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Analog Devices Inc./Maxim Integrated DG445DY
- Part No.:
- DG445DY
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG445DY.pdf
- Description:
- IC SWITCH SPST-NOX4 85OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,032
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Product details
Overview
DG445DY from Maxim Integrated is a quad, normally open (NO), single-pole/single-throw (SPST) analog switch IC designed for precision signal routing in bipolar or single-supply systems. It features 85Ω max on-resistance, <5nA off-leakage at +85°C, 10pC max charge injection, rail-to-rail analog signal handling (±15V), and TTL/CMOS logic compatibility - enabling use in test equipment, audio routing, and military radio front-ends.
For engineers reviewing the DG445DY datasheet, DG445DY pinout, DG445DY application, or DG445DY equivalent, key selection criteria include guaranteed on-resistance matching (4Ω max), on-resistance flatness (9Ω max), ESD tolerance (2000V min), switching speed (tON < 250ns), and operation across ±4.5V to ±20V or +10V to +30V supply ranges.
Technical Context
The DG445DY implements four independent SPST switches with complementary control logic: logic high closes the switch (NO configuration). Its silicon-gate 44V process ensures robust voltage handling and low leakage over temperature. All channels share common V+, V−, GND, and VL pins, supporting both unbalanced and symmetric dual supplies.
Switching performance is tightly specified: tON < 250ns and tOFF < 70ns at ±16.5V, with dynamic parameters including 100dB crosstalk rejection and 60dB off-isolation at 1MHz. Charge injection (≤10pC) and on-resistance flatness (≤9Ω) are guaranteed only under bipolar-supply operation per datasheet Note 4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RDS(ON)) | 85Ω max - ensures minimal signal attenuation and gain error in precision analog paths |
| On-Resistance Match | 4Ω max - enables matched channel behavior critical for multiplexer and chopper applications |
| Charge Injection | 10pC max - limits voltage glitch at sample-hold nodes and preserves ADC accuracy |
| Off-Leakage Current | <5nA at +85°C - maintains signal integrity in high-impedance sensor interfaces |
| Analog Signal Range | ±15V - supports full rail-to-rail operation with ±15V supplies without clipping |
| Supply Range | ±4.5V to ±20V or +10V to +30V - provides flexibility for industrial, military, and battery-powered designs |
| ESD Tolerance | 2000V min (HBM) - enhances reliability during board assembly and field handling |
Pinout & Package
Package: 16-pin narrow SO (Small Outline) - 150 mil body width, surface-mount, RoHS-compliant, rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 (Pins 15,14,7,6) | Logic Control Inputs | Active-high TTL/CMOS-compatible signals controlling individual SPST switch closure |
| D1–D4 (Pins 16,13,5,8) | Drain Terminals | Switch output side - connects to load or downstream circuitry; bidirectional conduction |
| S1–S4 (Pins 1,11,12,4) | Source Terminals | Switch input side - accepts rail-to-rail analog signals up to ±15V |
| V+ (Pin 13) | Positive Supply | Connects to substrate; must be ≥ |V−| + 0.5V; max 44V absolute rating |
| V− (Pin 2) | Negative Supply | Reference for bipolar operation; clamped internally to prevent latch-up |
| GND (Pin 3) | Ground Reference | Logic ground return; separate from analog signal reference plane |
| VL (Pin 10) | Logic Supply | Set to +5V for TTL compatibility or tied to V+ for CMOS-level inputs |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPST NO Configuration | Four independent, non-latching switches with active-high control - simplifies digital interface and eliminates need for inverters |
| Rail-to-Rail Analog Switching | Supports input signals from V− to V+ - enables direct interfacing with op-amps, DACs, and sensors without level-shifting |
| Guaranteed RFLAT(ON) | 9Ω max variation across full ±15V signal range - ensures consistent gain and linearity in instrumentation amplifiers |
| Low Power Consumption | 35µW max - suitable for portable and always-on systems where quiescent current impacts battery life |
| Bipolar & Single-Supply Operation | Operates from ±4.5V to ±20V or +10V to +30V - reduces BOM count by eliminating dedicated supply rails |
Applications
| Test Equipment Signal Routing | Audio Signal Multiplexing |
|---|---|
Use Scenario: Channel selection in automated test equipment (ATE) for routing calibration signals between DUT and measurement instruments. IC Role / Device Role / Timing Role: Precision SPST switch providing low-crosstalk, low-leakage path selection under microcontroller control. Use Value: 100dB crosstalk rejection and <5nA leakage preserve measurement accuracy across temperature and voltage extremes. |
Use Scenario: Dynamic source selection in professional audio mixers and effects processors requiring silent switching. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling zero-crossing mute control and impedance-matched signal path reconfiguration. Use Value: 10pC max charge injection prevents audible pop/click artifacts during real-time audio routing. |
| Military Radio Front-End | Sample-and-Hold Circuits |
Use Scenario: Antenna or filter bank switching in ruggedized HF/VHF transceivers operating across −40°C to +85°C. IC Role / Device Role / Timing Role: High-reliability analog switch handling RF-derived IF signals with ESD-hardened I/O. Use Value: 2000V HBM ESD rating and guaranteed −40°C to +85°C performance ensure field-deployable robustness. |
Use Scenario: Sampling capacitor connection in precision data acquisition systems with >16-bit resolution. IC Role / Device Role / Timing Role: Low-charge-injection switch isolating hold capacitor from input during acquisition phase. Use Value: ≤10pC charge injection minimizes sampling error and supports sub-LSB accuracy in high-resolution ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1414BRUZ | 16-channel, 4.5Ω typical RON, ±15V supply, but requires external level shifters for TTL logic | Higher channel count; better RON match but larger package and higher cost | Select when multi-channel density outweighs cost and layout constraints |
| TS5A23159DCKR | Single-supply only (+1.65V to +5.5V), 0.9Ω RON, but limited to 5.5V max analog range and no bipolar support | Optimized for low-voltage portable audio; unsuitable for ±15V industrial signal chains | Choose only for battery-powered, low-voltage consumer applications |
Compared with ADG1414BRUZ and TS5A23159DCKR, the DG445DY uniquely balances wide analog voltage range (±15V), bipolar supply capability, guaranteed on-resistance flatness, and −40°C to +85°C industrial temperature grade - making it irreplaceable in high-fidelity test, military comms, and precision sample-hold systems.
