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Analog Devices Inc. AD7914BRU-REEL
- Part No.:
- AD7914BRU-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7914BRU-REEL.pdf
- Description:
- IC ADC 10BIT 4CH W/SEQ 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:132
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Product details
Overview
AD7914BRU-REEL from Analog Devices is a 10-bit, 1 MSPS, 4-channel successive approximation ADC with integrated channel sequencer, operating from a single 2.7 V to 5.25 V supply and delivering 61 dB SNR at 50 kHz input frequency. It features four single-ended analog inputs, SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and 0.5 µA full shutdown current. It is used in multichannel data acquisition systems requiring high throughput and low power in space-constrained industrial sensor interfaces.
For engineers reviewing the AD7914BRU-REEL datasheet, AD7914BRU-REEL pinout, AD7914BRU-REEL application, or AD7914BRU-REEL equivalent, key selection considerations include its 10-bit resolution with ±0.5 LSB INL, 16-pin TSSOP package, sequencer-controlled 4-channel conversion, VDRIVE-independent logic interface, and automotive-qualified operation up to +125°C.
Technical Context
The AD7914BRU-REEL implements a standard successive approximation register (SAR) architecture with no pipeline delay, where sampling is triggered on the falling edge of CS and conversion is clocked by SCLK. Its internal track-and-hold amplifier supports >8 MHz input bandwidth and handles full-scale step inputs with ≤300 ns acquisition time.
It uses a programmable control register to configure input range (0 V to REFIN or 0 V to 2 × REFIN), output coding (straight binary or twos complement), and sequencer mode (fixed or user-defined channel order). The VDRIVE pin decouples logic-level compatibility (3 V or 5 V) from AVDD, enabling direct interfacing with mixed-voltage microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10 bits - delivers 1,024 distinct digital codes with guaranteed no missing codes. |
| Throughput Rate | 1 MSPS - supports real-time sampling of four channels at 250 kSPS each via sequencer. |
| SNR @ 50 kHz | 61 dB min - enables accurate digitization of medium-bandwidth sensor signals (e.g., strain gauges, RTDs). |
| INL | ±0.5 LSB max - ensures linearity critical for closed-loop control and precision measurement calibration. |
| Power Dissipation @ 3 V | 6 mW max at 1 MSPS - allows battery-powered or thermally constrained embedded designs. |
| Shutdown Current | 0.5 µA max - reduces system standby power without external switching circuitry. |
| Input Range Options | 0 V to REFIN (2.5 V) or 0 V to 2 × REFIN - selectable via RANGE bit for flexible signal scaling. |
Pinout & Package
AD7914BRU-REEL is housed in a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin 1 is marked by a dot; pins are numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK (Pin 1) | Serial clock input | Master clock for both data transfer and internal conversion timing; supports up to 20 MHz. |
| DIN (Pin 2) | Control register data input | Accepts configuration bits (SEQ1/SEQ0, RANGE, CODING) on falling SCLK edges. |
| CS (Pin 3) | Chip select / conversion trigger | Active-low signal that initiates sampling on falling edge and frames serial communication. |
| AGND (Pins 4, 8, 13, 16) | Analog ground reference | Common return for all analog circuitry; must be star-connected to minimize noise coupling. |
| AVDD (Pins 5, 6) | Analog power supply | Single 2.7–5.25 V supply powering analog core; requires local 10 µF + 100 nF decoupling. |
| REFIN (Pin 7) | External reference input | Accepts 2.5 V ±1% reference; impedance ~36 kΩ; determines full-scale range and accuracy. |
| VIN0–VIN3 (Pins 9–12) | Single-ended analog inputs | Four independent channels; internally multiplexed; unused inputs must be tied to AGND. |
| VDRIVE (Pin 15) | Digital I/O voltage reference | Sets logic levels independently of AVDD - enables direct connection to 3 V or 5 V processors. |
| DOUT (Pin 14) | Serial data output | MSB-first 10-bit result prefixed by two address bits and two leading zeros; tri-state capable. |
Key Features
| Feature | Design Value |
|---|---|
| Four-channel sequencer | Enables automatic round-robin or custom-order conversion of VIN0–VIN3 without host intervention. |
| No pipeline delay | Provides deterministic latency: sampling occurs precisely on CS falling edge; result available after fixed 16 SCLK cycles. |
| VDRIVE logic independence | Allows simultaneous use of 3 V microcontroller I/O and 5 V analog supply without level shifters. |
| Flexible input range selection | Supports both unipolar 0–2.5 V and 0–5 V ranges via RANGE bit, simplifying front-end design. |
| Automotive qualification | Qualified per AEC-Q100 Grade 1 (−40°C to +125°C), suitable for engine control and ADAS sensor nodes. |
Applications
| Industrial Sensor Hub | Automotive Battery Monitoring |
|---|---|
|
Use Scenario: Simultaneous readout of temperature, pressure, humidity, and current-sense signals in PLC I/O modules. IC Role / Device Role / Timing Role: 10-bit SAR ADC performing sequenced conversions across four analog inputs at 250 kSPS per channel. Use Value: Eliminates need for external multiplexer and timing controller; reduces BOM count and PCB area in DIN-rail mounted controllers. |
Use Scenario: Real-time monitoring of cell voltages and pack temperature in 12S Li-ion battery management systems. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC capturing four critical analog points with synchronized sampling. Use Value: Enables precise state-of-charge estimation using 61 dB SNR and ±0.5 LSB INL over automotive temperature range. |
