My Inquiry
My Account
Vishay Siliconix DG2038DS-T1-E3
- Part No.:
- DG2038DS-T1-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- SOT-23-8
- Datasheet:
-
DG2038DS-T1-E3.pdf
- Description:
- IC SWITCH SPST-NOX2 5OHM SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,094
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DG2038DS-T1-E3 from Vishay Siliconix is a dual SPST analog switch optimized for low-voltage, low-rON signal routing in portable electronics. It operates from 1.8 V to 5.5 V, delivers 3.0 Ω typical on-resistance at 2.7 V, switches in 12 ns, injects only 10 pC charge, and is packaged in SOT23-8 - enabling high-accuracy signal path control in battery-powered test equipment.
For engineers reviewing the DG2038DS-T1-E3 datasheet, DG2038DS-T1-E3 pinout, DG2038DS-T1-E3 application, or DG2038DS-T1-E3 equivalent, key selection criteria include its active-low logic control (IN = 0 → switch ON), NC-type configuration (normally closed), guaranteed rON flatness ≤0.5 Ω, and -40 °C to +85 °C industrial temperature range.
Technical Context
The DG2038DS-T1-E3 implements a dual monolithic CMOS analog switch with normally closed (NC) topology per channel: IN1 controls NC1–COM1, and IN2 controls NC2–COM2. Each channel conducts bidirectionally when enabled and blocks signals up to the supply rail when disabled.
It uses Vishay's high-density low-voltage process with an epitaxial layer to prevent latchup. Control inputs are TTL/CMOS-compatible, with VINL ≤ 0.4 V (at V+ = 3 V) and VINH ≥ 1.5 V, ensuring robust digital interface across 1.8–5.5 V supply operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 2.7 V, 3.3 V, and 5 V logic/system rails without level shifting. |
| On-Resistance (rON) | 3.0 Ω typ at V+ = 2.7 V - minimizes signal attenuation and distortion in precision analog paths such as sensor front-ends. |
| Charge Injection (QINJ) | 10 pC max - ensures sub-LSB error in 12-bit+ sample-and-hold circuits with 1 nF hold capacitors. |
| Switching Time (tON/tOFF) | 12 ns typ - enables multiplexing of >30 MHz analog signals with minimal timing skew between channels. |
| Off-Leakage Current | ±10 nA max at 85 °C - preserves accuracy in high-impedance DC-coupled signal chains (e.g., thermocouple amplifiers). |
| Logic Polarity | Active-low - IN = 0 V turns switch ON; simplifies direct connection to microcontroller GPIOs without inverters. |
| Channel Configuration | Dual NC (Normally Closed) - provides fail-safe closed-path behavior during power loss or logic reset. |
Pinout & Package
SOT23-8 package: 3.0 mm × 1.7 mm footprint, 1.3 mm height, surface-mount, lead-free (RoHS-compliant), thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | Digital control input for Channel 1 | Active-low logic: drives NC1–COM1 closed when pulled ≤0.4 V (V+ = 3 V). |
| 2 (NC1) | Normally closed analog terminal, Channel 1 | Connected to COM1 when IN1 = low; open-circuited when IN1 = high. |
| 3 (V+) | Positive supply rail | Accepts 1.8–5.5 V; powers internal CMOS switch core and level-shifting circuitry. |
| 4 (COM1) | Common analog node, Channel 1 | Bidirectional signal path shared between NC1 and NC2; must remain within 0–V+ range. |
| 5 (NC2) | Normally closed analog terminal, Channel 2 | Connected to COM2 when IN2 = low; electrically isolated when IN2 = high. |
| 6 (IN2) | Digital control input for Channel 2 | Independent active-low control; no crosstalk or timing dependency with IN1. |
| 7 (COM2) | Common analog node, Channel 2 | Isolated from COM1; supports independent dual-channel signal routing. |
| 8 (GND) | Ground reference | Analog and digital ground return; must be low-impedance and tied to system AGND/DGND plane. |
Key Features
| Feature | Design Value |
|---|---|
| Low rON flatness (≤0.5 Ω) | Ensures consistent gain and linearity across full analog signal swing (0–V+), critical for audio and sensor conditioning. |
| Matched rON (≤0.3 Ω between channels) | Enables precise differential signal switching with <0.01% gain mismatch in instrumentation amplifier front-ends. |
