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Analog Devices Inc. AD4697BCBZ-RL7
- Part No.:
- AD4697BCBZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 36-UFBGA, WLCSP
- Datasheet:
-
AD4697BCBZ-RL7.pdf
- Description:
- 8 CH, 16 BIT 500 KSPS SAR ADC
- Quantity:
- Payment:
- Shipping:
Inventory:268
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Product details
Overview
AD4697BCBZ-RL7 from Analog Devices is a 16-bit, 8-channel, 500 kSPS multiplexed SAR ADC with Easy Drive architecture, on-chip oversampling, threshold detection, and autonomous conversion mode. It features ±1 LSB INL, 93 dB SINAD at 1 kHz, −40°C to +125°C operation, and 24-lead 4.00 mm × 4.00 mm LFCSP packaging - optimized for photodiode monitoring and battery-powered precision data acquisition.
For engineers reviewing the AD4697BCBZ-RL7 datasheet, AD4697BCBZ-RL7 pinout, AD4697BCBZ-RL7 application, or AD4697BCBZ-RL7 equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance, analog input high-Z mode for simplified AFE design, reference input high-Z mode, 5 mA overvoltage protection per channel, and autocycle mode for low-power interrupt-driven firmware.
Technical Context
The AD4697BCBZ-RL7 integrates an 8-channel low-crosstalk multiplexer with configurable sequencer, true 16-bit SAR core, and on-chip oversampling/decimation (OSR up to 64). Its Easy Drive architecture enables analog input and reference high-Z modes, eliminating need for external drivers and buffers in most designs.
It supports unipolar and pseudobipolar input modes, includes per-channel overvoltage clamp circuits (activation at VREF + 0.55 V), internal temperature sensor (680 mV at 25°C, −1.8 mV/°C), and dual-/quad-SDO SPI interface with 1.14–1.98 V logic compatibility. Autocycle mode provides programmable sample periods from 8.5 μs to 920 μs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no missing codes - ensures full dynamic range utilization without code gaps in precision measurement. |
| Sample Rate | 500 kSPS - supports high-speed multichannel sampling while maintaining DC accuracy and noise performance. |
| INL | ±1 LSB max - enables accurate absolute voltage measurement without calibration in industrial and medical applications. |
| SINAD | 93 dB typical at fIN = 1 kHz - delivers >15.2 ENOB for high-fidelity signal capture in instrumentation-grade systems. |
| Oversampled DR | 111.2 dB at OSR = 64 - reduces effective input-referred noise to 4.9 µV rms for low-level sensor signal resolution. |
| Power Dissipation | 8 mW at 1 MSPS (AD4698) / 4 mW at 500 kSPS (AD4697) - enables thermally constrained, battery-operated deployments. |
| Operating Temp | −40°C to +125°C - qualified for automotive under-hood, industrial control, and harsh-environment monitoring. |
Pinout & Package
AD4697BCBZ-RL7 is housed in a 24-lead, 4.00 mm × 4.00 mm lead frame chip scale package (LFCSP) with exposed thermal pad. Pin functions are defined per Analog Devices' Rev. B datasheet, Figure 13 (Pin Configuration and Function Descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0–IN7 | Analog Input Channels | Eight differential-capable inputs routed through internal low-crosstalk mux; each includes 5 mA overvoltage clamp. |
| COM | Common Input Reference | Shared reference node for pseudobipolar mode; supports single-ended or differential configurations. |
| REF | Reference Voltage Input | Accepts 2.4 V to 5.1 V external reference; high-Z mode reduces drive burden on reference source. |
| AVDD | Analog Power Supply | 2.7 V to 5.5 V single supply; powers ADC core, mux, and reference buffer (if enabled). |
| VIO | I/O Logic Supply | 1.14 V to 1.98 V - enables direct interfacing with ultra-low-voltage microcontrollers and FPGAs. |
| CS, SCK, SDI, SDOx | SPI Interface | Supports dual-/quad-SDO for reduced SCK frequency; compatible with 1.8 V logic families. |
| CNV | Conversion Start | Edge-triggered command; initiates acquisition and conversion cycle with 380 ns conversion time. |
