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Analog Devices Inc. ADUM7640CRQZ-RL7
- Part No.:
- ADUM7640CRQZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADUM7640CRQZ-RL7.pdf
- Description:
- DGTL ISO 1000VRMS 6CH GP 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,912
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Product details
Overview
ADUM7640CRQZ-RL7 from Analog Devices is a six-channel, 1 kVRMS digital isolator in a 20-lead QSOP package, supporting bidirectional communication at up to 25 Mbps (NRZ) with 3.0–5.5 V dual-supply operation. It provides functional isolation for SPI interfaces and industrial field buses, featuring low pulse width distortion (<6 ns for C grade), high common-mode transient immunity (>15 kV/µs), and default high-output logic state during power loss.
For engineers reviewing the ADUM7640CRQZ-RL7 datasheet, ADUM7640CRQZ-RL7 pinout, ADUM7640CRQZ-RL7 application, or ADUM7640CRQZ-RL7 equivalent, this device serves as a space-optimized, low-power alternative to higher-voltage isolators where only 1 kVRMS functional isolation is required-particularly in mixed-voltage (3.3 V/5 V) data converter and transceiver isolation designs.
Technical Context
The ADUM7640CRQZ-RL7 implements iCoupler® transformer-based isolation with six independent unidirectional channels-all inputs on Side 1 (Pins 3–9), all outputs on Side 2 (Pins 12–18). Its architecture supports asymmetric supply configurations (e.g., VDD1 = 5 V, VDD2 = 3.3 V), enabling level translation without external logic. Each channel includes a glitch filter and maintains DC correctness across temperature (−40°C to +105°C).
Propagation delay skew is specified at ≤14 ns (C grade) for codirectional channels and ≤12 ns for opposing-directional channels, ensuring tight timing alignment in synchronous interfaces like SPI clock/data pairs. The device uses internal refresh circuitry (600 kHz typical) to retain DC logic states during static input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 1000 VRMS for 1 minute per UL 1577; enables functional safety compliance in industrial control systems without reinforced insulation overhead. |
| Data Rate | Up to 25 Mbps (NRZ); supports high-speed SPI clocking (e.g., ≥12.5 MHz SCLK) and RS-485 transceiver control signaling. |
| Supply Range | 3.0 V to 5.5 V per side; allows direct interfacing with 3.3 V microcontrollers and 5 V peripherals without level shifters. |
| Power Consumption | 7.8 mA/channel max at 25 Mbps (5 V); 3.8 mA/channel max at 25 Mbps (3.3 V); reduces thermal load in dense PCB layouts. |
| Pulse Width Distortion | <6 ns (C grade); preserves duty cycle integrity for clock distribution and PWM signal isolation. |
| Common-Mode Transient Immunity | >15 kV/µs; maintains signal integrity in noisy motor drive or power supply environments with fast switching noise. |
| Operating Temperature | −40°C to +105°C; qualified for extended use in industrial automation and outdoor metering applications. |
Pinout & Package
ADUM7640CRQZ-RL7 is housed in a 20-lead QSOP (Quarter Size Outline Package) with 0.65 mm lead pitch and 7.6 mm × 12.8 mm body dimensions. Side 1 (input) occupies Pins 1–10; Side 2 (output) occupies Pins 11–20. Dual VDD/GND pairs per side ensure low-noise power delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 & 7 (VDD1A/VDD1B) | Input-side supply rails | Must be externally shorted; decoupling capacitor (0.01–0.1 µF) required per rail to suppress high-frequency switching noise. |
| Pins 3–9 (VIA–VIF) | Logic inputs (Side 1) | All six inputs reside on Side 1; compatible with CMOS/LVTTL logic families across 3.3 V or 5 V operation. |
| Pins 12–18 (VOF–VOA) | Logic outputs (Side 2) | All six outputs reside on Side 2; drive strength supports 4 mA sink/source at VOH/VOL limits. |
| Pins 2,10,11,19 (GND1/GND2) | Isolated ground references | GND1 (Pins 2,10) and GND2 (Pins 11,19) must be connected to separate PCB ground planes-no shared traces allowed. |
| Pins 14 & 20 (VDD2B/VDD2A) | Output-side supply rails | Must be externally shorted; independent of VDD1 rails to maintain galvanic isolation integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Small-footprint QSOP packaging | Saves >40% board area vs. SOIC-20 alternatives-critical for compact PLC I/O modules and sensor interface cards. |
| Channel-by-channel glitch filtering | Rejects sub-100 ns noise pulses on isolated data lines, eliminating false triggering in ESD-prone industrial environments. |
| Default high output state | Ensures fail-safe behavior during power-up/power-down sequences-prevents undefined states in SPI chip-select or enable lines. |
| Mixed-voltage level translation | Supports 3.3 V MCU ↔ 5 V ADC or 5 V MCU ↔ 3.3 V FPGA interfaces without external translators or resistive dividers. |
| Low propagation delay skew | ≤14 ns codirectional skew enables simultaneous sampling of multi-bit data (e.g., 16-bit ADC parallel output) across isolated channels. |
Applications
| SPI Isolation for Data Converters | Industrial RS-485 Transceiver Interface |
|---|---|
Use Scenario: Isolating SPI bus between an ARM Cortex-M7 microcontroller (3.3 V) and a 24-bit precision ADC (5 V) in a programmable logic controller. IC Role / Device Role / Timing Role: Six-channel unidirectional isolator: three channels for MOSI/MISO/SCLK, three for ADC ready/busy/status signals. Use Value: Eliminates ground loop errors and prevents latch-up during voltage transients-maintaining ±0.0015% measurement accuracy over full temperature range. |
Use Scenario: Galvanically isolating control and status lines between a 3.3 V UART controller and a 5 V half-duplex RS-485 transceiver in a factory floor node. IC Role / Device Role / Timing Role: Provides directional separation for DE/RE control, TXD, RXD, and fault reporting signals across the isolation barrier. Use Value: Enables reliable communication at 10 Mbps while suppressing common-mode noise from adjacent VFDs-reducing packet retransmission rate by >99%. |
| Motor Drive Gate Driver Interface | Isolated Digital I/O Expansion |
