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Vishay Siliconix DG309BDQ-T1
- Part No.:
- DG309BDQ-T1
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DG309BDQ-T1.pdf
- Description:
- IC SW SPST-NCX4 85OHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,652
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Product details
Overview
DG309BDQ-T1 from Vishay Siliconix is a quad, normally closed (NC), bi-directional CMOS analog switch in 16-lead TSSOP package, rated for ±22 V analog signal range, with 45 Ω typical on-resistance, <200 ns turn-on time, and 1 pC charge injection - used in precision sample-and-hold circuits and digitally programmable gain amplifiers.
For engineers reviewing the DG309BDQ-T1 datasheet, DG309BDQ-T1 pinout, DG309BDQ-T1 application, or DG309BDQ-T1 equivalent, this page delivers verified electrical specs, true bi-directional switching behavior, leakage performance down to ±20 pA, RoHS-compliant TSSOP-16 packaging, and validated alternatives for industrial instrumentation and test equipment design.
Technical Context
The DG309BDQ-T1 implements four independent single-pole single-throw (SPST) switches with normally closed logic polarity: logic low (≤3.5 V) enables conduction, logic high (≥11 V) opens the path. Each channel features epitaxial latchup protection and operates over ±4 V to ±22 V dual supply or 4 V to 44 V single supply.
Its silicon gate CMOS process delivers matched RDS(on) (ΔRDS(on) ≤2 %), low off-isolation degradation (<–90 dB at 100 kHz), and minimal crosstalk (–95 dB), enabling accurate signal routing in multi-channel data acquisition systems without signal coupling or transient injection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V (guaranteed full-range operation with ±15 V supplies; supports ±22 V absolute max) |
| RDS(on) | 45 Ω typical (enables <0.1 % gain error in 1 kΩ load precision amplifier paths) |
| Charge Injection | 1 pC (limits sample-and-hold voltage step error to <1 mV with 1 nF hold capacitor) |
| tON/tOFF | <200 ns / <150 ns (supports >2 MHz multiplexed sampling without timing skew) |
| IS(off)/ID(off) | ±20 pA max (preserves DC accuracy in high-impedance sensor front-ends) |
| Off-Isolation (OIRR) | 90 dB at 100 kHz (prevents signal bleed between channels in 16-bit ADC input muxes) |
| Supply Range | ±4 V to ±22 V dual or 4 V to 44 V single (enables direct interface with ±15 V op-amps and 12 V PLC I/O) |
Pinout & Package
Package: 16-lead TSSOP (JEDEC MS-012, body dimensions 5.00 × 4.40 × 1.20 mm, 0.65 mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Digital Input (IN1–IN4) | CMOS-compatible control lines; logic low (≤3.5 V) closes switch, logic high (≥11 V) opens |
| 5, 7, 10, 12 | Source (S1–S4) | Bi-directional analog terminals; connect to signal source or load depending on system topology |
| 6, 8, 11, 13 | Drain (D1–D4) | Bi-directional analog terminals; paired with Sx to form NC SPST paths |
| 9 | GND | Digital ground reference; must be tied to system digital common, separate from analog ground if noise-sensitive |
| 14 | V− | Negative supply rail; sets lower bound of analog signal range and bias for internal level shifters |
| 15 | V+ | Positive supply rail; sets upper bound of analog signal range and powers internal logic drivers |
| 16 | NC | No connect; internally unconnected; must remain floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Normally closed (NC) topology | Ensures default signal continuity during power-up, reset, or control loss - critical for fail-safe sensor monitoring |
| Epitaxial latchup protection | Prevents destructive parasitic SCR activation under overvoltage or ESD stress in industrial environments |
| True bi-directional conduction | Supports signal flow from S→D or D→S with identical RDS(on) and leakage - simplifies PCB routing in bidirectional buses |
| Low 1 pC charge injection | Minimizes voltage glitch on hold capacitors, enabling sub-12-bit settling in sample-and-hold stages |
| ±22 V absolute max rating | Allows safe handling of transient overvoltages beyond ±15 V rails without external clamping diodes |
Applications
| Precision Sample-and-Hold Circuits | Digitally Programmable Gain Amplifiers |
|---|---|
Use Scenario: Capturing fast analog transients from piezoelectric sensors or RF envelope detectors with minimal aperture error. IC Role / Device Role / Timing Role: DG309BDQ-T1 acts as the hold switch, closing during acquisition and opening precisely on command to isolate the hold capacitor. Use Value: 1 pC charge injection and <200 ns tON limit acquisition error to <0.5 mV with 1 nF capacitor, supporting 14-bit effective resolution. | Use Scenario: Selecting feedback resistor networks in op-amp circuits to achieve discrete gain steps (e.g., ×1, ×10, ×100) under microcontroller control. IC Role / Device Role / Timing Role: DG309BDQ-T1 serves as low-leakage, low-RDS(on) gain-setting switch, connecting resistors between op-amp output and inverting input. Use Value: 45 Ω RDS(on) introduces <0.05 % gain error in 100 kΩ feedback paths; ±20 pA leakage avoids DC offset drift in high-Z nodes. |
| Automated Test Equipment (ATE) Signal Routing | Industrial Process Monitoring Mux |
