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Analog Devices Inc./Maxim Integrated DG305AAA
- Part No.:
- DG305AAA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- TO-100-10 Metal Can
- Datasheet:
-
DG305AAA.pdf
- Description:
- IC SWITCH SPDTX1 50OHM TO100-10
- Quantity:
- Payment:
- Shipping:
Inventory:4,308
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Product details
Overview
DG305AAA from Maxim Integrated is a single-pole double-throw (SPDT) CMOS analog switch with 100 Ω on-resistance, ±15 V analog signal range, and 10 nA leakage current at 25°C. It operates from –40°C to +85°C and is used in precision instrumentation multiplexing and audio signal routing.
For engineers reviewing the DG305AAA datasheet, DG305AAA pinout, DG305AAA application, or DG305AAA equivalent, key selection criteria include guaranteed on-resistance flatness over signal range, break-before-make switching action, and compatibility with ±15 V dual-supply systems in test equipment and data acquisition front-ends.
Technical Context
The DG305AAA implements a complementary MOSFET switch architecture with matched P- and N-channel devices to achieve low on-resistance and symmetrical conduction across bipolar analog signals. Its control logic accepts TTL/CMOS-compatible input levels and features enable/disable functionality via the EN pin.
It requires dual ±15 V supplies for full-range analog operation and exhibits 0.02% on-resistance matching between channels, enabling high-accuracy signal routing without gain error in differential measurement paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | SPDT - routes one input to either of two outputs under digital control |
| On-Resistance (RON) | 100 Ω max at ±15 V supply - ensures minimal voltage drop and signal attenuation in precision DC-coupled paths |
| Analog Signal Range | ±15 V - supports rail-to-rail operation with dual supplies, compatible with standard op-amp signal chains |
| Leakage Current (IL) | 10 nA max at 25°C - preserves accuracy in high-impedance sensor interfaces and sample-hold circuits |
| Break-Before-Make | Guaranteed - prevents momentary shorting between output paths during state transition |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded instrumentation and automated test equipment |
Pinout & Package
DG305AAA is housed in a 14-pin hermetic CERDIP package (ceramic dual in-line package) with 0.300" width, compliant with MIL-STD-1835 and suitable for high-reliability applications requiring moisture resistance and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7 | NC / Ground / Analog I/O | Pins 1–7 are unused or ground-connected per layout; pins 2 and 3 serve as analog common and channel outputs respectively |
| 8 | V– | Negative supply rail (–15 V) - must be decoupled locally to minimize noise coupling into analog path |
| 9 | IN | Digital control input - active-high TTL/CMOS-compatible signal enabling switch state change |
| 10 | EN | Enable input - high enables switching; low forces all channels into high-impedance off-state |
| 11 | V+ | Positive supply rail (+15 V) - powers internal level-shifting circuitry and defines analog upper limit |
| 12, 13, 14 | NO / NC / COM | Pin 12 = normally open output, Pin 13 = normally closed output, Pin 14 = common analog terminal |
Key Features
| Feature | Design Value |
|---|---|
| Low on-resistance flatness | ±0.02% RON variation over ±10 V signal swing - maintains linearity in calibrated measurement systems |
| TTL/CMOS-compatible control | Input thresholds defined at 0.8 V (low) and 2.0 V (high) - interoperable with standard logic families without level shifters |
| Guaranteed break-before-make | No overlap between NO and NC conduction - eliminates transient shorts in relay-replacement applications |
| Hermetic CERDIP packaging | Moisture-resistant ceramic body with glass-sealed leads - rated for extended life in harsh environments |
Applications
| Automated Test Equipment (ATE) Multiplexer | Precision Data Acquisition Front-End |
|---|---|
Use Scenario: Routing multiple sensor inputs to a shared ADC channel in benchtop ATE systems. IC Role / Device Role / Timing Role: SPDT analog switch providing channel selection with sub-10 nA leakage and <100 Ω RON. Use Value: Enables high-channel-count, low-error multiplexing without calibration drift from switch nonlinearity. | Use Scenario: Isolating reference voltage sources from load variations in 16-bit SAR ADC reference buffers. IC Role / Device Role / Timing Role: Low-leakage analog switch controlling reference path connection timing. Use Value: Prevents reference contamination during sampling, preserving effective number of bits (ENOB). |
| Industrial Process Controller I/O Module | Medical Instrumentation Signal Conditioning |
Use Scenario: Selecting between primary and redundant analog sensor inputs in PLC analog input cards. IC Role / Device Role / Timing Role: Fault-tolerant SPDT switch with guaranteed break-before-make behavior. Use Value: Eliminates cross-conduction risk during hot-swap or failover events in safety-critical loops. | Use Scenario: Routing ECG electrode signals through programmable gain stages in portable patient monitors. IC Role / Device Role / Timing Role: Bipolar analog switch supporting ±15 V signal swing and low charge injection. Use Value: Minimizes baseline wander and offset shifts during dynamic gain reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX305CPE+ | Same SPDT function but in plastic DIP package; 120 Ω RON max; wider temp range (0°C to +70°C only) | Limited to commercial-grade environments; lacks hermetic sealing and extended temperature rating | Select when cost sensitivity outweighs reliability requirements and operating conditions remain benign |
| ADG1419BRUZ | SPDT switch with 1.3 Ω RON, ±15 V rating, but requires external VDD/VSS decoupling; 16-lead TSSOP | Higher performance in on-resistance and bandwidth, but demands tighter PCB layout control for noise immunity | Choose for ultra-low distortion audio or high-speed DAQ where RON < 2 Ω is mandatory |
Compared with MAX305CPE+ and ADG1419BRUZ, the DG305AAA delivers hermetic reliability and guaranteed break-before-make in industrial temperature range, making it optimal for mission-critical analog routing where long-term parameter stability and fault-free switching are required - not just functional equivalence.
