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Analog Devices Inc. AD7911ARM-REEL7
- Part No.:
- AD7911ARM-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7911ARM-REEL7.pdf
- Description:
- IC ADC 10BIT DUAL 250KSPS 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:15,270
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Product details
Overview
AD7911ARM-REEL7 from Analog Devices is a 10-bit, dual-channel successive approximation ADC with 250 kSPS throughput, operating from a single 2.35 V to 5.25 V supply and delivering 61 dB SINAD at 100 kHz input. It features no pipeline delay, channel-to-channel isolation of −90 dB, and integrated track-and-hold for battery-powered data acquisition in portable medical instruments.
For engineers reviewing the AD7911ARM-REEL7 datasheet, AD7911ARM-REEL7 pinout, AD7911ARM-REEL7 application, or AD7911ARM-REEL7 equivalent, key selection considerations include its 10-bit resolution, 2.8 μs conversion time, TSOT-8 package, SPI-compatible serial interface, and guaranteed no-missed-codes performance across −40°C to +85°C.
Technical Context
The AD7911ARM-REEL7 implements a true successive approximation register (SAR) architecture with precise sampling controlled by the falling edge of CS, eliminating pipeline latency. Its internal track-and-hold amplifier supports full-power bandwidth up to 8.5 MHz and acquisition time ≤290 ns.
Conversion is initiated and synchronized entirely via the serial interface: DIN selects the input channel (VIN0/VIN1), SCLK clocks both data and conversion timing, and DOUT delivers 12-bit-aligned serial output including channel ID and two leading zeros followed by 10-bit data plus two trailing zeros.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - guarantees monotonic transfer function and no missing codes over full temperature range. |
| Throughput Rate | 250 kSPS maximum - enables real-time sampling of signals up to ~125 kHz Nyquist bandwidth. |
| SINAD @ 100 kHz | 61 dB min - defines usable dynamic range for medium-fidelity sensor digitization (e.g., ECG, pressure). |
| Conversion Time | 2.8 μs max - fixed 14-SCLK-cycle latency at 5 MHz SCLK; enables tight timing control in deterministic systems. |
| Supply Range | 2.35 V to 5.25 V - supports direct interfacing with Li-ion, 3.3 V, and 5 V logic domains without level shifters. |
| Power (3 V / 250 kSPS) | 6 mW max - enables continuous high-speed sampling in power-constrained portable devices. |
| Channel Isolation | −90 dB typ - prevents crosstalk between VIN0 and VIN1 during simultaneous or interleaved sampling. |
Pinout & Package
AD7911ARM-REEL7 is housed in an 8-lead TSOT package (2.1 mm × 1.6 mm × 0.55 mm height), optimized for space-constrained PCB layouts in handheld instrumentation and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIN (Pin 1) | Serial data input | Accepts 3-bit command on falling SCLK edges to select VIN0/VIN1; enables channel multiplexing without external logic. |
| SCLK (Pin 2) | Serial clock input | Drives both data transfer and internal ADC conversion timing; supports flexible throughput scaling via clock frequency. |
| CS (Pin 3) | Chip select (active low) | Initiates sampling on falling edge and frames serial data; allows multiple devices on shared bus with independent enable control. |
| DOUT (Pin 4) | Serial data output | Delivers 14-bit frame: two leading zeros + channel ID + invalid bit + 10-bit result + two trailing zeros; SPI/QSPI/MICROWIRE compatible. |
| VDD (Pin 5) | Power supply | Single 2.35–5.25 V rail powers analog core, reference (internally derived), and digital interface-no external reference required. |
| GND (Pin 6) | Analog ground | Common return for VIN0/VIN1 and internal circuitry; must be separated from digital ground to preserve SNR. |
| VIN0 (Pin 7) | Analog input channel 0 | Single-ended input referenced to GND; full-scale range = 0 V to VDD; 20 pF input capacitance requires careful driver design. |
| VIN1 (Pin 8) | Analog input channel 1 | Identical electrical characteristics to VIN0; matched offset/gain error (±0.3 LSB max) enables ratiometric dual-sensor measurement. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture ensures deterministic 2.8 μs conversion latency and immediate sample availability-critical for closed-loop control. |
| Internal VDD-referenced ADC | Eliminates need for external voltage reference; simplifies BOM and layout while maintaining 0 V to VDD input range. |
| Flexible serial clock management | SCLK frequency directly sets throughput (up to 5 MHz); lower clock rates reduce power consumption without sacrificing accuracy. |
| Ultra-low standby current | 1 μA max in full power-down mode (50 nA typical) extends battery life in intermittent-sampling applications like IoT sensors. |
| High channel isolation | −90 dB typ crosstalk enables accurate simultaneous monitoring of two independent analog sources (e.g., differential pair or dual sensors). |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Acquisition |
|---|---|
Use Scenario: Continuous vital sign monitoring (e.g., pulse oximetry, impedance pneumography) in handheld clinical devices with limited battery capacity. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing analog front-end outputs from optical and electrode sensors with synchronized sampling and minimal latency. Use Value: 10-bit resolution and 61 dB SINAD support diagnostic-grade signal fidelity; 6 mW power at 250 kSPS extends runtime per charge cycle. |
Use Scenario: Field-deployable environmental sensor nodes measuring temperature, humidity, and gas concentration over extended periods. IC Role / Device Role / Timing Role: Low-power, multi-sensor interface converting conditioned analog outputs into serial data for microcontroller ingestion and wireless transmission. Use Value: TSOT-8 footprint minimizes PCB area; 1 μA shutdown current enables years of operation on coin-cell batteries with duty-cycled sampling. |
