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Analog Devices Inc. AD4683BCPZ-RL7
- Part No.:
- AD4683BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD4683BCPZ-RL7.pdf
- Description:
- IC ADC 16BIT SAR 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,261
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Product details
Overview
AD4683BCPZ-RL7 from Analog Devices is a dual, simultaneous-sampling, 16-bit pseudo-differential SAR ADC operating at 500 kSPS with 2.5 V internal reference, 87.5 dB SNR (VREF = 3.3 V), ±2.5 LSB INL max, and 3 mm × 3 mm 16-lead LFCSP package - designed for high-precision motor current sensing and position feedback in industrial servo drives.
For engineers reviewing the AD4683BCPZ-RL7 datasheet, AD4683BCPZ-RL7 pinout, AD4683BCPZ-RL7 application, or AD4683BCPZ-RL7 equivalent, key selection criteria include dual-channel simultaneity, oversampling support (OSR ×8), alert threshold functionality, resolution boost mode, and −40°C to +125°C operation with 1.65 V–3.6 V logic compatibility.
Technical Context
The AD4683BCPZ-RL7 implements two independent successive approximation register (SAR) cores with shared control logic and dual serial data outputs (SDOA/SDOB), enabling true simultaneous sampling of two pseudo-differential input pairs (AINA±, AINB±). Its analog front-end uses capacitive DAC-based acquisition with aperture jitter of 20 ps and match of 100 ps between channels.
It integrates an on-chip 2.5 V buffered reference (±10 ppm/°C TC), configurable external reference input (2.5 V–3.3 V), rolling-average oversampling block, resolution boost (up to 18-bit effective), and alert function triggered by programmable high/low thresholds - all controlled via SPI with CRC protection and register-based configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit native; up to 18-bit effective with resolution boost enabled - enables finer quantization steps for precision current/voltage monitoring. |
| Throughput Rate | 500 kSPS per channel, simultaneous - supports real-time closed-loop control in motor drives with ≤2 µs inter-conversion interval. |
| SNR | 87.5 dB typical (VREF = 3.3 V); 93.4 dB with OSR ×8 and RES = 1 - delivers >15 ENOB at low bandwidths for high-fidelity signal capture. |
| INL Error | ±2.5 LSB maximum - ensures monotonicity and accurate end-point linearity in feedback control loops. |
| Channel Isolation | −110 dB - prevents crosstalk between dual current and voltage sensing paths in I/Q or phase measurements. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial motor control environments. |
| Power Supply | VCC = 3.0–3.6 V; VLOGIC = 1.65–3.6 V - supports mixed-voltage system interfacing without level shifters. |
Pinout & Package
AD4683BCPZ-RL7 is housed in a 3 mm × 3 mm, 16-lead LFCSP (CP-16-451) with exposed pad (EPAD) requiring connection to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 10) | Ground reference | Low-impedance return path for analog/digital circuitry; multiple pins reduce ground bounce in high-speed conversion. |
| VLOGIC (Pin 2) | Logic interface supply | Independent 1.65–3.6 V rail powers digital interface - enables seamless interfacing with 1.8 V/2.5 V/3.3 V controllers. |
| REGCAP (Pin 3) | Internal regulator decoupling | Stabilizes on-chip 1.9 V LDO output; requires 1 µF capacitor to GND for noise suppression. |
| VCC (Pin 4) | Analog power supply | 3.0–3.6 V supply for SAR core and reference; decoupled with 1 µF capacitor for clean conversion performance. |
| AINB−/AINB+ (Pins 5, 6) | Pseudo-differential input B | AINB− typically biased at VREF/2; AINB+ accepts 0–VREF range - ideal for differential current shunt sensing. |
| AINA−/AINA+ (Pins 7, 8) | Pseudo-differential input A | Independent channel with identical structure to AINB± - enables simultaneous voltage and current measurement. |
| REFCAP (Pin 9) | Reference decoupling | Stabilizes internal 2.5 V bandgap; requires 0.1 µF capacitor to GND for optimal reference noise performance. |
| REFIO (Pin 11) | Reference I/O | Provides buffered 2.5 V output or accepts 2.5–3.3 V external reference - selectable via CONFIGURATION1 register. |
| CS (Pin 12) | Chip select / conversion trigger | Active-low signal initiates conversion and frames SPI transfers; falling edge defines aperture timing (tQUIET = 1500 ns). |
| SDOA (Pin 13) | Serial data output A | Outputs ADC A result or register data; MSB-first, twos-complement format - supports daisy-chain configurations. |
