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Analog Devices Inc. AD7911AUJZ-REEL7
- Part No.:
- AD7911AUJZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
AD7911AUJZ-REEL7.pdf
- Description:
- IC ADC 10BIT SAR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,956
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Product details
Overview
AD7911AUJZ-REEL7 from Analog Devices is a 10-bit, dual-channel, successive approximation analog-to-digital converter (ADC) operating from a single 2.35 V to 5.25 V supply. It delivers 250 kSPS throughput, 61 dB SINAD at 100 kHz input, ±0.5 LSB INL, and 0 to VDD analog input range. It serves as the primary data acquisition front-end in portable medical sensors and battery-powered instrumentation.
For engineers reviewing the AD7911AUJZ-REEL7 datasheet, AD7911AUJZ-REEL7 pinout, AD7911AUJZ-REEL7 application, or AD7911AUJZ-REEL7 equivalent, key selection criteria include guaranteed no-missed-codes performance, channel-to-channel isolation of −90 dB, SPI-compatible serial interface timing, and TSOT-8 package compatibility with space-constrained PCB layouts.
Technical Context
The AD7911AUJZ-REEL7 implements a true successive approximation register (SAR) architecture with no pipeline delay, enabling deterministic conversion latency of 2.8 μs max. Sampling is triggered on the falling edge of CS, and conversion is synchronized to the SCLK signal-requiring exactly 14 clock cycles at 5 MHz for full 10-bit result readout.
Its internal track-and-hold amplifier supports full-power bandwidth up to 8.5 MHz (−3 dB) and acquires signals within 290 ns. The reference is derived directly from VDD, eliminating external reference components while maintaining 0 V to VDD input range and consistent gain scaling across supply voltages.
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 - enables real-time sampling of baseband signals up to ~125 kHz per Nyquist criterion. |
| SINAD @ 100 kHz | 61 dB min - defines usable dynamic range for precision sensor digitization in noisy environments. |
| INL / DNL | ±0.5 LSB max each - ensures accurate linearity for closed-loop control feedback and calibration-critical measurements. |
| Supply Range | 2.35 V to 5.25 V - supports direct interfacing with Li-ion, 3.3 V, and 5 V system rails without LDO overhead. |
| Power @ 250 kSPS | 4 mW typ at 3 V - enables >100-hour operation on a 200 mAh coin cell in burst-sampling mode. |
| Channel Isolation | −90 dB typ - prevents crosstalk between VIN0 and VIN1 during simultaneous multi-sensor monitoring. |
Pinout & Package
AD7911AUJZ-REEL7 is housed in an 8-lead TSOT (Thin Small Outline Transistor) package, 3 mm × 1.7 mm × 0.8 mm, with exposed pad for thermal enhancement and standard JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIN | Serial data input | Accepts 3-bit command stream on SCLK falling edges to select VIN0/VIN1; enables channel multiplexing without external logic. |
| SCLK | Serial clock input | Drives both data transfer and internal ADC conversion timing; supports variable rates from 10 kHz to 5 MHz for power-throughput trade-off. |
| CS | Active-low chip select | Initiates sample acquisition on falling edge and frames 13-bit serial output (2 leading zeros + channel ID + 10-bit data). |
| DOUT | Serial data output | Three-state output delivering MSB-first 10-bit result with embedded channel identifier bit for unambiguous dual-channel readout. |
| VIN0 / VIN1 | Analog input channels | Single-ended inputs referenced to GND; support 0 V to VDD range and ±0.3 μA leakage for high-impedance sensor interfacing. |
| VDD | Power supply | Provides both analog and digital supply; internally generates reference, eliminating need for external voltage reference IC. |
| GND | Analog ground | Common return for all analog circuitry; must be separated from digital ground at single-point connection to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic, cycle-accurate timing control for time-critical sampling triggers and synchronized multi-device acquisition. |
| Flexible serial clock management | Conversion rate scales linearly with SCLK frequency-reducing power at lower throughput by slowing clock without reconfiguring firmware. |
| Standby current ≤1 μA | Permits ultra-low-power sleep states between measurement bursts, extending battery life in intermittent-monitoring applications. |
| VDD-referenced conversion | Eliminates external reference component count and layout area while maintaining ratiometric accuracy against supply variation. |
| High channel isolation (−90 dB) | Supports independent digitization of two analog sources (e.g., temperature + pressure) on shared PCB without guard traces or shielding. |
Applications
| Portable ECG Monitor | Wireless Sensor Node |
|---|---|
Use Scenario: Continuous acquisition of differential lead-II ECG signal and respiration waveform using two separate analog front-ends. IC Role / Device Role / Timing Role: Dual-channel SAR ADC performing synchronized 250 kSPS sampling with channel identification to distinguish cardiac vs. respiratory data streams. Use Value: Eliminates need for two discrete ADCs or external MUX, reducing BOM cost and board area while preserving inter-channel timing integrity. |
Use Scenario: Battery-powered environmental node measuring temperature, humidity, and ambient light with periodic wake-up every 5 seconds. IC Role / Device Role / Timing Role: Low-power ADC acquiring two sensor outputs per wake cycle, entering 1 μA standby between conversions. Use Value: Achieves >2-year battery life on CR2032 via sub-μA shutdown current and no external reference or bias circuitry. |