| Optical Sensor Interface | Industrial Control Loop Monitoring |
Use Scenario: High-speed photodiode or CCD signal conditioning in compact optical encoders and laser alignment tools. IC Role / Device Role / Timing Role: Digitizing fast-rising analog pulses from transimpedance amplifiers with precise aperture timing and wide input bandwidth (8.5 MHz). Use Value: 30 ps aperture jitter and 71 dB SNR at 100 kHz ensure accurate amplitude and timing capture of optical events. |
Use Scenario: Real-time feedback acquisition in motor drive or power supply control systems requiring dual-voltage/current sensing. IC Role / Device Role / Timing Role: Simultaneous sampling of DC bus voltage and phase current for synchronous PWM modulation and fault detection. Use Value: Channel-to-channel isolation (−90 dB) prevents noise coupling between high-side and low-side measurements; no pipeline delay enables sub-microsecond loop response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7921ARM-REEL7 | 12-bit resolution, 70 dB SINAD min, 3.2 μs conversion time, same pinout and interface. | Higher precision required for vibration analysis or high-resolution thermocouple measurement. | Select when >10-bit ENOB is mandatory; shares identical layout and firmware interface but consumes slightly more power at full speed. |
| ADS7822U | 12-bit, 200 kSPS, 3.3 V only, MSOP-8, SPI-compatible, no internal reference (requires external VREF). | Legacy designs constrained to 3.3 V supply and needing external reference flexibility. | Choose for compatibility with existing 3.3 V-only platforms; requires additional reference IC and increases BOM count and layout complexity. |
Compared with AD7921ARM-REEL7, AD7911ARM-REEL7 trades 2-bit resolution and 9 dB SINAD for lower power and faster conversion; versus ADS7822U, it offers wider supply range and integrated reference but lacks 3.3 V-exclusive optimization.
Availability
AD7911ARM-REEL7 is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered data acquisition, optical sensor interface, and industrial control loop monitoring requiring stable component supply and long-term production continuity.
Supply support for AD7911ARM-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7911ARM-REEL7 belongs to Analog Devices' precision SAR ADC product line, engineered specifically for low-power, multi-channel data acquisition in space- and energy-constrained embedded systems.
FAQ
What is the maximum sampling rate supported by the AD7911ARM-REEL7?
The AD7911ARM-REEL7 supports a maximum throughput rate of 250 kSPS, achieved with a 5 MHz serial clock and 14 SCLK cycles per conversion. At this rate, conversion time is guaranteed ≤2.8 μs, and the device maintains full DC and AC specifications across its −40°C to +85°C operating range.
Does the AD7911ARM-REEL7 require an external voltage reference?
No, the AD7911ARM-REEL7 uses an internal reference derived from VDD, enabling a full-scale analog input range of 0 V to VDD. This eliminates the need for external reference components, reducing system cost, board area, and calibration complexity while maintaining consistent performance across supply voltage variations.
How does the AD7911ARM-REEL7 handle channel selection between VIN0 and VIN1?
The AD7911ARM-REEL7 selects the active analog input channel via the DIN pin: a logic high on DIN during the first SCLK falling edge after CS assertion configures VIN1, while logic low selects VIN0. The DOUT stream includes a dedicated channel identifier bit, allowing unambiguous identification of the source channel for each conversion result.
What is the power consumption of the AD7911ARM-REEL7 in normal operational mode?
In normal operational mode at 250 kSPS, the AD7911ARM-REEL7 draws ≤4 mA at 4.75–5.25 V (≤20 mW) and ≤2 mA at 2.35–3.6 V (≤6 mW). In full power-down mode, quiescent current drops to 1 μA maximum (typically 50 nA), making it suitable for ultra-low-power wake-on-event architectures.
Is the AD7911ARM-REEL7 pin-compatible with other members of the AD7911/AD7921 family?
Yes, the AD7911ARM-REEL7 shares identical pinout, package (TSOT-8), and serial interface protocol with AD7921ARM-REEL7 and all MSOP/TSOT variants in the AD7911/AD7921 family. This allows direct substitution where 10-bit resolution suffices, with no PCB or firmware changes required beyond adjusting expected data width and performance expectations.
AD7911ARM-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):
- 250k
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- 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:
- -
AD7911ARM-REEL7 FAQ
1.How can I place an order for AD7911ARM-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7911ARM-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 AD7911ARM-REEL7 reliable?
The price and inventory of AD7911ARM-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7911ARM-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7911ARM-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7911ARM-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7911ARM-REEL7?
AD7911ARM-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7911ARM-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 AD7911ARM-REEL7?
For technical support, including AD7911ARM-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7911ARM-REEL7 requirements.
6.How does Aetrix verify that AD7911ARM-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7911ARM-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 AD7911ARM-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7911ARM-REEL7?
All AD7911ARM-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7911ARM-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 AD7911ARM-REEL7 part is unused and in its original packaging.
Return procedure for AD7911ARM-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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