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Analog Devices Inc. AD7384-4BCPZ-RL7
- Part No.:
- AD7384-4BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-UFQFN Exposed Pad, CSP
- Datasheet:
-
AD7384-4BCPZ-RL7.pdf
- Description:
- PSEUDO DIFFERL INPUT QUAD 14-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:2,125
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Product details
Overview
AD7384-4BCPZ-RL7 from Analog Devices is a 14-bit, quad-channel, simultaneous-sampling SAR ADC with pseudo-differential inputs, 4 MSPS throughput, 83.5 dB typical SNR (VREF = 3.3 V), and integrated oversampling (91.3 dB SNR at OSR = 8×). It operates from −40°C to +125°C in motor control current sensing and high-speed data acquisition systems.
For engineers reviewing the AD7384-4BCPZ-RL7 datasheet, AD7384-4BCPZ-RL7 pinout, AD7384-4BCPZ-RL7 application, or AD7384-4BCPZ-RL7 equivalent, key selection criteria include simultaneous 4-channel sampling accuracy, oversampling-enabled dynamic range enhancement, pseudo-differential input drive requirements, and LFCSP-24 thermal performance in industrial embedded designs.
Technical Context
The AD7384-4BCPZ-RL7 implements four independent successive approximation register (SAR) cores sharing a common CS-triggered conversion start, enabling true simultaneous sampling across all channels. Its pseudo-differential architecture accepts AINx+ signals referenced to AINx− held at VREF/2, reducing common-mode noise sensitivity.
Oversampling is implemented via on-chip digital averaging (normal or rolling mode), configurable through registers to boost effective resolution by up to 2 bits and improve SNR without external hardware. The device supports both internal 2.5 V and external 2.5 V–3.3 V references, with separate VLOGIC (1.65 V–3.6 V) for flexible interface voltage compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit native; supports 2-bit resolution boost via oversampling for enhanced dynamic range in low-bandwidth applications. |
| Throughput Rate | 4 MSPS per channel, simultaneous sampling ensures time-aligned capture across all four inputs for phase-critical measurements. |
| SNR | 83.5 dB typical at 1 kHz input with 3.3 V reference; improves to 91.3 dB with 8× oversampling for precision DC/low-frequency monitoring. |
| INL Error | ±0.35 LSB max with external 3.3 V reference, ensuring accurate absolute measurement linearity in closed-loop control feedback. |
| Channel Isolation | −110 dB, minimizing crosstalk between simultaneously sampled channels in multi-sensor systems. |
| Operating Temperature | −40°C to +125°C, qualified for under-hood automotive and industrial motor drive environments. |
| Supply Voltages | VCC = 3.0–3.6 V; VLOGIC = 1.65–3.6 V - enables direct interfacing with 1.8 V, 2.5 V, or 3.3 V microcontrollers without level shifters. |
Pinout & Package
AD7384-4BCPZ-RL7 is housed in a 24-lead, 4 mm × 4 mm LFCSP (CP-24-251) package with exposed pad (EPAD) requiring connection to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,5,14,16) | Ground reference | Four dedicated ground pins minimize ground bounce and ensure stable reference for all analog and digital sections. |
| VLOGIC (Pin 2) | Logic interface supply | Independent 1.65–3.6 V rail decoupled with 1 µF capacitor; sets logic threshold for SPI interface compatibility. |
| REGCAP (Pin 3) | Internal regulator decoupling | Connects to 1 µF capacitor to stabilize 1.9 V internal bias rail; critical for analog core stability. |
| VCC (Pin 4) | Analog/digital power supply | 3.0–3.6 V main supply decoupled with 1 µF capacitor; powers SAR cores, reference, and digital logic. |
| AINA± to AIND± (Pins 6–13) | Pseudo-differential analog inputs | Four matched pairs (A–D); each pair requires AINx− tied to VREF/2 to establish common-mode point for differential measurement. |
| REFCAP (Pin 15) | Reference decoupling | 0.1 µF capacitor stabilizes internal 2.5 V bandgap reference; essential for low-noise reference performance. |
| REFIO (Pin 17) | Reference I/O | Bi-directional pin: outputs internal 2.5 V reference or accepts external 2.5–3.3 V reference; REFSEL bit configures mode. |
| CS (Pin 18) | Chip select / conversion trigger | Active-low signal initiates simultaneous sampling and frames SPI data transfers; falling edge triggers acquisition. |
