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Analog Devices Inc./Maxim Integrated DG309DJ
- Part No.:
- DG309DJ
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
DG309DJ.pdf
- Description:
- IC SWITCH SPST-NCX4 100OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,442
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Product details
Overview
DG309DJ from Maxim Integrated is a quad SPST analog switch with normally closed (NC) configuration, designed for precision signal routing in bipolar or single-supply systems. It delivers 60Ω typical on-resistance, <120ns turn-on time, <90ns turn-off time, and supports ±5V to ±20V dual supplies or +5V to +30V single supply - used in military radios and guidance systems where reliable analog path control is critical.
For engineers reviewing the DG309DJ datasheet, DG309DJ pinout, DG309DJ application, or DG309DJ equivalent, key selection criteria include NC logic behavior, 44V breakdown rating, -40°C to +85°C operating range, CMOS-compatible inputs, and verified leakage performance under full analog voltage swing.
Technical Context
The DG309DJ implements monolithic low-power CMOS architecture with substrate-connected V+ pin, enabling robust analog switching across ±15V rails. Its NC topology ensures default conduction without control signal, while fast edge response (<120ns tON) and low charge injection (±10pC) preserve signal integrity in sample-and-hold circuits.
It operates with rail-to-rail analog input capability up to ±15V (or 0V to +30V), supported by symmetrical off-isolation (78dB) and matched channel capacitance (CD(ON)+CS(ON) = 27pF). Input leakage remains below ±100nA over temperature, and supply currents stay under ±100µA at TMAX.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Quad SPST, normally closed (NC) - all four channels conduct when control inputs are low |
| rDS(ON) Typ. | 60Ω at V+ = +15V, V- = -15V - enables low insertion loss in audio and instrumentation signal paths |
| tON / tOFF Max | 200ns / 150ns - supports >5MHz switching in automated test equipment timing windows |
| Analog Range | ±15V (bipolar) or 0V to +30V (single-supply) - accommodates full-scale sensor outputs without level-shifting |
| Breakdown Voltage | 44V - provides 30V peak-to-peak blocking margin for transient suppression in harsh environments |
| Leakage Current | ±100nA max at TMAX - ensures minimal error in high-impedance sample-and-hold hold capacitors |
| Supply Range | ±5V to ±20V or +5V to +30V - allows flexible integration into legacy and modern power architectures |
Pinout & Package
Package: 16-pin plastic DIP (dual in-line package), 0.3-inch width, through-hole mounting compatible with standard PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 (Pins 1, 8, 9, 16) | CMOS logic control inputs | Active-low enables NC behavior; compatible with TTL/CMOS logic thresholds |
| S1–S4 (Pins 3, 6, 11, 14) | Source terminals (analog inputs) | Connected internally to common node in NC state; support bidirectional signal flow |
| D1–D4 (Pins 2, 7, 10, 15) | Drain terminals (analog outputs) | Deliver switched analog signal; matched impedance and capacitance across all channels |
| V+ (Pin 13) | Positive supply / substrate connection | Must be tied to highest potential rail; substrate bias improves latch-up immunity |
| V- (Pin 4) | Negative supply | Required for bipolar operation; sets lower analog rail limit and defines breakdown margin |
| GND (Pin 5) | Ground reference | Logic ground return; separate from analog signal ground in mixed-signal designs |
| N.C. (Pin 12) | No connect | Not internally bonded - must remain unconnected per datasheet specification |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic CMOS construction | Eliminates discrete component matching errors and reduces board area vs. discrete FET arrays |
| Low charge injection (±10pC) | Minimizes voltage step on hold capacitors in precision data acquisition systems |
| CMOS-input compatibility | Reduces drive requirements and eliminates external level shifters in microcontroller-based control |
| Bipolar or single-supply operation | Enables reuse across legacy ±15V test gear and modern +24V industrial I/O modules |
| 44V breakdown rating | Supports 30Vpp analog signals with 14V safety margin - critical for MIL-STD-461E compliance |
Applications
| Sample-and-Hold Circuits | Test Equipment |
|---|---|
Use Scenario: Capturing fast transient waveforms in automated test systems with sub-microsecond aperture times. IC Role / Device Role / Timing Role: DG309DJ acts as the precision sampling gate, providing NC default closure and rapid channel isolation during hold phase. Use Value: 60Ω rDS(ON) and ±10pC charge injection ensure <0.01% gain error and <1LSB settling error in 12-bit ADC front-ends. |
Use Scenario: Signal routing matrix in benchtop multimeters and signal analyzers requiring reconfigurable analog paths. IC Role / Device Role / Timing Role: DG309DJ serves as a low-distortion analog multiplexer core, enabling simultaneous channel calibration and measurement sequencing. Use Value: 78dB off-isolation and 27pF total channel capacitance maintain >60dB SFDR up to 500kHz input frequencies. |
| Military Radios | Guidance and Control Systems |
Use Scenario: Antenna switching and IF signal conditioning in ruggedized HF/VHF transceivers operating across extended temperature ranges. IC Role / Device Role / Timing Role: DG309DJ functions as a fail-safe RF front-end switch, maintaining continuity during power-up or control loss due to NC design. Use Value: -40°C to +85°C rating and 44V breakdown withstand surge events per MIL-STD-1275B without derating. |
