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Vishay Siliconix DG445BDN-T1-E4
- Part No.:
- DG445BDN-T1-E4
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
DG445BDN-T1-E4.pdf
- Description:
- IC SWITCH SPST-NOX4 80OHM 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,007
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Product details
Overview
DG445BDN-T1-E4 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 optimized for sample-and-hold circuits where low charge injection (4 pC typ.) minimizes pedestal error.
For engineers reviewing the DG445BDN-T1-E4 datasheet, DG445BDN-T1-E4 pinout, DG445BDN-T1-E4 application, or DG445BDN-T1-E4 equivalent, key selection criteria include guaranteed on-resistance flatness over signal range, channel-to-channel crosstalk below -95 dB, off-isolation exceeding -90 dB at 100 kHz, and QFN-16 package compatibility with high-density PCB layouts.
Technical Context
The DG445BDN-T1-E4 implements four independent, normally-open analog switches controlled by inverted logic inputs - a logic '0' enables conduction (ON), while '1' disables (OFF). Each channel supports rail-to-rail analog signal switching from -15 V to +15 V with symmetrical on-resistance and minimal voltage-dependent variation.
Its silicon-gate CMOS process includes an epitaxial layer to prevent latchup, and internal clamping diodes protect terminals against overvoltage transients up to ±2 V beyond supply rails. Charge injection is minimized at the drain terminal to preserve accuracy in sampling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 45 Ω typical (±15 V supplies); ensures <0.1% gain error in 1 kΩ load paths |
| Turn-On Time | 120 ns typical (12 V unipolar supply); enables >1 MHz multiplexed data acquisition |
| Charge Injection | 4 pC typical (unipolar 12 V); limits pedestal error to <4 mV in 1 nF hold capacitors |
| Off Isolation | -90 dB at 100 kHz; suppresses crosstalk between active and inactive channels |
| Analog Signal Range | ±15 V (dual supply) or 0–12 V (single supply); supports full-range instrumentation signals |
| Logic Compatibility | TTL/CMOS thresholds (0.8 V low / 2.4 V high); interfaces directly with FPGA and microcontroller GPIO |
| Supply Current | ±1 µA max per supply rail; enables ultra-low-power standby operation |
Pinout & Package
Package: QFN-16 (4 mm × 4 mm, 0.65 mm pitch, Variation 1), thermally enhanced with exposed thermal pad (pin 1 marked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | IN1–IN4 | Inverted logic control inputs: low = switch ON, high = OFF |
| 5, 6, 13, 14 | S1–S4 | Source terminals - bidirectional analog signal entry points |
| 7, 8, 15, 16 | D1–D4 | Drain terminals - bidirectional analog signal exit points; low charge injection design |
| 9 | V− | Negative supply rail (−15 V max); reference for negative analog swing |
| 10 | GND | Digital ground reference for logic interface and substrate bias |
| 11 | VL | Logic supply input (2.4–5.25 V); decoupled separately from analog rails |
| 12 | V+ | Positive supply rail (+15 V max); reference for positive analog swing |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports signals from V− to V+ without clipping or distortion in linear region |
| Low on-resistance flatness | ±5 Ω variation across ±10 V signal range; maintains consistent channel matching |
| Channel-to-channel crosstalk | −95 dB typical; preserves signal integrity in multi-channel multiplexing |
| Thermal shutdown protection | Epitaxial isolation prevents latchup under transient overloads or ESD events |
| Logic-level translation | VL pin accepts 2.4–5.25 V logic, enabling direct interface with 3.3 V or 5 V controllers |
Applications
| Audio Signal Routing | Data Acquisition Multiplexer |
|---|---|
|
Use Scenario: Switching between multiple microphone or line-level audio sources in professional mixing consoles. IC Role / Device Role / Timing Role: Quad SPST analog switch providing low-distortion, low-noise signal path selection with no DC offset. Use Value: 45 Ω on-resistance and −95 dB crosstalk ensure channel separation >90 dB and THD <0.005% at 1 kHz. |
Use Scenario: Multiplexing 4 sensor outputs into a shared ADC in industrial PLC modules. IC Role / Device Role / Timing Role: Precision analog switch enabling sequential sampling with minimal settling delay and hold-step error. Use Value: 120 ns tON and 4 pC charge injection allow 16-bit accurate sampling at 10 kSPS with <1 LSB pedestal error. |
| Sample-and-Hold Circuit | Medical Instrumentation Front-End |
|
Use Scenario: Capturing transient bio-potential waveforms (e.g., ECG, EEG) with high fidelity. IC Role / Device Role / Timing Role: Low-charge-injection switch isolating amplifier output from hold capacitor during sampling phase. Use Value: 4 pC typical charge injection limits voltage step to <4 mV on 1 nF hold capacitor, preserving baseline stability. |
Use Scenario: Configurable gain and signal path selection in portable ultrasound or patient monitor analog front-ends. IC Role / Device Role / Timing Role: Reliable, low-leakage analog switch enabling reconfigurable filter and amplifier topologies. Use Value: <±0.01 nA off-leakage at 85 °C ensures <1 µV drift in high-impedance sensor interfaces over 8-hour monitoring cycles. |
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 |
|---|---|---|---|
| MAX4618ESE+ | Higher on-resistance (100 Ω typ.), slower tON (200 ns), but offers fault protection and ±20 V rating | Better suited for industrial field I/O with surge exposure; less optimal for high-speed sampling | Select when overvoltage robustness outweighs speed/resistance requirements |
| ADG1414BRUZ | Lower on-resistance (1.3 Ω typ.), higher supply current (200 µA), requires 3 V logic supply only | Optimized for low-voltage, high-precision instrumentation; incompatible with 5 V logic or ±15 V analog rails | Select for battery-powered, low-noise 16-bit systems where power and resistance dominate trade-offs |
Compared with DG445BDN-T1-E4, MAX4618ESE+ trades speed and on-resistance for ruggedness, while ADG1414BRUZ delivers ultra-low RDS(on) at the cost of supply flexibility and higher quiescent power - making DG445BDN-T1-E4 the balanced choice for mixed-signal systems requiring rail-to-rail analog range, fast settling, and logic-level adaptability.
