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Analog Devices Inc. AD4698BCPZ-RL7
- Part No.:
- AD4698BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD4698BCPZ-RL7.pdf
- Description:
- 8 CH, 16 BIT 1 MSPS SAR ADC
- Quantity:
- Payment:
- Shipping:
Inventory:3,955
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Product details
Overview
AD4698BCPZ-RL7 from Analog Devices is a 16-bit, 8-channel, 1 MSPS multiplexed SAR ADC with Easy Drive architecture, on-chip oversampling (OSR = 64), ±1 LSB INL, and 93 dB SINAD at 1 kHz. It operates from −40°C to +125°C and supports unipolar/pseudobipolar input modes for precision photodiode monitoring and medical instrumentation.
For engineers reviewing the AD4698BCPZ-RL7 datasheet, AD4698BCPZ-RL7 pinout, AD4698BCPZ-RL7 application, or AD4698BCPZ-RL7 equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance, low 8 mW power at 1 MSPS, integrated overvoltage protection (±5 mA per channel), and autonomous autocycle mode for interrupt-driven firmware in battery-powered systems.
Technical Context
The AD4698BCPZ-RL7 implements a true 16-bit SAR core with 8-channel low-crosstalk multiplexer and flexible channel sequencer. Its Easy Drive architecture enables analog input high-Z mode and reference input high-Z mode, eliminating need for external high-speed drivers and reducing AFE component count.
Digital functionality includes on-chip oversampling/decimation (up to OSR = 64), threshold detection with alert indicators, offset/gain correction registers, and autocycle mode with programmable sample periods (8.5–920 μs). It supports dual-/quad-SDO SPI interface with 1.14 V to 1.98 V logic voltage and first-conversion accuracy without pipeline latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no missing codes - ensures full dynamic range utilization in precision measurement. |
| Sample Rate | 1 MSPS - enables real-time capture of fast transients in automated test equipment. |
| INL | ±1 LSB max - maintains linearity critical for calibration-sensitive medical instrumentation. |
| SINAD | 93 dB typical at fIN = 1 kHz - delivers high-fidelity signal fidelity for vital signs monitoring. |
| Oversampled DR | 111.2 dB at OSR = 64 - suppresses quantization noise for low-level sensor signals like photodiodes. |
| Power Dissipation | 8 mW at 1 MSPS - supports thermally constrained, space-limited industrial embedded designs. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial process control environments. |
Pinout & Package
AD4698BCPZ-RL7 is housed in a 24-lead, 4.00 mm × 4.00 mm LFCSP package with exposed paddle for thermal management. Pin functions are validated per Analog Devices' Rev. B datasheet (pages 13–15).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVDD | Analog supply input | 2.7 V to 5.5 V single supply; powers ADC core and multiplexer. |
| VIO | Digital I/O supply | 1.14 V to 1.98 V logic interface; decouples digital noise from analog domain. |
| REF | Reference input | 2.4 V to 5.1 V external reference; high-Z mode reduces drive burden on reference circuitry. |
| IN0–IN7 | Analog input channels | 8 multiplexed inputs with ±5 mA overvoltage clamp; prevents cross-channel degradation. |
| COM | Common-mode reference | Supports pseudobipolar mode; sets common-mode level for differential input configuration. |
| CNV | Conversion start | Edge-triggered command; initiates acquisition phase with ≥715 ns acquisition time at 1 MSPS. |
| SDO0–SDO3 | Serial data outputs | Quad-SDO mode enables low SPI clock rates (≥12.5 ns period) for resource-constrained microcontrollers. |
| CSB | Chip select | Active-low SPI enable; supports daisy-chain configurations in multi-ADC systems. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive analog input high-Z mode | Reduces required AFE drive strength by >90%, enabling direct connection to high-impedance sensors like photodiodes without op-amp buffers. |
| On-chip oversampling (OSR = 64) | Improves effective resolution to >18 bits and reduces input-referred noise to 4.9 µV rms for low-amplitude signal acquisition. |
| Autocycle mode with programmable timing | Enables fully autonomous conversions at intervals from 8.5 µs to 920 µs, minimizing host MCU intervention in battery-powered monitoring. |
| Per-channel overvoltage protection clamps | Limit fault current to ≤5 mA per input while isolating faults-prevents performance degradation on unaffected channels during transient events. |
| Threshold detection with alert indicators | Generates hardware interrupts when channel readings exceed user-defined limits, supporting responsive closed-loop control in instrumentation. |
Applications
| Photodiode Monitoring | Medical Instrumentation |
|---|---|
Use Scenario: High-precision current-to-voltage conversion from low-light photodiode arrays in portable spectrometers. IC Role / Device Role / Timing Role: 16-bit SAR ADC digitizing sub-nA photocurrents with 111.2 dB oversampled DR and 93 dB SINAD. Use Value: Enables detection of weak optical signals without external amplification, reducing system noise floor and board area. | Use Scenario: Multi-parameter physiological signal acquisition (ECG, SpO₂, temperature) in wearable patient monitors. IC Role / Device Role / Timing Role: 8-channel simultaneous-sampling-capable ADC with autocycle mode and threshold alerts for real-time anomaly detection. Use Value: Reduces host MCU wake-up frequency and power consumption while maintaining clinical-grade accuracy across −40°C to +125°C. |
| Vital Signs Monitoring | Battery-Powered Equipment |
Use Scenario: Continuous non-invasive blood pressure and respiration rate tracking using piezoresistive and capacitive sensors. IC Role / Device Role / Timing Role: Precision ADC with programmable acquisition timing (715 ns min), low 8 mW active power, and 4 µW standby dissipation. Use Value: Extends battery life in Class II medical devices while meeting IEC 60601-1 EMC immunity requirements via reduced digital switching activity. | Use Scenario: Portable gas analyzers requiring long field operation on Li-ion cells with minimal thermal rise. IC Role / Device Role / Timing Role: Low-power 16-bit ADC with internal LDO support (2.7 V–5.5 V AVDD), 1.14 V–1.98 V VIO logic, and −40°C to +125°C operation. Use Value: Eliminates need for external DC-DC converters and level shifters, simplifying power architecture and improving reliability in harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD4697BCPZ-RL7 | 500 kSPS max sample rate; identical pinout, package, and feature set except lower throughput. | Suitable for lower-bandwidth applications like slow-process temperature logging where 1 MSPS is unnecessary. | Select AD4697BCPZ-RL7 only if system sampling requirement is ≤500 kSPS-reduces power by ~50% at same OSR. |
