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Analog Devices Inc. AD7927WYRUZ-REEL7
- Part No.:
- AD7927WYRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7927WYRUZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,990
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Product details
Overview
AD7927WYRUZ-REEL7 from Analog Devices is a 12-bit, 8-channel, successive approximation ADC with integrated channel sequencer, operating at up to 200 kSPS with 3 V or 5 V single-supply power. It features 0 V to REFIN or 0 V to 2 × REFIN input ranges, SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface, and automotive-grade qualification (−40°C to +125°C). It is used in engine control units for multiplexed sensor signal acquisition.
For engineers reviewing the AD7927WYRUZ-REEL7 datasheet, AD7927WYRUZ-REEL7 pinout, AD7927WYRUZ-REEL7 application, or AD7927WYRUZ-REEL7 equivalent, key selection criteria include guaranteed no-missed-codes performance, channel-to-channel isolation of −82 dB at 400 kHz, 70 dB SINAD at 50 kHz, flexible VDRIVE logic-level independence, and sequencer-configurable multi-channel sampling without external timing logic.
Technical Context
The AD7927WYRUZ-REEL7 implements a standard SAR architecture with no pipeline delay, where conversion is initiated on the falling edge of CS and fully controlled by SCLK frequency (up to 20 MHz). Its track-and-hold amplifier supports >8 MHz full-power bandwidth and achieves 300 ns acquisition time for both sine-wave and full-scale step inputs.
It uses a 12-bit write-only control register to configure input range (RANGE bit), output coding (CODING bit), power mode (PM1/PM0), sequencer enable (SEQ/SHADOW), and channel address (ADD2–ADD0). The sequencer supports preprogrammed nonconsecutive or consecutive channel sequences via shadow register programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 1 LSB = 0.024% of full scale for precise sensor digitization |
| Throughput Rate | 200 kSPS maximum - enables real-time capture of fast transients in motor control feedback loops |
| SINAD | 69.5 dB min @ 5 V, 50 kHz - ensures ≥11.3 effective bits for high-fidelity analog monitoring |
| Channel Count | 8 single-ended inputs - reduces board space vs. discrete ADCs in multi-sensor systems |
| Supply Range | AVDD = 2.7 V to 5.25 V - supports direct integration into 3.3 V or 5 V automotive microcontroller domains |
| VDRIVE Range | 2.7 V to 5.25 V - allows independent logic-level interfacing to 3 V or 5 V host processors without level shifters |
| Operating Temp | −40°C to +125°C - qualified per AEC-Q100 for under-hood automotive applications |
| Power Dissipation | 3.6 mW max @ 3 V / 200 kSPS - enables thermally constrained designs in sealed ECUs |
Pinout & Package
AD7927WYRUZ-REEL7 is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin 1 is marked with a dot; pins 4, 8, 17, and 20 are AGND; pins 5 and 6 are AVDD; pin 19 is VDRIVE; and pins 16–9 correspond to VIN0–VIN7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK (Pin 1) | Master serial clock input | Drives both data transfer and internal conversion timing; 20 MHz max enables 800 ns conversion time |
| DIN (Pin 2) | Serial control data input | Loads 12-bit configuration register on falling SCLK edges; coexists with DOUT during full-duplex transfers |
| CS (Pin 3) | Active-low chip select | Initiates sampling on falling edge and frames serial communication; defines conversion start instant |
| VIN0–VIN7 (Pins 9–16) | Analog input channels | Single-ended inputs with programmable sequencer; unused channels must tie to AGND to prevent noise coupling |
| REFIN (Pin 7) | External reference voltage input | Requires 2.5 V ±1% source; sets full-scale range for both 0–REFIN and 0–2×REFIN modes |
| DOUT (Pin 18) | Serial conversion result output | Outputs 1 leading zero + 3 address bits + 12 data bits (MSB first); supports straight binary or twos complement |
| VDRIVE (Pin 19) | Digital I/O supply | Decouples logic interface voltage from AVDD; enables direct connection to 3 V or 5 V processor I/O rails |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables deterministic sampling instants critical for closed-loop control timing alignment |
| Configurable input range | 0 V to REFIN or 0 V to 2 × REFIN selected via RANGE bit - supports both unipolar and pseudo-bipolar sensor interfaces |
| Channel sequencer with shadow register | Allows two independent preprogrammed channel sequences - eliminates firmware overhead in periodic sensor polling |
| Auto shutdown mode | Reduces current to 650 μA typ at 200 kSPS - extends battery life in always-on vehicle subsystems |
| High channel-to-channel isolation | −82 dB at 400 kHz - prevents crosstalk between adjacent engine knock or cylinder pressure sensors |
| VDRIVE voltage independence | Permits 3 V logic interfacing while AVDD operates at 5 V - simplifies mixed-voltage system design |
Applications
| Engine Control Unit (ECU) | Brake-by-Wire Sensor Hub |
|---|---|
|
Use Scenario: Simultaneous acquisition of throttle position, manifold pressure, coolant temperature, and oxygen sensor signals in real time. IC Role / Device Role / Timing Role: 8-channel SAR ADC with hardware sequencer performs synchronized sampling across four critical engine parameters per cycle. Use Value: Eliminates need for multiple discrete ADCs or external multiplexer timing logic, reducing BOM count and PCB area in ASIL-B compliant modules. |
Use Scenario: Concurrent monitoring of dual redundant brake pressure transducers, pedal travel potentiometer, and master cylinder temperature. IC Role / Device Role / Timing Role: High-isolation ADC acquires safety-critical analog inputs with deterministic latency and no missed codes. Use Value: Meets ISO 26262 diagnostic coverage requirements via guaranteed monotonicity and channel isolation >80 dB. |
| Electric Power Steering (EPS) | Onboard Charger Monitoring |
|
