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Analog Devices Inc./Maxim Integrated DG305ACJ
- Part No.:
- DG305ACJ
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
DG305ACJ.pdf
- Description:
- IC SWITCH SPDT X 1 50OHM 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,125
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Product details
Overview
DG305ACJ 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, used in precision instrumentation multiplexing and audio signal routing.
For engineers reviewing the DG305ACJ datasheet, DG305ACJ pinout, DG305ACJ application, or DG305ACJ equivalent, key selection criteria include on-resistance matching (max 5 Ω between channels), break-before-make timing (typ 15 ns), and operation over –40°C to +85°C industrial temperature range.
Technical Context
The DG305ACJ implements a transmission-gate architecture using complementary P- and N-channel MOSFETs to achieve low distortion and rail-to-rail analog switching. It features TTL/CMOS-compatible control inputs and operates from dual ±5 V to ±15 V supplies.
Its channel-to-channel on-resistance match (ΔRON ≤ 5 Ω) and low charge injection (5 pC typ) support high-accuracy sampling in data acquisition systems. The device does not include internal ESD protection diodes beyond standard process-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | SPDT - routes one input to either of two outputs without internal connection between outputs |
| RON (max) | 100 Ω at ±15 V supply - ensures minimal signal attenuation in 50–600 Ω impedance systems |
| RON Matching | ≤5 Ω - enables precise differential signal switching with <0.1% gain error |
| Leakage Current | ±10 nA at 25°C - preserves accuracy in high-impedance sensor front-ends |
| Charge Injection | 5 pC typical - limits voltage glitch to <1 mV in 12-bit SAR ADC sample-hold circuits |
| Bandwidth | 500 MHz - supports video and fast pulse signal routing up to ~80 MHz fundamental |
Pinout & Package
DG305ACJ is housed in a 14-pin hermetically sealed CERDIP package (ceramic dual in-line package) with 0.300" width, rated for military-grade reliability and operation up to +125°C storage temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7 | Analog Channel Terminals (IN, NO, NC) | Pin 1 = IN; Pins 2 & 3 = NO/NC for Channel 1; Pins 4–7 unused in DG305ACJ (DG305 is single-channel SPDT) |
| 8 | GND | Analog/digital common reference - must be low-impedance and star-connected in mixed-signal layouts |
| 9, 10, 11, 12, 13, 14 | Control & Supply Pins | Pins 9 & 10 = V−/V+; Pin 11 = EN (active-high enable); Pins 12–14 = NC (no internal connection) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports signals from V− to V+ (±15 V) - eliminates level-shifting in bipolar op-amp interfaces |
| TTL/CMOS-compatible control logic | EN threshold: 2.0 V min (V+ = 15 V) - allows direct interfacing with 3.3 V or 5 V microcontrollers |
| Low crosstalk (−75 dB @ 100 kHz) | Prevents interference between adjacent channels in multi-channel data loggers |
| Break-before-make switching | Ensures no momentary short between NO and NC paths - critical for safe power sequencing in test equipment |
Applications
| Automated Test Equipment (ATE) Signal Routing | Medical Instrumentation Multiplexer |
|---|---|
Use Scenario: Switching calibration reference voltages and sensor inputs in modular ATE mainframes. IC Role / Device Role / Timing Role: SPDT analog switch enabling programmable path selection between DMM inputs and reference sources. Use Value: 100 Ω RON and ≤5 Ω matching maintain absolute accuracy within ±0.02% of full scale across 16-bit measurement ranges. | Use Scenario: Routing ECG, EEG, and temperature sensor outputs to shared ADC in portable patient monitors. IC Role / Device Role / Timing Role: Low-leakage analog switch isolating high-impedance biopotential electrodes during channel scanning. Use Value: 10 nA max leakage prevents baseline drift >10 µV in 1 MΩ electrode interface networks. |
| Industrial Process Controller I/O Module | Audio Line-Level Signal Selector |
Use Scenario: Configurable analog input conditioning for 4–20 mA loop receivers and thermocouple cold-junction compensation. IC Role / Device Role / Timing Role: Precision SPDT switch selecting between primary sensor and backup calibration path before signal conditioning. Use Value: Break-before-make action prevents hazardous current loop shorts during reconfiguration under live conditions. | Use Scenario: Selecting between microphone preamp, line-in, and DAC output in studio mixer front-end. IC Role / Device Role / Timing Role: Low-distortion analog switch routing unbalanced line-level signals (±2 V) without clipping. Use Value: 500 MHz bandwidth preserves harmonic content up to 20 kHz with <−90 dB THD+N at 1 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX305CPE+ | Same die, plastic DIP-16 package; 125°C max operating temp vs. DG305ACJ's 125°C storage only (85°C operating) | Preferred for cost-sensitive industrial designs where hermetic seal not required | Select MAX305CPE+ when extended temperature operation is unnecessary and RoHS compliance is mandatory |
| ADG1201BRMZ | Single SPDT, 3.5 Ω RON (at ±15 V), but requires ≥3 V logic supply; 100× lower leakage (1 pA) | Better suited for ultra-high-Z pH or ion-selective electrode front-ends | Choose ADG1201BRMZ only when sub-nA leakage dominates design requirements over RON matching |
Compared with MAX305CPE+ and ADG1201BRMZ, DG305ACJ provides hermetic CERDIP reliability and guaranteed RON matching for mission-critical ATE and medical systems where long-term parameter stability outweighs lowest possible on-resistance or leakage.
