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Analog Devices Inc. AD7441BRM-REEL7
- Part No.:
- AD7441BRM-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7441BRM-REEL7.pdf
- Description:
- IC ADC 10BIT W/DIFF INP 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AD7441BRM-REEL7 from Analog Devices is a 10-bit, pseudo-differential, successive approximation register (SAR) analog-to-digital converter (ADC) in an 8-lead SOT-23 package. It operates from a single 2.7 V to 5.25 V supply, achieves 1 MSPS throughput, delivers 61 dB minimum SINAD at 100 kHz input, and consumes only 4 mW at 3 V/1 MSPS - optimized for battery-powered data acquisition and portable instrumentation.
For engineers reviewing the AD7441BRM-REEL7 datasheet, AD7441BRM-REEL7 pinout, AD7441BRM-REEL7 application, or AD7441BRM-REEL7 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options with documented differences, and supply support for volume procurement and BOM continuity.
Technical Context
The AD7441BRM-REEL7 implements a SAR architecture with no pipeline delay, using dual capacitive DACs and a differential track-and-hold amplifier capable of handling input frequencies up to 3.5 MHz. Its conversion is initiated by the falling edge of CS and clocked by an external SCLK up to 18 MHz.
It supports SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface with MSB-first natural binary output: four leading zeros, then 10-bit result, followed by two trailing zeros. Reference voltage (100 mV to VDD) is applied externally to VREF, enabling flexible full-scale range scaling without internal reference overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1,024 discrete output codes; sufficient for medium-accuracy sensor digitization and control loop feedback. |
| Throughput Rate | 1 MSPS maximum - enables real-time sampling of signals up to 500 kHz (Nyquist), suitable for motor current sensing and audio-band monitoring. |
| SINAD @ 100 kHz | 61 dB minimum - corresponds to ~10.2 ENOB; ensures usable dynamic range for transducer interfaces with moderate noise floor requirements. |
| Power Dissipation | 4 mW max at 3 V/1 MSPS - allows continuous high-speed operation in energy-constrained systems like handheld meters without thermal derating. |
| INL / DNL | ±0.5 LSB max each - guarantees monotonicity and no missing codes across full temperature range (−40°C to +85°C), critical for closed-loop stability. |
| Reference Range | 100 mV to VDD - permits direct use of low-noise LDO outputs or precision bandgap references without level-shifting circuitry. |
| Aperture Jitter | 50 ps typical - limits sampling uncertainty to <0.03° phase error at 100 kHz, preserving signal integrity in time-sensitive measurements. |
Pinout & Package
AD7441BRM-REEL7 is housed in an 8-lead SOT-23 package (JEDEC MO-178AA), with 0.65 mm lead pitch and exposed pad not connected internally. The package supports reflow soldering per JEDEC J-STD-020 and is rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power Supply Input | Single 2.7 V–5.25 V supply; requires 0.1 μF ceramic + 10 μF tantalum decoupling to GND for stable conversion performance. |
| SCLK (Pin 2) | Serial Clock Input | Controls both data readout timing and internal SAR conversion clock; supports up to 18 MHz; determines throughput rate and power consumption. |
| SDATA (Pin 3) | Serial Data Output | Three-state, MSB-first natural binary stream: 4 leading zeros + 10-bit result + 2 trailing zeros; compatible with standard SPI master configurations. |
| CS (Pin 4) | Chip Select (Active Low) | Initiates conversion on falling edge; frames serial data transfer; enables hardware-triggered sampling synchronized to system timing. |
| GND (Pin 5) | Analog Ground | Common reference for VIN+, VIN−, VREF, and internal circuitry; must be star-connected to minimize ground bounce-induced INL error. |
| VIN− (Pin 6) | Inverting Analog Input | Provides pseudo-ground reference for VIN+; accepts dc offset (−0.1 V to +1.5 V) to enable single-ended signal digitization with common-mode rejection. |
| VIN+ (Pin 7) | Noninverting Analog Input | Differential input node; full-scale span = VREF; absolute voltage range tied to VIN− and VDD; supports rail-to-rail tracking during acquisition. |
| VREF (Pin 8) | External Reference Input | Accepts 100 mV–VDD reference; 2.5 V nominal; 10/30 pF input capacitance requires local 0.1 μF decoupling to suppress noise coupling into conversion result. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic latency (16 SCLK cycles fixed conversion time); essential for real-time control loops requiring precise sample-to-output timing. |
| Pseudo-differential input | Allows single-ended signal acquisition with common-mode noise rejection via VIN− biasing; eliminates need for external instrumentation amplifier in many sensor front-ends. |
| Flexible clock-speed power management | Lowering SCLK reduces conversion time and dynamic power linearly; combined with power-down mode (1 μA), enables adaptive power scaling across operating modes. |
| Wide supply range (2.7 V–5.25 V) | Supports direct interfacing with Li-ion battery (3.0–4.2 V), 3.3 V logic, and 5 V legacy systems without level shifters or regulators. |
| Guaranteed no missing codes | Validated over full temperature and supply range; ensures monotonic response required for position encoders, thermistor digitization, and safety-critical feedback paths. |
Applications
| Transducer Interface | Battery-Powered Systems |
|---|---|
Use Scenario: Digitizing output from strain gauges, RTDs, or piezoelectric sensors in industrial field instruments. IC Role / Device Role / Timing Role: ADC front-end with pseudo-differential input rejecting common-mode noise from long sensor cables and EMI. Use Value: 61 dB SINAD and ±0.5 LSB INL ensure accurate measurement resolution without external amplification or filtering. |
Use Scenario: Monitoring battery voltage, current, and temperature in portable medical devices or handheld test equipment. IC Role / Device Role / Timing Role: Low-power, high-throughput ADC acquiring multiple analog channels in burst mode to extend battery life. Use Value: 4 mW at 3 V/1 MSPS and 1 μA power-down current enable >100-hour runtime on coin-cell or single Li-ion cells. |