| 17 pF source-off capacitance (CNC/OFF) | Minimizes feedthrough and crosstalk in high-frequency multiplexed systems (e.g., RF test set signal routing). |
| Epitaxial latchup immunity | Guarantees robust operation under transient overvoltage or ESD events without destructive latchup. |
| 1.0 µA max supply current | Reduces quiescent power in always-on monitoring circuits - e.g., battery voltage supervision with periodic ADC sampling. |
Applications
| Portable Test Equipment | Battery-Operated Medical Sensors |
|---|---|
Use Scenario: Signal routing in handheld multimeters and oscilloscope probes for auto-ranging analog front-end selection. IC Role / Device Role / Timing Role: Dual NC analog switch providing fail-safe continuity during power-up and low-distortion multiplexing of mV–V range sensor outputs. Use Value: 3.0 Ω rON and 10 pC QINJ preserve measurement accuracy across 4½-digit resolution without calibration drift. | Use Scenario: Isolating ECG electrode inputs during lead-off detection and routing biopotential signals to ADC channels. IC Role / Device Role / Timing Role: Low-leakage (±10 nA), bidirectional analog switch enabling DC-coupled, high-Z electrode interfaces with zero-crossing integrity. Use Value: Active-low control allows direct GPIO drive from ultra-low-power MCU; NC topology maintains patient safety path during sleep mode. |
| Cellular Phone Audio Path | Industrial Data Acquisition Modules |
Use Scenario: Selecting between headset, speaker, and microphone paths in smartphone baseband IC audio subsystems. IC Role / Device Role / Timing Role: Dual SPST switch managing analog audio routing with minimal THD+N (<0.01%) and no pop/click artifacts. Use Value: 12 ns switching and 35 pF channel-on capacitance ensure wideband audio fidelity (20 Hz–20 kHz) with <100 ps inter-channel skew. | Use Scenario: Multiplexing multiple RTD or thermocouple inputs into a single precision delta-sigma ADC in PLC analog input cards. IC Role / Device Role / Timing Role: Precision analog switch providing matched rON and low leakage to maintain <0.1 °C temperature measurement repeatability. Use Value: rON flatness ≤0.5 Ω eliminates gain nonlinearity across full sensor voltage range, reducing software correction overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NC analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4676EUA+ | Higher rON (4.5 Ω typ at 3 V), 15 pC QINJ, same SOT23-8, active-low NC | Lower bandwidth (tON = 25 ns), higher supply current (2 µA) | Preferred where cost sensitivity outweighs 15% rON penalty and 3 ns slower switching is acceptable. |
| ADG779BRMZ | Active-high NC control, 3.5 Ω rON at 3 V, 12 pC QINJ, MSOP-8 only | Requires logic inversion for MCU GPIO compatibility; larger 3 mm × 3 mm footprint | Selected when board layout accommodates MSOP-8 and system firmware supports active-high control sequencing. |
Compared with MAX4676EUA+ and ADG779BRMZ, the DG2038DS-T1-E3 offers the lowest rON and fastest switching in SOT23-8, making it optimal for space-constrained, high-fidelity analog multiplexing where active-low control aligns with existing MCU pinout.
Availability
DG2038DS-T1-E3 is available at Aetrix Electronics and suitable for portable test equipment, battery-operated medical sensors, and cellular phone audio path designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for DG2038DS-T1-E3 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 leader in discrete semiconductors and passive components, specializing in high-reliability MOSFETs, diodes, optoelectronics, and analog switches with emphasis on performance, miniaturization, and ruggedness.
The DG2037/2038/2039 family was designed specifically for low-voltage, low-rON analog signal routing in space- and power-constrained portable electronics - prioritizing precision, speed, and fail-safe NC behavior over general-purpose switching versatility.
FAQ
What is the logic polarity of DG2038DS-T1-E3, and how does it affect system interface design?