Availability
DG445DY is available at Aetrix Electronics and suitable for test equipment, military radio front-ends, and sample-and-hold circuits requiring stable component supply across extended temperature and voltage ranges.
Supply support for DG445DY 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The DG445DY belongs to Maxim's legacy precision analog switch family, engineered for demanding signal integrity applications where low leakage, low charge injection, and guaranteed parametric matching are essential.
FAQ
What is the maximum analog signal voltage range supported by the DG445DY?
The DG445DY supports an analog signal range of ±15V when operated from ±15V supplies. This rail-to-rail capability allows full-swing signal handling without clipping, provided V+ and V− remain within their absolute maximum ratings (V+ ≤ 44V referenced to V−). The device maintains specified performance across its entire signal range, with guaranteed on-resistance flatness of ≤9Ω.
Does the DG445DY require a separate logic supply voltage (VL), and what are the options?
Yes, the DG445DY requires VL to set logic threshold levels. VL can be connected to +5V for TTL compatibility or tied directly to V+ for CMOS-level inputs. The datasheet specifies VL must remain within (GND − 0.3V) to (V+ + 0.3V). Using VL = V+ enables single-supply system integration while maintaining noise margin in noisy environments.
Can the DG445DY operate from unbalanced supplies such as +24V and −5V?
Yes, the DG445DY supports unbalanced supplies - for example, +24V and −5V - as long as the difference between V+ and V− does not exceed +44V and each supply remains within its absolute maximum ratings. This flexibility simplifies power architecture in systems with asymmetric voltage rails, though analog signal range scales accordingly (e.g., −5V to +24V).
What is the guaranteed on-resistance matching specification for the DG445DY, and under what conditions does it apply?
The DG445DY guarantees on-resistance matching of ≤4Ω between channels at +25°C, and ≤5Ω over the full −40°C to +85°C temperature range. This specification applies only under bipolar-supply operation (e.g., ±15V) with VD = ±10V and IS = −10mA, as defined in datasheet Note 4. It does not apply to single-supply configurations.
Is the DG445DY pin-compatible with earlier industry-standard DG445 variants?
Yes, the DG445DY maintains identical pinout and footprint with legacy DG445 devices in the 16-pin narrow SO package. It is a drop-in upgrade offering improved on-resistance matching (4Ω vs. older 10Ω spec), lower off-leakage (<5nA vs. 10nA), and enhanced ESD tolerance (2000V vs. 1000V), with no PCB or schematic changes required.
DG445DY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 85Ohm
- Channel-to-Channel Matching (ΔRon):
- 4Ohm (Max)
- Voltage - Supply, Single (V+):
- 10V ~ 30V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 250ns, 170ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 4pF, 4pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -100dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG445DY FAQ
1.How can I place an order for DG445DY through Aetrix?
Please submit a Request for Quotation (RFQ) for DG445DY 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 DG445DY reliable?
The price and inventory of DG445DY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG445DY is usually 5 days.
3.What payment methods are accepted for DG445DY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG445DY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG445DY?
DG445DY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG445DY 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 DG445DY?
For technical support, including DG445DY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG445DY requirements.
6.How does Aetrix verify that DG445DY is sourced from the original manufacturer or authorized distributors?
All DG445DY 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 DG445DY meets industry standards.
7.What is the process for return or replacement of DG445DY?
All DG445DY units undergo pre-shipment inspection (PSI). If there is an issue with DG445DY, 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 DG445DY part is unused and in its original packaging.
Return procedure for DG445DY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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