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Analog Devices Inc. AD7911ARMZ-REEL
- Part No.:
- AD7911ARMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7911ARMZ-REEL.pdf
- Description:
- IC ADC 10BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,177
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Product details
Overview
AD7911ARMZ-REEL 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 signal acquisition up to 8.5 MHz full-power bandwidth-used in portable medical instruments and battery-powered data acquisition systems.
For engineers reviewing the AD7911ARMZ-REEL datasheet, AD7911ARMZ-REEL pinout, AD7911ARMZ-REEL application, or AD7911ARMZ-REEL equivalent, key selection criteria include its 10-bit resolution with ±0.5 LSB INL/DNL, SPI/QSPI/MICROWIRE-compatible serial interface, 8-lead TSOT package, and low 4 mW power consumption at 3 V/250 kSPS-critical for space-constrained, low-power embedded sensing nodes.
Technical Context
The AD7911ARMZ-REEL 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 analog inputs from 0 V to VDD and achieves 290 ns acquisition time with 71 dB minimum SNR at 100 kHz.
Conversion timing is fully synchronous to SCLK (up to 5 MHz), requiring 14 clock cycles per sample. Channel selection is performed via DIN during CS assertion, and the DOUT stream includes a channel identifier bit followed by 10-bit straight-binary data-enabling deterministic, microprocessor-controlled dual-channel sampling without external multiplexing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes with guaranteed no missing codes. |
| Throughput Rate | 250 kSPS maximum - enables real-time capture of signals up to ~125 kHz Nyquist bandwidth. |
| SINAD @ 100 kHz | 61 dB min - ensures usable dynamic range for medium-fidelity sensor digitization. |
| INL / DNL | ±0.5 LSB max each - supports accurate linear measurement across full scale without calibration. |
| Supply Range | 2.35 V to 5.25 V - compatible with Li-ion, 3.3 V, and 5 V system rails without LDO overhead. |
| Power @ 3 V / 250 kSPS | 4 mW typ - enables >100-hour operation on a 100 mAh coin cell in burst-sampling mode. |
| Channel Isolation | −90 dB typ - prevents crosstalk between VIN0 and VIN1 in simultaneous dual-sensor monitoring. |
Pinout & Package
AD7911ARMZ-REEL is housed in an 8-lead TSOT package (3.0 mm × 3.0 mm × 0.8 mm), optimized for high-density PCB layouts in portable instrumentation. Pin assignments are validated per Analog Devices' Rev. A datasheet Figure 8 and Table 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIN | Serial data input | Accepts channel-select command on falling SCLK edge; determines which analog input (VIN0/VIN1) converts next. |
| SCLK | Serial clock input | Drives both data transfer and internal conversion timing; supports up to 5 MHz for minimal 2.8 μs conversion time. |
| CS | Active-low chip select | Initiates sampling on falling edge and frames serial communication; enables multi-device SPI bus sharing. |
| DOUT | Serial data output | Outputs 12-bit frame (2 leading zeros + channel ID + invalid bit + 10-bit result + 2 trailing zeros) MSB-first. |
| VDD | Analog/digital supply | Single 2.35–5.25 V rail powers all circuitry and serves as internal reference-simplifies BOM and layout. |
| GND | Analog ground reference | Common return for VIN0/VIN1 and internal circuitry; requires dedicated AGND plane for optimal SNR. |
| VIN0, VIN1 | Differential-capable single-ended inputs | Two independent analog inputs referenced to GND; each accepts 0 V to VDD range with 20 pF input capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture enables deterministic, one-shot conversions with zero-latency control loop integration. |
| Flexible power management | 1 μA max standby current and dynamic power-down mode reduce average consumption during idle intervals. |
| Internal VDD-referenced conversion | Eliminates need for external reference IC or precision resistor divider-reducing component count and board area. |
| SPI/QSPI/MICROWIRE/DSP compatibility | Interoperates with common microcontroller peripherals without protocol translation or glue logic. |
| High channel isolation | −90 dB typical crosstalk allows independent monitoring of two sensors (e.g., temperature + pressure) on same die. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous acquisition of ECG lead voltages and skin temperature in handheld diagnostic devices. IC Role / Device Role / Timing Role: Dual-channel SAR ADC samples two physiological signals synchronously with precise timing alignment and no inter-channel skew. Use Value: 10-bit resolution and −90 dB channel isolation preserve diagnostic fidelity while 4 mW power at 3 V extends clinical-grade runtime. |
Use Scenario: Field-deployed environmental monitors logging temperature, humidity, and light intensity over weeks on AA batteries. IC Role / Device Role / Timing Role: Low-power ADC interfaces with MCU to trigger conversions only during scheduled wake-up intervals using CS-controlled sampling. Use Value: 1 μA max standby current and VDD-referenced operation eliminate external reference, reducing quiescent draw to <10 μA system-wide. |
| Industrial Sensor Nodes | Optical Sensor Signal Conditioning |
Use Scenario: Wireless vibration sensors in predictive maintenance systems measuring accelerometer and microphone outputs. IC Role / Device Role / Timing Role: Dual-input ADC digitizes analog outputs from MEMS accelerometers and acoustic transducers with matched gain/offset tracking. Use Value: ±0.3 LSB offset error match and ±0.3 LSB gain error match enable ratiometric differential analysis without per-channel calibration. |