Availability
DG445BDN-T1-E4 is available at Aetrix Electronics and suitable for audio switching, data acquisition multiplexing, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG445BDN-T1-E4 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 power MOSFETs, analog switches, and precision passive components, with emphasis on high-reliability industrial and automotive applications.
The DG445B product line was developed to upgrade legacy analog switches with improved on-resistance flatness, lower charge injection, and enhanced latchup immunity - targeting high-fidelity signal routing in test equipment and medical electronics.
FAQ
What is the logic polarity of DG445BDN-T1-E4 compared to DG444BDN-T1-E4?
The DG445BDN-T1-E4 uses inverted logic control: a logic low (≤0.8 V) turns the switch ON, while a logic high (≥2.4 V) turns it OFF. In contrast, DG444BDN-T1-E4 uses non-inverted logic (low = OFF, high = ON). This difference is fundamental to the part number designation and must be accounted for in firmware and schematic design. DG445BDN-T1-E4 maintains identical electrical specs otherwise.
Can DG445BDN-T1-E4 operate with a single 5 V supply?
No - DG445BDN-T1-E4 requires either dual supplies (e.g., ±15 V) or a unipolar supply with V+ ≥ 12 V and V− tied to GND. Its absolute maximum V+ to V− rating is 44 V, but the analog signal range collapses to 0–12 V under unipolar operation. A 5 V-only supply cannot support its specified ±15 V analog range or meet minimum V+ requirements for proper channel conduction.
Is the thermal pad on the QFN-16 package of DG445BDN-T1-E4 electrically connected?
Yes - the exposed thermal pad on the DG445BDN-T1-E4 QFN-16 package is internally connected to V−. It must be soldered to a PCB copper pour tied to the V− net for optimal thermal performance and EMI suppression. Leaving it floating or connecting it to GND violates the internal biasing scheme and may cause latchup or increased leakage.
What is the maximum allowable analog signal voltage when using VL = 3.3 V?
VL voltage does not limit the analog signal range. DG445BDN-T1-E4 supports analog signals from V− to V+, regardless of VL (which can be 2.4–5.25 V). With V+ = +15 V and V− = −15 V, the full ±15 V analog range remains valid even if VL = 3.3 V. However, logic inputs must still meet TTL/CMOS thresholds relative to VL.
Does DG445BDN-T1-E4 require external pull-up or pull-down resistors on INx pins?
No - DG445BDN-T1-E4 has no internal pull resistors on INx pins and exhibits <1 µA leakage at VIN = 0.8 V or 2.4 V. External termination is required to ensure defined logic states during power-up, reset, or high-impedance controller modes. A 10 kΩ pull-down resistor is recommended to guarantee reliable OFF-state default behavior.
DG445BDN-T1-E4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
DG445BDN-T1-E4 FAQ
1.How can I place an order for DG445BDN-T1-E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG445BDN-T1-E4 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 DG445BDN-T1-E4 reliable?
The price and inventory of DG445BDN-T1-E4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG445BDN-T1-E4 is usually 5 days.
3.What payment methods are accepted for DG445BDN-T1-E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG445BDN-T1-E4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG445BDN-T1-E4?
DG445BDN-T1-E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG445BDN-T1-E4 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 DG445BDN-T1-E4?
For technical support, including DG445BDN-T1-E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG445BDN-T1-E4 requirements.
6.How does Aetrix verify that DG445BDN-T1-E4 is sourced from the original manufacturer or authorized distributors?
All DG445BDN-T1-E4 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 DG445BDN-T1-E4 meets industry standards.
7.What is the process for return or replacement of DG445BDN-T1-E4?
All DG445BDN-T1-E4 units undergo pre-shipment inspection (PSI). If there is an issue with DG445BDN-T1-E4, 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 DG445BDN-T1-E4 part is unused and in its original packaging.
Return procedure for DG445BDN-T1-E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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