| Data Acquisition Systems | Portable Instrumentation |
Use Scenario: Multi-channel voltage logging in compact DAQ modules used for predictive maintenance or environmental monitoring. IC Role / Device Role / Timing Role: High-speed SAR ADC providing deterministic 1 MSPS sampling with zero pipeline latency for timestamp-critical capture. Use Value: Fixed 16-cycle conversion time simplifies firmware timing and eliminates FIFO buffering complexity in microcontroller-based DAQ designs. |
Use Scenario: Signal conditioning and digitization in handheld oscilloscopes, multimeters, or spectrum analyzers. IC Role / Device Role / Timing Role: Core ADC with SPI interface directly driven by ARM Cortex-M or DSP for real-time waveform reconstruction. Use Value: MSOP/SOT-23 footprint minimizes PCB area; SPI compatibility enables seamless integration with existing digital controller firmware stacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7451BRM-REEL7 | 12-bit resolution, 70 dB SINAD min, same pinout/package, identical interface and timing - higher accuracy at same speed and power envelope. | Used where ENOB > 11 bits required (e.g., precision sensor calibration, audio test equipment). | Select when resolution and dynamic range outweigh cost sensitivity; shares layout and firmware compatibility. |
| ADS7822U | 12-bit, 200 kSPS max, SPI-compatible, 2.7–5.25 V supply, but uses internal reference and lacks pseudo-differential input - different analog input structure. | Preferred in space-constrained designs where external reference elimination is prioritized over speed and noise rejection. | Choose only if throughput ≤200 kSPS is acceptable and common-mode noise immunity is not required. |
Compared with AD7441BRM-REEL7, AD7451BRM-REEL7 offers +2 bits resolution and +9 dB SINAD with identical footprint and interface, while ADS7822U trades speed and differential capability for integrated reference simplicity - making AD7441BRM-REEL7 optimal for balanced performance in portable, noise-prone environments.
Availability
AD7441BRM-REEL7 is available at Aetrix Electronics and suitable for transducer interface, battery-powered systems, and portable instrumentation requiring stable component supply across extended production lifecycles.
Supply support for AD7441BRM-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing operations worldwide.
AD7441BRM-REEL7 belongs to the AD7441/AD7451 family of low-power, high-speed SAR ADCs designed specifically for portable, battery-operated, and space-constrained data acquisition systems demanding precision without compromise on size or energy efficiency.
FAQ
What is the maximum sampling rate supported by the AD7441BRM-REEL7?
The AD7441BRM-REEL7 supports a maximum throughput rate of 1 MSPS, achieved with an 18 MHz serial clock (SCLK). At this rate, conversion completes in exactly 16 SCLK cycles (888 ns), and the device maintains specified DC accuracy and dynamic performance across its full operating temperature range (−40°C to +85°C). Lower SCLK frequencies proportionally reduce throughput and power consumption.
Does the AD7441BRM-REEL7 require an external reference voltage?
Yes, the AD7441BRM-REEL7 requires an external reference voltage applied to the VREF pin. It accepts inputs from 100 mV to VDD, with 2.5 V being the nominal specified value. The reference directly sets the full-scale input span (VIN+ − VIN−), and its stability and noise directly impact ADC accuracy - hence a local 0.1 μF ceramic capacitor is mandatory at the VREF pin.
What is the function of the VIN− pin on the AD7441BRM-REEL7?
The VIN− pin on the AD7441BRM-REEL7 serves as the inverting input and establishes the pseudo-ground reference point for the VIN+ signal. It accepts a small dc offset (−0.1 V to +1.5 V depending on VDD) to enable single-ended signal digitization while retaining partial common-mode noise rejection - eliminating the need for external differential amplifiers in many sensor interface applications.
Is the AD7441BRM-REEL7 pin-compatible with the AD7451BRM-REEL7?
Yes, the AD7441BRM-REEL7 and AD7451BRM-REEL7 share identical 8-lead SOT-23 pinouts, electrical interface timing, supply requirements, and package dimensions. They differ only in resolution (10-bit vs. 12-bit), dynamic performance (61 dB vs. 70 dB SINAD), and DC accuracy (±0.5 LSB vs. ±1 LSB INL), allowing drop-in replacement where higher resolution is needed without PCB revision.
What power-down current does the AD7441BRM-REEL7 draw?
The AD7441BRM-REEL7 draws a maximum of 1 μA in full power-down mode, regardless of supply voltage or SCLK state. This ultra-low quiescent current enables rapid wake-up (1 μs power-up time) and makes the device ideal for duty-cycled measurement systems where the ADC remains idle between bursts of activity to maximize battery longevity.
AD7441BRM-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- SPI, DSP
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7441BRM-REEL7 FAQ
1.How can I place an order for AD7441BRM-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7441BRM-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 AD7441BRM-REEL7 reliable?
The price and inventory of AD7441BRM-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7441BRM-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7441BRM-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7441BRM-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7441BRM-REEL7?
AD7441BRM-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7441BRM-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 AD7441BRM-REEL7?
For technical support, including AD7441BRM-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7441BRM-REEL7 requirements.
6.How does Aetrix verify that AD7441BRM-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7441BRM-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 AD7441BRM-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7441BRM-REEL7?
All AD7441BRM-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7441BRM-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 AD7441BRM-REEL7 part is unused and in its original packaging.
Return procedure for AD7441BRM-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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