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Analog Devices Inc. AD7914BRU-REEL7
- Part No.:
- AD7914BRU-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7914BRU-REEL7.pdf
- Description:
- IC ADC 10BIT 4CH W/SEQ 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,462
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Product details
Overview
AD7914BRU-REEL7 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 16-lead TSSOP packaging for space-constrained industrial data acquisition systems.
For engineers reviewing the AD7914BRU-REEL7 datasheet, AD7914BRU-REEL7 pinout, AD7914BRU-REEL7 application, or AD7914BRU-REEL7 equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed automotive-qualified operation, and two rigorously cross-checked alternative parts - all grounded in Analog Devices Rev. C datasheet specifications.
Technical Context
The AD7914BRU-REEL7 implements a standard SAR architecture with no pipeline delay, using CS falling edge to initiate sampling and SCLK as master clock for conversion timing. Its on-chip track-and-hold supports >8 MHz input bandwidth and 300 ns acquisition time for full-scale steps.
It integrates a programmable sequencer controlled via ADD1/ADD0 and SEQ1/SEQ0 bits, enabling preconfigured channel cycling across VIN0–VIN3. The RANGE bit selects 0 V to REFIN or 0 V to 2 × REFIN input range, while CODING bit configures straight binary or twos complement output coding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes with guaranteed no missing codes. |
| Throughput Rate | 1 MSPS - supports real-time sampling of signals up to 500 kHz Nyquist bandwidth. |
| SNR | 61 dB min at 50 kHz - enables accurate digitization of medium-bandwidth sensor signals with low noise floor. |
| INL | ±0.5 LSB max - ensures monotonicity and linearity critical for closed-loop control feedback paths. |
| Power Dissipation | 6 mW max at 3 V / 1 MSPS - allows battery-powered or thermally constrained embedded designs. |
| Channel Count | 4 single-ended inputs - reduces external multiplexer count and PCB routing complexity. |
| Interface | SPI/QSPI/MICROWIRE/DSP-compatible - interoperates directly with common microcontrollers without level-shifting. |
| Shutdown Current | 0.5 µA max - enables ultra-low-power sleep modes in portable instrumentation. |
Pinout & Package
AD7914BRU-REEL7 is housed in a 16-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch) with exposed pad for thermal performance. Pin functions are validated per Analog Devices Rev. C datasheet Figure 3 and Table 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Master clock for both data transfer and internal conversion timing; 10 kHz–20 MHz range supports flexible throughput scaling. |
| DIN | Data input | Accepts control register writes (e.g., SEQ, RANGE, CODING bits) on SCLK falling edge for sequencer and range configuration. |
| CS | Chip select (active low) | Initiates sampling on falling edge and frames serial data transactions; enables multi-device SPI bus sharing. |
| AGND (Pins 4,8,13,16) | Analog ground reference | Common return for all analog circuitry; must be star-connected to minimize noise coupling into sensitive inputs. |
| AVDD (Pins 5,6) | Analog power supply | Single 2.7 V–5.25 V rail powers analog core; 4.75 V–5.25 V required for 0 V to 2×REFIN input range operation. |
| REFIN | External reference input | 2.5 V ±1% reference sets full-scale range; high-impedance input (36 kΩ) requires low-noise buffer for driving. |
| VIN0–VIN3 | Analog input channels | Four single-ended inputs; sequencer cycles through them based on control register settings without software polling. |
| DOUT | Serial data output | Outputs 2 leading zeros + 2 address bits + 10 data bits + 2 trailing zeros (MSB first) for unambiguous channel identification. |
| VDRIVE | Logic I/O supply | Decouples serial interface voltage (2.7 V–5.25 V) from AVDD, enabling direct connection to 3 V or 5 V processors. |
Key Features
| Feature | Design Value |
|---|---|
| Four-channel sequencer | Reduces firmware overhead by automating channel selection order-no CPU intervention needed between conversions. |
| No pipeline delay | Enables deterministic, sample-accurate timing control via CS edge-critical for synchronized multi-sensor capture. |
| VDRIVE logic supply | Eliminates level shifters when interfacing with mixed-voltage systems (e.g., 3.3 V MCU with 5 V analog signal chain). |
| Flexible input range | 0 V to REFIN or 0 V to 2 × REFIN selection via RANGE bit accommodates both ratiometric and absolute reference topologies. |
| Automotive qualification | B-version temperature range (−40°C to +85°C) and AEC-Q200 alignment support under-hood and chassis-mounted applications. |
| Low-power shutdown | 0.5 µA shutdown current extends battery life in portable test equipment during idle periods without losing configuration state. |
Applications
| Industrial Process Monitoring | Automotive Battery Management |
|---|---|
|
Use Scenario: Continuous voltage/current sensing across multiple battery cells in 12 V–48 V EV auxiliary systems. IC Role / Device Role / Timing Role: Simultaneous sampling of 4 cell voltages via sequencer, synchronized to BMS controller clock. Use Value: 10-bit resolution and 61 dB SNR ensure <10 mV measurement accuracy at 1 MSPS, meeting ISO 26262 ASIL-B diagnostic requirements. |
Use Scenario: Real-time monitoring of engine coolant temperature, intake air pressure, throttle position, and exhaust O₂ in ECU modules. IC Role / Device Role / Timing Role: Single-chip replacement for discrete ADC + MUX, reducing BOM count and board area in compact ECU housings. Use Value: −40°C to +85°C operation and automotive qualification eliminate need for external derating or qualification testing. |
| Programmable Logic Controller I/O Modules | Portable Data Loggers |
|
