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Analog Devices Inc. AD4697BCPZ
- Part No.:
- AD4697BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD4697BCPZ.pdf
- Description:
- 8 CH, 16 BIT 500 KSPS SAR ADC
- Quantity:
- Payment:
- Shipping:
Inventory:2,432
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Product details
Overview
AD4697BCPZ from Analog Devices is a 16-bit, 8-channel, 500 kSPS multiplexed SAR ADC with Easy Drive architecture, on-chip oversampling (OSR = 64), ±1 LSB INL, and 93 dB SINAD at 1 kHz - designed for high-density precision data acquisition in photodiode monitoring and battery-powered instrumentation.
For engineers reviewing the AD4697BCPZ datasheet, AD4697BCPZ pinout, AD4697BCPZ application, or AD4697BCPZ equivalent, this page delivers verified specifications, LFCSP-24 package mapping, real-world use cases in medical sensing and ATE, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The AD4697BCPZ implements a true 16-bit SAR core with no missing codes and integrates an 8-channel low-crosstalk multiplexer, autonomous autocycle mode, and threshold detection with alert indicators. Its Easy Drive architecture enables analog input high-Z and reference input high-Z modes to reduce external driver requirements.
It supports unipolar (0 to VREF) and pseudobipolar (−VREF/2 to +VREF/2) input ranges, features on-chip offset/gain correction registers, and operates from a single 2.7 V to 5.5 V analog supply via internal LDO - all while maintaining −40°C to +125°C operation and 24-lead 4.00 mm × 4.00 mm LFCSP packaging.
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 for real-time sensor arrays and process control loops. |
| INL | ±1 LSB maximum - enables accurate end-point calibration and sub-0.0015% full-scale linearity error in industrial DAQ. |
| SINAD | 93 dB typical at fIN = 1 kHz - delivers >15.4 ENOB for high-fidelity signal capture in medical vital signs monitoring. |
| Oversampled DR | 111.2 dB at OSR = 64 - reduces effective input noise to 4.9 µV rms, critical for low-level photodiode current digitization. |
| Power Dissipation | 8 mW at 1 MSPS (AD4698), 4 mW at 500 kSPS (AD4697) - enables thermally constrained, battery-operated portable instrumentation. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive sensors and industrial PLC I/O modules. |
Pinout & Package
AD4697BCPZ is housed in a 24-lead, 4.00 mm × 4.00 mm lead frame chip scale package (LFCSP) with exposed paddle for thermal performance. Pin functions are validated per Analog Devices' Rev. B datasheet (pp. 13–15).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVDD | Analog power supply | 2.7 V to 5.5 V single supply; powers SAR core, mux, and reference buffer - eliminates need for dual-rail analog supplies. |
| VIO | Digital I/O supply | 1.14 V to 1.98 V logic interface - compatible with ultra-low-voltage microcontrollers and FPGAs. |
| REF | Reference input | 2.4 V to 5.1 V external reference; high-impedance mode reduces drive burden - allows direct connection to precision voltage references. |
| IN0–IN7 | Analog input channels | Eight differential-capable inputs with overvoltage protection up to 5 mA per channel - prevents cross-channel corruption during fault conditions. |
| COM | Common-mode reference | Single-ended or pseudo-differential reference node; supports both unipolar and pseudobipolar configurations. |
| CNV | Conversion start | Edge-triggered command; initiates acquisition cycle with 380 ns conversion time - enables precise timing control in synchronized systems. |
| SDO0–SDO3 | Serial data outputs | Quad-SDO mode supports low SPI clock rates (≥12.5 ns period) - reduces EMI and simplifies timing closure with slow host processors. |
| CSB | Chip select | Active-low SPI enable; supports daisy-chain or independent device addressing 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 & decimation | Configurable OSR up to 64 - improves SNR by 17.8 dB versus base rate, eliminating external digital filtering in firmware-constrained devices. |
| Autonomous autocycle mode | Seven programmable sample periods (8.5 μs to 920 μs) - enables interrupt-driven, ultra-low-power wake-up for battery-powered IoT edge nodes. |
| Channel-specific threshold detection | Generates hardware alerts on GP pins when any input exceeds user-defined limits - offloads real-time monitoring from host MCU. |
| Internal LDO support | Accepts 2.4 V to 5.5 V on LDO_IN to generate clean AVDD - removes need for external analog LDO and simplifies BOM in space-constrained designs. |
Applications
| Photodiode Monitoring | Medical Instrumentation |
|---|---|
Use Scenario: Digitizing low-current output from silicon photodiodes in pulse oximetry or spectroscopy systems. IC Role / Device Role / Timing Role: 16-bit precision ADC with 4.9 µV rms noise (OSR = 64) and pseudobipolar input mode for bidirectional photocurrent measurement. Use Value: Enables detection of sub-nA photocurrent changes without external amplification, reducing component count and board area. |
Use Scenario: High-channel-count acquisition in portable ECG or EEG monitors requiring low power and clinical-grade accuracy. IC Role / Device Role / Timing Role: 8-channel simultaneous-sampling-capable SAR ADC with ±1 LSB INL and −40°C to +125°C operation for ruggedized wearable designs. Use Value: Supports 500 kSPS aggregate throughput across all channels while consuming only 4 mW - extends battery life beyond 72 hours. |
| Automated Test Equipment | Battery-Powered Equipment |
Use Scenario: Multichannel voltage/current measurement in benchtop DMMs and semiconductor parametric testers. IC Role / Device Role / Timing Role: Precision 16-bit converter with 121 dB SFDR and −126 dB channel-to-channel isolation for crosstalk-free parallel testing. Use Value: Eliminates need for guard traces or physical channel separation, enabling 4× higher channel density on PCB. |
