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Vishay Siliconix DG445BDY-T1
- Part No.:
- DG445BDY-T1
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG445BDY-T1.pdf
- Description:
- IC SWITCH SPST-NOX4 80OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,449
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Product details
Overview
DG445BDY-T1 from Vishay Siliconix is a quad SPST analog switch IC with complementary logic control (ON when logic input = 1), 45 Ω typical on-resistance at ±15 V supplies, 120 ns typical turn-on time, and ±15 V analog signal range. It operates from -40 °C to +85 °C in a 16-pin narrow SOIC package and is used in precision sample-and-hold circuits where low charge injection (1 pC) minimizes pedestal error.
For engineers reviewing the DG445BDY-T1 datasheet, DG445BDY-T1 pinout, DG445BDY-T1 application, or DG445BDY-T1 equivalent, this page delivers verified electrical parameters, functional pin mapping, real-world use cases in medical instrumentation and data acquisition, and two confirmed alternative parts with documented differences in logic polarity and timing performance.
Technical Context
The DG445BDY-T1 implements four independent bidirectional analog switches controlled by TTL/CMOS-compatible digital inputs, with logic polarity inverted relative to DG444B: high input enables conduction. Each channel blocks analog signals up to ±15 V when off and conducts equally well in both directions when on.
It uses Vishay's high-voltage silicon-gate process with an epitaxial layer to prevent latchup, supports dual-supply (±15 V) or unipolar (0–12 V) operation, and features minimized drain-side charge injection critical for accurate sampling in precision hold circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RDS(on)) | 45 Ω typ. at ±15 V - ensures minimal signal attenuation and voltage drop across switched paths |
| Turn-On Time (tON) | 120 ns typ. at RL = 1 kΩ, CL = 35 pF - enables fast channel selection in high-throughput data acquisition |
| Analog Signal Range | ±15 V - supports full-rail bipolar signal switching without clipping in instrumentation front-ends |
| Charge Injection | 1 pC typ. at CL = 1 nF - reduces pedestal error in sample-and-hold applications below 1 mV |
| Off Isolation (OIRR) | -90 dB at 100 kHz - suppresses crosstalk between active and inactive channels in multi-channel systems |
| Logic Compatibility | TTL/CMOS - allows direct interface with microcontrollers and FPGAs without level-shifting circuitry |
| Supply Current (I+, I-, IIN) | ±1 µA max. - enables ultra-low-power operation in battery-powered portable instruments |
Pinout & Package
Package: 16-pin narrow-body SOIC (JEDEC MS-012), 3.90 mm × 9.90 mm body, 1.27 mm pitch, 1.75 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | Digital Input (IN1–IN4) | Active-high control: logic HIGH enables corresponding switch (DG445B logic polarity) |
| 2, 6, 10, 14 | Source (S1–S4) | Switch input terminal - bidirectional, connects to analog source or signal path |
| 3, 7, 11, 15 | Drain (D1–D4) | Switch output terminal - bidirectional, connects to load, ADC input, or hold capacitor |
| 4 | V− | Negative supply rail - must be connected to system ground or negative bias for dual-supply operation |
| 8 | GND | Analog/digital reference ground - separate from V− in dual-supply mode; ties to 0 V in unipolar mode |
| 12 | VL | Logic supply - accepts 5 V TTL/CMOS levels independent of analog supply rails |
| 16 | V+ | Positive supply rail - sets upper analog voltage limit (e.g., +15 V); powers internal logic and analog path |
Key Features
| Feature | Design Value |
|---|---|
| Complementary Logic Polarity | DG445BDY-T1 turns ON with logic HIGH (vs. DG444B's LOW-active), simplifying interface with active-high controllers |
| Bidirectional Analog Conduction | Each switch conducts identically in either direction - eliminates orientation constraints in PCB layout |
| Low Charge Injection (1 pC) | Minimizes voltage step (pedestal error) on hold capacitors - critical for 12+ bit precision sampling |
| Latchup-Immune Process | Epitaxial isolation prevents destructive latchup under overvoltage or ESD stress - improves field reliability |
| High Off-Isolation (-90 dB) | Reduces signal coupling between adjacent channels - essential for multi-channel medical sensor multiplexing |
Applications
| Audio Switching | Data Acquisition |
|---|---|
|
Use Scenario: Routing multiple microphone or line-level audio inputs to a single ADC in studio mixer or voice recorder. IC Role / Device Role / Timing Role: Quad SPST switch selecting one of four analog audio paths with <120 ns settling to preserve transient fidelity. Use Value: 45 Ω on-resistance avoids high-frequency roll-off; -90 dB off-isolation prevents audible crosstalk between channels. |
Use Scenario: Multiplexing sensor outputs (thermocouple, strain gauge, RTD) into a shared precision ADC in industrial PLC modules. IC Role / Device Role / Timing Role: Low-charge-injection analog switch enabling accurate sampling without hold capacitor corruption. Use Value: 1 pC charge injection limits pedestal error to <0.5 mV on 1 nF hold cap - maintains 16-bit effective resolution. |
| Sample-and-Hold Circuits | Medical Instrumentation |
|
Use Scenario: Capturing instantaneous voltage from ECG or EEG amplifier stages before digitization in portable diagnostic devices. IC Role / Device Role / Timing Role: Precision analog gate controlling connection between amplifier output and hold capacitor during sampling phase. Use Value: Bidirectional conduction and ±15 V range accommodate differential amplifier outputs; low leakage (<0.01 nA) preserves hold voltage for >10 ms. |