| SDOA–SDOC (Pins 19–23) | Serial data outputs | Dedicated SDO pins per channel enable parallel readout; supports 4-wire mode for maximum throughput or 1-wire daisy-chain. |
| SDOD/ALERT (Pin 24) | Data output or out-of-range indicator | Configurable as fourth data output or active-low ALERT flag signaling threshold violation in register-monitored mode. |
Key Features
| Feature | Design Value |
|---|---|
| Quad simultaneous sampling | Guarantees time-aligned capture across all four channels with <145 ps aperture delay match, eliminating inter-channel timing skew in motor phase current analysis. |
| On-chip oversampling block | Configurable digital averaging (OSR = 2× to 8×) increases effective resolution and SNR without external filtering or FPGA resources. |
| Pseudo-differential input structure | Reduces amplifier drive burden with only 5 pF hold-mode input capacitance and eliminates need for fully differential drivers in cost-sensitive designs. |
| Out-of-range alert (ALERT) | Hardware interrupt pin flags over/under-range conditions based on programmable thresholds, enabling real-time fault detection without host CPU polling. |
| Wide temperature operation | Specified performance maintained from −40°C to +125°C supports deployment in engine control units and industrial inverters without derating. |
Applications
| Motor Control Current Sense | Motor Control Position Feedback |
|---|---|
Use Scenario: Real-time sampling of three-phase motor winding currents and neutral current in servo drives. IC Role / Device Role / Timing Role: Simultaneous 4-channel acquisition captures instantaneous current vectors for field-oriented control (FOC) algorithms with sub-250 ns inter-channel skew. Use Value: Enables precise torque ripple suppression and efficient vector control using native 4 MSPS throughput and <145 ps channel-to-channel delay matching. | Use Scenario: High-resolution angular position tracking using resolver or encoder sine/cosine outputs in robotic joints. IC Role / Device Role / Timing Role: Pseudo-differential inputs directly digitize resolver secondary signals referenced to VREF/2, rejecting common-mode noise from PWM switching. Use Value: Delivers 14-bit linearity (±0.35 LSB INL) and −110 dB channel isolation for accurate rotor angle reconstruction in noisy EMI environments. |
| Data Acquisition Systems | Erbium-Doped Fiber Amplifier (EDFA) |
Use Scenario: Multi-channel sensor monitoring in industrial PLC analog input modules with cold-junction compensation and strain gauge bridges. IC Role / Device Role / Timing Role: Quad SAR architecture replaces multiple single-channel ADCs, reducing BOM count and PCB area while maintaining independent channel calibration. Use Value: Integrated 2.5 V reference and oversampling eliminate external reference ICs and post-processing DSP, lowering system cost and latency. | Use Scenario: Monitoring pump laser diode current, photodiode feedback, and thermistor temperature in optical amplifier control loops. IC Role / Device Role / Timing Role: Simultaneous sampling of correlated analog parameters enables closed-loop gain stabilization with deterministic timing alignment. Use Value: 91.3 dB SNR at 8× oversampling ensures sub-microamp current resolution and <0.1°C temperature accuracy in high-gain optical control paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7383-4BCPZ-RL7 | 16-bit resolution, higher INL (±1.4 LSB), lower SNR (86.7 dB) vs. AD7384-4 at same throughput | Better suited for absolute precision DC measurements where resolution >14 bits is mandatory | Select when full 16-bit linearity and higher dynamic range are required despite increased power and cost |
| AD7380-4BCPZ-RL7 | Differential input architecture (vs. pseudo-differential), 16-bit, 3 MSPS max, no oversampling block | Requires fully differential driver circuitry; lacks hardware ALERT and resolution boost features | Choose for legacy differential sensor interfaces where oversampling and alerting are not needed |
Compared with AD7383-4BCPZ-RL7 and AD7380-4BCPZ-RL7, the AD7384-4BCPZ-RL7 offers optimal balance of speed, resolution, and integrated features-delivering 14-bit fidelity with oversampling-enhanced SNR and hardware alerting in the smallest footprint, making it ideal for space-constrained, high-channel-count industrial controllers.