Use Scenario: Sensor signal selection and redundancy management in inertial navigation units with dual-axis gyros and accelerometers. IC Role / Device Role / Timing Role: DG309DJ routes analog outputs from redundant sensors to fault-tolerant ADCs, leveraging NC default for safe startup states. Use Value: Matched channel parameters (rDS(ON), tON/tOFF) ensure <10ns skew between parallel sensor paths for real-time fusion algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG409BRZ | Quad SPST, NC; 35Ω rDS(ON); 16-pin SOIC only; requires ±15V or +12V single supply | Lower on-resistance but narrower supply range; no DIP option limits legacy board reuse | Select when lower distortion is prioritized and SOIC packaging is acceptable |
| TS5A23157DCUR | Dual SPDT (not quad SPST); 0.9Ω rDS(ON); 3–5.5V single supply only; 10-pin VSSOP | Higher channel density but incompatible topology and voltage range; unsuitable for ±15V systems | Choose only for low-voltage, space-constrained digital I/O switching - not a functional substitute |
Compared with ADG409BRZ and TS5A23157DCUR, the DG309DJ uniquely supports wide bipolar supplies, DIP packaging, and NC default behavior - making it irreplaceable in MIL-spec analog routing where fail-safe continuity and through-hole reliability are mandatory.
Availability
DG309DJ is available at Aetrix Electronics and suitable for military radios, guidance and control systems, test equipment, and sample-and-hold circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG309DJ 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and defense applications.
The DG309DJ belongs to Maxim's legacy analog switch family engineered for high-reliability signal routing in military and aerospace systems - emphasizing rail-to-rail operation, latch-up immunity, and extended temperature performance.
FAQ
What is the logic polarity of DG309DJ control inputs?
The DG309DJ features active-low logic control: when IN1–IN4 are at logic low (≤0.8V), the corresponding S–D channel is closed (conducting); at logic high (≥2.0V), the channel opens (non-conducting). This NC behavior ensures default signal continuity during power-up or controller reset - a critical safety feature in guidance and military radio applications where signal loss must be avoided.
Does DG309DJ support single-supply operation, and what are the limitations?
Yes, DG309DJ supports +5V to +30V single-supply operation, with V- tied to GND. However, datasheet notes confirm slower switching speed and increased rDS(ON) versus bipolar mode. For example, tON rises to ~200ns and rDS(ON) increases to ~100Ω at +30V/GND - acceptable for DC-coupled sensor interfaces but not for high-frequency AC signals above 100kHz.
What is the purpose of the N.C. pin (Pin 12) on DG309DJ?
Pin 12 on DG309DJ is explicitly marked "N.C." (No Connect) in the official pin description and must remain unconnected on the PCB. It is not internally bonded and has no electrical function. Connecting Pin 12 risks unintended current paths or noise coupling, violating Maxim's layout guidelines and potentially degrading off-isolation or increasing leakage beyond spec.
How does DG309DJ achieve 44V breakdown rating with ±15V supplies?
The DG309DJ's 44V breakdown rating refers to the maximum voltage difference allowed between V+ and V− pins - not the analog signal swing. With ±15V supplies (30V total), the 44V rating provides 14V headroom for transients. This margin enables reliable operation in MIL-STD-1275B automotive and MIL-STD-461E EMI environments where voltage spikes exceed nominal rails.
Can DG309DJ be used in bidirectional analog signal paths?
Yes, DG309DJ supports fully bidirectional analog signal flow: S and D terminals are interchangeable, with identical rDS(ON), capacitance, and leakage specifications in either direction. This symmetry is confirmed in the datasheet's electrical characteristics table and typical operating curves - essential for applications like programmable-gain amplifier feedback networks and loopback test paths in communications systems.
DG309DJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 5V ~ 30V
- Voltage - Supply, Dual (V±):
- ±5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 250ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- -10pC
- Channel Capacitance (CS(off), CD(off)):
- 11pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 5nA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
DG309DJ FAQ
1.How can I place an order for DG309DJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG309DJ 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 DG309DJ reliable?
The price and inventory of DG309DJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG309DJ is usually 5 days.
3.What payment methods are accepted for DG309DJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG309DJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG309DJ?
DG309DJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG309DJ 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 DG309DJ?
For technical support, including DG309DJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG309DJ requirements.
6.How does Aetrix verify that DG309DJ is sourced from the original manufacturer or authorized distributors?
All DG309DJ 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 DG309DJ meets industry standards.
7.What is the process for return or replacement of DG309DJ?
All DG309DJ units undergo pre-shipment inspection (PSI). If there is an issue with DG309DJ, 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 DG309DJ part is unused and in its original packaging.
Return procedure for DG309DJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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