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Analog Devices Inc. AD7388-4BCPZ
- Part No.:
- AD7388-4BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-UFQFN Exposed Pad, CSP
- Datasheet:
-
AD7388-4BCPZ.pdf
- Description:
- 3MSPS 12-BIT QUAD SINGLE ENDED S
- Quantity:
- Payment:
- Shipping:
Inventory:4,852
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Product details
Overview
AD7388-4BCPZ from Analog Devices is a 12-bit, quad, simultaneous-sampling SAR ADC with single-ended analog inputs, 4 MSPS throughput, 73.7 dB typical SNR at 3.3 V reference, ±0.2 LSB typical INL, and operation from −40°C to +125°C - used in motor current sensing and traveling wave fault detection systems requiring synchronized multi-channel acquisition.
For engineers reviewing the AD7388-4BCPZ datasheet, AD7388-4BCPZ pinout, AD7388-4BCPZ application, or AD7388-4BCPZ equivalent, key selection criteria include simultaneous 4-channel sampling capability, oversampling-enabled dynamic range enhancement (up to 80 dB), internal 2.5 V reference with 10 ppm/°C max drift, LFCSP-24 package compatibility, and ALERT output for out-of-range monitoring.
Technical Context
The AD7388-4BCPZ implements four independent successive approximation register (SAR) cores with shared control logic and a configurable serial interface supporting 1-wire, 2-wire, or 4-wire readout modes. Each ADC accepts 0 V to VREF single-ended inputs and samples on the falling edge of CS with 190 ns conversion time and 110 ns acquire time.
It integrates an on-chip 2.5 V bandgap reference (10 ppm/°C max TC), oversampling block enabling rolling or normal averaging (OSR up to 8×), and ALERT output driven low when any channel exceeds programmable high/low thresholds - all operating from 3.0–3.6 V VCC and 1.65–3.6 V VLOGIC supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - defines quantization step size of 244 µV at 3.3 V full-scale, enabling precise current/voltage digitization in motor control feedback loops. |
| Throughput Rate | 4 MSPS per channel - supports real-time closed-loop control at ≤250 ns inter-conversion interval for all four channels simultaneously. |
| SNR (typ) | 73.7 dB at VREF = 3.3 V - corresponds to ~12.3 effective bits, sufficient for high-fidelity signal capture in EDFA and demodulation applications. |
| INL (typ) | ±0.2 LSB - ensures monotonicity and minimal code-to-code nonlinearity across full temperature range, critical for accurate position feedback. |
| Oversampling Support | OSR up to 8× with 2-bit resolution boost - increases dynamic range to 80 dB and reduces SCLK speed requirements by factor of √8 ≈ 2.8. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and harsh-environment power electronics. |
| Reference | Internal 2.5 V ±5 mV (25°C), 10 ppm/°C max drift - eliminates external reference component count while maintaining stability over temperature. |
Pinout & Package
AD7388-4BCPZ is housed in a 24-lead lead frame chip scale package (LFCSP, CP-24-251), 4 mm × 4 mm × 0.85 mm, with exposed thermal pad requiring GND connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,5,14,16) | Ground reference | Four dedicated ground pins reduce return path impedance and improve noise immunity across analog and digital domains. |
| VLOGIC (Pin 2) | Logic supply input | Independent 1.65–3.6 V interface supply enables direct connection to 1.8 V/2.5 V/3.3 V controllers without level shifters. |
| REGCAP (Pin 3) | Internal regulator decoupling | 1 µF capacitor stabilizes 1.9 V internal LDO output powering core logic - mandatory for stable timing and low jitter. |
| VCC (Pin 4) | Analog/digital power supply | 3.0–3.6 V main supply powers SAR cores, reference, and interface; requires local 1 µF decoupling to minimize switching noise. |
| AINA0/AINA1 (Pins 12–13) | ADC A analog inputs | Single-ended pair for Channel A; multiplexed internally - supports differential measurement via external circuitry if needed. |
| REFIO (Pin 17) | Reference I/O | Configurable as 2.5 V reference output or 2.5–3.3 V external reference input - REFSEL bit selects mode after power-up sequencing. |
| CS (Pin 18) | Chip select / conversion trigger | Active-low signal initiates simultaneous sampling on all four ADCs and frames serial data transfers - aperture delay is 2 ns. |
