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Vishay Siliconix DG309BDQ
- Part No.:
- DG309BDQ
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DG309BDQ.pdf
- Description:
- IC SW SPST-NCX4 85OHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,339
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Product details
Overview
DG309BDQ from Vishay Siliconix is a quad normally closed (NC) CMOS analog switch in 16-pin TSSOP package, rated for ±22 V dual-supply operation, with 45 Ω typical on-resistance, <200 ns turn-on time, and 1 pC charge injection. It serves as a precision signal routing device in sample-and-hold circuits, programmable gain amplifiers, and low-distortion instrumentation front-ends.
For engineers reviewing the DG309BDQ datasheet, DG309BDQ pinout, DG309BDQ application, or DG309BDQ equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in test equipment and industrial data acquisition, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The DG309BDQ implements four independent single-pole single-throw (SPST) switches with complementary logic control versus DG308B (NO), enabling bidirectional analog signal switching up to ±15 V under ±15 V supply. Its epitaxial layer prevents latchup, and internal charge injection compensation minimizes transients during switching.
It supports both dual-supply (±4 V to ±22 V) and single-supply (4 V to 44 V) operation, with guaranteed analog signal range of ±15 V at ±15 V supplies and 0–12 V at 12 V single supply. Logic thresholds are fixed at VINH ≥ 11 V and VINL ≤ 3.5 V, requiring level-shifting for TTL/CMOS compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±4 V to ±22 V dual supply; enables wide dynamic range signal handling without clipping |
| On-Resistance (RDS(on)) | 45 Ω typical at ±15 V; ensures minimal gain error and channel-to-channel mismatch in precision gain-setting networks |
| Charge Injection | 1 pC typical; limits voltage step error in sample-and-hold hold capacitors to sub-mV levels |
| Turn-On Time (tON) | <200 ns at ±15 V; supports sampling rates up to ~2 MHz in fast data acquisition systems |
| Off-Leakage Current | ±20 pA max at ±14 V; preserves long hold times (>1 s) in high-impedance sample capacitors |
| Analog Signal Range | ±15 V at ±15 V supply; matches standard industrial op-amp rails and sensor output ranges |
| Logic Thresholds | VINH ≥ 11 V, VINL ≤ 3.5 V; requires external level shifters when interfacing with 3.3 V or 5 V microcontrollers |
Pinout & Package
Package: 16-pin TSSOP (JEDEC MS-012), 5.0 mm × 4.4 mm footprint, 0.65 mm pitch, 1.2 mm max height - optimized for space-constrained portable instrumentation and automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | D1–D4 (Drain) | Analog outputs; connect to downstream circuitry (e.g., op-amp inputs, ADC channels) |
| 5, 6, 7, 8 | S1–S4 (Source) | Analog inputs; accept signals from sensors, DACs, or multiplexed sources |
| 9 | GND | Logic ground reference; must be tied to system digital ground with low-inductance path |
| 10, 11, 12, 13 | IN1–IN4 (Control Inputs) | Active-high logic inputs; logic "1" (≥11 V) opens switch (disconnects NC path) |
| 14 | V− | Negative supply rail; must be decoupled with ≥0.1 µF ceramic capacitor near pin |
| 15 | V+ | Positive supply rail; decoupling required to suppress switching-induced supply noise |
| 16 | NC | No connection; left floating per datasheet - no internal bond wire or circuit tie |
Key Features
| Feature | Design Value |
|---|---|
| Normally closed (NC) topology | Ensures fail-safe signal continuity during power loss or logic reset in critical monitoring paths |
| Epitaxial latchup protection | Guarantees robust operation in noisy industrial environments with transient voltage spikes |
| Bidirectional analog conduction | Supports signal flow in either direction without polarity constraints - ideal for AC-coupled sensor interfaces |
| Low off-isolation degradation vs. frequency | Maintains >90 dB isolation up to 100 kHz, preserving signal integrity in multi-channel multiplexed systems |
| Extended temperature range (–40 °C to +85 °C) | Validated performance across full industrial operating envelope without derating |
Applications
| Sample-and-Hold Circuits | Programmable Gain Amplifiers |
|---|---|
Use Scenario: Capturing fast-changing analog waveforms (e.g., motor current sensing) with minimal aperture error and droop. IC Role / Device Role / Timing Role: DG309BDQ acts as the hold switch, closing to charge the hold capacitor and opening to isolate it during conversion. Use Value: 1 pC charge injection and ±20 pA leakage ensure <5 mV sample-to-hold offset and <5 mV/s droop rate per datasheet Figure 7. | Use Scenario: Digitally selecting feedback resistor values in precision op-amp configurations for variable gain (×1, ×10, ×100). IC Role / Device Role / Timing Role: DG309BDQ provides low-RDS(on) switching of feedback network nodes without introducing gain error or thermal EMF. Use Value: 45 Ω on-resistance contributes <0.05% gain error in 10 kΩ feedback paths, and NC default state maintains baseline gain during initialization. |
| Automated Test Equipment (ATE) | Industrial Data Acquisition Front-Ends |