| Busy | Status Indicator | Active-high open-drain output signals conversion completion; usable as interrupt to host processor. |
Key Features
| Feature | Design Value |
|---|---|
| Analog Input High-Z Mode | Reduces input drive requirements by >95%, enabling direct connection to high-impedance sensors (e.g., photodiodes) without external op-amp buffers. |
| On-Chip Oversampling & Decimation | Configurable OSR up to 64 improves SNR by 17.8 dB and reduces effective input noise to 4.9 µV rms - eliminates need for external digital filtering. |
| Autonomous Conversion (Autocycle) | Programmable sample period (8.5–920 µs) with automatic sequencing and threshold-triggered alerts - enables ultra-low-power wake-on-event operation. |
| Per-Channel Overvoltage Protection | Clamps at VREF + 0.55 V with 5 mA current limit; prevents fault propagation between channels and protects downstream circuitry. |
| Flexible Channel Sequencer | Customizable scan order and enable/disable per channel via register configuration - simplifies firmware for mixed-signal monitoring tasks. |
Applications
| Photodiode Monitoring | Medical Instrumentation |
|---|---|
Use Scenario: Simultaneous readout of multiple photodiode arrays in portable pulse oximeters or spectroscopy modules. IC Role / Device Role / Timing Role: 8-channel precision ADC digitizes low-current, high-impedance photodiode outputs with minimal external components. Use Value: Analog input high-Z mode eliminates transimpedance amplifier buffering per channel, reducing BOM count and board area by >30%. | Use Scenario: Vital signs monitoring in wearable ECG/EMG devices requiring long battery life and clinical-grade accuracy. IC Role / Device Role / Timing Role: SAR ADC performs synchronized multichannel acquisition with autocycle mode triggering on physiological thresholds. Use Value: 4 µW standby power (LDO disabled) and interrupt-driven conversion extend battery runtime beyond 7 days on coin-cell power. |
| Electronic Test Equipment | Battery-Powered Data Loggers |
Use Scenario: Modular benchtop DMM or parameter analyzer requiring stable 16-bit DC accuracy across temperature. IC Role / Device Role / Timing Role: Precision ADC core with ±1 LSB INL and −40°C to +125°C spec ensures traceable metrology-grade measurements. Use Value: On-chip offset/gain correction registers enable one-time factory calibration, removing need for per-unit trimming hardware. | Use Scenario: Remote environmental sensor nodes measuring temperature, pressure, and gas concentration over multi-year deployments. IC Role / Device Role / Timing Role: Low-power ADC interfaces to MEMS and electrochemical sensors while supporting deep-sleep wake-up on alarm conditions. Use Value: Threshold detection alerts and autonomous conversion reduce host MCU active time by >90%, cutting system-level power by 4.2× vs. polled architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD4698BCBZ-RL7 | 1 MSPS sample rate (vs. 500 kSPS); identical pinout, package, and feature set. | Required where higher throughput is needed for real-time control loops or faster sensor polling. | Select AD4698BCBZ-RL7 only when system timing budget demands >500 kSPS per channel; otherwise AD4697BCBZ-RL7 offers same accuracy at lower power. |
| ADS8688IPWR | 8-channel, 16-bit, 500 kSPS SAR ADC with integrated PGA and reference; 38-pin TSSOP package. | Preferred when programmable gain amplification is required before digitization, or when larger PCB footprint is acceptable. | ADS8688IPWR adds PGA flexibility but consumes 2× more power and lacks Easy Drive input high-Z mode - use only if gain scaling is mandatory. |
Compared with AD4698BCBZ-RL7, the AD4697BCBZ-RL7 trades 2× sample rate for 2× lower conversion power (4 mW vs. 8 mW), while matching all accuracy, noise, and feature specifications. Against ADS8688IPWR, it delivers superior input drive simplification and smaller footprint but requires external signal conditioning for gain adjustment.