| Medical Vital Sign Acquisition | Test & Measurement Front End |
|
Use Scenario: Compact wearable device acquiring ECG, skin conductance, respiration, and SpO₂ analog signals. IC Role / Device Role / Timing Role: Low-power 10-bit ADC operating at 3 V with 0.5 µA shutdown for extended battery life. Use Value: Meets clinical-grade linearity requirements while consuming only 6 mW at full 1 MSPS throughput. |
Use Scenario: Modular data logger capturing multi-sensor environmental data (vibration, acoustic, thermal) in field-deployed units. IC Role / Device Role / Timing Role: Sequencer-driven 4-channel ADC interfaced to ARM Cortex-M via SPI with no glue logic. Use Value: Simplifies firmware development through hardware-managed channel cycling and deterministic timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit, multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7910BRMZ-REEL | Single-channel, 10-bit, 1 MSPS SAR ADC in 10-lead MSOP; lacks sequencer and VIN1–VIN3 inputs. | Requires external multiplexer and timing control for 4-channel operation; higher system complexity. | Choose when board space is extremely limited and channel count can be reduced or managed externally. |
| ADS7953IRHBT | Texas Instruments 12-bit, 1 MSPS, 16-channel SAR ADC with integrated sequencer; 32-pin QFN package. | Higher resolution and channel count, but larger footprint and 5.5 V max AVDD (vs. AD7914BRU-REEL's 5.25 V). | Choose when future scalability to >4 channels or 12-bit precision is required, accepting larger package and different layout. |
Compared with AD7914BRU-REEL, AD7910BRMZ-REEL reduces integration at the cost of added external components, while ADS7953IRHBT increases channel count and resolution but requires redesign for 32-pin QFN layout and higher supply headroom.
Availability
AD7914BRU-REEL is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive battery monitors, medical wearables, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7914BRU-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD79xx family-including AD7914BRU-REEL-is designed for high-speed, low-power, multichannel data acquisition in industrial automation, automotive sensing, and portable instrumentation where precision, small size, and robust operation are essential.
FAQ
What is the maximum sampling rate supported by the AD7914BRU-REEL?
The AD7914BRU-REEL supports a maximum throughput rate of 1 MSPS. This is achieved with a 20 MHz SCLK and fixed 16-cycle conversion time. At this rate, the sequencer cycles through all four channels at 250 kSPS per channel, with no pipeline delay and deterministic timing controlled by the CS signal.
Does the AD7914BRU-REEL require an external reference voltage?
Yes, the AD7914BRU-REEL requires an external reference voltage applied to the REFIN pin. For specified performance, REFIN must be 2.5 V ±1%. The device supports two input ranges-0 V to REFIN or 0 V to 2 × REFIN-selected via the RANGE bit in the control register. No internal reference is provided.
How does the VDRIVE pin function in the AD7914BRU-REEL?
The VDRIVE pin sets the logic voltage level for the serial interface (SCLK, DIN, DOUT, CS) independently of AVDD. This allows the AD7914BRU-REEL to interface directly with 3 V or 5 V microcontrollers without level-shifting circuitry-even when AVDD operates at a different voltage within the 2.7 V to 5.25 V range.
Is the AD7914BRU-REEL qualified for automotive applications?
Yes, the AD7914BRU-REEL is qualified for automotive applications under AEC-Q100 Grade 1, supporting operation from −40°C to +125°C. It is explicitly listed in the "Automotive Products" section of the AD7904/AD7914/AD7924 datasheet Rev. C and meets reliability and stress-test requirements for engine bay and cabin-mounted electronics.
What is the purpose of the sequencer in the AD7914BRU-REEL?
The sequencer in the AD7914BRU-REEL automates consecutive conversions across VIN0–VIN3 without host processor intervention. Configured via SEQ1/SEQ0 bits, it supports fixed-order (0→1→2→3) or user-defined sequences, reducing firmware overhead and ensuring consistent inter-channel timing in multichannel acquisition systems.
AD7914BRU-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1M
- 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:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7914BRU-REEL FAQ
1.How can I place an order for AD7914BRU-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7914BRU-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 AD7914BRU-REEL reliable?
The price and inventory of AD7914BRU-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7914BRU-REEL is usually 5 days.
3.What payment methods are accepted for AD7914BRU-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7914BRU-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7914BRU-REEL?
AD7914BRU-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7914BRU-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 AD7914BRU-REEL?
For technical support, including AD7914BRU-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7914BRU-REEL requirements.
6.How does Aetrix verify that AD7914BRU-REEL is sourced from the original manufacturer or authorized distributors?
All AD7914BRU-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 AD7914BRU-REEL meets industry standards.
7.What is the process for return or replacement of AD7914BRU-REEL?
All AD7914BRU-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7914BRU-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 AD7914BRU-REEL part is unused and in its original packaging.
Return procedure for AD7914BRU-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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