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Analog Devices Inc. AD4695BCPZ-RL7
- Part No.:
- AD4695BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD4695BCPZ-RL7.pdf
- Description:
- IC ADC 16BIT SAR 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,463
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Product details
Overview
AD4695BCPZ-RL7 from Analog Devices is a 16-bit, 16-channel, 500 kSPS multiplexed SAR ADC with Easy Drive architecture, integrated oversampling, threshold detection, and autonomous conversion mode. It features ±1.0 LSB INL, 93 dB SINAD at 1 kHz, on-chip reference buffer (WLCSP only - not applicable to this LFCSP variant), and operates from −40°C to +125°C for high-reliability photodiode monitoring and medical instrumentation.
For engineers reviewing the AD4695BCPZ-RL7 datasheet, AD4695BCPZ-RL7 pinout, AD4695BCPZ-RL7 application, or AD4695BCPZ-RL7 equivalent, key selection considerations include guaranteed 16-bit no-missing-codes performance, 500 kSPS sample rate with 71.5% acquisition phase, low 8 mW power at full speed, overvoltage protection up to 5 mA per input, and support for unipolar/pseudobipolar modes with flexible SPI interface.
Technical Context
The AD4695BCPZ-RL7 implements a true 16-bit successive approximation register (SAR) core with no missing codes and integrates a 16-channel low-crosstalk analog multiplexer, on-chip oversampling (OSR up to 64), and autonomous autocycle mode. Its Easy Drive architecture enables analog input high-Z and reference input high-Z modes, reducing external driver requirements.
It supports dual-/quad-SDO SPI configurations for low clock-rate operation, includes programmable channel sequencing, offset/gain correction registers, and threshold-based alert generation on general-purpose pins. The device uses a single 2.7 V to 5.5 V analog supply with internal LDO and 1.14 V to 1.98 V logic I/O voltage.
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 acquisition in automated test equipment and process control systems. |
| INL | ±1.0 LSB max - enables accurate absolute voltage measurement without calibration across temperature (−40°C to +125°C). |
| SINAD | 93 dB typical at fIN = 1 kHz - delivers high signal fidelity for low-noise applications like vital signs monitoring. |
| Oversampled DR | 111.2 dB at OSR = 64 - reduces effective input noise to 4.9 µV rms for enhanced resolution in low-frequency sensor readouts. |
| Power Dissipation | 8 mW at 500 kSPS - enables battery-powered operation while maintaining precision in portable instrumentation. |
| Analog Supply | 2.7 V to 5.5 V single AVDD - simplifies power design by eliminating separate analog/digital rails. |
| Input Overvoltage Clamp | 5 mA per channel, activation at VREF + 0.55 V - protects against transient faults without degrading adjacent channel crosstalk (−123 dB isolation). |
Pinout & Package
AD4695BCPZ-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 per Analog Devices' Rev. B datasheet, Figure 14 (Pin Configuration and Function Descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVDD | Analog supply input | Accepts 2.7 V–5.5 V; powers SAR core, mux, and analog front end - requires local 10 µF + 100 nF decoupling. |
| VIO | Digital I/O supply | 1.14 V–1.98 V logic interface; independent of AVDD - enables low-voltage MCU interfacing without level shifters. |
| REF/REFIN | Reference input | Accepts 2.4 V–5.1 V external reference; high-Z mode reduces drive burden - no internal buffer in LFCSP variant. |
| CONVST | Conversion start trigger | Edge-sensitive input initiating sampling; supports hardware-triggered synchronized acquisition across multiple channels. |
| SDO_A / SDO_B / SDO_C / SDO_D | Serial data outputs | Supports quad-SDO mode for 16-bit data output in ≤4 clocks - lowers required SPI clock frequency and EMI. |
| ALERT | Threshold violation indicator | Open-drain output asserting on user-defined channel-level over/under-limit conditions - enables interrupt-driven firmware. |
| GP0–GP3 | General-purpose I/O | Configurable as inputs or outputs; can mirror ALERT or BUSY status - adds flexibility for system-level signaling without extra GPIOs. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive analog input high-Z mode | Reduces required input drive strength by >90%, eliminating need for dedicated op-amp drivers in multichannel AFEs. |
| On-chip oversampling & decimation (OSR up to 64) | Improves effective resolution by up to 2.5 bits and reduces post-processing load on host microcontroller. |
| Autonomous autocycle mode | Performs continuous conversions without host intervention - ideal for low-power wake-on-event sensor monitoring. |
| Programmable channel sequencer | Supports custom scan orders and disabled channels - optimizes throughput for sparse or asymmetric channel sets. |
| Per-channel threshold detection | Generates hardware alerts on out-of-range readings - enables real-time fault response without polling overhead. |
| Overvoltage protection clamps (5 mA/channel) | Isolates fault currents per input, preventing cross-channel corruption - critical for mixed-signal industrial I/O modules. |
Applications
| Photodiode Monitoring | Medical Instrumentation |
|---|---|
|
Use Scenario: Simultaneous readout of 16 photodiode current outputs in optical blood oximetry or spectroscopy systems. IC Role / Device Role / Timing Role: Precision multichannel SAR ADC with low input bias (2 nA) and high CMRR (69.5 dB) to preserve weak photocurrent integrity. Use Value: Enables direct connection of transimpedance amplifier outputs without additional buffering, reducing board area and noise sources. |
Use Scenario: High-accuracy acquisition of ECG, EEG, and bioimpedance signals in portable diagnostic devices. IC Role / Device Role / Timing Role: 16-bit no-missing-codes converter with 93 dB SINAD and −123 dB channel isolation for clean differential biosignal capture. Use Value: Supports FDA-grade accuracy requirements while operating at 8 mW - extends battery life in Class II medical wearables. |
| Vital Signs Monitoring | Automated Test Equipment |
|