Use Scenario: Multiplexing multiple sensor inputs (thermocouples, strain gauges) into a shared high-precision ADC in benchtop analyzers. IC Role / Device Role / Timing Role: DG309BDQ-T1 functions as a low-crosstalk, high-isolation analog mux stage, isolating inactive channels from active measurement paths. Use Value: –95 dB crosstalk and –90 dB off-isolation prevent signal coupling between 16-bit channels, maintaining measurement integrity across 8+ inputs. | Use Scenario: Scanning 4–8 temperature/pressure transmitters in PLC-based factory control systems with long cable runs and noisy 24 VDC environments. IC Role / Device Role / Timing Role: DG309BDQ-T1 provides robust, rail-to-rail analog switching between field transmitters and isolated signal conditioners, surviving ±22 V transients. Use Value: ±22 V rating eliminates need for external TVS clamps; 85 °C operating range ensures reliability in uncooled control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4675ESE+ | Quad SPST NC, 44 V max supply, 60 Ω RDS(on), 2.5 pC charge injection, SOIC-16 package | Higher RDS(on) and charge injection; lacks ±22 V analog range guarantee | Preferred when single 30 V supply suffices and SOIC-16 footprint is required |
| ADG1409BRUZ | Quad SPST NC, ±15 V supply, 4.7 Ω RDS(on), 0.2 pC charge injection, TSSOP-16, but only rated to ±16.5 V | Lower RDS(on) and charge injection, but narrower ±16.5 V absolute max rating | Optimal for ultra-low distortion audio or high-speed DAQ where ±15 V rails are fixed and signal fidelity is paramount |
Compared with DG309BDQ-T1, MAX4675ESE+ trades higher on-resistance and charge injection for wider single-supply headroom, while ADG1409BRUZ delivers superior analog performance within tighter voltage limits - making DG309BDQ-T1 the balanced choice for ±15 V industrial systems requiring robustness, precision, and TSSOP space efficiency.
Availability
DG309BDQ-T1 is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG309BDQ-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 components and analog ICs, with leadership in MOSFETs, diodes, optoelectronics, and precision analog switches.
The DG309B series belongs to Vishay's improved quad analog switch product line, designed specifically for high-fidelity signal routing in industrial, test, and instrumentation applications where low leakage, low charge injection, and rail-to-rail analog handling are essential.
FAQ
What is the logic polarity configuration of the DG309BDQ-T1?
The DG309BDQ-T1 is a normally closed (NC) analog switch: a logic low input (≤3.5 V) turns the switch ON (conducting), and a logic high input (≥11 V) turns it OFF (open). This behavior is confirmed in the truth table of Vishay document 70047 and applies identically across all four channels of the DG309BDQ-T1.
Does the DG309BDQ-T1 support single-supply operation?
Yes, the DG309BDQ-T1 supports single-supply operation from 4 V to 44 V, as specified in the "Power Supply Range for Continuous Operation" parameter (VOP). Under 12 V single supply, its analog signal range is 0 V to 12 V, and RDS(on) remains below 200 Ω - enabling use in battery-powered portable instruments and 12 V PLC modules without dual-rail generation.
What is the maximum allowable analog signal voltage for the DG309BDQ-T1?
The DG309BDQ-T1 guarantees full functional operation over ±15 V analog signals when powered by ±15 V supplies. Its absolute maximum rating allows signals up to ±22 V (clamped by internal diodes), but sustained operation above ±15 V requires verification of current limiting per Note (a) in the datasheet to avoid exceeding 30 mA terminal current limits.
How does the DG309BDQ-T1 handle latchup in harsh industrial environments?
The DG309BDQ-T1 incorporates an epitaxial layer in its silicon gate CMOS process that prevents latchup under overvoltage, ESD, or rapid supply transients - a key reliability feature documented in the "DESCRIPTION" section of Vishay document 70047. This makes the DG309BDQ-T1 suitable for deployment in motor drive controls and factory automation where supply bounce and field-induced surges are common.
Is the DG309BDQ-T1 RoHS compliant?
Yes, the DG309BDQ-T1 is RoHS compliant. The "ORDERING INFORMATION" table in Vishay document 70047 lists DG309BDQ-T1 without the "-E3" suffix as a standard RoHS-compliant variant; the "-E3" designation indicates lead-free terminations with exemption waivers, while the base part meets RoHS Directive 2011/65/EU requirements as shipped.
DG309BDQ-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 85Ohm
- Channel-to-Channel Matching (ΔRon):
- 1.7Ohm
- Voltage - Supply, Single (V+):
- 4V ~ 44V
- Voltage - Supply, Dual (V±):
- ±4V ~ 22V
- Switch Time (Ton, Toff) (Max):
- 200ns, 150ns
- -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-TSSOP
DG309BDQ-T1 FAQ
1.How can I place an order for DG309BDQ-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG309BDQ-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 DG309BDQ-T1 reliable?
The price and inventory of DG309BDQ-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG309BDQ-T1 is usually 5 days.
3.What payment methods are accepted for DG309BDQ-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG309BDQ-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG309BDQ-T1?
DG309BDQ-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG309BDQ-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 DG309BDQ-T1?
For technical support, including DG309BDQ-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG309BDQ-T1 requirements.
6.How does Aetrix verify that DG309BDQ-T1 is sourced from the original manufacturer or authorized distributors?
All DG309BDQ-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 DG309BDQ-T1 meets industry standards.
7.What is the process for return or replacement of DG309BDQ-T1?
All DG309BDQ-T1 units undergo pre-shipment inspection (PSI). If there is an issue with DG309BDQ-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 DG309BDQ-T1 part is unused and in its original packaging.
Return procedure for DG309BDQ-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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