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Vishay Siliconix DG445BDJ
- Part No.:
- DG445BDJ
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
DG445BDJ.pdf
- Description:
- IC SWITCH SPST-NOX4 80OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,328
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Product details
Overview
DG445BDJ from Vishay Siliconix is a quad SPST analog switch IC designed for bidirectional signal routing in precision analog systems. It features 45 Ω typical on-resistance, 120 ns typical turn-on time (with unipolar 12 V supply), and TTL/CMOS-compatible logic control. The device operates with dual ±15 V or single 12 V supplies and is used in sample-and-hold circuits where low charge injection (4 pC) minimizes pedestal error.
For engineers reviewing the DG445BDJ datasheet, DG445BDJ pinout, DG445BDJ application, or DG445BDJ equivalent, key selection criteria include guaranteed off-isolation (–90 dB at 100 kHz), channel-to-channel crosstalk (–95 dB), and operation across –40 °C to +85 °C in 16-pin plastic DIP packaging.
Technical Context
The DG445BDJ implements four independent SPST switches with complementary logic behavior versus DG444B: logic high enables conduction (ON), logic low disables (OFF). Each switch conducts equally well in both directions when ON and blocks analog signals up to ±15 V when OFF.
It uses Vishay Siliconix's high-voltage silicon-gate process with an epitaxial layer to prevent latchup. Charge injection is minimized at the drain terminal-critical for accurate sampling in precision data acquisition systems using external hold capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 45 Ω typ. (±15 V supplies); ensures minimal signal attenuation and gain error in precision amplifier gain-switching networks. |
| Turn-On Time | 120 ns typ. (12 V unipolar supply); supports >1 MHz switching rates in automated test equipment scan paths. |
| Charge Injection | 4 pC max. (unipolar 12 V); limits voltage step error on 1 nF hold capacitors to <4 mV-enabling 12-bit+ sample-and-hold accuracy. |
| Off Isolation | –90 dB at 100 kHz; suppresses coupling between active and inactive channels in multi-channel audio routing. |
| Crosstalk | –95 dB (channel-to-channel); maintains signal integrity in dense PCB layouts with shared ground planes. |
| Analog Signal Range | ±15 V (dual supply) or 0–12 V (single supply); accommodates industrial sensor outputs and medical front-end amplifiers. |
| Logic Compatibility | TTL/CMOS inputs (0.8 V low / 2.4 V high); interfaces directly with FPGA I/O banks and microcontroller GPIO without level shifters. |
Pinout & Package
Package: 16-pin plastic DIP (JEDEC MS-012), 0.300" wide body, lead pitch 0.100", RoHS-compliant (DG445BDJ-E3 variant available).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 15, 16 | IN1–IN4 (digital control inputs) | Active-high logic inputs; INx = HIGH enables corresponding switch; inverted truth table vs. DG444B. |
| 3, 4, 13, 14 | D1–D4 (drain terminals) | Analog output nodes; low-capacitance (5 pF off) and low charge injection enable clean signal routing to ADCs or buffers. |
| 5, 6, 11, 12 | S1–S4 (source terminals) | Analog input nodes; symmetrical conduction allows bidirectional signal flow (e.g., sensor ↔ amplifier). |
| 7 | V− | Negative supply rail; must be ≥ –15 V; clamps analog inputs exceeding V− via internal diodes (max 30 mA forward current). |
| 8 | V+ | Positive supply rail; must be ≤ +15 V; defines upper analog signal limit and powers internal switch driver circuitry. |
| 9 | GND | Digital ground reference; separate from analog ground in mixed-signal designs to avoid noise coupling into sensitive analog paths. |
| 10 | VL | Logic supply rail; accepts 4.5–5.5 V; isolates digital switching noise from analog core; decoupling capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| Low on-resistance matching | ≤5 Ω max. mismatch between channels ensures consistent gain scaling in programmable-gain amplifier applications. |
| High off-isolation | –90 dB at 100 kHz enables simultaneous multi-channel signal conditioning without inter-channel interference. |
| Low power consumption | 1 µA max. supply current per rail reduces thermal drift and simplifies power budgeting in battery-powered instrumentation. |
| Latchup immunity | Epitaxial isolation layer prevents destructive latchup under overvoltage transients common in industrial environments. |
| Wide supply range | Supports ±5 V to ±20 V dual supplies or 5–15 V single supplies-flexible integration into legacy and new analog subsystems. |
Applications
| Audio Switching | Data Acquisition |
|---|---|
|
Use Scenario: Routing line-level stereo signals between multiple codecs, DACs, or headphone amplifiers in professional audio mixers. IC Role / Device Role / Timing Role: Quad SPST switch providing channel-selectable signal path isolation with <–95 dB crosstalk. Use Value: Prevents audible "bleed" between channels during mute/unmute transitions while preserving wideband frequency response (20 Hz–20 kHz). |
Use Scenario: Multiplexing sensor outputs (thermocouples, strain gauges) into a shared 16-bit SAR ADC in environmental monitoring systems. IC Role / Device Role / Timing Role: Precision analog switch enabling sequential sampling with minimal settling error and charge kickback. Use Value: 4 pC charge injection and 45 Ω RDS(on) ensure <0.01% gain error and <1 LSB settling for 16-bit resolution at 100 kSPS. |
| Sample-and-Hold Circuits | Medical Instrumentation |
|
