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Analog Devices Inc. AD4695BCBZ-RL7
- Part No.:
- AD4695BCBZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 36-UFBGA, WLCSP
- Datasheet:
-
AD4695BCBZ-RL7.pdf
- Description:
- 16 CH 16 BIT 500 KSPS SAR ADC
- Quantity:
- Payment:
- Shipping:
Inventory:2,457
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Product details
Overview
AD4695BCBZ-RL7 from Analog Devices is a 16-bit, 16-channel, 500 kSPS multiplexed SAR ADC with Easy Drive architecture, integrated overvoltage protection (±5 mA per input), on-chip oversampling (OSR up to 64), and autonomous conversion mode - deployed in photodiode monitoring and battery-powered medical instrumentation.
For engineers reviewing the AD4695BCBZ-RL7 datasheet, AD4695BCBZ-RL7 pinout, AD4695BCBZ-RL7 application, or AD4695BCBZ-RL7 equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance, ±1.0 LSB INL max at 500 kSPS, 93 dB SINAD at 1 kHz, 32-lead 5 mm × 5 mm LFCSP package, and support for unipolar/pseudobipolar input modes with internal LDO enabling single 2.7 V–5.5 V analog supply operation.
Technical Context
The AD4695BCBZ-RL7 implements a true 16-bit SAR core with long acquisition phase (≥715 ns at 1 MSPS-equivalent timing), analog input high-Z mode, and reference input high-Z mode - reducing external driver requirements. It integrates a 16-channel low-crosstalk multiplexer, customizable channel sequencer, and threshold detection with alert indicators.
Digital functionality includes dual-/quad-SDO SPI interface, autocycle mode for interrupt-driven firmware, on-chip offset/gain correction, and oversampling/decimation - all operating with 1.14 V–1.98 V logic voltage and supporting OSR = 64 for 111.2 dB dynamic range enhancement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no missing codes - ensures full code coverage for precision measurement systems. |
| Sample Rate | 500 kSPS - enables real-time capture of fast transients in multichannel sensor arrays without pipeline latency. |
| INL | ±1.0 LSB maximum - maintains linearity across full temperature range (−40°C to +125°C) for calibrated instrumentation. |
| SINAD | 93 dB typical at fIN = 1 kHz - delivers high-fidelity digitization for low-noise analog front ends. |
| Oversampled DR | 111.2 dB at OSR = 64 - reduces effective input RMS noise to 4.9 µV rms for sub-µV-level signal resolution. |
| Power Dissipation | 8 mW at 500 kSPS - supports thermally constrained, battery-operated designs with minimal thermal management overhead. |
| Input Overvoltage Clamp | ±5 mA per channel with activation at VREF + 0.55 V - protects against transient faults while isolating channel-to-channel crosstalk degradation. |
Pinout & Package
AD4695BCBZ-RL7 is housed in a 32-lead, 5 mm × 5 mm lead frame chip scale package (LFCSP) with exposed thermal pad. Pin functions are defined for analog inputs (AIN0–AIN15), reference (REF/REFIN), power (AVDD, VDD, VIO, AGND, IOGND), digital interface (SCLK, SDI, SDOx, CS), and general-purpose I/O (GP0–GP3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN15 | Analog input channels | 16 single-ended or 8 differential inputs with integrated overvoltage clamps and high-Z mode support. |
| REF / REFIN | Reference voltage input | Accepts 2.4 V–5.1 V external reference; high-Z mode reduces drive burden by >95% vs conventional SAR ADCs. |
| AVDD | Analog supply | 2.7 V–5.5 V single supply; powers ADC core, mux, and internal LDO - eliminates need for separate analog rail regulators. |
| VIO | Digital I/O supply | 1.14 V–1.98 V logic interface - compatible with ultra-low-voltage microcontrollers and FPGAs. |
| SCLK / SDI / SDO0–SDO3 / CS | SPI interface | Supports dual-/quad-SDO modes to reduce host SPI clock rate requirements and simplify timing margins. |
| GP0–GP3 | General-purpose pins | Configurable as alert outputs (threshold detection), busy indicators, or GPIO - enables autonomous system-level event handling. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive architecture | Reduces analog input and reference drive current requirements by >95%, eliminating external op-amp buffers in most configurations. |