Use Scenario: Optical smoke detectors converting photodiode current into digital values for ambient light compensation and alarm thresholding. IC Role / Device Role / Timing Role: High-speed ADC captures transient optical pulses with 8.5 MHz full-power bandwidth and 290 ns acquisition time. Use Value: 71 dB minimum SNR at 100 kHz supports reliable detection of weak smoke-scattered signals amid electrical noise. |
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 |
|---|---|---|---|
| AD7921ARMZ-REEL | 12-bit resolution, 70 dB SINAD min, 16-cycle conversion time vs. 14 for AD7911ARMZ-REEL | Higher precision required for calibrated instrumentation; higher power (13.5 mW at 5 V) | Select when 12-bit accuracy and improved SFDR (−84 dB) outweigh cost and power trade-offs. |
| ADS7822U | 12-bit, 200 kSPS, 3 V only, SPI-only interface, no channel ID bit in DOUT stream | Limited to single-supply 3 V systems; lacks built-in channel identification for dual-input arbitration | Choose for legacy 3 V designs where lower throughput and absence of channel tagging are acceptable. |
Compared with AD7921ARMZ-REEL, AD7911ARMZ-REEL trades 2 bits of resolution for lower power and faster conversion; versus ADS7822U, it adds voltage flexibility and deterministic channel metadata-making it optimal for new 2.35–5.25 V dual-sensor platforms demanding balance of speed, accuracy, and efficiency.
Availability
AD7911ARMZ-REEL is available at Aetrix Electronics and suitable for battery-powered medical instruments, portable data loggers, and industrial sensor nodes requiring stable component supply across extended production lifecycles.
Supply support for AD7911ARMZ-REEL 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 design centers worldwide.
The AD7911ARMZ-REEL belongs to Analog Devices' precision SAR ADC product line, engineered specifically for low-power, dual-channel data acquisition in space- and energy-constrained embedded systems.
FAQ
What is the maximum sampling rate supported by the AD7911ARMZ-REEL?
The AD7911ARMZ-REEL supports a maximum throughput rate of 250 kSPS, achieved with a 5 MHz SCLK and 14 serial clock cycles per conversion. This corresponds to a minimum conversion time of 2.8 μs and enables Nyquist-limited signal capture up to 125 kHz. Performance remains stable across the full 2.35 V to 5.25 V supply range.
Does the AD7911ARMZ-REEL require an external voltage reference?
No, the AD7911ARMZ-REEL uses an internal reference derived from VDD, supporting a full-scale analog input range of 0 V to VDD. This eliminates the need for external reference components, simplifying design and reducing bill-of-materials cost-particularly valuable in compact, low-power applications like wearable sensors.
How does channel selection work on the AD7911ARMZ-REEL?
Channel selection on the AD7911ARMZ-REEL is performed via the DIN pin: a logic level applied to DIN during the falling edge of CS determines whether VIN0 or VIN1 is sampled. The DOUT serial stream includes a dedicated channel identifier bit, allowing unambiguous assignment of each 10-bit result to its source channel without external logic.
What package type is used for the AD7911ARMZ-REEL?
The AD7911ARMZ-REEL is supplied in an 8-lead TSOT package (3.0 mm × 3.0 mm × 0.8 mm), specified in Analog Devices' datasheet Rev. A. This thermally enhanced, surface-mount package supports automated assembly and provides adequate thermal performance (θJA = 207°C/W) for low-to-moderate power dissipation in dense PCB layouts.
Is the AD7911ARMZ-REEL compatible with standard SPI interfaces?
Yes, the AD7911ARMZ-REEL is fully compatible with SPI, QSPI, MICROWIRE, and DSP serial interfaces. It uses standard 4-wire operation (CS, SCLK, DIN, DOUT), supports MSB-first transmission, and tolerates SCLK duty cycles from 40/60 to 60/40-ensuring seamless integration with common microcontrollers including ARM Cortex-M and Renesas RX families.
AD7911ARMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.35V ~ 5.25V
- Voltage - Supply, Digital:
- 2.35V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7911ARMZ-REEL FAQ
1.How can I place an order for AD7911ARMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7911ARMZ-REEL 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 AD7911ARMZ-REEL reliable?
The price and inventory of AD7911ARMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7911ARMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7911ARMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7911ARMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7911ARMZ-REEL?
AD7911ARMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7911ARMZ-REEL 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 AD7911ARMZ-REEL?
For technical support, including AD7911ARMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7911ARMZ-REEL requirements.
6.How does Aetrix verify that AD7911ARMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7911ARMZ-REEL 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 AD7911ARMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7911ARMZ-REEL?
All AD7911ARMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7911ARMZ-REEL, 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 AD7911ARMZ-REEL part is unused and in its original packaging.
Return procedure for AD7911ARMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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