Availability
DG305ACJ is available at Aetrix Electronics and suitable for automated test equipment, medical instrumentation, industrial process controllers, and professional audio systems requiring stable component supply across extended product lifecycles.
Supply support for DG305ACJ 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) designed precision analog and mixed-signal ICs for industrial, medical, and communications infrastructure applications.
DG305ACJ belongs to the DG30x family of CMOS analog switches engineered for high-reliability signal routing in environments demanding hermetic packaging and guaranteed parametric performance over temperature.
FAQ
What is the maximum supply voltage rating for DG305ACJ?
DG305ACJ supports dual-supply operation from ±5 V to ±15 V. The absolute maximum rating is ±18 V across V+ and V− pins. Exceeding ±15 V may increase RON and degrade charge injection performance. DG305ACJ must never be operated with V+ or V− grounded while the other rail is active - both rails must be powered simultaneously for proper channel isolation.
Does DG305ACJ include built-in ESD protection?
DG305ACJ relies on standard CMOS process-level ESD structures (HBM 2 kV typical) but does not integrate additional clamp diodes or transient suppressors. External series resistors (≥100 Ω) and TVS diodes are recommended for board-level protection in systems exposed to >1 kV contact discharge per IEC 61000-4-2. DG305ACJ's CERDIP package provides inherent moisture resistance but no enhanced ESD shielding.
Can DG305ACJ operate with a single +5 V supply?
No - DG305ACJ requires dual symmetric supplies (e.g., ±5 V, ±12 V, or ±15 V) to support rail-to-rail analog signal swing. A single +5 V supply would limit the analog input range to 0 V to +5 V and cause severe distortion near the rails due to body-diode conduction. DG305ACJ is not specified for single-supply use; alternative parts like MAX305CPE+ offer single-supply variants but with different pinouts and specs.
What is the thermal resistance (θJA) of the DG305ACJ CERDIP package?
The DG305ACJ CERDIP package has a junction-to-ambient thermal resistance (θJA) of 110°C/W under standard JEDEC 2s2p board conditions. This value assumes minimal copper pour and no heatsinking. In practice, DG305ACJ rarely exceeds 40°C junction rise at 1 mA load current and 25°C ambient, making forced cooling unnecessary. DG305ACJ's low static power dissipation (<10 µW) further reduces thermal concerns.
Is DG305ACJ pin-compatible with DG305AJ?
Yes - DG305ACJ and DG305AJ share identical pinout, electrical specifications, and CERDIP-14 mechanical outline. The "C" suffix denotes commercial temperature grade (0°C to +70°C), while "A" indicates extended grade (–40°C to +85°C). Both use the same die and package construction. DG305ACJ is not a drop-in replacement for DG305AJ in industrial applications requiring full –40°C operation, but functions identically at room temperature.
DG305ACJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
DG305ACJ FAQ
1.How can I place an order for DG305ACJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG305ACJ 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 DG305ACJ reliable?
The price and inventory of DG305ACJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG305ACJ is usually 5 days.
3.What payment methods are accepted for DG305ACJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG305ACJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG305ACJ?
DG305ACJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG305ACJ 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 DG305ACJ?
For technical support, including DG305ACJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG305ACJ requirements.
6.How does Aetrix verify that DG305ACJ is sourced from the original manufacturer or authorized distributors?
All DG305ACJ 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 DG305ACJ meets industry standards.
7.What is the process for return or replacement of DG305ACJ?
All DG305ACJ units undergo pre-shipment inspection (PSI). If there is an issue with DG305ACJ, 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 DG305ACJ part is unused and in its original packaging.
Return procedure for DG305ACJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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