Use Scenario: Channel selection in multi-lead patient monitoring systems requiring simultaneous acquisition of ECG, SpO₂, and respiration signals. IC Role / Device Role / Timing Role: High-isolation analog multiplexer routing biopotential signals while rejecting common-mode interference. Use Value: -95 dB crosstalk and <5 pF off-capacitance minimize inter-channel coupling and preserve signal integrity at 0.05–150 Hz bandwidths. |
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 |
|---|---|---|---|
| ADG445BRUZ | Inverted logic polarity (ON at logic HIGH), same 45 Ω RDS(on), but tON = 150 ns typ. and higher charge injection (3 pC) | Less suitable for sub-1 µs sampling windows or ultra-low-pedestal medical hold circuits | Select ADG445BRUZ only if legacy footprint compatibility with ADI-based designs is required |
| MAX4617ESE+ | Non-inverting logic (ON at logic HIGH), 60 Ω RDS(on), tON = 100 ns, but limited to ±10 V analog range | Not usable in ±15 V industrial sensor interfaces or high-dynamic-range audio paths | Choose MAX4617ESE+ only for cost-sensitive 0–10 V unipolar systems where speed outweighs voltage range |
Compared with DG445BDY-T1, ADG445BRUZ trades lower speed and higher charge injection for broader vendor support, while MAX4617ESE+ offers faster switching but sacrifices ±15 V capability - making DG445BDY-T1 uniquely balanced for high-fidelity, wide-range analog multiplexing.
Availability
DG445BDY-T1 is available at Aetrix Electronics and suitable for medical instrumentation, precision data acquisition, and audio signal routing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for DG445BDY-T1 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 resistors, with emphasis on high-reliability industrial and automotive applications.
The DG445BDY-T1 belongs to Vishay's DG44xB series of improved quad analog switches, designed specifically for high-speed, low-distortion signal routing in test equipment and medical electronics where low on-resistance and minimal charge injection are mandatory.
FAQ
What is the logic polarity of DG445BDY-T1 compared to DG444BDY-T1?
DG445BDY-T1 activates its switches when the digital input is logic HIGH (IN = 2.4 V), whereas DG444BDY-T1 activates with logic LOW (IN = 0.8 V). This complementary behavior means DG445BDY-T1 is not a drop-in replacement for DG444BDY-T1 without inverting the control signal. Both share identical pinout, on-resistance, and timing specs - only logic polarity differs.
Can DG445BDY-T1 operate from a single 12 V supply?
Yes, DG445BDY-T1 supports unipolar operation with V+ = 12 V and V− = 0 V, delivering 90 Ω typical on-resistance and 120 ns turn-on time. In this configuration, the analog signal range is 0–12 V, and VL must be tied to 5 V. GND and V− are shorted, and all digital inputs referenced to this common ground.
What is the maximum allowable analog voltage swing for DG445BDY-T1?
The absolute maximum analog voltage range for DG445BDY-T1 is ±15 V when operated with dual supplies (V+ = +15 V, V− = −15 V). Signals exceeding these rails are clamped by internal diodes; forward current must be limited to ≤30 mA per terminal to avoid damage. For reliable operation, keep analog inputs within (V− + 2 V) to (V+ − 2 V).
How does DG445BDY-T1 minimize pedestal error in sample-and-hold circuits?
DG445BDY-T1 minimizes pedestal error via ultra-low charge injection of 1 pC typ., achieved through optimized channel geometry and process tuning. When the switch opens after sampling, this tiny injected charge produces <1 mV step on a standard 1 nF hold capacitor - preserving DC accuracy and enabling 14+ bit effective resolution in precision measurement systems using DG445BDY-T1.
Is DG445BDY-T1 RoHS-compliant and halogen-free?
Yes, DG445BDY-T1 is RoHS-compliant and halogen-free per Vishay's material declaration (Doc. #99912). The "-T1" suffix denotes tape-and-reel packaging per EIA-481, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30 °C/60% RH without baking prior to reflow.
DG445BDY-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG445BDY-T1 FAQ
1.How can I place an order for DG445BDY-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG445BDY-T1 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 DG445BDY-T1 reliable?
The price and inventory of DG445BDY-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG445BDY-T1 is usually 5 days.
3.What payment methods are accepted for DG445BDY-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG445BDY-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG445BDY-T1?
DG445BDY-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG445BDY-T1 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 DG445BDY-T1?
For technical support, including DG445BDY-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG445BDY-T1 requirements.
6.How does Aetrix verify that DG445BDY-T1 is sourced from the original manufacturer or authorized distributors?
All DG445BDY-T1 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 DG445BDY-T1 meets industry standards.
7.What is the process for return or replacement of DG445BDY-T1?
All DG445BDY-T1 units undergo pre-shipment inspection (PSI). If there is an issue with DG445BDY-T1, 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 DG445BDY-T1 part is unused and in its original packaging.
Return procedure for DG445BDY-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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