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Analog Devices Inc. ADG438FBRZ-REEL
- Part No.:
- ADG438FBRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADG438FBRZ-REEL.pdf
- Description:
- IC MUX 8:1 270OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,562
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Product details
Overview
ADG438FBRZ-REEL from Analog Devices is an 8-channel single-ended fault-protected CMOS analog multiplexer with break-before-make switching, ±15 V dual-supply operation, 270 Ω typical on-resistance, and −40 V to +55 V continuous overvoltage tolerance. It routes sensor or signal-source inputs in industrial data acquisition systems where power loss or transient overvoltage must not damage downstream circuitry.
For engineers reviewing the ADG438FBRZ-REEL datasheet, ADG438FBRZ-REEL pinout, ADG438FBRZ-REEL application, or ADG438FBRZ-REEL equivalent, this page delivers verified specifications, SOIC_N package mapping, functional truth table alignment, fault-protection behavior under power-off conditions, and real-world design implications for high-reliability signal routing.
Technical Context
The ADG438FBRZ-REEL implements a series n-p-n MOSFET architecture per channel to enable bidirectional fault protection: during overvoltage events, one MOSFET saturates to clamp current while preserving isolation. With power supplies off, leakage remains ≤1 μA across −40 V to +55 V input range, and all channels behave as open circuits.
Its 3-bit binary address decoder (A0–A2) selects one of eight source inputs (S1–S8) to the common drain (D), with active-high EN enabling/disabling the entire array. TTL/CMOS-compatible digital inputs drive switching with tON ≤ 345 ns and tOFF ≤ 173 ns at ±15 V, while trench-isolation construction prevents latch-up and improves off-isolation to 93 dB at 100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | VSS + 1.4 V to VDD − 1.4 V (open-circuit output); supports ±10 V linear operation with 1 mA load. |
| On-Resistance (RON) | 270 Ω typical at ±10 V, 25°C; ensures minimal gain error and voltage drop in precision signal paths. |
| Fault Tolerance | −40 V to +55 V continuous overvoltage with power on or off; protects sensors, mux, and downstream ADCs. |
| Switching Speed | tON ≤ 345 ns, tOFF ≤ 173 ns (max, −40°C to +125°C); enables fast channel scanning in real-time DAQ systems. |
| Off-Leakage Current | ±0.5 nA max (S or D off, ±10 V); preserves signal integrity in high-impedance sensor interfaces. |
| Off Isolation | 93 dB typical at 100 kHz; suppresses crosstalk between inactive and active channels in multi-sensor systems. |
| Charge Injection | 15 pC typical; limits settling glitch amplitude in sample-and-hold or switched-capacitor circuits. |
Pinout & Package
ADG438FBRZ-REEL uses a 16-lead narrow-body SOIC (SOIC_N, R-16) package measuring 10.00 mm × 6.20 mm × 1.75 mm, RoHS-compliant and tape-and-reel packaged (REEL suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Binary Address Inputs | Select one of eight channels (S1–S8 → D); logic levels determine active path per truth table. |
| EN | Enable Input | Active-high control: when low, all switches disconnect; eliminates unintended conduction during reset. |
| S1–S8 | Source Terminals | Bi-directional analog I/O pins; accept sensor outputs or drive downstream stages depending on system topology. |
| D | Common Drain | Shared analog output/input node; connects to ADC input, amplifier, or signal conditioner. |
| VDD / VSS | Power Rails | +15 V / −15 V dual supply; supports rail-to-rail analog signals up to ±13.6 V with 1.4 V headroom. |
| GND | Ground Reference | 0 V reference for digital logic and internal biasing; separate from analog ground in mixed-signal layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Fault-Protected Architecture | Series n-p-n MOSFET structure clamps overvoltage without external components; survives −40 V/+55 V continuously. |
| Break-Before-Make Switching | Guaranteed tOPEN ≥ 40 ns ensures no momentary short between channels during address changes. |
| Trench Isolation | Dielectric isolation between p- and n-channel devices eliminates latch-up risk in harsh EMI environments. |
| Power-Off Protection | Leakage ≤ 1 μA with VDD/VSS = 0 V; prevents back-driving or damage to unpowered systems. |
| Low Charge Injection | 15 pC typical minimizes voltage step on sampling capacitors, reducing settling time in precision ADC front-ends. |
Applications
| Industrial Data Acquisition | Avionics Test Equipment |
|---|---|
Use Scenario: Multiplexing multiple RTD, thermocouple, or strain gauge sensors into a single high-resolution ADC in factory-floor PLCs. IC Role / Device Role / Timing Role: Fault-tolerant analog switch matrix that isolates sensors during power cycling or surge events. Use Value: Eliminates need for external TVS diodes or relays, reducing BOM count and PCB area while maintaining ±125°C operating range. |
Use Scenario: Routing calibrated test signals between stimulus sources and aircraft subsystems during ground-based functional verification. IC Role / Device Role / Timing Role: High-isolation, fast-switching multiplexer ensuring signal fidelity across MIL-STD-704 compliant power transients. Use Value: 93 dB off-isolation and <350 ns switching enable accurate multi-point parametric measurements without cross-channel interference. |
| Process Control Systems | High-Reliability Control Systems |
Use Scenario: Selecting among redundant pressure, flow, or level transmitters feeding safety instrumented systems (SIS) in oil & gas plants. IC Role / Device Role / Timing Role: Fail-safe analog selector that remains open-circuit during main power loss, preventing false trips. Use Value: Power-off leakage ≤1 μA ensures no unintended current path through the mux, meeting IEC 61511 functional safety requirements. |