Use Scenario: Isolating PWM and fault feedback signals between a 5 V FPGA-based motion controller and 3.3 V gate driver ICs in a servo amplifier. IC Role / Device Role / Timing Role: Carries three PWM channels (CH1–CH3) and three fault flags (OCP, OTP, UVLO) with matched propagation delays. Use Value: Ensures <5 ns inter-channel skew between PWM and corresponding fault signals-enabling precise dead-time management and safe shutdown response. |
Use Scenario: Adding eight isolated digital inputs/outputs to a 3.3 V industrial IoT gateway using two ADUM7640CRQZ-RL7 devices (six channels each). IC Role / Device Role / Timing Role: Provides six independently configurable GPIO channels per device, with configurable default states and glitch immunity. Use Value: Replaces discrete optocouplers and level shifters-reducing BOM count by 70% and improving long-term reliability in dusty, high-humidity environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar six-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8660BB-B-IS | 2.5 kVRMS isolation rating; higher supply current (10.2 mA/channel @25 Mbps, 5 V); different pinout (SOIC-20). | Better suited for reinforced insulation requirements (e.g., medical equipment), but consumes ~30% more power and requires PCB layout changes. | Select SI8660BB-B-IS only if regulatory certification mandates >1.5 kVRMS working voltage or if legacy SOIC-20 footprint compatibility is required. |
| ISO6760FRDWR | 6-channel, 5000 VRMS reinforced isolation; higher propagation delay (30 ns typ); supports 1.8 V–5.5 V supplies on both sides. | Targeted at high-reliability automotive and grid infrastructure applications where creepage/clearance >8 mm is mandated. | Choose ISO6760FRDWR when design requires IEC 60747-17 VDE 0884-17 certification or operation in >150°C ambient environments. |
Compared with SI8660BB-B-IS and ISO6760FRDWR, ADUM7640CRQZ-RL7 delivers optimal cost, size, and power efficiency for functional isolation in industrial automation-where 1 kVRMS meets safety standards without over-engineering.
Availability
ADUM7640CRQZ-RL7 is available at Aetrix Electronics and suitable for industrial PLCs, energy metering systems, and motor control drives requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for ADUM7640CRQZ-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 ADuM7640 family belongs to Analog Devices' iCoupler® digital isolator product line, engineered specifically for cost-sensitive, space-constrained industrial interfaces where functional isolation-not reinforced safety-is sufficient.
FAQ
What is the maximum data rate supported by ADUM7640CRQZ-RL7?
ADUM7640CRQZ-RL7 supports up to 25 Mbps in NRZ format, verified under load conditions (CL = 15 pF, CMOS levels) across its full operating temperature range (−40°C to +105°C). This enables reliable isolation of high-speed SPI clocks and RS-485 control signals without timing degradation.
Does ADUM7640CRQZ-RL7 support mixed-voltage operation?
Yes, ADUM7640CRQZ-RL7 supports independent 3.0–5.5 V supplies on each side-allowing true 3.3 V ↔ 5 V level translation. For example, VDD1 = 3.3 V and VDD2 = 5 V is fully characterized in Table 10 of the datasheet, with propagation delay and power consumption specified accordingly.
What is the default output state of ADUM7640CRQZ-RL7 during power loss?
ADUM7640CRQZ-RL7 has a default high output state on all six channels when either VDD1 or VDD2 is unpowered. As shown in Table 19 (Truth Table), outputs go high within 1.6 µs after VDDI power restoration-ensuring predictable behavior in fault-tolerant SPI and enable-line applications.
How does ADUM7640CRQZ-RL7 handle common-mode transients?
ADUM7640CRQZ-RL7 achieves >15 kV/µs common-mode transient immunity (CMTI), measured at VCM = 1000 V with 800 V transient magnitude. This performance is maintained across temperature and supply voltage variations, making it robust against fast-switching noise in motor drives and switch-mode power supplies.
Is ADUM7640CRQZ-RL7 pin-compatible with other members of the ADuM764x family?
No-ADUM7640CRQZ-RL7 has a unique pin configuration (all inputs on Side 1, all outputs on Side 2) that differs from ADUM7641/7642/7643. Pin compatibility is not guaranteed across the family; PCB layout must be validated per specific variant's pin function table (Table 20 for ADUM7640).
ADUM7640CRQZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 6/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1000Vrms
- Common Mode Transient Immunity (Min):
- 15kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 50ns, 50ns
- Pulse Width Distortion (Max):
- 6ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QSOP
ADUM7640CRQZ-RL7 FAQ
1.How can I place an order for ADUM7640CRQZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM7640CRQZ-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 ADUM7640CRQZ-RL7 reliable?
The price and inventory of ADUM7640CRQZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM7640CRQZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM7640CRQZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM7640CRQZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM7640CRQZ-RL7?
ADUM7640CRQZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM7640CRQZ-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 ADUM7640CRQZ-RL7?
For technical support, including ADUM7640CRQZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM7640CRQZ-RL7 requirements.
6.How does Aetrix verify that ADUM7640CRQZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM7640CRQZ-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 ADUM7640CRQZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM7640CRQZ-RL7?
All ADUM7640CRQZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM7640CRQZ-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 ADUM7640CRQZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM7640CRQZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM7640CRQZ-RL7 Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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