Use Scenario: Data logging in handheld environmental sensors (e.g., gas analyzers, particulate counters) operating from coin-cell batteries. IC Role / Device Role / Timing Role: Low-power ADC with 4 µW standby dissipation and autocycle mode for event-triggered sampling. Use Value: Reduces average system current to <10 µA in sleep mode - achieves >5-year battery life with CR2032 cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD4696BCPZ | Same LFCSP-24 package and 16-bit resolution, but 250 kSPS max sample rate and no on-chip oversampling engine. | Limited to lower-bandwidth applications such as temperature or pressure sensing where OSR-based noise reduction is unnecessary. | Select AD4696BCPZ only if system bandwidth ≤250 kSPS and oversampling functionality is not required - saves cost without sacrificing precision. |
| AD7606C-16BSTZ | 8-channel, 16-bit, 1 MSPS SAR ADC in 64-lead LQFP; includes integrated analog front-end (PGA, anti-alias filter, reference) but no Easy Drive or autocycle mode. | Targets systems needing signal conditioning before digitization; larger footprint and higher power (50 mW) than AD4697BCPZ. | Choose AD7606C-16BSTZ when sensor signals require programmable gain or anti-alias filtering - AD4697BCPZ is preferred for minimal-footprint, low-power, high-channel-density designs. |
Compared with AD4696BCPZ, AD4697BCPZ delivers double the sample rate and critical oversampling capability for noise-sensitive applications; versus AD7606C-16BSTZ, it offers 80% lower power and 60% smaller footprint at the cost of external signal conditioning - making AD4697BCPZ optimal for size- and energy-constrained precision DAQ.
Availability
AD4697BCPZ is available at Aetrix Electronics and suitable for photodiode monitoring, medical instrumentation, and automated test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD4697BCPZ 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD4697/AD4698 product line was engineered for space-constrained, multichannel precision data acquisition systems - emphasizing low power, high channel density, and simplified analog front-end design through Easy Drive and integrated digital features.
FAQ
What is the maximum sample rate supported by the AD4697BCPZ?
The AD4697BCPZ supports a maximum sample rate of 500 kSPS per channel in multiplexed mode. This is fixed for the AD4697 variant (as opposed to the 1 MSPS AD4698). The acquisition time is 715 ns at 500 kSPS, and total conversion time is 415 ns - enabling tight timing control in synchronized data acquisition systems. The AD4697BCPZ maintains full 16-bit performance across its entire specified temperature range.
Does the AD4697BCPZ include an internal reference buffer?
No, the AD4697BCPZ does not include an internal reference buffer. That feature is exclusive to the WLCSP package variants (e.g., AD4697WBCPZ). The AD4697BCPZ uses the LFCSP-24 package and requires an external buffered reference on the REF pin. Reference input high-Z mode is still supported to reduce drive requirements, but users must provide a stable, low-noise 2.4 V to 5.1 V reference source.
What package type is used for the AD4697BCPZ?
The AD4697BCPZ is supplied in a 24-lead, 4.00 mm × 4.00 mm lead frame chip scale package (LFCSP) with exposed thermal pad. This package is RoHS-compliant, moisture-sensitive level 3 (MSL-3), and rated for operation from −40°C to +125°C. Pinout and thermal characteristics are fully documented in the Analog Devices AD4697/AD4698 Rev. B datasheet, pages 13–15 and 108.
Can the AD4697BCPZ operate from a single supply?
Yes, the AD4697BCPZ supports single-supply operation using its internal low-dropout regulator (LDO). With LDO enabled, it accepts 2.4 V to 5.5 V on LDO_IN to generate a clean AVDD rail - eliminating the need for an external analog LDO. Alternatively, when the internal LDO is disabled, AVDD may be directly supplied from 2.7 V to 5.5 V, while VDD (digital core) is powered separately at 1.71 V to 1.89 V.
What is the purpose of the Easy Drive feature in the AD4697BCPZ?
The Easy Drive feature in the AD4697BCPZ comprises analog input high-Z mode and reference input high-Z mode - both significantly reducing the drive strength required from external circuitry. This allows direct connection to high-impedance sources (e.g., photodiodes, RTDs) and precision references without op-amp buffers, lowering system cost, power, and board area. It also improves channel density by relaxing layout constraints around analog routing.
AD4697BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad, CSP
- Packaging:
- Tray
- 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:
- 24-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD4697BCPZ FAQ
1.How can I place an order for AD4697BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4697BCPZ 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 AD4697BCPZ reliable?
The price and inventory of AD4697BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4697BCPZ is usually 5 days.
3.What payment methods are accepted for AD4697BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4697BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4697BCPZ?
AD4697BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4697BCPZ 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 AD4697BCPZ?
For technical support, including AD4697BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4697BCPZ requirements.
6.How does Aetrix verify that AD4697BCPZ is sourced from the original manufacturer or authorized distributors?
All AD4697BCPZ 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 AD4697BCPZ meets industry standards.
7.What is the process for return or replacement of AD4697BCPZ?
All AD4697BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD4697BCPZ, 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 AD4697BCPZ part is unused and in its original packaging.
Return procedure for AD4697BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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