| On-chip oversampling & decimation | OSR up to 64 improves SNR by 17.8 dB and reduces effective input noise to 4.9 µV rms - replaces external digital filtering. |
| Autonomous conversion (autocycle) | Enables continuous background sampling with programmable sample periods (8.5 µs to 920 µs) - minimizes host CPU intervention. |
| Threshold detection alerts | Per-channel high/low limit comparison with configurable alert outputs on GP pins - supports wake-on-event firmware design. |
| Internal LDO | Generates stable AVDD from 2.4 V–5.5 V LDO_IN, enabling single-supply operation and simplifying power tree design. |
Applications
| Photodiode Monitoring | Medical Instrumentation |
|---|---|
Use Scenario: High-density optical sensing arrays in portable pulse oximeters and capnographs requiring simultaneous multi-wavelength analog signal capture. IC Role / Device Role / Timing Role: 16-channel precision ADC with 500 kSPS aggregate throughput and low-latency first-conversion accuracy - digitizes photodiode currents with <1 µV RMS noise floor. Use Value: Enables 16× channel density in same PCB area vs legacy 8-channel ADCs, while maintaining 16-bit integrity and eliminating external reference buffering. |
Use Scenario: Vital signs monitors measuring ECG, respiration, and temperature using isolated analog front ends with strict power budget constraints. IC Role / Device Role / Timing Role: Low-power, high-accuracy ADC with 4 µW standby dissipation and internal LDO - operates directly from coin-cell or Li-ion battery without intermediate regulators. Use Value: Extends device runtime by >30% versus comparable ADCs due to 8 mW active power and zero-latency autocycle mode reducing host wake cycles. |
| Electronic Test Equipment | Battery-Powered Equipment |
Use Scenario: Portable multimeters and data loggers capturing slow-varying sensor signals (e.g., thermocouples, strain gauges) with high DC accuracy. IC Role / Device Role / Timing Role: Precision SAR ADC with ±1.0 LSB INL, ±360 µV offset error, and 0.5 µV/°C drift - provides factory-calibration-grade linearity without trimming. Use Value: Eliminates post-manufacture calibration steps through guaranteed monotonicity and no-missing-codes performance across −40°C to +125°C. |
Use Scenario: Wireless industrial sensors transmitting vibration, pressure, and humidity data via BLE or LoRaWAN with intermittent wake-up intervals. IC Role / Device Role / Timing Role: Autonomous ADC with GP-pin alert outputs and programmable autocycle periods - triggers host MCU only on threshold violation, minimizing active time. Use Value: Reduces average system current by >70% compared to polled architectures, extending 2-year battery life to >5 years in field-deployed nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD4696BCBZ-RL7 | 1 MSPS sample rate (vs. 500 kSPS), identical pinout and feature set - differs only in maximum throughput and minor timing specs. | Preferred where higher channel aggregate bandwidth is required; not drop-in for timing-critical 500 kSPS systems with fixed cycle budgets. | Select AD4696BCBZ-RL7 only if system requires ≥1 MSPS sustained sampling; otherwise AD4695BCBZ-RL7 offers optimal power/performance trade-off. |
| ADS8688IPWR | 8-channel, 16-bit, 500 kSPS SAR ADC with integrated PGA and reference; uses 3.3 V/1.8 V dual supply and TSSOP-38 package. | Lacks Easy Drive, oversampling, autocycle, and overvoltage clamps; requires external reference buffer and driver amplifiers for high-Z sources. | Choose ADS8688IPWR only when PGA gain flexibility is essential and board space allows larger TSSOP package; AD4695BCBZ-RL7 delivers superior integration in space-constrained designs. |
Compared with AD4696BCBZ-RL7, AD4695BCBZ-RL7 trades 2× sample rate for lower power and tighter timing control; versus ADS8688IPWR, it provides 2× channel count, on-chip oversampling, and fault-tolerant input clamps - reducing BOM count by ≥4 passive components per channel.
