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Analog Devices Inc. AD7091RBRMZ-RL7
- Part No.:
- AD7091RBRMZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7091RBRMZ-RL7.pdf
- Description:
- IC ADC 12BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,458
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Product details
Overview
AD7091RBRMZ-RL7 from Analog Devices is a 12-bit successive approximation ADC with ultralow power consumption (349 µA typical at 3 V, 1 MSPS), 1 MSPS throughput, ±1 LSB INL, internal 2.5 V reference (±4.5 ppm/°C drift), and operation from 2.7 V to 5.25 V supply - used in battery-powered handheld meters and medical instrumentation for high-accuracy, low-power data acquisition.
For engineers reviewing the AD7091RBRMZ-RL7 datasheet, AD7091RBRMZ-RL7 pinout, AD7091RBRMZ-RL7 application, or AD7091RBRMZ-RL7 equivalent, key selection considerations include its 10-lead LFCSP package, VDRIVE interface voltage flexibility (1.65 V–5.25 V), BUSY-indicator–capable SPI-compatible serial interface, and power-down mode reducing current to 264 nA at 3 V.
Technical Context
The AD7091RBRMZ-RL7 implements a charge redistribution SAR architecture with on-chip track-and-hold amplifier supporting >7 MHz full-power bandwidth and 350 ns acquisition time. It uses an internal oscillator for conversion timing and requires no external clock for core operation.
Its dual-supply design separates analog power (VDD) from digital I/O logic level (VDRIVE), enabling direct interfacing with 1.8 V or 3.3 V processors. The REFIN/REFOUT pin supports either internal 2.5 V reference (with 2.2 µF decoupling) or external reference overdrive (2.7 V–VDD).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precision measurement applications. |
| Throughput Rate | 1 MSPS - enables real-time sampling of fast transients in diagnostic monitoring systems. |
| INL | ±1 LSB max - ensures monotonicity and <0.025% end-point linearity error across full scale. |
| Supply Current (Active) | 349 µA typical at 3 V, 1 MSPS - allows >100-hour runtime on a 35-mAh coin cell in burst-sampling mode. |
| Supply Current (Power-down) | 264 nA typical at 3 V - reduces average power by >1000× between conversions for energy harvesting nodes. |
| Reference | Internal 2.5 V ±4.5 ppm/°C - eliminates external reference component while maintaining <0.01% tempco over −40°C to +125°C. |
| Input Range | 0 V to VREF - simplifies signal conditioning with single-supply op amps referenced to same VREF. |
Pinout & Package
AD7091RBRMZ-RL7 is packaged in a 10-lead, 3 mm × 2 mm LFCSP (Lead Frame Chip Scale Package) with exposed pad for thermal and mechanical reliability. Pin 11 (EPAD) must be soldered to GND for optimal thermal performance and solder joint integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Analog power supply input | 2.7 V–5.25 V supply; requires 10 µF + 0.1 µF local decoupling for stable SAR conversion. |
| REFIN/REFOUT | Reference input/output node | Accesses internal 2.5 V reference or accepts external 2.7 V–VDD reference; needs 2.2 µF decoupling cap. |
| VIN | Analog input | Single-ended input with 0 V to VREF range; 7 pF acquisition-phase capacitance demands low-Z drive. |
| REGCAP | Internal regulator bypass | 1.8 V output for internal circuitry; requires dedicated 1 µF decoupling to prevent reference noise coupling. |
| GND | Analog ground reference | Common return for all analog circuitry; must be separated from digital ground to avoid SNR degradation. |
| CONVST | Conversion start trigger | Falling-edge–sensitive; initiates hold mode and conversion without requiring precise timing alignment. |
| CS | Chip select | Active-low SPI frame control; enables SDO output and defines data transaction boundaries. |
| SCLK | Serial clock input | Accepts up to 50 MHz clock; falling edge clocks out MSB-first 12-bit data on SDO. |
| SDO | Serial data output | Three-state output with BUSY indicator option (pull-up to VDRIVE); outputs conversion result after t1 delay. |
| VDRIVE | Digital I/O supply | Defines logic levels (1.65 V–5.25 V); allows direct connection to 1.8 V/2.5 V/3.3 V/5 V microcontrollers. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow active power | 349 µA at 3 V, 1 MSPS - enables continuous 1 MSPS sampling in portable devices with <1.3 mW total dissipation. |
| VDRIVE interface independence | Separate 1.65 V–5.25 V logic supply - eliminates level shifters when interfacing with mixed-voltage SoCs. |
| On-chip 2.5 V reference | ±4.5 ppm/°C drift - achieves <±0.1% reference error over industrial temperature range without calibration. |
| Flexible power management | Hardware-controlled power-down mode with 264 nA quiescent current - supports duty-cycled sensing in IoT endpoints. |
| High-speed SPI-compatible interface | 50 MHz SCLK support with MSB-first output - enables sub-microsecond data readout compatible with ARM Cortex-M DMA engines. |
Applications
| Handheld Multimeter | Portable ECG Monitor |
|---|---|
Use Scenario: Battery-powered field multimeter acquiring DC voltage, current, and resistance with 12-bit resolution and autoranging. IC Role / Device Role / Timing Role: Primary data acquisition front-end ADC performing single-shot or burst conversions triggered by user button press. Use Value: 349 µA active current extends alkaline AA battery life to >500 hours; internal reference eliminates BOM cost and layout area for external REF. | Use Scenario: Wearable cardiac monitor capturing lead-II ECG signals at ≥1 kSPS with clinical-grade linearity. IC Role / Device Role / Timing Role: Precision analog input channel digitizing conditioned biopotential signals before digital filtering and Bluetooth transmission. Use Value: ±1 LSB INL ensures accurate ST-segment measurement; 7.5 MHz full-power bandwidth preserves QRS complex fidelity without external antialiasing. |
