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Analog Devices Inc. AD7918WYRUZ-REEL7
- Part No.:
- AD7918WYRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7918WYRUZ-REEL7.pdf
- Description:
- IC ADC 10BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:159
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Product details
Overview
AD7918WYRUZ-REEL7 from Analog Devices is a 10-bit, 1 MSPS, 8-channel successive approximation ADC with integrated channel sequencer and flexible input range selection (0 V to REFIN or 0 V to 2 × REFIN). It operates from a single 2.7 V to 5.25 V supply, consumes 6 mW max at 3 V/1 MSPS, and features SPI/QSPI/MICROWIRE/DSP-compatible serial interface for microprocessor interfacing in automotive sensor acquisition systems.
For engineers reviewing the AD7918WYRUZ-REEL7 datasheet, AD7918WYRUZ-REEL7 pinout, AD7918WYRUZ-REEL7 application, or AD7918WYRUZ-REEL7 equivalent, key selection considerations include guaranteed no-missed-codes performance to 10 bits, ±0.5 LSB INL, channel-to-channel isolation of −85 dB at 400 kHz, and automotive-qualified operation from −40°C to +125°C in 20-lead TSSOP.
Technical Context
The AD7918WYRUZ-REEL7 implements a track-and-hold amplifier with 8.2 MHz full-power bandwidth and 50 ps aperture jitter, enabling accurate sampling of high-frequency analog inputs up to 50 kHz while maintaining 61 dB minimum SINAD. Its conversion timing is fully synchronized to the external SCLK, requiring exactly 16 clock cycles per conversion with no pipeline delay.
Control logic uses CS falling edge to initiate sampling and conversion, while the 8-channel sequencer is programmable via a 3-bit address field and SEQ/SHADOW bits in the control register. The VDRIVE pin decouples serial interface voltage (2.7 V–5.25 V) from AVDD, allowing direct interfacing with 3 V or 5 V host processors independent of analog supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - guarantees monotonic output and no missing codes across full temperature range. |
| Throughput Rate | 1 MSPS - supports real-time sampling of fast transients in motor control or battery monitoring. |
| INL / DNL | ±0.5 LSB max / ±0.5 LSB max - ensures linearity critical for closed-loop feedback accuracy. |
| SINAD | 60.5 dB min at 50 kHz - enables >6-bit effective resolution for dynamic signal capture. |
| Power Dissipation | 6 mW max at 3 V/1 MSPS - reduces thermal load in space-constrained automotive ECUs. |
| Channel Isolation | −85 dB typ at 400 kHz - prevents crosstalk between adjacent sensor channels in multi-input systems. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100. |
Pinout & Package
AD7918WYRUZ-REEL7 is housed in a 20-lead TSSOP package (4.4 mm × 6.5 mm, 0.65 mm pitch), optimized for thermal performance (θJA = 143°C/W) and automotive PCB reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Master clock source for both data transfer and internal conversion timing; supports up to 20 MHz operation. |
| DIN | Control register data input | Accepts configuration bits (RANGE, CODING, SEQ, ADD[2:0]) on SCLK falling edge for sequencer setup. |
| CS | Chip select / conversion trigger | Falling edge initiates sampling and conversion; frames serial data transactions with DOUT. |
| AGND (Pins 4,8,17,20) | Analog ground reference | Common return for all analog signals (VIN0–VIN7, REFIN, AVDD); must be isolated from digital ground. |
| VIN0–VIN7 | Single-ended analog inputs | Eight dedicated channels multiplexed into internal T/H; unused pins must be tied to AGND to prevent noise coupling. |
| DOUT | Serial data output | MSB-first stream: 1 leading zero + 3 address bits + 10 data bits + 2 trailing zeros; compatible with standard SPI modes. |
| REFIN | External reference input | Accepts 2.5 V ±1% reference; sets full-scale range for both 0–REFIN and 0–2×REFIN modes. |
| VDRIVE | Digital I/O supply | Defines logic thresholds (0.3×/0.7×VDRIVE); enables mixed-voltage interfacing without level shifters. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Sampling instant precisely controlled by CS falling edge; eliminates latency uncertainty in time-critical control loops. |
| Programmable input range | Select 0 V to REFIN (straight binary) or 0 V to 2 × REFIN (twos complement) via RANGE bit-supports bipolar signal conditioning without external op amps. |
| Automotive qualification | AEC-Q100 Grade 1 compliant with extended temperature range (−40°C to +125°C) and robust ESD protection (1.5 kV HBM). |
| Low-power shutdown | 0.5 μA max current in full shutdown mode-enables energy-efficient wake-on-event architectures in always-on vehicle subsystems. |
| VDRIVE voltage independence | Serial interface operates at 3 V or 5 V regardless of AVDD, simplifying integration with diverse host processor families. |
Applications
| Engine Control Unit (ECU) Sensor Hub | Electric Power Steering (EPS) Feedback Acquisition |
|---|---|
Use Scenario: Simultaneous sampling of throttle position, manifold pressure, coolant temperature, and knock sensor outputs in gasoline engine management. IC Role / Device Role / Timing Role: 8-channel sequencer performs round-robin conversion of analog sensor signals at 100 kSPS per channel, synchronized to engine crankshaft position timer. Use Value: Guaranteed no-missed-codes 10-bit resolution and −85 dB channel isolation ensure accurate air-fuel ratio calculation and misfire detection without inter-channel interference. | Use Scenario: Real-time acquisition of torque sensor, motor phase currents, and temperature sensors in brushless DC motor control loop. IC Role / Device Role / Timing Role: ADC provides synchronized 10-bit samples to MCU's PWM generator with <1 µs total latency (CS-to-data-valid), enabling sub-10 µs current regulation cycles. Use Value: 1 MSPS throughput and 50 ps aperture jitter preserve signal integrity of fast-rising current waveforms, improving torque ripple suppression by >3 dB. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Onboard Charger (OBC) Battery Management Interface |