| SDOB/ALERT (Pin 14) | Dual-function terminal | Configurable as ADC B output or active-low alert flag - indicates out-of-threshold condition per CONFIGURATION1/2 settings. |
| SDI (Pin 15) | Serial data input | Accepts register writes (CONFIGURATION1/2, ALERT thresholds); synchronous to SCLK falling edge. |
| SCLK (Pin 16) | Serial clock input | Drives SPI interface; min period 25 ns (40 MHz max) - supports high-throughput register access and data readback. |
| EPAD | Exposed thermal pad | Must be soldered to solid GND plane for thermal dissipation (θJC = 12.7°C/W) and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous sampling | Enables time-aligned capture of voltage and current in motor phases - eliminates phase skew in field-oriented control (FOC). |
| Oversampling (OSR ×8) | Improves SNR by 5.9 dB and reduces effective noise floor - allows lower-bandwidth anti-aliasing filters and relaxed analog design. |
| Alert function with programmable thresholds | Hardware-triggered interrupt on out-of-range conversion - enables real-time fault detection without CPU polling overhead. |
| Resolution boost (18-bit mode) | Increases effective resolution without external averaging - enhances dynamic range for low-amplitude signals in EDFA or sonar applications. |
| −40°C to +125°C operation | Guaranteed performance across full industrial temperature range - suitable for embedded motor drives and power converters. |
| 16-lead 3 mm × 3 mm LFCSP | Reduces PCB area vs. legacy 24-lead QFN alternatives - supports high-density control board layouts. |
Applications
| Motor Control Current Sensing | Motor Control Position Feedback |
|---|---|
Use Scenario: Real-time phase current measurement in three-phase PMSM/BLDC inverters using shunt resistors. IC Role / Device Role / Timing Role: Dual simultaneous sampling ADC captures IA and IB at precise PWM dead-time intervals to reconstruct IC and compute torque vector. Use Value: 500 kSPS throughput and <100 ps aperture delay match ensure sub-degree current angle accuracy for FOC algorithms. |
Use Scenario: High-resolution rotor position acquisition from resolvers or encoders in servo actuators. IC Role / Device Role / Timing Role: Simultaneous sampling of sine/cosine resolver outputs with 16-bit linearity preserves angular resolution below 0.01°. Use Value: ±2.5 LSB INL and 93.4 dB SNR with OSR ×8 enable direct high-fidelity digitization without external amplification or filtering. |
| Power Quality Monitoring | Erbium-Doped Fiber Amplifier (EDFA) |
Use Scenario: Multi-channel voltage/current waveform capture in smart grid meters and PQ analyzers. IC Role / Device Role / Timing Role: Dual pseudo-differential inputs monitor line-to-line voltage and neutral current simultaneously for harmonic analysis. Use Value: −110 dB channel isolation prevents cross-coupling between high-voltage and low-current measurement paths. |
Use Scenario: Precision bias current and photodiode current monitoring in optical amplifier modules. IC Role / Device Role / Timing Role: Low-noise 16-bit conversion of slow-varying analog control signals with resolution boost for fine gain adjustment. Use Value: 2.5 V internal reference with 5 ppm/°C drift and 7 µVrms noise ensures stable calibration over temperature and time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, simultaneous-sampling SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD4682BCPZ-RL7 | 1 MSPS throughput, identical pinout and feature set - higher speed but 2.6 mA higher VCC current at full rate. | Preferred where loop update rate exceeds 500 kHz (e.g., high-bandwidth servo control). | Select AD4682BCPZ-RL7 only if system requires >500 kSPS dual-channel sampling; otherwise AD4683BCPZ-RL7 offers better power efficiency. |
| AD7380BCPZ-RL7 | Differential input architecture (not pseudo-differential), 16-bit, 1 MSPS, no oversampling or alert function - lacks resolution boost and programmable thresholds. | Suitable for applications needing true differential signaling (e.g., isolated current sensors) but not alert-driven fault response. | Choose AD7380BCPZ-RL7 when differential input common-mode rejection >80 dB is required and oversampling/alert features are unnecessary. |
Compared with AD4682BCPZ-RL7, AD4683BCPZ-RL7 trades 2× lower throughput for 33% lower power consumption and identical precision; versus AD7380BCPZ-RL7, it provides pseudo-differential flexibility, hardware alerting, and oversampling - critical for cost-sensitive, thermally constrained motor control designs.