Availability
AD4697BCBZ-RL7 is available at Aetrix Electronics and suitable for photodiode monitoring, medical instrumentation, and battery-powered equipment requiring stable component supply, long-term lifecycle support, and guaranteed 16-bit precision across extended temperature ranges.
Supply support for AD4697BCBZ-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD4697/AD4698 product line was designed specifically for space-constrained, multichannel precision data acquisition systems - emphasizing Easy Drive architecture to minimize external component count while delivering guaranteed 16-bit accuracy and robust overvoltage protection.
FAQ
What is the maximum sample rate supported by the AD4697BCBZ-RL7?
The AD4697BCBZ-RL7 supports a maximum sample rate of 500 kSPS in standard conversion mode. This is fixed for the AD4697 variant; the pin-compatible AD4698BCBZ-RL7 offers 1 MSPS. Both share identical resolution, accuracy, and feature set except for throughput - making AD4697BCBZ-RL7 optimal for power- or cost-sensitive applications where 500 kSPS suffices.
Does the AD4697BCBZ-RL7 include an internal reference buffer?
No, the AD4697BCBZ-RL7 does not include an internal reference buffer. That feature is exclusive to the WLCSP variants (e.g., AD4697WBCBZ-RL7). The AD4697BCBZ-RL7 uses the LFCSP package and relies on external reference buffering or high-Z mode operation with a low-output-impedance reference source. Reference input leakage remains ≤165 nA under normal conditions.
How does the Easy Drive architecture of the AD4697BCBZ-RL7 reduce system design complexity?
The Easy Drive architecture in the AD4697BCBZ-RL7 implements analog input high-Z mode and reference input high-Z mode, which reduce required drive strength by >95% compared to conventional SAR ADCs. This allows direct connection of high-impedance sensors (e.g., photodiodes) and eliminates external op-amp buffers and reference buffers in most designs - cutting BOM cost, PCB area, and layout sensitivity while improving channel density.
Can the AD4697BCBZ-RL7 operate from a single 3.3 V supply?
Yes, the AD4697BCBZ-RL7 supports single-supply operation with AVDD = 3.3 V (within 2.7 V–5.5 V range), VIO = 1.8 V (within 1.14 V–1.98 V), and LDO_IN tied to AGND (disabling internal LDO). It also accepts 2.4 V–5.1 V on REF. All specifications - including ±1 LSB INL and 93 dB SINAD - are guaranteed across this configuration at −40°C to +125°C.
What is the purpose of the autocycle mode in the AD4697BCBZ-RL7?
The autocycle mode in the AD4697BCBZ-RL7 enables fully autonomous, low-power multichannel conversions without host processor intervention. It supports eight programmable sample periods (8.5 µs to 920 µs), automatic channel sequencing, and threshold-triggered alert generation. This mode reduces system-level power by allowing the host MCU to remain in deep sleep until an event-based interrupt occurs - critical for battery-powered sensor nodes and wearables.
AD4697BCBZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- 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:
- 36-WLCSP (2.96x2.96)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD4697BCBZ-RL7 FAQ
1.How can I place an order for AD4697BCBZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4697BCBZ-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 AD4697BCBZ-RL7 reliable?
The price and inventory of AD4697BCBZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4697BCBZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD4697BCBZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4697BCBZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4697BCBZ-RL7?
AD4697BCBZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4697BCBZ-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 AD4697BCBZ-RL7?
For technical support, including AD4697BCBZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4697BCBZ-RL7 requirements.
6.How does Aetrix verify that AD4697BCBZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD4697BCBZ-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 AD4697BCBZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD4697BCBZ-RL7?
All AD4697BCBZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD4697BCBZ-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 AD4697BCBZ-RL7 part is unused and in its original packaging.
Return procedure for AD4697BCBZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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