Use Scenario: Monitoring lens focus motor position, IR LED driver current, and ambient light sensor in surround-view camera ECU. IC Role / Device Role / Timing Role: Configured for auto-sequencing across VIN0–VIN3 to scan four analog telemetry points every 500 µs during active imaging mode. Use Value: VDRIVE pin allows direct connection to 3.3 V camera SoC I/O rails while AVDD runs at 5 V for optimal SNR-eliminates level-shifter BOM cost and layout area. | Use Scenario: Sampling cell voltage, pack current shunt, and thermistor network in 400 V EV onboard charger during charging cycles. IC Role / Device Role / Timing Role: Operates in 0 V to 2 × REFIN mode with twos complement coding to digitize ±2.5 V differential signals from isolated amplifiers without polarity inversion. Use Value: ±0.5 LSB gain error match across channels ensures consistent SOC estimation across 12-cell stacks, reducing state-of-charge drift to <0.3% over 1000 cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7918BRUZ | Same die, 20-lead TSSOP, but commercial-grade (−40°C to +85°C) and non-automotive qualified. | Lacks AEC-Q100 certification and extended temperature support; unsuitable for under-hood deployment. | Select AD7918BRUZ only for cost-sensitive industrial or consumer designs where automotive qualification is unnecessary. |
| ADS7953IRHBT | Texas Instruments 12-bit, 1 MSPS, 16-channel SAR ADC with integrated reference and GPIOs; consumes 11 mW at 5 V/1 MSPS. | Higher resolution but larger 32-pin QFN package; lacks VDRIVE flexibility and automotive qualification. | Choose ADS7953IRHBT when 12-bit precision and extra channels outweigh need for AEC-Q100 compliance and mixed-voltage I/O. |
Compared with AD7918BRUZ, AD7918WYRUZ-REEL7 adds automotive qualification and extended temperature operation without sacrificing speed or power; versus ADS7953IRHBT, it offers superior I/O voltage flexibility and smaller footprint at the expense of channel count and resolution.
Availability
AD7918WYRUZ-REEL7 is available at Aetrix Electronics and suitable for automotive sensor acquisition, electric power steering feedback, ADAS camera telemetry, and onboard charger battery management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7918WYRUZ-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 AD7908/AD7918/AD7928 family was designed specifically for high-speed, low-power, multichannel data acquisition in automotive and industrial environments where precision, reliability, and temperature resilience are critical.
FAQ
What is the maximum sample rate supported by the AD7918WYRUZ-REEL7?
The AD7918WYRUZ-REEL7 supports a maximum throughput rate of 1 MSPS, achieved with a 20 MHz SCLK and 16 clock cycles per conversion. This rate is maintained across its full operating temperature range (−40°C to +125°C) and supply voltage range (2.7 V to 5.25 V), with no pipeline delay affecting timing predictability in the AD7918WYRUZ-REEL7.
Does the AD7918WYRUZ-REEL7 require an external reference voltage?
Yes, the AD7918WYRUZ-REEL7 requires an external reference applied to the REFIN pin. For specified performance, this must be a stable 2.5 V ±1% reference. The device supports two input ranges-0 V to REFIN and 0 V to 2 × REFIN-both dependent on this externally supplied voltage, making reference stability critical to accuracy in the AD7918WYRUZ-REEL7.
How does the channel sequencer function in the AD7918WYRUZ-REEL7?
The AD7918WYRUZ-REEL7 sequencer is programmed via the control register's SEQ and ADD[2:0] bits to define a preselected order of channels (VIN0–VIN7) that are converted sequentially upon each CS assertion. Once enabled, the sequencer automatically cycles through the defined set without host intervention, reducing software overhead and ensuring deterministic timing in the AD7918WYRUZ-REEL7.
Is the AD7918WYRUZ-REEL7 compatible with standard SPI interfaces?
Yes, the AD7918WYRUZ-REEL7 features a SPI/QSPI/MICROWIRE/DSP-compatible serial interface with CS, SCLK, DIN, and DOUT signals. It operates in standard SPI Mode 0 (CPOL = 0, CPHA = 0), accepts data on SCLK falling edges, and outputs MSB-first with configurable leading/trailing bits-ensuring drop-in compatibility with most microcontrollers' hardware SPI peripherals in the AD7918WYRUZ-REEL7.
What packaging and reel specifications apply to the AD7918WYRUZ-REEL7?
The AD7918WYRUZ-REEL7 is supplied in a 20-lead TSSOP package (ROHS-compliant, Pb-free) on a 7-inch reel with 2500 units per reel (REEL7 suffix). The package dimensions are 4.4 mm × 6.5 mm × 1.1 mm, with 0.65 mm lead pitch and exposed pad not present-optimized for automated placement and reflow in automotive-grade manufacturing for the AD7918WYRUZ-REEL7.
AD7918WYRUZ-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:
- 10
- Sampling Rate (Per Second):
- 1M
- 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:
- -
AD7918WYRUZ-REEL7 FAQ
1.How can I place an order for AD7918WYRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7918WYRUZ-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 AD7918WYRUZ-REEL7 reliable?
The price and inventory of AD7918WYRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7918WYRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7918WYRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7918WYRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7918WYRUZ-REEL7?
AD7918WYRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7918WYRUZ-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 AD7918WYRUZ-REEL7?
For technical support, including AD7918WYRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7918WYRUZ-REEL7 requirements.
6.How does Aetrix verify that AD7918WYRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7918WYRUZ-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 AD7918WYRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7918WYRUZ-REEL7?
All AD7918WYRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7918WYRUZ-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 AD7918WYRUZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7918WYRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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