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Analog Devices Inc./Maxim Integrated MAX318CSA
- Part No.:
- MAX318CSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX318CSA.pdf
- Description:
- IC SWITCH SPST-NOX1 35OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,909
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Product details
Overview
MAX318CSA from Maxim Integrated is a precision CMOS single-pole single-throw (SPST) analog switch with normally open (NO) configuration, 35Ω maximum on-resistance, <10pC charge injection, and ±4.5V to ±20V bipolar or +10V to +30V single-supply operation. It enables rail-to-rail signal routing in high-fidelity sample-and-hold circuits and military-grade communications systems.
For engineers reviewing the MAX318CSA datasheet, MAX318CSA pinout, MAX318CSA application, or MAX318CSA equivalent, key selection criteria include guaranteed on-resistance matching (<2Ω), low +85°C off-leakage (<6nA), fast switching (tON <175ns), and SO-8 package compatibility with automated PCB assembly.
Technical Context
The MAX318CSA implements a silicon-gate CMOS transmission gate architecture optimized for minimal signal distortion across its full ±15V analog range. Its design guarantees flat on-resistance (∆3Ω max) and matched channel resistance (<2Ω) under bipolar supply conditions, enabling precise differential signal switching without gain error.
It features TTL/CMOS-compatible logic inputs (VINH = 2.4V, VINL = 0.8V), ESD protection >±2000V, and operates over 0°C to +70°C. The device supports unbalanced supplies (e.g., +24V/–5V) and requires V– tied to GND in single-supply mode with VL referenced to V+ for CMOS-level compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On Resistance | 35Ω max at TA = +25°C; ensures ≤0.35% gain error in 1kΩ load applications |
| On Resistance Match | <2Ω between channels; enables accurate ratiometric measurements in dual-path systems |
| Charge Injection | <10pC; limits voltage glitch to <1mV on 10nF hold capacitors |
| Off-Leakage Current | <6nA at +85°C; preserves >16-bit settling accuracy over temperature in precision data acquisition |
| Switching Speed | tON <175ns, tOFF <145ns; supports ≥5MHz sampling in high-speed test equipment |
| Analog Signal Range | ±15V with ±15V supplies; delivers true rail-to-rail operation without clipping |
| ESD Rating | >±2000V per Method 3015.7; eliminates need for external protection in ruggedized designs |
Pinout & Package
MAX318CSA is housed in an 8-pin SO (Small Outline) package with 1.27mm lead pitch, compliant with JEDEC MS-012, measuring 4.9mm × 3.9mm × 1.75mm. It is RoHS-compliant and rated for surface-mount reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | COM | Analog common terminal - connects to signal source or load in SPST NO topology |
| 2 | N.C. | No internal connection - must be left floating or grounded per layout best practices |
| 3 | GND | Logic ground reference - decoupling capacitor required within 5mm of pin for noise immunity |
| 4 | V+ | Positive analog supply - sets upper rail of analog signal range; must be ≥|V–| for bipolar operation |
| 5 | VL | Logic supply input - set to 5V for TTL compatibility or to V+ for CMOS-level control |
| 6 | IN | Digital control input - active-high logic controls switch state (IN = HIGH → ON) |
| 7 | V– | Negative analog supply - sets lower rail; tie to 0V in single-supply configurations |
| 8 | NO | Normally open analog terminal - conducts only when IN is asserted; isolated otherwise |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog handling | Supports signals from V– to V+ without distortion - critical for ±12V industrial sensor interfaces |
| Guaranteed flat RON | ∆3Ω max over full analog range - maintains linearity in audio and instrumentation amplifiers |
| Bipolar/single-supply flexibility | Operates from ±4.5V to ±20V or +10V to +30V - simplifies power architecture in mixed-signal systems |
| TTL/CMOS logic compatibility | Accepts standard 5V logic thresholds - eliminates level-shifting in microcontroller-driven test fixtures |
| Low power consumption | 35µW typical - extends battery life in portable PBX and handheld test equipment |
Applications
| Sample-and-Hold Circuits | Guidance and Control Systems |
|---|---|
Use Scenario: Capturing transient analog signals from inertial measurement units (IMUs) in aerospace guidance platforms. IC Role / Device Role / Timing Role: Precision SPST switch isolating the hold capacitor during acquisition phase to prevent droop and charge injection errors. Use Value: <10pC charge injection and <6nA leakage at +85°C ensure sub-16-bit error over 10ms hold intervals. | Use Scenario: Routing feedback signals between flight control computers and servo actuators in UAV autopilot systems. IC Role / Device Role / Timing Role: High-reliability analog multiplexer enabling redundant signal path selection with break-before-make timing. Use Value: Guaranteed 5–13ns break-before-make interval prevents momentary short-circuits during failover transitions. |
| Heads-Up Displays | Test Equipment |