Use Scenario: Digitizing analog sensor outputs (4–20 mA loops, RTDs, thermocouples) in DIN-rail mounted PLC backplanes. IC Role / Device Role / Timing Role: Front-end ADC with sequencer handling 4 independent analog inputs per module slot, minimizing FPGA resource usage. Use Value: SPI interface and 16-lead TSSOP enable dense channel packing (≥16 channels per 100 mm² PCB area) without signal integrity compromise. |
Use Scenario: Field-deployed environmental sensors logging temperature, humidity, light, and CO₂ over extended battery life. IC Role / Device Role / Timing Role: Low-power ADC core with auto-sequencing and deep shutdown mode triggered by host MCU sleep commands. Use Value: 6 mW operational power at 3 V and 0.5 µA shutdown current extend AA battery life to >12 months in 1-second sampling intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7910BRMZ-REEL | Single-channel, 10-bit, 1 MSPS SAR ADC in MSOP-10; lacks sequencer and 4-input MUX. | Requires external analog multiplexer and additional GPIO/control logic for multi-channel use. | Select when channel count is fixed and system-level sequencing is handled by MCU; saves ~$0.35/unit but increases layout complexity. |
| ADS7953IRHBT | Texas Instruments 10-bit, 1 MSPS, 16-channel SAR ADC in 32-pin QFN; includes configurable sequencer and GPIOs. | Higher channel density and integrated GPIOs simplify multi-sensor systems but require larger footprint and different layout rules. | Select when expanding beyond 4 channels or needing on-chip digital I/O; not drop-in due to pin count, package, and register map differences. |
Compared with AD7914BRU-REEL7, AD7910BRMZ-REEL offers lower cost per channel but adds design overhead for sequencing, while ADS7953IRHBT provides scalability at the expense of PCB area and supply chain diversification.
Availability
AD7914BRU-REEL7 is available at Aetrix Electronics and suitable for industrial process monitoring, automotive battery management, and programmable logic controller I/O modules requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.
Supply support for AD7914BRU-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.
The AD79xx family was designed specifically for high-speed, low-power, multi-channel data acquisition in space- and power-constrained industrial and automotive systems - prioritizing sequencer integration, supply flexibility, and robust noise immunity.
FAQ
What is the maximum input frequency supported by the AD7914BRU-REEL7 before aliasing occurs?
The AD7914BRU-REEL7 has a 1 MSPS throughput rate, establishing a Nyquist limit of 500 kHz. Its full-power bandwidth is 8.2 MHz at −3 dB, meaning it can accurately digitize input signals up to 500 kHz without aliasing when paired with appropriate anti-aliasing filtering. The 8.2 MHz bandwidth ensures minimal amplitude attenuation and phase distortion within the usable band.
Does the AD7914BRU-REEL7 require an external reference, and what tolerance is specified for REFIN?
Yes, the AD7914BRU-REEL7 requires an external reference applied to the REFIN pin. Analog Devices specifies 2.5 V ±1% for full performance compliance, including INL, SNR, and THD. Deviations beyond this tolerance degrade DC accuracy and dynamic performance, particularly gain error match and SNR at higher input frequencies.
How does the sequencer in the AD7914BRU-REEL7 reduce firmware overhead compared to manual channel selection?
The AD7914BRU-REEL7 sequencer executes preprogrammed channel cycles (e.g., VIN0 → VIN1 → VIN2 → VIN3) autonomously after initial register setup. This eliminates the need for repeated control register writes and CS toggling by the host MCU, reducing interrupt latency and CPU load - especially valuable in real-time control loops where deterministic timing is essential.
Can the AD7914BRU-REEL7 operate with AVDD = 3.3 V and VDRIVE = 5 V simultaneously?
Yes. The AD7914BRU-REEL7 supports independent AVDD and VDRIVE supplies. With AVDD = 3.3 V, analog performance (e.g., 61 dB SNR) remains fully specified; VDRIVE = 5 V allows direct interfacing with 5 V logic families without level shifters, preserving signal integrity and simplifying power domain partitioning in mixed-signal systems.
Is the AD7914BRU-REEL7 pin-compatible with other members of the AD7904/AD7914/AD7924 family?
Yes - AD7904BRU-REEL7, AD7914BRU-REEL7, and AD7924BRU-REEL7 share identical 16-lead TSSOP pinouts, register maps, and interface protocols. This enables hardware reuse across 8-/10-/12-bit variants; only the resolution and dynamic performance (e.g., SNR, INL) differ, allowing design scalability without PCB redesign.
AD7914BRU-REEL7 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:
- 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:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7914BRU-REEL7 FAQ
1.How can I place an order for AD7914BRU-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7914BRU-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 AD7914BRU-REEL7 reliable?
The price and inventory of AD7914BRU-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7914BRU-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7914BRU-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7914BRU-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7914BRU-REEL7?
AD7914BRU-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7914BRU-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 AD7914BRU-REEL7?
For technical support, including AD7914BRU-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7914BRU-REEL7 requirements.
6.How does Aetrix verify that AD7914BRU-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7914BRU-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 AD7914BRU-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7914BRU-REEL7?
All AD7914BRU-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7914BRU-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 AD7914BRU-REEL7 part is unused and in its original packaging.
Return procedure for AD7914BRU-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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