Use Scenario: Capturing transient ECG waveforms with sub-millisecond timing fidelity in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-charge-injection switch controlling connection between front-end amplifier and hold capacitor. Use Value: 4 pC injection limits pedestal error to <4 mV on 1 nF hold capacitors-preserving baseline stability for accurate ST-segment analysis. |
Use Scenario: Isolating patient-connected EEG electrode inputs from high-speed digitization circuitry in neurodiagnostic equipment. IC Role / Device Role / Timing Role: Medical-grade analog switch providing galvanic isolation and leakage-limited signal routing (±0.01 nA off-leakage). Use Value: Ultra-low off-leakage (<0.01 nA) and ±15 V breakdown prevent hazardous currents and meet IEC 60601-1 creepage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617ESE+ | Higher on-resistance (60 Ω typ.), lower off-isolation (–75 dB), same 16-pin SOIC package but not DIP-compatible. | Less suitable for precision sample-and-hold due to higher charge injection (10 pC) and leakage (±0.1 nA). | Select MAX4617ESE+ only if SOIC footprint and lower cost outweigh need for <5 pC charge injection. |
| ADG1419BRUZ | Lower on-resistance (2.5 Ω typ.), higher supply voltage (±20 V), but requires 3.3 V logic and lacks VL pin separation. | Better for high-precision, low-distortion applications but incompatible with 5 V TTL control and dual-rail logic isolation. | Choose ADG1419BRUZ when ultra-low RDS(on) and extended voltage range justify redesign for 3.3 V logic interface. |
Compared with MAX4617ESE+ and ADG1419BRUZ, the DG445BDJ uniquely balances 45 Ω on-resistance, 4 pC charge injection, and independent VL rail-all in a through-hole DIP package ideal for prototyping, medical isolation, and legacy system upgrades.
Availability
DG445BDJ is available at Aetrix Electronics and suitable for medical instrumentation, automated test equipment, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG445BDJ 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
Vishay Siliconix is a global semiconductor manufacturer specializing in discrete MOSFETs, analog switches, and precision passive components with emphasis on reliability and high-voltage performance.
The DG445BDJ belongs to Vishay's high-speed analog switch product line, engineered for low distortion, low leakage, and robust operation in demanding industrial and medical signal-path applications.
FAQ
What is the logic polarity of DG445BDJ compared to DG444BDJ?
The DG445BDJ has active-high logic control: a logic HIGH (≥2.4 V) on INx turns the corresponding switch ON, while a logic LOW (≤0.8 V) turns it OFF. This is the inverse of DG444BDJ, which is active-low. Both share identical analog characteristics, so swapping them requires inverting the control signal in firmware or hardware.
Can DG445BDJ operate with a single 5 V supply?
No-DG445BDJ requires either dual supplies (e.g., ±15 V, ±12 V, or ±5 V) or a unipolar supply with V+ ≥ 5 V and V− = 0 V (e.g., V+ = 12 V, V− = 0 V). A 5 V-only supply violates the minimum V+–V− differential needed for full analog swing and risks exceeding absolute maximum ratings on the analog pins.
What is the maximum analog signal voltage supported by DG445BDJ?
With ±15 V supplies, DG445BDJ supports analog signals from –15 V to +15 V. With 12 V single supply (V+ = 12 V, V− = 0 V), the usable analog range is 0 V to 12 V. Signals beyond these rails are clamped by internal diodes; forward current must be limited to 30 mA to avoid damage.
Does DG445BDJ require external bypass capacitors?
Yes-DG445BDJ requires a 0.1 µF ceramic capacitor between VL and GND, and separate 0.1 µF + 10 µF (tantalum) capacitors between V+ and GND and between V− and GND. These minimize supply noise coupling into analog paths and ensure stable switching performance per Figure 1 in the datasheet.
Is DG445BDJ RoHS-compliant and halogen-free?
Yes-the DG445BDJ-E3 variant is RoHS-compliant and halogen-free per Vishay specification 99912. Standard DG445BDJ (non-E3) meets RoHS but may contain brominated flame retardants; for full compliance, specify DG445BDJ-E3 or verify material declaration with Vishay's PPAP documentation.
DG445BDJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 80Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 13V ~ 36V
- Voltage - Supply, Dual (V±):
- ±7V ~ 22V
- Switch Time (Ton, Toff) (Max):
- 300ns, 200ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF, 5pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -95dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
DG445BDJ FAQ
1.How can I place an order for DG445BDJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG445BDJ 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 DG445BDJ reliable?
The price and inventory of DG445BDJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG445BDJ is usually 5 days.
3.What payment methods are accepted for DG445BDJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG445BDJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG445BDJ?
DG445BDJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG445BDJ 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 DG445BDJ?
For technical support, including DG445BDJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG445BDJ requirements.
6.How does Aetrix verify that DG445BDJ is sourced from the original manufacturer or authorized distributors?
All DG445BDJ 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 DG445BDJ meets industry standards.
7.What is the process for return or replacement of DG445BDJ?
All DG445BDJ units undergo pre-shipment inspection (PSI). If there is an issue with DG445BDJ, 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 DG445BDJ part is unused and in its original packaging.
Return procedure for DG445BDJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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