Availability
AD7384-4BCPZ-RL7 is available at Aetrix Electronics and suitable for motor control current sensing, data acquisition systems, and Erbium-doped fiber amplifier (EDFA) applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7384-4BCPZ-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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The AD7384-4BCPZ-RL7 belongs to the AD738x-4 family of quad simultaneous-sampling SAR ADCs, designed specifically for high-fidelity, time-aligned multi-channel acquisition in demanding real-time control and instrumentation systems.
FAQ
What is the maximum sampling rate supported by the AD7384-4BCPZ-RL7?
The AD7384-4BCPZ-RL7 supports a maximum throughput rate of 4 MSPS per channel with true simultaneous sampling across all four analog inputs. This rate is achieved using the standard SPI interface in 4-wire mode with minimum tCYC = 250 ns between conversions, as specified in the Rev. A datasheet under Table 5 timing parameters.
Does the AD7384-4BCPZ-RL7 require an external reference voltage?
No, the AD7384-4BCPZ-RL7 includes a buffered internal 2.5 V reference. However, it also supports external reference voltages from 2.5 V to 3.3 V applied to the REFIO pin. Selection between internal and external reference is controlled by the REFSEL bit in the CONFIGURATION1 register, and decoupling capacitors are required for both configurations.
How does the oversampling feature improve performance in the AD7384-4BCPZ-RL7?
The AD7384-4BCPZ-RL7's on-chip oversampling block performs digital averaging (normal or rolling mode) to increase effective resolution by up to 2 bits and improve SNR. At OSR = 8×, typical SNR rises from 83.5 dB to 91.3 dB, enhancing dynamic range for low-bandwidth applications like temperature monitoring or slow-varying sensor signals without external processing.
What is the function of the SDOD/ALERT pin on the AD7384-4BCPZ-RL7?
The SDOD/ALERT pin (Pin 24) is multifunctional: it operates either as Serial Data Output D for accessing the fourth channel's conversion result or as an active-low ALERT indicator. When configured as ALERT, it asserts low when any channel's result exceeds user-defined high/low thresholds stored in ALERT_HIGH_THRESHOLD and ALERT_LOW_THRESHOLD registers.
What package type and thermal characteristics does the AD7384-4BCPZ-RL7 use?
The AD7384-4BCPZ-RL7 uses a 24-lead, 4 mm × 4 mm LFCSP (CP-24-251) package with exposed pad. Its thermal resistance is θJA = 48.4°C/W (natural convection, JEDEC 2S2P board) and θJC = 0.43°C/W, enabling reliable operation at full throughput up to +125°C ambient when the EPAD is properly soldered to a thermal pad on the PCB.
AD7384-4BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-UFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 4M
- Number of Inputs:
- 4
- Input Type:
- Pseudo-Differential
- Data Interface:
- Serial, SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:4
- Number of A/D Converters:
- 4
- 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:
- 24-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7384-4BCPZ-RL7 FAQ
1.How can I place an order for AD7384-4BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7384-4BCPZ-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 AD7384-4BCPZ-RL7 reliable?
The price and inventory of AD7384-4BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7384-4BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7384-4BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7384-4BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7384-4BCPZ-RL7?
AD7384-4BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7384-4BCPZ-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 AD7384-4BCPZ-RL7?
For technical support, including AD7384-4BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7384-4BCPZ-RL7 requirements.
6.How does Aetrix verify that AD7384-4BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7384-4BCPZ-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 AD7384-4BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7384-4BCPZ-RL7?
All AD7384-4BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7384-4BCPZ-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 AD7384-4BCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD7384-4BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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