Use Scenario: Sampling torque sensor, motor phase currents, and motor temperature in compact EPS control module. IC Role / Device Role / Timing Role: Low-power 12-bit ADC with auto shutdown delivers 200 kSPS throughput while maintaining <3.6 mW dissipation at 3 V. Use Value: Enables fanless, sealed enclosure design meeting IP67 and thermal derating constraints in steering column environments. |
Use Scenario: Monitoring AC input voltage/current, DC bus voltage, and heatsink temperature in bidirectional OBC systems. IC Role / Device Role / Timing Role: Automotive-qualified ADC interfaces to isolated amplifiers and references across multiple voltage domains via VDRIVE flexibility. Use Value: Supports single-chip acquisition across primary, secondary, and thermal domains without level-shifting circuitry or layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7928WYRUZ-REEL7 | 8-channel, 12-bit, but supports 1 MSPS throughput and wider 2.7 V to 5.25 V VDRIVE range; lacks automotive temp grade (only −40°C to +85°C B version available) | Targeted at industrial PLCs requiring higher speed, not automotive under-hood use | Select only if >200 kSPS is required and AEC-Q100 qualification is unnecessary |
| MAX11131ATI+T | 8-channel, 12-bit, 500 kSPS, SPI-compatible, but rated −40°C to +125°C and consumes 5.8 mW @ 3 V - no VDRIVE pin; I/O tied to AVDD | Used in commercial EV battery management where logic-voltage flexibility is not needed | Choose when higher speed justifies increased power and loss of independent logic rail support |
Compared with AD7927WYRUZ-REEL7, AD7928WYRUZ-REEL7 trades automotive qualification for speed, while MAX11131ATI+T sacrifices VDRIVE decoupling and efficiency for raw throughput - making AD7927WYRUZ-REEL7 optimal for thermally constrained, safety-critical automotive sensing where deterministic timing and mixed-voltage interfacing are essential.
Availability
AD7927WYRUZ-REEL7 is available at Aetrix Electronics and suitable for engine control units, brake-by-wire systems, and electric power steering modules requiring stable component supply across extended automotive lifecycles.
Supply support for AD7927WYRUZ-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, founded in 1965 and headquartered in Wilmington, MA.
The AD7927 belongs to Analog Devices' precision SAR ADC product line, designed specifically for automotive and industrial systems demanding high accuracy, low power, and robust operation across extreme temperature ranges.
FAQ
What is the maximum sampling rate supported by the AD7927WYRUZ-REEL7?
The AD7927WYRUZ-REEL7 supports a maximum throughput rate of 200 kSPS, achieved with a 20 MHz SCLK. Conversion time is fixed at 16 SCLK cycles, so the actual rate scales linearly with clock frequency - e.g., 10 MHz SCLK yields 100 kSPS. This rate is guaranteed across the full −40°C to +125°C automotive temperature range.
Does the AD7927WYRUZ-REEL7 require an external reference voltage?
Yes, the AD7927WYRUZ-REEL7 requires an external reference applied to the REFIN pin. For specified performance, REFIN must be 2.5 V ±1%, with typical impedance of 36 kΩ and leakage current ≤±1 μA. The device does not include an internal reference; using an inaccurate or noisy reference directly degrades INL, gain error, and SINAD performance.
How does the sequencer function work on the AD7927WYRUZ-REEL7?
The AD7927WYRUZ-REEL7 sequencer is configured via SEQ and SHADOW bits in the 12-bit control register. When SEQ=1 and SHADOW=1, it cycles through consecutive channels from VIN0 to the channel selected by ADD2–ADD0. When SEQ=0 and SHADOW=1, it loads a 16-bit shadow register to define two independent nonconsecutive channel sequences executed alternately - all without CPU intervention.
What is the purpose of the VDRIVE pin on the AD7927WYRUZ-REEL7?
The VDRIVE pin on the AD7927WYRUZ-REEL7 sets the voltage level for all digital I/O (SCLK, DIN, DOUT, CS), independent of AVDD. This allows direct interfacing to 3 V microcontrollers while AVDD runs at 5 V for analog performance, or vice versa - eliminating external level shifters and simplifying mixed-voltage board design in automotive ECUs.
Is the AD7927WYRUZ-REEL7 pin-compatible with other members of the AD792x family?
No, the AD7927WYRUZ-REEL7 is not pin-compatible with AD7923 or AD7924 due to differing channel counts and pin allocations (e.g., AD7923 has only 4 inputs and fewer VIN pins). However, it shares identical 20-lead TSSOP footprint and core serial interface behavior with AD7928, though AD7928 substitutes different power management timing and lacks W-grade temperature rating.
AD7927WYRUZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 8
- 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:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- -
AD7927WYRUZ-REEL7 FAQ
1.How can I place an order for AD7927WYRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7927WYRUZ-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 AD7927WYRUZ-REEL7 reliable?
The price and inventory of AD7927WYRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7927WYRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7927WYRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7927WYRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7927WYRUZ-REEL7?
AD7927WYRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7927WYRUZ-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 AD7927WYRUZ-REEL7?
For technical support, including AD7927WYRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7927WYRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7927WYRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7927WYRUZ-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 AD7927WYRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7927WYRUZ-REEL7?
All AD7927WYRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7927WYRUZ-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 AD7927WYRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7927WYRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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