| Wireless Sensor Node | Energy Harvesting System |
Use Scenario: LoRaWAN node measuring temperature, humidity, and vibration using piezoelectric or MEMS sensors. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during scheduled sensor reads, synchronized to RF transmit windows. Use Value: 264 nA power-down current minimizes quiescent drain on supercapacitor storage; CONVST-triggered acquisition avoids timer overhead in MCU firmware. | Use Scenario: Solar- or thermal-harvested power system monitoring battery voltage and harvest source efficiency. IC Role / Device Role / Timing Role: High-impedance voltage monitor sampling infrequently (<1 Hz) with guaranteed monotonicity across temperature. Use Value: Internal 2.5 V reference remains stable down to 2.7 V VDD, enabling reliable measurements even as harvested voltage sags near cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7042IRUGR | 12-bit, 1 MSPS, 290 µA active current, 10-pin X2QFN, no internal reference (requires external REF) | Requires external 2.5 V reference and additional decoupling; lower active current but higher BOM count | Preferred when board space is constrained and reference already exists elsewhere in system |
| MAX11100ETE+ | 12-bit, 1 MSPS, 450 µA active current, 16-pin TQFN, internal 4.096 V reference, SPI+BUSY | Higher reference voltage increases dynamic range for high-VIN signals; larger package and higher power | Selected when 4.096 V reference simplifies scaling for 0–4 V industrial sensors |
Compared with ADS7042IRUGR and MAX11100ETE+, the AD7091RBRMZ-RL7 uniquely combines internal 2.5 V reference, 10-lead LFCSP footprint, and lowest active current among pin-compatible 1 MSPS 12-bit SAR ADCs - making it optimal for space- and energy-constrained portable instrumentation.
Availability
AD7091RBRMZ-RL7 is available at Aetrix Electronics and suitable for battery-powered handheld meters, portable medical diagnostics, and wireless sensor networks requiring stable component supply with guaranteed long-term manufacturability.
Supply support for AD7091RBRMZ-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 since 1965.
The AD7091RBRMZ-RL7 belongs to Analog Devices' ultralow-power precision SAR ADC product line, engineered specifically for energy-constrained, high-accuracy data acquisition in portable and remote sensing applications.
FAQ
What is the maximum sampling rate supported by the AD7091RBRMZ-RL7?
The AD7091RBRMZ-RL7 supports a maximum throughput rate of 1 MSPS, achieved with a 50 MHz SCLK and burst-mode serial clocking. This rate is fully specified across the −40°C to +125°C temperature range and maintains ±1 LSB INL and 69 dB SNR performance per the Rev. B datasheet.
Does the AD7091RBRMZ-RL7 require an external reference voltage?
No, the AD7091RBRMZ-RL7 includes a factory-trimmed internal 2.5 V reference with ±4.5 ppm/°C typical drift. When using this reference, the REFIN/REFOUT pin must be decoupled with a 2.2 µF capacitor. An external reference (2.7 V to VDD) may be applied to the same pin to overdrive the internal reference if higher accuracy or different voltage is required.
What package type is used for the AD7091RBRMZ-RL7?
The AD7091RBRMZ-RL7 uses a 10-lead, 3 mm × 2 mm LFCSP (Lead Frame Chip Scale Package) with exposed pad (EPAD). This RoHS-compliant package provides superior thermal performance and board-level reliability when the EPAD is soldered to a GND plane, and enables compact layouts in space-sensitive portable designs.
How does the VDRIVE pin function on the AD7091RBRMZ-RL7?
The VDRIVE pin on the AD7091RBRMZ-RL7 sets the logic voltage level for all digital interface pins (CS, SCLK, SDO, CONVST), independent of the analog supply VDD. It accepts 1.65 V to 5.25 V, allowing direct connection to 1.8 V or 3.3 V microcontrollers without level-shifting circuitry - simplifying interface design and reducing component count.
What is the power consumption of the AD7091RBRMZ-RL7 in power-down mode?
In power-down mode, the AD7091RBRMZ-RL7 draws just 264 nA typical at 3 V and −40°C to +125°C, as specified in the Rev. B datasheet. This ultra-low quiescent current enables multi-year operation in energy-harvesting or coin-cell–powered applications where the ADC remains idle >99.9% of the time.
AD7091RBRMZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- 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:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7091RBRMZ-RL7 FAQ
1.How can I place an order for AD7091RBRMZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7091RBRMZ-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 AD7091RBRMZ-RL7 reliable?
The price and inventory of AD7091RBRMZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7091RBRMZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7091RBRMZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7091RBRMZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7091RBRMZ-RL7?
AD7091RBRMZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7091RBRMZ-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 AD7091RBRMZ-RL7?
For technical support, including AD7091RBRMZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7091RBRMZ-RL7 requirements.
6.How does Aetrix verify that AD7091RBRMZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7091RBRMZ-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 AD7091RBRMZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7091RBRMZ-RL7?
All AD7091RBRMZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7091RBRMZ-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 AD7091RBRMZ-RL7 part is unused and in its original packaging.
Return procedure for AD7091RBRMZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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