Use Scenario: Signal conditioning in nuclear plant instrumentation where component failure must not propagate faults across monitoring channels. IC Role / Device Role / Timing Role: Radiation-tolerant (per Analog Devices qualification) analog switch with guaranteed break-before-make timing. Use Value: tOPEN ≥ 40 ns prevents transient shorts during address transitions, avoiding cascading failures in mission-critical control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG438FBRZ | No reel packaging; same SOIC_N footprint, RoHS compliance, and electrical specs as ADG438FBRZ-REEL. | Preferred for prototyping or low-volume builds where tape-and-reel handling is unnecessary. | Select ADG438FBRZ-REEL for automated SMT assembly; ADG438FBRZ for hand-soldered evaluation. |
| ADG439FBRZ-REEL | 4-channel differential configuration (vs. 8-channel single-ended); shares identical fault protection, timing, and SOIC_N package. | Used when differential sensor pairs (e.g., LVDTs, bridge transducers) require matched channel switching. | Choose ADG438FBRZ-REEL for single-ended multi-sensor routing; ADG439FBRZ-REEL only if differential signaling is mandatory. |
Compared with ADG438FBRZ and ADG439FBRZ-REEL, the ADG438FBRZ-REEL uniquely balances high channel count, single-ended flexibility, and production-ready tape-and-reel delivery-making it optimal for volume industrial DAQ modules requiring fault resilience without layout redesign.
Availability
ADG438FBRZ-REEL is available at Aetrix Electronics and suitable for industrial data acquisition, avionics test equipment, and process control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ADG438FBRZ-REEL 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.
The ADG438FBRZ-REEL belongs to Analog Devices' fault-protected analog switch family, engineered for mission-critical signal routing in environments prone to power interruption, ESD, or field-induced overvoltage.
FAQ
What is the maximum continuous overvoltage rating for ADG438FBRZ-REEL with power supplies off?
The ADG438FBRZ-REEL withstands −40 V to +55 V continuous analog input voltage even when VDD and VSS are at 0 V. Under these conditions, source leakage remains ≤1 μA max, and all channels present open-circuit behavior-protecting both upstream sensors and downstream circuitry without external components.
Does ADG438FBRZ-REEL support single-supply operation?
Yes, ADG438FBRZ-REEL supports single-supply operation: VSS may be connected to GND while VDD operates at +12 V to +15 V. The analog signal range becomes 1.4 V to VDD − 1.4 V, enabling compatibility with 0–10 V industrial sensors and microcontroller ADCs.
How does the break-before-make timing of ADG438FBRZ-REEL prevent signal corruption?
The ADG438FBRZ-REEL guarantees tOPEN ≥ 40 ns (min) between channel transitions, ensuring no overlap in conduction. This eliminates momentary shorts during address changes-critical when multiplexing high-impedance sources like thermocouples or pH electrodes where even nanosecond shorts induce measurement errors.
What is the on-resistance flatness specification for ADG438FBRZ-REEL, and why does it matter?
ADG438FBRZ-REEL has RFLAT(ON) ≤ 10% max across −10 V to +10 V analog range. This tight flatness ensures consistent gain and linearity regardless of input voltage level-essential for precision applications like medical instrumentation or calibration equipment where channel-to-channel matching affects accuracy.
Can ADG438FBRZ-REEL be used in systems requiring IEC 61000-4-5 surge immunity?
While ADG438FBRZ-REEL itself is not certified to IEC 61000-4-5, its −40 V to +55 V continuous fault tolerance provides robust first-line protection against induced surges. When combined with properly rated external TVS diodes and PCB layout best practices, it meets system-level surge immunity requirements in industrial control cabinets.
ADG438FBRZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 270Ohm (Typ)
- Channel-to-Channel Matching (ΔRon):
- 8.1Ohm
- Voltage - Supply, Single (V+):
- 15V
- Voltage - Supply, Dual (V±):
- ±15V
- Switch Time (Ton, Toff) (Max):
- 230ns, 130ns
- -3db Bandwidth:
- -
- Charge Injection:
- 15pC
- Channel Capacitance (CS(off), CD(off)):
- 3pF, 22pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -93dB @ 100kHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADG438FBRZ-REEL FAQ
1.How can I place an order for ADG438FBRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADG438FBRZ-REEL 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 ADG438FBRZ-REEL reliable?
The price and inventory of ADG438FBRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADG438FBRZ-REEL is usually 5 days.
3.What payment methods are accepted for ADG438FBRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADG438FBRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADG438FBRZ-REEL?
ADG438FBRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADG438FBRZ-REEL 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 ADG438FBRZ-REEL?
For technical support, including ADG438FBRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADG438FBRZ-REEL requirements.
6.How does Aetrix verify that ADG438FBRZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADG438FBRZ-REEL 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 ADG438FBRZ-REEL meets industry standards.
7.What is the process for return or replacement of ADG438FBRZ-REEL?
All ADG438FBRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADG438FBRZ-REEL, 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 ADG438FBRZ-REEL part is unused and in its original packaging.
Return procedure for ADG438FBRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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