Use Scenario: Routing multiple DUT signals to shared measurement resources (oscilloscope inputs, DMM channels) with minimal crosstalk. IC Role / Device Role / Timing Role: DG309BDQ serves as a low-crosstalk (95 dB) analog multiplexer stage before signal conditioning. Use Value: 95 dB channel-to-channel crosstalk and 90 dB off-isolation at 100 kHz prevent interference between adjacent test channels. | Use Scenario: Isolating sensor inputs (thermocouples, strain gauges) from shared analog backplane during calibration or fault detection. IC Role / Device Role / Timing Role: DG309BDQ functions as a guarded input disconnect switch, breaking high-impedance sensor paths before applying test voltages. Use Value: ±22 V rating allows safe application of ±15 V test signals while maintaining >10¹² Ω off-isolation at room temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4619ESE+ | Quad SPST NC switch; 35 Ω RDS(on); 3 V to 15 V single/dual supply; 3.3 V logic compatible | Designed for low-voltage portable systems; lacks ±22 V rating and extended temp support | Select when interfacing directly with 3.3 V microcontrollers and operating below ±15 V analog ranges |
| ADG1409BRUZ | Quad SPST NC switch; 4.7 Ω RDS(on); ±15 V supply; 2.7 V to 5.5 V logic; 12-bit accuracy grade | Higher performance for precision metrology; higher cost and larger LFCSP package | Select when sub-1 Ω on-resistance matching and <0.1 pC charge injection are required for 16+ bit systems |
Compared with DG309BDQ, MAX4619ESE+ offers lower logic-level compatibility but sacrifices voltage range and temperature capability, while ADG1409BRUZ delivers superior on-resistance and charge injection specs at higher cost and different packaging - making DG309BDQ the optimal balance of ruggedness, precision, and manufacturability for industrial-grade signal routing.
Availability
DG309BDQ is available at Aetrix Electronics and suitable for industrial instrumentation, automated test equipment, and portable instrument design requiring stable component supply, RoHS-compliant sourcing, and long-term lifecycle support.
Supply support for DG309BDQ 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, engineered for high-voltage signal routing in demanding industrial and test equipment applications where reliability, low distortion, and latchup immunity are critical.
FAQ
What is the maximum analog signal voltage the DG309BDQ can handle?
The DG309BDQ supports analog signals up to ±15 V when operated with ±15 V supplies, and up to ±22 V with corresponding supply rails. Absolute maximum analog voltage is clamped by internal diodes at (V−) − 2 V to (V+) + 2 V, with forward diode current limited to 30 mA per terminal per datasheet Absolute Maximum Ratings table.
Is DG309BDQ pin-compatible with DG309BDY or DG309BDJ?
Yes, DG309BDQ shares identical pinout and electrical specifications with DG309BDY (SOIC) and DG309BDJ (PDIP) variants - all three use the same functional block diagram and truth table. Only package dimensions and thermal characteristics differ; PCB layout must accommodate TSSOP footprint and reflow profile.
Does DG309BDQ require external level shifting for 3.3 V microcontroller control?
Yes, DG309BDQ requires external level shifting because its logic high threshold is ≥11 V and logic low is ≤3.5 V. A 3.3 V GPIO cannot reliably drive INx pins - solutions include using a discrete transistor stage, dedicated level shifter IC, or selecting an alternative like MAX4619ESE+ with 3.3 V logic compatibility.
What is the thermal derating behavior of DG309BDQ above 75 °C?
For the TSSOP package (DQ suffix), DG309BDQ has a power dissipation derating of 7.6 mW/°C above 75 °C, as specified in Absolute Maximum Ratings. At 100 °C ambient, maximum allowable power drops to 640 mW − (25 °C × 7.6 mW/°C) = 450 mW, requiring careful thermal design in enclosed industrial enclosures.
Can DG309BDQ be used in single-supply configurations?
Yes, DG309BDQ supports single-supply operation from 4 V to 44 V. At 12 V supply, it delivers 0–12 V analog signal range, 90 Ω typical RDS(on), and 300 ns tON. The device maintains true bidirectional conduction and retains NC functionality, but charge injection increases to 4 pC and leakage rises slightly versus dual-supply mode.
DG309BDQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for DG309BDQ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG309BDQ 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 reliable?
The price and inventory of DG309BDQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG309BDQ is usually 5 days.
3.What payment methods are accepted for DG309BDQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG309BDQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG309BDQ?
DG309BDQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG309BDQ 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?
For technical support, including DG309BDQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG309BDQ requirements.
6.How does Aetrix verify that DG309BDQ is sourced from the original manufacturer or authorized distributors?
All DG309BDQ 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 meets industry standards.
7.What is the process for return or replacement of DG309BDQ?
All DG309BDQ units undergo pre-shipment inspection (PSI). If there is an issue with DG309BDQ, 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 part is unused and in its original packaging.
Return procedure for DG309BDQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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