| SDOA–SDOD/ALERT (Pins 19–24) | Data outputs / alert indicator | Four dedicated SDO pins enable parallel readout; SDOD doubles as ALERT - asserted low when any result exceeds threshold registers. |
Key Features
| Feature | Design Value |
|---|---|
| Quad simultaneous sampling | Four independent SAR cores sample all channels at identical timestamps - eliminates phase skew critical for in-phase/quadrature demodulation. |
| Oversampling with resolution boost | Rolling average OSR=8× delivers 80 dB dynamic range and effectively adds 2 bits of resolution - reduces post-processing filtering burden. |
| Out-of-range ALERT output | Dedicated SDOD pin asserts low within 220 ns of CS falling edge when any channel exceeds user-defined thresholds - enables real-time fault response. |
| Wide temperature grade | Specified from −40°C to +125°C with full parametric validation - supports deployment in motor drives, traction inverters, and industrial PLCs. |
| Low-latency serial interface | Supports 4-wire mode for fastest readout (≤190 ns latency) or 1-wire mode for reduced pin count - compatible with 1.8 V/2.5 V/3.3 V logic levels. |
Applications
| Motor Control Current Sense | Traveling Wave Fault Detection |
|---|---|
Use Scenario: Real-time sampling of three-phase motor currents and DC bus voltage in servo drives and inverters. IC Role / Device Role / Timing Role: Simultaneous 4-channel acquisition captures synchronized current/voltage snapshots for vector control and overcurrent protection. Use Value: 4 MSPS throughput and ±0.2 LSB INL ensure accurate torque estimation and fast fault detection within <1 µs window. |
Use Scenario: High-speed transient capture along transmission lines to identify fault location using traveling wave propagation time. IC Role / Device Role / Timing Role: Quad ADC digitizes four sensor outputs (voltage/current/ground potential) with matched aperture delay (310 ps max). Use Value: Simultaneity and 24 MHz input bandwidth enable sub-meter fault localization accuracy in HV grid protection relays. |
| Erbium-Doped Fiber Amplifier (EDFA) | In-Phase and Quadrature Demodulation |
Use Scenario: Monitoring pump laser bias current, photodiode feedback, and temperature sensors in optical amplifier modules. IC Role / Device Role / Timing Role: Single-ended 12-bit digitization of four analog control/monitoring signals with internal 2.5 V reference. Use Value: Integrated reference and −40°C to +125°C operation eliminate external components and support uncooled telecom chassis designs. |
Use Scenario: Baseband I/Q signal acquisition in software-defined radio receivers and broadband test equipment. IC Role / Device Role / Timing Role: Simultaneous sampling of in-phase (I), quadrature (Q), and two auxiliary signals (e.g., LO monitor, power detector). Use Value: Channel-to-channel isolation >120 dB and aperture jitter <20 ps preserve EVM and ACLR performance in RF demodulation paths. |
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 |
|---|---|---|---|
| AD7387-4BCPZ | 14-bit resolution, 82.4 dB SNR, ±1 LSB INL, same package and pinout | Better precision for medium-speed data acquisition where 12-bit resolution is insufficient | Select when higher dynamic range and lower INL are required without changing PCB layout. |
| AD7386-4BCPZ | 16-bit resolution, 84.7 dB SNR, ±4 LSB INL, same package and pinout | Higher resolution for precision instrumentation and metrology-grade measurements | Choose when 16-bit accuracy justifies increased cost and slightly higher power consumption (191 mW vs. 165 mW). |
Compared with AD7387-4BCPZ and AD7386-4BCPZ, the AD7388-4BCPZ provides optimal balance of speed, power efficiency (165 mW), and cost for industrial motor control and fault detection - trading resolution for lower latency and smaller code memory footprint in embedded firmware.
Availability
AD7388-4BCPZ is available at Aetrix Electronics and suitable for motor control position feedback, traveling wave fault detection, and Erbium-doped fiber amplifier (EDFA) applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7388-4BCPZ 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD738x-4 family was designed specifically for high-speed, multi-channel, synchronized data acquisition in real-time control systems - emphasizing simultaneous sampling integrity, oversampling flexibility, and robust operation in extreme environments.
FAQ
What is the maximum sampling rate of the AD7388-4BCPZ?
