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Analog Devices Inc. AD7389-4BCPZ
- Part No.:
- AD7389-4BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-UFQFN Exposed Pad, CSP
- Datasheet:
-
AD7389-4BCPZ.pdf
- Description:
- 2MSPS 16-BIT QUAD DIFFERENTIAL S
- Quantity:
- Payment:
- Shipping:
Inventory:3,492
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Product details
Overview
AD7389-4BCPZ from Analog Devices is a 16-bit, quad, simultaneous-sampling SAR ADC with fully differential analog inputs, 2 MSPS throughput, buffered 2.5 V internal reference (10 ppm/°C), and on-chip oversampling supporting up to 2-bit resolution boost - used in motor control current sense and position feedback systems requiring precise multi-channel synchronization.
For engineers reviewing the AD7389-4BCPZ datasheet, AD7389-4BCPZ pinout, AD7389-4BCPZ application, or AD7389-4BCPZ equivalent, key selection considerations include differential input common-mode range (0.2 V to VREF − 0.2 V), channel-to-channel isolation (−126 dB), aperture delay match (46.8–145 ps), and 4 mm × 4 mm LFCSP package compatibility with high-density industrial PCB layouts.
Technical Context
The AD7389-4BCPZ integrates four independent SAR ADC cores sharing a single internal 2.5 V reference and oversampling engine, enabling synchronized acquisition across all four channels on the falling edge of CS. Its dual-capacitor DAC architecture supports low-latency conversion (190 ns) and high dynamic performance (SNR = 90.5 dB at 1 kHz).
It implements two oversampling modes - normal averaging and rolling average - delivering up to 97.9 dB SNR at OSR = 8× with RES = 1, while maintaining full 16-bit resolution without external components. The 4-wire serial interface allows simultaneous readout of all four channels at 2 MSPS, with separate VLOGIC (1.65–3.6 V) supporting mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees no missing codes and supports high-fidelity signal capture in closed-loop motor control. |
| Throughput Rate | 2 MSPS - enables real-time sampling of fast-changing currents and positions in servo drives. |
| Analog Input Type | Fully differential - rejects common-mode noise up to −76 dB at 500 kHz, critical for noisy industrial environments. |
| INL (max) | ±2.5 LSB - ensures linearity accuracy within ±0.0038% FS for precision feedback calibration. |
| SNR (typ) | 90.5 dB at 1 kHz - delivers >14.7 effective number of bits (ENOB) for high-resolution data acquisition. |
| Oversampling Support | Up to 8× rolling average - boosts dynamic range by 6.4 dB and reduces SCLK speed requirements by factor of 8. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial motor drive applications. |
| Package | 24-lead LFCSP (4 mm × 4 mm) - provides low thermal resistance (θJA = 48.4°C/W) and exposed pad for GND connection. |
Pinout & Package
AD7389-4BCPZ uses a 24-lead lead frame chip scale package (LFCSP) with an exposed pad that must be connected to GND for thermal and electrical integrity. Pin pitch is 0.5 mm; package footprint conforms to JEDEC MO-220 standard CP-24-251.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 14, 16 | GND | Ground reference for analog/digital domains; multiple pins reduce ground bounce in high-speed sampling. |
| 2 | VLOGIC | Separate logic supply (1.65–3.6 V); isolates digital interface noise from analog performance. |
| 3 | REGCAP | Decoupling node for internal regulator (1.9 V typical); requires 1 µF capacitor to GND for stable operation. |
| 4 | VCC | Analog power supply (3.0–3.6 V); decoupled with 1 µF capacitor to minimize supply-induced distortion. |
| 6–13 | AINA± to AIND± | Four fully differential analog input pairs; each accepts ±2.5 V differential swing with 0.2–2.3 V common-mode range. |
| 15 | REFCAP | Bandgap reference decoupling node (2.5 V typical); requires 0.1 µF capacitor to GND for low-noise reference stability. |
| 17 | REFOUT | Buffered 2.5 V reference output; supports external circuitry but must be decoupled with 1 µF capacitor. |
| 18 | CS | Active-low chip select; initiates conversion and frames serial data transfers on falling edge. |
| 19–23 | SDOA–SDOC | Dedicated serial data outputs for ADC A–C; enable simultaneous 4-wire readout at full 2 MSPS rate. |
| 24 | SDOD/ALERT | Multi-function pin: serial data output D or out-of-range alert indicator (active-low threshold violation flag). |
Key Features
| Feature | Design Value |
|---|---|
| Quad simultaneous sampling | Four independent SAR cores acquire and convert on same CS edge - eliminates inter-channel timing skew in phase-current sensing. |
| On-chip oversampling | Configurable normal or rolling average mode; improves SNR by up to 7.4 dB and reduces effective noise floor without external hardware. |
| Buffered internal reference | 2.5 V ±5 mV over temperature (10 ppm/°C drift); eliminates need for external reference IC and saves board space. |
| Out-of-range alert | ALERT pin asserts low when any channel exceeds user-configured thresholds - enables real-time fault detection in safety-critical drives. |
| High channel isolation | −126 dB crosstalk between channels - preserves signal integrity during simultaneous sampling of adjacent motor phases. |
| Low sampling capacitance | 5 pF hold-mode input capacitance - reduces burden on front-end amplifiers and simplifies anti-alias filter design. |
Applications
| Motor Control Position Feedback | Motor Control Current Sense |
|---|---|
|
Use Scenario: High-bandwidth rotor position tracking in PMSM and BLDC servo drives using resolver or encoder analog outputs. IC Role / Device Role / Timing Role: Simultaneous sampling of quadrature sine/cosine or Hall sensor signals with sub-150 ps aperture delay match. Use Value: Enables accurate field-oriented control (FOC) with <1 electrical degree position error at 20 kHz PWM rates. |
Use Scenario: Real-time three-phase current measurement in inverter legs using shunt resistors and isolated amplifiers. IC Role / Device Role / Timing Role: Quad differential input captures Ia, Ib, Ic, and neutral current with synchronized 2 MSPS sampling. Use Value: Supports overcurrent protection response within 1 µs and torque ripple reduction via precise current reconstruction. |