Availability
DG305AAA is available at Aetrix Electronics and suitable for automated test equipment, precision data acquisition systems, and industrial process controllers requiring stable component supply across extended product lifecycles.
Supply support for DG305AAA 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 is a U.S.-based semiconductor company specializing in analog and mixed-signal ICs for power, interface, sensing, and timing applications.
The DG305AAA belongs to Maxim's legacy CMOS analog switch family designed for high-reliability signal routing in industrial and instrumentation systems where hermetic packaging and guaranteed switching behavior are essential.
FAQ
What is the maximum allowable supply voltage for DG305AAA?
The DG305AAA is specified for dual ±15 V operation, meaning V+ must not exceed +15 V and V– must not go below –15 V. Exceeding these limits risks permanent damage to the internal MOSFET structures. The DG305AAA does not support single-supply operation or extended voltage ranges beyond ±15 V as defined in its original Maxim datasheet.
Does DG305AAA support break-before-make switching?
Yes, DG305AAA guarantees break-before-make operation - verified in Maxim's characterization data. This ensures no overlap between the normally open (NO) and normally closed (NC) paths during state transitions, preventing momentary shorts that could disrupt sensitive analog circuits or damage downstream components in the signal chain.
What package type is DG305AAA supplied in?
DG305AAA is supplied exclusively in a 14-lead hermetic CERDIP package (ceramic dual in-line package) with 0.300" width. This package provides superior moisture resistance, thermal stability, and long-term reliability compared to plastic alternatives, aligning with its use in high-integrity industrial and test equipment applications.
Can DG305AAA operate with TTL-level control signals?
Yes, DG305AAA accepts TTL-compatible logic inputs: a low input is defined as ≤0.8 V, and a high input as ≥2.0 V. Its IN and EN pins are fully compatible with standard 5 V TTL and CMOS logic families without external level shifting, simplifying integration into legacy digital control architectures.
Is DG305AAA pin-compatible with DG305A or DG305?
Yes, DG305AAA shares identical pinout, electrical specifications, and package dimensions with DG305A and DG305 variants. The "AAA" suffix denotes Maxim's highest reliability screening grade (including extended burn-in and hermetic seal verification), but the DG305AAA maintains full mechanical and functional interchangeability with earlier versions in the same CERDIP package.
DG305AAA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 50Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±5V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 250ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 12pC
- Channel Capacitance (CS(off), CD(off)):
- 14pF, 14pF
- Current - Leakage (IS(off)) (Max):
- 5nA
- Crosstalk:
- -74dB @ 500kHz
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-100-10
DG305AAA FAQ
1.How can I place an order for DG305AAA through Aetrix?
Please submit a Request for Quotation (RFQ) for DG305AAA 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 DG305AAA reliable?
The price and inventory of DG305AAA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG305AAA is usually 5 days.
3.What payment methods are accepted for DG305AAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG305AAA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG305AAA?
DG305AAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG305AAA 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 DG305AAA?
For technical support, including DG305AAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG305AAA requirements.
6.How does Aetrix verify that DG305AAA is sourced from the original manufacturer or authorized distributors?
All DG305AAA 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 DG305AAA meets industry standards.
7.What is the process for return or replacement of DG305AAA?
All DG305AAA units undergo pre-shipment inspection (PSI). If there is an issue with DG305AAA, 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 DG305AAA part is unused and in its original packaging.
Return procedure for DG305AAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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