| Handheld Multimeter | Industrial Current Loop Transmitter |
Use Scenario: Simultaneous measurement of AC voltage (VIN0) and DC current (VIN1) with auto-ranging and digital correction. IC Role / Device Role / Timing Role: Precision dual-input ADC providing ratiometric conversion against VDD, enabling accurate scaling without calibration drift. Use Value: Delivers ±0.5 LSB INL over −40°C to +85°C, supporting Class II handheld meter accuracy requirements without temperature compensation firmware. |
Use Scenario: Digitizing process sensor output (e.g., 4–20 mA loop voltage drop) and local temperature for cold-junction compensation in HART-enabled transmitters. IC Role / Device Role / Timing Role: Dual-channel ADC interfacing directly to op-amp buffers, with channel-selectable conversion controlled via microcontroller DIN line. Use Value: −90 dB channel isolation prevents 4–20 mA loop noise from corrupting thermocouple or RTD readings, improving field accuracy. |
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 |
|---|---|---|---|
| AD7921AUJZ-REEL7 | 12-bit resolution, 70 dB SINAD, higher power (13.5 mW at 5 V), same pinout and interface. | Required when >10-bit ENOB needed for vibration analysis or audio-band sensing. | Select AD7921AUJZ-REEL7 only if system SNR budget demands ≥70 dB; otherwise AD7911AUJZ-REEL7 offers better power efficiency at 10-bit precision. |
| ADS7822U | 12-bit, 200 kSPS, SPI-only interface, no channel ID bit, 8-pin SOIC package (larger footprint). | Limited to single-channel or externally multiplexed dual-channel use; lacks integrated channel tagging. | Choose ADS7822U only if legacy SOIC layout constraints exist and channel identification can be handled in firmware. |
Compared with AD7921AUJZ-REEL7, AD7911AUJZ-REEL7 trades 2-bit resolution for 3× lower active power at 3 V and identical timing determinism; versus ADS7822U, it provides native dual-channel framing and smaller TSOT-8 footprint but requires updated SPI driver logic for channel ID parsing.
Availability
AD7911AUJZ-REEL7 is available at Aetrix Electronics and suitable for portable medical instruments, wireless sensor nodes, handheld test equipment, and industrial loop transmitters requiring stable component supply and long-term production continuity.
Supply support for AD7911AUJZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7911AUJZ-REEL7 belongs to Analog Devices' precision SAR ADC product line, designed 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 AD7911AUJZ-REEL7?
The AD7911AUJZ-REEL7 supports a maximum throughput rate of 250 kSPS, achieved with a 5 MHz SCLK and 14-cycle serial readout. At this rate, conversion time is 2.8 μs max, and track-and-hold acquisition completes within 290 ns-enabling accurate sampling of signals up to 125 kHz under Nyquist criteria.
Does the AD7911AUJZ-REEL7 require an external voltage reference?
No, the AD7911AUJZ-REEL7 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 ICs or precision resistors, simplifying design and reducing BOM cost while maintaining ratiometric accuracy across supply variations.
How does channel selection work on the AD7911AUJZ-REEL7?
Channel selection on the AD7911AUJZ-REEL7 is performed via the DIN pin: a 3-bit command is clocked in on SCLK falling edges during CS assertion. The third MSB determines whether VIN0 or VIN1 is sampled. The DOUT stream includes a dedicated channel identifier bit, allowing unambiguous identification of which input was converted.
What is the power consumption of the AD7911AUJZ-REEL7 in standby mode?
The AD7911AUJZ-REEL7 draws ≤1 μA in full power-down mode, with typical current of 50 nA. This ultra-low standby current enables extended battery life in intermittently active systems-such as wireless sensor nodes waking every few seconds-without requiring external power gating circuitry.
Is the AD7911AUJZ-REEL7 pin-compatible with the AD7921AUJZ-REEL7?
Yes, the AD7911AUJZ-REEL7 and AD7921AUJZ-REEL7 share identical TSOT-8 pinout, electrical interface, timing specifications, and functional block diagram. They differ only in resolution (10-bit vs. 12-bit), dynamic performance (61 dB vs. 70 dB SINAD), and power consumption-making them drop-in replacements where resolution requirements allow.
AD7911AUJZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7911AUJZ-REEL7 FAQ
1.How can I place an order for AD7911AUJZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7911AUJZ-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 AD7911AUJZ-REEL7 reliable?
The price and inventory of AD7911AUJZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7911AUJZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7911AUJZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7911AUJZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7911AUJZ-REEL7?
AD7911AUJZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7911AUJZ-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 AD7911AUJZ-REEL7?
For technical support, including AD7911AUJZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7911AUJZ-REEL7 requirements.
6.How does Aetrix verify that AD7911AUJZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7911AUJZ-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 AD7911AUJZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7911AUJZ-REEL7?
All AD7911AUJZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7911AUJZ-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 AD7911AUJZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7911AUJZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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