| Data Acquisition Systems | Erbium-Doped Fiber Amplifier (EDFA) |
|
Use Scenario: Multi-channel voltage/current monitoring in modular test equipment and programmable power supplies. IC Role / Device Role / Timing Role: High-accuracy, low-drift 16-bit digitization of sensor outputs with integrated reference and oversampling. Use Value: Eliminates external reference and averaging FPGA logic, reducing BOM count and calibration complexity. |
Use Scenario: Monitoring pump laser bias current, photodiode feedback, and temperature sensors in optical amplifier modules. IC Role / Device Role / Timing Role: Simultaneous sampling of four analog control loops with wide common-mode range (0.2–2.3 V). Use Value: Maintains gain stability across −40°C to +85°C operating range with <±0.0125% FS gain error match between channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad, simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7380-4BCPZ | 16-bit, 4 MSPS, no internal reference - requires external 2.5 V reference; higher power (28 mA vs. 23 mA). | Better suited for systems already using precision external references and needing maximum throughput. | Select AD7380-4BCPZ only if 4 MSPS is required and external reference infrastructure exists. |
| AD4680BCPZ-RL7 | 16-bit, dual-channel, 2 MSPS, internal reference - lacks quad channel count and simultaneous sampling capability. | Applicable where only two synchronized channels are needed, e.g., dual-axis motion control. | Choose AD4680BCPZ-RL7 only for dual-channel designs; AD7389-4BCPZ remains necessary for true quad synchronization. |
Compared with AD7380-4BCPZ, AD7389-4BCPZ trades 2 MSPS throughput for integrated reference and lower power; compared with AD4680BCPZ-RL7, it adds two extra synchronized channels and dedicated ALERT functionality for fault-aware systems.
Availability
AD7389-4BCPZ is available at Aetrix Electronics and suitable for motor control position feedback, motor control current sense, and data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for AD7389-4BCPZ 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, headquartered in Norwood, MA, with R&D centers worldwide.
The AD7389-4BCPZ belongs to Analog Devices' high-speed precision SAR ADC product line, designed specifically for industrial motor control, energy metering, and test instrumentation demanding simultaneous multi-channel acquisition with minimal latency and high DC/AC accuracy.
FAQ
What is the maximum sampling rate of the AD7389-4BCPZ?
The AD7389-4BCPZ achieves a maximum throughput rate of 2 million samples per second (2 MSPS) in normal mode with no oversampling enabled. This rate applies to all four channels simultaneously, with conversion time specified at 190 ns and tCYC (time between conversions) at 500 ns. Oversampling reduces effective throughput proportionally to the OSR setting.
Does the AD7389-4BCPZ require an external reference voltage?
No, the AD7389-4BCPZ includes a buffered 2.5 V internal voltage reference with 10 ppm/°C temperature coefficient and 7 µV rms noise. REFOUT is available for system-wide use, but external buffering is recommended if driving additional circuitry. Using the internal reference eliminates BOM cost and layout complexity associated with external references.
How does the ALERT function work on the AD7389-4BCPZ?
The ALERT function on pin 24 (SDOD/ALERT) asserts low when any of the four ADC channels exceeds user-programmable high or low thresholds stored in Alert High/Low Threshold Registers. It responds within 220 ns after CS assertion or 20 ns after internal threshold violation, enabling real-time fault detection in motor overcurrent or position error scenarios.
What are the power supply requirements for the AD7389-4BCPZ?
The AD7389-4BCPZ requires two supplies: VCC (3.0–3.6 V) for analog circuitry and VLOGIC (1.65–3.6 V) for digital interface. Typical VCC supply current is 23 mA in normal operational mode, dropping to 2 µA in shutdown. VLOGIC current is 4.1 mA during operation and 200 nA in static mode. Separate decoupling capacitors are mandatory per datasheet guidelines.
Is the AD7389-4BCPZ pin-compatible with other devices in its family?
Yes, the AD7389-4BCPZ is pin-compatible with the AD7380-4BCPZ and AD7381-4BCPZ within the same 24-lead LFCSP package. All share identical pinout, interface protocol, and timing specifications - allowing hardware reuse across 16-bit, 14-bit, and 12-bit variants while maintaining layout compatibility and firmware scalability.
AD7389-4BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-UFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 2M
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- 0:4
- Number of A/D Converters:
- 4
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 24-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7389-4BCPZ FAQ
1.How can I place an order for AD7389-4BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7389-4BCPZ 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 AD7389-4BCPZ reliable?
The price and inventory of AD7389-4BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7389-4BCPZ is usually 5 days.
3.What payment methods are accepted for AD7389-4BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7389-4BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7389-4BCPZ?
AD7389-4BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7389-4BCPZ 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 AD7389-4BCPZ?
For technical support, including AD7389-4BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7389-4BCPZ requirements.
6.How does Aetrix verify that AD7389-4BCPZ is sourced from the original manufacturer or authorized distributors?
All AD7389-4BCPZ 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 AD7389-4BCPZ meets industry standards.
7.What is the process for return or replacement of AD7389-4BCPZ?
All AD7389-4BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7389-4BCPZ, 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 AD7389-4BCPZ part is unused and in its original packaging.
Return procedure for AD7389-4BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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