The AD7388-4BCPZ achieves a maximum throughput rate of 4 MSPS per channel in single-channel-pair mode, with all four ADCs sampling simultaneously. In alternating-channel mode (SEQ = 1), the effective rate per channel drops to 2 MSPS. This 4 MSPS capability is maintained across the full −40°C to +125°C operating range and enables real-time closed-loop control in high-performance motor drives and power electronics where timing determinism is critical. The AD7388-4BCPZ maintains this rate with both internal and external reference configurations.
Does the AD7388-4BCPZ support oversampling, and what benefit does it provide?
Yes, the AD7388-4BCPZ includes an integrated oversampling block supporting both normal and rolling average modes with OSR up to 8×. When enabled, oversampling improves dynamic range by up to 6.5 dB (to 80 dB) and effectively adds up to 2 bits of resolution - reducing post-acquisition filtering requirements and relaxing anti-aliasing filter design. It also lowers the required SCLK frequency by a factor of √OSR, easing timing constraints on host processors. Oversampling is fully configurable via the Configuration 1 and 2 registers accessed through the serial interface of the AD7388-4BCPZ.
What is the function of the ALERT pin on the AD7388-4BCPZ?
The ALERT pin (multifunction SDOD/ALERT) on the AD7388-4BCPZ is an active-low output that asserts within 220 ns of the CS falling edge when any of the four conversion results exceeds user-programmed high or low thresholds stored in the Alert High/Low Threshold Registers. This enables immediate hardware-level fault detection without CPU polling - critical for overcurrent protection in motor drives or transient detection in power grid monitoring. ALERT deasserts within 10 ns after CS rising edge, and its behavior is fully controlled via the Alert Indication Register in the AD7388-4BCPZ.
Can the AD7388-4BCPZ operate with different logic voltage levels?
Yes, the AD7388-4BCPZ features a separate VLOGIC supply pin (Pin 2) supporting 1.65 V to 3.6 V, allowing direct interfacing with 1.8 V, 2.5 V, or 3.3 V microcontrollers and FPGAs without external level shifters. Digital inputs (CS, SCLK, SDI) accept logic thresholds scaled to VLOGIC, and outputs (SDOA–SDOD) drive to VOH = VLOGIC − 0.3 V and VOL = 0.4 V. This dual-supply architecture isolates logic noise from analog performance and simplifies system integration - a key design feature confirmed in the AD7388-4BCPZ datasheet timing and interface sections.
What package type and thermal characteristics does the AD7388-4BCPZ use?
The AD7388-4BCPZ is packaged in a 24-lead LFCSP (CP-24-251) measuring 4 mm × 4 mm × 0.85 mm with an exposed thermal pad that must be soldered to a GND plane. Its thermal resistance is θJA = 48.4°C/W (JEDEC 2S2P board) and θJC = 0.431°C/W, enabling efficient heat dissipation in high-density industrial layouts. The package supports Pb-free reflow up to 260°C and is rated for operation up to +125°C junction temperature - validated across all specifications in the AD7388-4BCPZ datasheet's thermal and absolute maximum ratings tables.
AD7388-4BCPZ 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:
- 12
- Sampling Rate (Per Second):
- 4M
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-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:
- 3V ~ 3.6V
- Features:
- Alert Function, Configurable Resolution, Multiplexed Input, Oversampling, Resolution Boost, Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 24-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7388-4BCPZ FAQ
1.How can I place an order for AD7388-4BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7388-4BCPZ 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 AD7388-4BCPZ reliable?
The price and inventory of AD7388-4BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7388-4BCPZ is usually 5 days.
3.What payment methods are accepted for AD7388-4BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7388-4BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7388-4BCPZ?
AD7388-4BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7388-4BCPZ 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 AD7388-4BCPZ?
For technical support, including AD7388-4BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7388-4BCPZ requirements.
6.How does Aetrix verify that AD7388-4BCPZ is sourced from the original manufacturer or authorized distributors?
All AD7388-4BCPZ 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 AD7388-4BCPZ meets industry standards.
7.What is the process for return or replacement of AD7388-4BCPZ?
All AD7388-4BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7388-4BCPZ, 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 AD7388-4BCPZ part is unused and in its original packaging.
Return procedure for AD7388-4BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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