due to increased SCLK timing constraints - full 1 MSPS operation requires VDRIVE ≥ 2.7 V.

What package type is used for the AD7091R-2BCPZ-RL7?

The AD7091R-2BCPZ-RL7 is supplied in a 16-lead, 4 mm × 4 mm LFCSP package with exposed thermal pad (EPAD). This RoHS-compliant, lead-free package provides excellent thermal performance and compact footprint - critical for dense PCB layouts in portable and automotive electronics where board space and heat dissipation are constrained.

How does the AD7091R-2BCPZ-RL7 handle power management in battery applications?

The AD7091R-2BCPZ-RL7 offers two distinct power modes: normal mode (1.4 mW at 3 V / 1 MSPS) and power-down mode (435 nA typical at 3 V). Its programmable power-down entry/exit via SPI register control enables precise energy budgeting - for example, waking the ADC only during scheduled sensor reads, then returning to sub-µA sleep, extending battery life in wireless sensor nodes using AD7091R-2BCPZ-RL7.

AD7091R-2BCPZ-RL7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 16-WQFN Exposed Pad, CSP

Packaging:: Tape & Reel (TR)

Product Status:: Active

Number of Bits:: 12

Sampling Rate (Per Second):: 1M

Number of Inputs:: 2

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:: 16-LFCSP-WQ (4x4)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

AD7091R-2BCPZ-RL7 FAQ

1.How can I place an order for AD7091R-2BCPZ-RL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AD7091R-2BCPZ-RL7 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-2BCPZ-RL7 reliable?

The price and inventory of AD7091R-2BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7091R-2BCPZ-RL7 is usually 5 days.

3.What payment methods are accepted for AD7091R-2BCPZ-RL7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7091R-2BCPZ-RL7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD7091R-2BCPZ-RL7?

AD7091R-2BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD7091R-2BCPZ-RL7 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-2BCPZ-RL7?

For technical support, including AD7091R-2BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7091R-2BCPZ-RL7 requirements.

6.How does Aetrix verify that AD7091R-2BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?

All AD7091R-2BCPZ-RL7 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-2BCPZ-RL7 meets industry standards.

7.What is the process for return or replacement of AD7091R-2BCPZ-RL7?

All AD7091R-2BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7091R-2BCPZ-RL7, 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-2BCPZ-RL7 part is unused and in its original packaging.

Return procedure for AD7091R-2BCPZ-RL7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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