Use Scenario: Continuous acquisition of temperature, respiration, and pulse waveforms in ICU patient monitors. IC Role / Device Role / Timing Role: Integrated temperature sensor (680 mV @ 25°C, −1.8 mV/°C) and autocycle mode for self-timed measurements. Use Value: Eliminates external temperature sensor and timing controller - reduces BOM count and firmware complexity. |
Use Scenario: Multichannel voltage/current measurement in PXI or benchtop ATE platforms requiring fast, repeatable sampling. IC Role / Device Role / Timing Role: 500 kSPS throughput with first-conversion accuracy and no pipeline latency - ensures deterministic timing for stimulus-response testing. Use Value: Delivers consistent 16-bit results across all 16 inputs without recalibration, improving test repeatability and throughput. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD4696BCPZ-RL7 | 1 MSPS sample rate, identical pinout and feature set - differs only in maximum throughput and autocycle timing parameters. | Required where channel aggregate bandwidth exceeds 500 kSPS; otherwise functionally interchangeable in fixed-rate systems. | Select AD4696BCPZ-RL7 when system-level timing budget demands ≥1 MSPS per channel or tighter autocycle intervals. |
| ADS8686SIPWR | 16-bit, 2-channel, 1 MSPS, integrated PGA and reference; no oversampling or autocycle; different SPI protocol and pinout. | Better suited for lower-channel-count, higher-gain sensor interfaces with built-in programmable gain amplification. | Choose ADS8686SIPWR only when PGA functionality is needed and channel count ≤2 - not a drop-in replacement. |
Compared with AD4695BCPZ-RL7, the AD4696BCPZ-RL7 offers higher throughput at identical power and feature depth, while the ADS8686SIPWR trades channel density and autonomous features for integrated signal conditioning - making AD4695BCPZ-RL7 optimal for space-constrained, high-channel-count, low-power precision monitoring.
Availability
AD4695BCPZ-RL7 is available at Aetrix Electronics and suitable for photodiode monitoring, medical instrumentation, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed 16-bit precision performance.
Supply support for AD4695BCPZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The AD4695 is part of Analog Devices' Easy Drive precision ADC family, designed specifically for space-constrained, multichannel data acquisition systems demanding low power, high accuracy, and simplified analog front-end design.
FAQ
What is the maximum sample rate supported by the AD4695BCPZ-RL7?
The AD4695BCPZ-RL7 supports a maximum sample rate of 500 kSPS across all 16 channels. This is a fixed specification distinguishing it from the pin-compatible AD4696BCPZ-RL7, which supports 1 MSPS. The 500 kSPS rate is guaranteed over the full −40°C to +125°C temperature range with no missing codes and ±1.0 LSB INL performance.
Does the AD4695BCPZ-RL7 include an on-chip reference buffer?
No, the AD4695BCPZ-RL7 does not include an on-chip reference buffer. That feature is exclusive to the WLCSP variant (e.g., AD4695BCPZ-RL7-WLCSP). The LFCSP package (AD4695BCPZ-RL7) requires an external buffered reference source, though its reference input high-Z mode reduces drive requirements to just 12 µA at 1 MSPS.
How does the Easy Drive architecture benefit system design with the AD4695BCPZ-RL7?
The Easy Drive architecture in the AD4695BCPZ-RL7 provides analog input high-Z mode and reference input high-Z mode, reducing required drive current by up to 95% compared to conventional SAR ADCs. This allows direct connection to high-impedance sensors and eliminates external op-amp drivers and reference buffers - cutting BOM cost, PCB area, and noise sources in dense multichannel layouts.
Can the AD4695BCPZ-RL7 operate from a single 3.3 V supply?
Yes, the AD4695BCPZ-RL7 supports AVDD from 2.7 V to 5.5 V, so a single 3.3 V supply fully satisfies its analog rail requirement. Its VIO rail accepts 1.14 V to 1.98 V, enabling direct interface with 1.8 V logic families. Internal LDO operation is optional - disabling it allows ultra-low standby power (4 µW) when using separate 1.8 V digital supply.
What packaging and RoHS compliance status does the AD4695BCPZ-RL7 have?
The AD4695BCPZ-RL7 is supplied in a 32-lead, 5 mm × 5 mm lead frame chip scale package (LFCSP) with exposed thermal pad and is RoHS-compliant and lead-free. The "-RL7" suffix denotes tape-and-reel packaging (7-inch reel, 1500 units), and the "BCPZ" prefix confirms the LFCSP package type per Analog Devices' ordering guide.
AD4695BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- AD4695
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- 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:
- 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, 3.15V ~ 5.5V
- Features:
- Temperature Sensor, Internal Oscillator
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 32-LFCSP-WQ (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD4695BCPZ-RL7 FAQ
1.How can I place an order for AD4695BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4695BCPZ-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 AD4695BCPZ-RL7 reliable?
The price and inventory of AD4695BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4695BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD4695BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4695BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4695BCPZ-RL7?
AD4695BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4695BCPZ-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 AD4695BCPZ-RL7?
For technical support, including AD4695BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4695BCPZ-RL7 requirements.
6.How does Aetrix verify that AD4695BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD4695BCPZ-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 AD4695BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD4695BCPZ-RL7?
All AD4695BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD4695BCPZ-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 AD4695BCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD4695BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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