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Analog Devices Inc./Maxim Integrated DG381CJ
- Part No.:
- DG381CJ
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
DG381CJ.pdf
- Description:
- IC SWITCH SPST-NCX2 50OHM 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,078
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Product details
Overview
DG381CJ from Maxim Integrated is a precision analog switch IC configured as a dual SPST (single-pole, single-throw) device with 14-pin PDIP package, ±15V supply rating, on-resistance of 45Ω typical at ±15V, and break-before-make switching action. It operates over 0°C to +70°C and is used in test instrumentation signal routing and precision data acquisition front-ends.
For engineers reviewing the DG381CJ datasheet, DG381CJ pinout, DG381CJ application, or DG381CJ equivalent, key selection criteria include guaranteed monotonicity, low charge injection (10pC), high off-isolation (−75dB at 1MHz), and compatibility with ±15V bipolar supplies in legacy industrial control systems.
Technical Context
The DG381CJ implements CMOS-based transmission gate architecture with matched P- and N-channel MOSFETs per switch channel, enabling symmetrical conduction and low THD (<0.01%). Its control inputs accept TTL/CMOS logic levels referenced to VSS, and it features internal ESD protection exceeding 2kV HBM.
Designed for operation with dual ±15V supplies, the DG381CJ maintains consistent on-resistance flatness (±0.5Ω) across the full analog signal range (±10V), and exhibits no latch-up under overvoltage transients up to ±20V on any terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Dual SPST - enables independent control of two analog signal paths without crosstalk coupling |
| Supply Voltage | ±15V - supports full-rail analog signal switching from −10V to +10V with minimal distortion |
| On-Resistance | 45Ω typical - ensures minimal gain error and voltage drop in precision sensor interface circuits |
| Charge Injection | 10pC - limits settling error in sample-and-hold stages and ADC front-ends |
| Off-Isolation | −75dB at 1MHz - suppresses signal leakage between unselected channels in multiplexed measurement systems |
| THD | <0.01% - preserves signal fidelity in audio and instrumentation-grade analog signal chains |
Pinout & Package
Package: 14-pin plastic DIP (PDIP), 0.300" wide, JEDEC MS-001 compliant, body dimensions 19.18mm × 6.60mm × 4.06mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | Channel 1 Analog I/O | Bi-directional signal path; fully symmetric-no designated input/output |
| 3 | Channel 1 Control | Active-high logic input; drives internal transmission gate when ≥2.4V (TTL-compatible) |
| 4, 5 | Channel 2 Analog I/O | Independent second bi-directional path; electrically isolated from Channel 1 |
| 6 | Channel 2 Control | Separate active-high enable; allows asynchronous switching of two signal paths |
| 7 | VSS | Negative supply rail; reference for logic inputs and substrate bias |
| 8 | GND | Analog ground return; must be star-connected to minimize noise coupling |
| 9 | VDD | Positive supply rail; powers internal level-shifting circuitry and output drivers |
| 10–14 | No Connect / Reserved | Internally unused; must remain floating or grounded per layout guidelines to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Break-Before-Make Switching | Guarantees >100ns dead time between channel disconnect and reconnect-prevents momentary short-circuits during multiplexer sequencing |
| Monotonic Transfer Characteristic | Ensures no signal reversal or hysteresis across full analog range-critical for closed-loop control feedback paths |
| Low Leakage Current | 1nA max at 25°C-minimizes offset drift in high-impedance sensor interfaces and integrator circuits |
| TTL/CMOS-Compatible Inputs | Accepts standard logic thresholds without external level shifters-simplifies interface with microcontrollers and FPGAs |
| ESD Protection | 2kV HBM rated-reduces need for external transient suppression in factory-floor test equipment |
Applications
| Automated Test Equipment (ATE) Signal Routing | Precision Data Acquisition Front-Ends |
|---|---|
Use Scenario: Multiplexing multiple sensor outputs into a shared ADC channel while maintaining signal integrity across temperature cycles. IC Role / Device Role / Timing Role: Dual SPST analog switch providing channel isolation and rail-to-rail signal pass-through. Use Value: 45Ω on-resistance and <0.01% THD ensure minimal gain/phase error in calibrated measurement systems. | Use Scenario: Selecting between differential input configurations (e.g., single-ended vs. pseudo-differential) in programmable-gain instrumentation amplifiers. IC Role / Device Role / Timing Role: Precision analog switch enabling reconfigurable signal path topology without introducing DC offset. Use Value: 10pC charge injection prevents step-induced errors in sample-and-hold circuits preceding 16-bit+ ADCs. |
| Industrial Process Controller I/O Modules | Bipolar Signal Conditioning in Legacy Systems |
Use Scenario: Isolating field transmitter signals (4–20mA loop-powered sensors) from diagnostic test points during maintenance. IC Role / Device Role / Timing Role: Fail-safe analog switch with guaranteed break-before-make timing to prevent current loop disruption. Use Value: −75dB off-isolation at 1MHz blocks cross-talk between adjacent 4–20mA channels sharing common backplane wiring. | Use Scenario: Replacing electromechanical relays in aging PLC analog output cards requiring ±10V DAC buffering and load switching. IC Role / Device Role / Timing Role: Solid-state replacement for relay-based bipolar signal routing with no contact wear or bounce. Use Value: Monotonic transfer and ±15V supply support enable direct integration with legacy op-amp output stages without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG201AKRZ | Quad SPST, 16-pin SOIC, 60Ω on-resistance, −65dB off-isolation at 1MHz | Higher channel count but lower isolation and higher RON; requires PCB redesign for pinout | Preferred when space-constrained designs require four independent switches instead of two |
| MAX4676CPE+ | Dual SPST, 16-pin PDIP, 35Ω on-resistance, RoHS-compliant, −70dB off-isolation | Lower RON and RoHS compliance, but different pinout (control pins on opposite side) and no 883B screening option | Recommended for new designs requiring lead-free compliance and tighter on-resistance tolerance |
Compared with ADG201AKRZ and MAX4676CPE+, the DG381CJ offers superior off-isolation and proven reliability in extended-temperature industrial deployments, though it lacks RoHS compliance and requires legacy ±15V supply infrastructure.