The DG2038DS-T1-E3 uses active-low logic: applying 0 V (or ≤0.4 V at V+ = 3 V) to IN1 or IN2 closes the respective NC–COM switch path. This eliminates need for external inverters when driven directly by microcontroller GPIOs configured as open-drain or push-pull with low-active output. The DG2038DS-T1-E3 truth table confirms "Logic 0 = On", simplifying firmware control sequences in battery-powered devices.
Does DG2038DS-T1-E3 support rail-to-rail analog signal switching, and what are the voltage limits?
Yes, the DG2038DS-T1-E3 supports rail-to-rail analog signal switching: analog voltages on NC, COM, or NO pins may range from 0 V to V+, provided V+ stays within 1.8 V to 5.5 V. Absolute maximum ratings specify -0.3 V to (V+ + 0.3 V) on analog terminals, with internal clamping diodes limiting excursion. For safe operation, keep all analog signals strictly within 0–V+ - the DG2038DS-T1-E3 guarantees specified rON and leakage only within this range.
How does the DG2038DS-T1-E3 achieve latchup immunity, and is external protection required?
The DG2038DS-T1-E3 incorporates an epitaxial layer in its silicon process to prevent parasitic SCR formation - a documented latchup mitigation technique verified across -40 °C to +85 °C. No external protection (e.g., series resistors or TVS) is required for latchup prevention under normal operation. However, per datasheet Note a, forward diode current must be limited to rated maxima if analog signals exceed V+ or go below GND - the DG2038DS-T1-E3 itself remains latchup-immune under those stressed conditions.
Can DG2038DS-T1-E3 be used in AC-coupled signal paths, and what is its off-isolation performance?
Yes, the DG2038DS-T1-E3 is suitable for AC-coupled paths, delivering -61 dB off-isolation (OIRR) at 1 MHz with 50 Ω source/load and 5 pF capacitance. Its 17 pF NC-off capacitance and 19 pF COM-off capacitance minimize feedthrough above 100 kHz. For high-fidelity audio or IF routing, the DG2038DS-T1-E3 achieves -67 dB crosstalk, ensuring channel separation exceeds 16-bit dynamic range requirements without additional shielding.
What is the thermal derating behavior of DG2038DS-T1-E3 in SOT23-8 package?
In SOT23-8 package, the DG2038DS-T1-E3 has a thermal resistance θJA of 250 °C/W (typical), with power dissipation derated linearly above 25 °C at 6.5 mW/°C. At 85 °C ambient, maximum allowable power drops to ~220 mW - well above its 5.5 µW typical operating consumption. This margin ensures stable DG2038DS-T1-E3 performance even in sealed enclosures with minimal airflow, provided PCB copper area meets Vishay's recommended layout guidelines.
DG2038DS-T1-E3 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:
- 2
- On-State Resistance (Max):
- 5Ohm
- Channel-to-Channel Matching (ΔRon):
- 200mOhm (Max)
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 30ns, 22ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 15pF, 17pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -67dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
DG2038DS-T1-E3 FAQ
1.How can I place an order for DG2038DS-T1-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for DG2038DS-T1-E3 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 DG2038DS-T1-E3 reliable?
The price and inventory of DG2038DS-T1-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG2038DS-T1-E3 is usually 5 days.
3.What payment methods are accepted for DG2038DS-T1-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG2038DS-T1-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG2038DS-T1-E3?
DG2038DS-T1-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG2038DS-T1-E3 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 DG2038DS-T1-E3?
For technical support, including DG2038DS-T1-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG2038DS-T1-E3 requirements.
6.How does Aetrix verify that DG2038DS-T1-E3 is sourced from the original manufacturer or authorized distributors?
All DG2038DS-T1-E3 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 DG2038DS-T1-E3 meets industry standards.
7.What is the process for return or replacement of DG2038DS-T1-E3?
All DG2038DS-T1-E3 units undergo pre-shipment inspection (PSI). If there is an issue with DG2038DS-T1-E3, 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 DG2038DS-T1-E3 part is unused and in its original packaging.
Return procedure for DG2038DS-T1-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DG2038DS-T1-E3 Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