Availability
AD4683BCPZ-RL7 is available at Aetrix Electronics and suitable for motor control position feedback, motor control current sense, and power quality monitoring requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.
Supply support for AD4683BCPZ-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 AD468x family was developed specifically for high-accuracy, dual-channel data acquisition in real-time control systems - emphasizing simultaneity, low latency, and integrated diagnostics for motor drives and power electronics.
FAQ
What is the maximum sampling rate of the AD4683BCPZ-RL7?
The AD4683BCPZ-RL7 operates at a maximum throughput conversion rate of 500 kSPS per channel with true simultaneous sampling. This is fixed for the AD4683 variant - unlike the pin-compatible AD4682BCPZ-RL7, which supports 1 MSPS. The tCYC parameter is 2 µs, confirming the 500 kSPS limit.
Does the AD4683BCPZ-RL7 support external reference voltage?
Yes, the AD4683BCPZ-RL7 supports external reference voltages from 2.5 V to 3.3 V applied to the REFIO pin. To enable this, the REFSEL bit in the CONFIGURATION1 register must be set to 1 after powering VCC and VLOGIC. A 1 µF decoupling capacitor is required on REFIO regardless of internal or external reference use.
How does the alert function work on the AD4683BCPZ-RL7?
The AD4683BCPZ-RL7's ALERT function is implemented on Pin 14 (SDOB/ALERT). When enabled via ALERT_EN bit in CONFIGURATION1 and SDO bit in CONFIGURATION2, it asserts low when a conversion result exceeds user-defined high or low thresholds stored in ALERT_HIGH_THRESHOLD and ALERT_LOW_THRESHOLD registers. Response time is 220 ns from CS falling edge.
What is the purpose of the REGCAP pin on the AD4683BCPZ-RL7?
The REGCAP pin (Pin 3) provides access to the output of the AD4683BCPZ-RL7's internal LDO regulator, which supplies 1.9 V to internal circuitry. It must be decoupled to GND with a 1 µF capacitor to stabilize the regulator and suppress switching noise that could degrade ADC performance or reference accuracy.
Can the AD4683BCPZ-RL7 perform oversampling, and what benefit does it provide?
Yes, the AD4683BCPZ-RL7 includes an on-chip rolling-average oversampling block supporting OSR up to ×8. With OSR = ×8 and RES = 1, SNR improves from 87.5 dB to 93.4 dB - effectively increasing ENOB by ~1 bit and reducing in-band noise without external digital processing.
Is the AD4683BCPZ-RL7 pin-compatible with other devices in the same family?
Yes, the AD4683BCPZ-RL7 is fully pin-compatible with the AD4682BCPZ-RL7 and shares identical 16-lead LFCSP package, pinout, and register map. This allows drop-in replacement where throughput requirements permit - e.g., upgrading from AD4683 to AD4682 for higher speed without layout changes.
AD4683BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 2
- Input Type:
- Pseudo-Differential
- Data Interface:
- Serial
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:2
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 1.65V ~ 3.6V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-LFCSP (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD4683BCPZ-RL7 FAQ
1.How can I place an order for AD4683BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4683BCPZ-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 AD4683BCPZ-RL7 reliable?
The price and inventory of AD4683BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4683BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD4683BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4683BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4683BCPZ-RL7?
AD4683BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4683BCPZ-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 AD4683BCPZ-RL7?
For technical support, including AD4683BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4683BCPZ-RL7 requirements.
6.How does Aetrix verify that AD4683BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD4683BCPZ-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 AD4683BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD4683BCPZ-RL7?
All AD4683BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD4683BCPZ-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 AD4683BCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD4683BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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