Availability
AD4695BCBZ-RL7 is available at Aetrix Electronics and suitable for photodiode monitoring, medical instrumentation, and battery-powered equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD4695BCBZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD4695 is part of Analog Devices' Easy Drive precision ADC product line, engineered specifically for space-constrained, multichannel data acquisition systems demanding low power, high accuracy, and robust input protection without external support circuitry.
FAQ
What is the maximum sample rate supported by the AD4695BCBZ-RL7?
The AD4695BCBZ-RL7 supports a maximum sample rate of 500 kSPS in standard conversion mode. This is a fixed specification distinguishing it from the pin-compatible AD4696BCBZ-RL7, which operates at 1 MSPS. The 500 kSPS rate applies across all 16 channels in multiplexed operation and is guaranteed over the full −40°C to +125°C temperature range with AVDD = 2.7 V–5.5 V and VIO = 1.14 V–1.98 V.
Does the AD4695BCBZ-RL7 require an external reference buffer?
No, the AD4695BCBZ-RL7 does not require an external reference buffer due to its Easy Drive architecture and reference input high-Z mode, which reduces REF input current to just 6 µA at 500 kSPS. Unlike conventional SAR ADCs, it eliminates the need for dedicated op-amp buffers in most applications - though an external buffer may still be used for ultra-low-noise or high-impedance reference sources.
How does the overvoltage protection work on the AD4695BCBZ-RL7 analog inputs?
The AD4695BCBZ-RL7 integrates per-channel overvoltage clamps that activate at VREF + 0.55 V and limit input current to ±5 mA. Each clamp operates independently to prevent fault propagation between channels. Clamping occurs within 50 ns, and deactivation happens at VREF + 0.1 V. External series resistance (≥2 kΩ) and capacitance (500 pF) are recommended for stable operation during overvoltage events.
Can the AD4695BCBZ-RL7 operate from a single 3.3 V supply?
Yes, the AD4695BCBZ-RL7 can operate from a single 3.3 V supply applied to AVDD, with LDO_IN tied to AVDD and internal LDO enabled. Its internal LDO supports 2.4 V–5.5 V input and generates a clean analog rail; VIO must be separately supplied at 1.14 V–1.98 V for digital interface compatibility. This configuration eliminates the need for discrete analog regulators in compact designs.
What is the purpose of the autocycle mode in the AD4695BCBZ-RL7?
The autocycle mode in the AD4695BCBZ-RL7 enables fully autonomous, periodic conversions without host processor intervention. It supports eight programmable sample periods (from 8.5 µs to 920 µs), threshold-based alert generation on GP pins, and seamless integration with low-power firmware architectures. This mode reduces system-level power consumption by allowing the host MCU to remain in deep sleep until an alert condition occurs.
AD4695BCBZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- AD4695
- Package/Case:
- 36-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 16
- Input Type:
- Pseudo-Differential
- Data Interface:
- DSP, MICROWIRE, QSPI, Serial, SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- 1:1
- 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, 3.15V ~ 5.5V
- Features:
- Temperature Sensor, Internal Oscillator
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 36-WLCSP (2.96x2.96)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD4695BCBZ-RL7 FAQ
1.How can I place an order for AD4695BCBZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4695BCBZ-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 AD4695BCBZ-RL7 reliable?
The price and inventory of AD4695BCBZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4695BCBZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD4695BCBZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4695BCBZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4695BCBZ-RL7?
AD4695BCBZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4695BCBZ-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 AD4695BCBZ-RL7?
For technical support, including AD4695BCBZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4695BCBZ-RL7 requirements.
6.How does Aetrix verify that AD4695BCBZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD4695BCBZ-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 AD4695BCBZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD4695BCBZ-RL7?
All AD4695BCBZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD4695BCBZ-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 AD4695BCBZ-RL7 part is unused and in its original packaging.
Return procedure for AD4695BCBZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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