| ADS8688IPWR | 8-channel, 16-bit SAR ADC with integrated PGA (±10.24 V range); no on-chip oversampling or autocycle mode; 500 kSPS max. | Better suited for industrial PLC analog input modules requiring wide input voltage ranges and built-in gain, but lacks Easy Drive and low-power autonomy. | Choose ADS8688IPWR when front-end signal conditioning (gain/attenuation) is required before digitization; not drop-in compatible due to different register map and timing. |
Compared with AD4697BCPZ-RL7, the AD4698BCPZ-RL7 delivers double the sample rate (1 MSPS vs. 500 kSPS) with identical power efficiency and feature set-making it optimal for time-critical medical waveforms. Versus ADS8688IPWR, AD4698BCPZ-RL7 offers superior noise performance (111.2 dB vs. ~95 dB DR) and autonomous operation but requires external signal conditioning for wide-range inputs.
Availability
AD4698BCPZ-RL7 is available at Aetrix Electronics and suitable for photodiode monitoring, medical instrumentation, and battery-powered equipment requiring stable component supply, extended temperature qualification, and long-term production continuity.
Supply support for AD4698BCPZ-RL7 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 Wilmington, MA.
The AD4697/AD4698 product line was designed specifically for space-constrained, multichannel precision data acquisition systems-emphasizing low power, high channel density, and simplified analog front-end design through Easy Drive architecture.
FAQ
What is the maximum sample rate supported by the AD4698BCPZ-RL7?
The AD4698BCPZ-RL7 supports a maximum sample rate of 1 MSPS in standard conversion mode. This is confirmed in the Rev. B datasheet Table 1 under "Sampling Dynamics" and distinguishes it from the AD4697BCPZ-RL7 (500 kSPS). The 1 MSPS rate is achievable with ≥715 ns acquisition time and full 16-bit accuracy, making AD4698BCPZ-RL7 suitable for high-speed sensor monitoring applications such as ECG waveform capture.
Does the AD4698BCPZ-RL7 include an internal reference buffer?
No, the AD4698BCPZ-RL7 does not include an internal reference buffer. Per the Rev. B datasheet footnote 7 (page 7), the REFIN pin and internal reference buffer are exclusive to the WLCSP variant (e.g., AD4698WBCPZ-RL7). The AD4698BCPZ-RL7 uses the LFCSP package and relies on external reference buffering; its REF pin accepts 2.4 V to 5.1 V with 165 nA leakage current and supports high-Z mode to reduce drive requirements.
What overvoltage protection capability does the AD4698BCPZ-RL7 provide on its analog inputs?
The AD4698BCPZ-RL7 provides per-channel overvoltage protection clamps rated for up to 5 mA fault current, with activation at VREF + 0.55 V and deactivation at VREF + 0.1 V. As specified in Table 1 (page 7), this protects against transient overvoltages without degrading performance on other channels-a key advantage in multichannel systems like industrial sensor arrays where one input may experience ESD or wiring faults.
Can the AD4698BCPZ-RL7 operate autonomously without host processor intervention?
Yes, the AD4698BCPZ-RL7 supports autonomous operation via its autocycle mode, which allows fully self-timed conversions at programmable intervals (8.5 µs to 920 µs) without external CNV pulses. As detailed in the "Autocycle Mode" section (pages 63–65), this feature generates status and alert interrupts, enabling low-power, interrupt-driven firmware architectures-ideal for battery-powered applications where the host MCU can remain in deep sleep between valid data events.
What is the guaranteed integral nonlinearity (INL) specification for the AD4698BCPZ-RL7?
The AD4698BCPZ-RL7 guarantees ±1 LSB maximum integral nonlinearity (INL) over the full operating temperature range of −40°C to +125°C in the LFCSP package, as stated in Table 1 (page 5) under "DC Accuracy." This specification applies with oversampling ratio (OSR) = 1 and ensures monotonicity and precise end-point accuracy essential for calibration-critical applications such as medical diagnostic equipment and precision test instrumentation.
AD4698BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 1.71V ~ 1.89V, 3.15V ~ 5.5V
- Voltage - Supply, Digital:
- 1.71V ~ 1.89V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 24-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD4698BCPZ-RL7 FAQ
1.How can I place an order for AD4698BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4698BCPZ-RL7 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 AD4698BCPZ-RL7 reliable?
The price and inventory of AD4698BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4698BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD4698BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4698BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4698BCPZ-RL7?
AD4698BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4698BCPZ-RL7 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 AD4698BCPZ-RL7?
For technical support, including AD4698BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4698BCPZ-RL7 requirements.
6.How does Aetrix verify that AD4698BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD4698BCPZ-RL7 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 AD4698BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD4698BCPZ-RL7?
All AD4698BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD4698BCPZ-RL7, 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 AD4698BCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD4698BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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