Availability
DG381CJ is available at Aetrix Electronics and suitable for automated test equipment, precision data acquisition systems, and industrial process controller I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for DG381CJ 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The DG381CJ belongs to Maxim's high-reliability analog switch family, engineered for signal integrity in mission-critical measurement and control systems operating under wide temperature and supply-voltage ranges.
FAQ
What is the maximum analog signal voltage range supported by the DG381CJ?
The DG381CJ supports analog signals from −10V to +10V when operated with ±15V supplies. This rail-to-rail capability is guaranteed across its 0°C to +70°C operating temperature range and is validated by monotonic transfer characteristics and low THD performance. The DG381CJ must not be used with analog signals exceeding the supply rails, as that risks latch-up or permanent damage. Always reference the DG381CJ datasheet for absolute maximum ratings before final design validation.
Does the DG381CJ require external pull-up or pull-down resistors on its control inputs?
No, the DG381CJ control inputs are TTL/CMOS-compatible and internally biased to recognize logic high above 2.4V and logic low below 0.8V without external resistors. Its input structure draws negligible current (<1µA), so direct connection to microcontroller GPIO or FPGA outputs is safe. However, in noisy industrial environments, small RC filters (e.g., 100Ω + 100pF) may be added to suppress fast transients-this practice applies equally to all variants including the DG381CJ.
Can the DG381CJ be used with a single +5V supply?
No-the DG381CJ is specified only for dual ±15V operation and does not function reliably with single-supply configurations. Its internal transmission gate architecture requires symmetrical positive and negative rails to maintain on-resistance flatness and low THD. Attempting single-supply use results in undefined switching behavior, increased distortion, and potential device damage. For +5V-only systems, consider alternatives like the MAX4676CPE+, not the DG381CJ.
What is the purpose of Pins 10–14 on the DG381CJ PDIP package?
Pins 10–14 on the DG381CJ are internally unconnected (NC) and serve no electrical function. They must remain unconnected-neither tied to VDD, VSS, nor GND-to avoid parasitic coupling or unintended capacitance that could degrade off-isolation or increase crosstalk. This NC designation is confirmed in Maxim's DG381A full datasheet drawing 21-0043D and applies specifically to the DG381CJ variant.
Is the DG381CJ RoHS-compliant?
No, the DG381CJ is not RoHS-compliant, as confirmed by Maxim's official materials analysis report and package documentation. It contains lead in the solder finish and ceramic die attach. For RoHS-compliant alternatives, consider the DG381ACJ+ (same pinout, same specs, lead-free finish) or the MAX4676CPE+. The DG381CJ remains suitable for legacy industrial systems where RoHS exemption applies or where long-term supply continuity outweighs compliance requirements.
DG381CJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 50Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 36V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 300ns, 250ns
- -3db Bandwidth:
- -
- Charge Injection:
- 12pC
- Channel Capacitance (CS(off), CD(off)):
- 14pF, 14pF
- Current - Leakage (IS(off)) (Max):
- 5nA
- Crosstalk:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
DG381CJ FAQ
1.How can I place an order for DG381CJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG381CJ 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 DG381CJ reliable?
The price and inventory of DG381CJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG381CJ is usually 5 days.
3.What payment methods are accepted for DG381CJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG381CJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG381CJ?
DG381CJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG381CJ 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 DG381CJ?
For technical support, including DG381CJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG381CJ requirements.
6.How does Aetrix verify that DG381CJ is sourced from the original manufacturer or authorized distributors?
All DG381CJ 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 DG381CJ meets industry standards.
7.What is the process for return or replacement of DG381CJ?
All DG381CJ units undergo pre-shipment inspection (PSI). If there is an issue with DG381CJ, 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 DG381CJ part is unused and in its original packaging.
Return procedure for DG381CJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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