Use Scenario: Switching video sync and RGB analog signals in avionics HUD projectors operating in extended temperature environments. IC Role / Device Role / Timing Role: Low-distortion signal gate controlling display brightness modulation paths with minimal crosstalk. Use Value: 85dB crosstalk and 68dB off-isolation preserve color fidelity and eliminate ghosting artifacts. | Use Scenario: Automated signal routing in benchtop oscilloscopes and arbitrary waveform generators requiring nanosecond-scale switching. IC Role / Device Role / Timing Role: Fast-settling analog switch enabling multi-channel probe calibration and front-end attenuation selection. Use Value: 175ns turn-on time supports ≥5MHz channel switching without measurable aperture jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1419BRMZ | Higher on-resistance (4.7Ω typ), wider temp range (–40°C to +125°C), SPI interface | Requires digital control infrastructure; better suited for programmable filter banks than manual signal routing | Select for systems needing serial configurability and extended temperature operation |
| TS5A23157DCUR | Lower voltage rating (5.5V max), smaller 6-pin SC70 package, 0.9Ω on-resistance | Limited to low-voltage consumer electronics; incompatible with ±15V industrial signal chains | Select only for space-constrained, single-supply <5V applications where ultra-low RON is critical |
Compared with ADG1419BRMZ and TS5A23157DCUR, the MAX318CSA uniquely balances high-voltage rail-to-rail capability (±15V), sub-10pC charge injection, and SO-8 manufacturability - making it optimal for military radios and precision test gear where signal integrity and supply flexibility outweigh programmability or footprint size.
Availability
MAX318CSA is available at Aetrix Electronics and suitable for sample-and-hold circuits, guidance and control systems, and test equipment requiring stable component supply across extended production lifecycles.
Supply support for MAX318CSA 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, automotive, and communications markets.
The MAX317/MAX318/MAX319 family was engineered for precision analog signal routing in mission-critical systems demanding low distortion, high reliability, and wide supply voltage tolerance - particularly in defense electronics and automated test equipment.
FAQ
What is the maximum analog signal voltage range supported by the MAX318CSA?
The MAX318CSA supports analog signals from V– to V+, with a maximum breakdown voltage of +44V referenced to V–. Under ±15V dual-supply operation, this enables a full ±15V rail-to-rail signal range. In single-supply mode (+12V, V– = 0V), the range is 0V to +12V. Operation outside these bounds risks permanent damage per Absolute Maximum Ratings.
Does the MAX318CSA require external pull-up resistors on the IN pin?
No, the MAX318CSA does not require external pull-up resistors on the IN pin. Its TTL/CMOS-compatible input has guaranteed logic thresholds (VINH ≥ 2.4V, VINL ≤ 0.8V) and low input current (±0.5µA), allowing direct interfacing with microcontrollers and FPGAs. Pull-ups are unnecessary unless system-level noise immunity mandates them.
Can the MAX318CSA operate with unbalanced supplies such as +24V and –5V?
Yes, the MAX318CSA can operate with unbalanced supplies like +24V and –5V. The datasheet explicitly permits this configuration, provided the difference between V+ and V– does not exceed +44V. In such cases, the analog signal range becomes limited to V– to V+, i.e., –5V to +24V, and logic levels must be referenced accordingly.
What is the thermal performance of the MAX318CSA in SO-8 package at full load?
In its SO-8 package, the MAX318CSA has a thermal resistance θJA of 170°C/W. At maximum continuous power dissipation (471mW at +70°C), junction temperature rise is ~80°C above ambient - resulting in ~150°C junction temperature. Derating is required above +70°C (5.88mW/°C), and operation beyond +125°C junction is not recommended.
How does charge injection affect sample-and-hold accuracy in MAX318CSA-based designs?
With guaranteed <10pC charge injection, the MAX318CSA introduces ≤1mV error on a 10nF hold capacitor - directly impacting 12-bit+ resolution. To mitigate, use low-impedance drivers, minimize trace capacitance to the COM pin, and allow ≥100ns settling after switching before sampling. This behavior is confirmed in Figure 5 and Typical Operating Characteristics.
MAX318CSA 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:
- 1
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 2Ohm (Max)
- Voltage - Supply, Single (V+):
- 10V ~ 30V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 175ns, 145ns
- -3db Bandwidth:
- -
- Charge Injection:
- 3pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -85dB @ 1MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX318CSA FAQ
1.How can I place an order for MAX318CSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX318CSA 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 MAX318CSA reliable?
The price and inventory of MAX318CSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX318CSA is usually 5 days.
3.What payment methods are accepted for MAX318CSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX318CSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX318CSA?
MAX318CSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX318CSA 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 MAX318CSA?
For technical support, including MAX318CSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX318CSA requirements.
6.How does Aetrix verify that MAX318CSA is sourced from the original manufacturer or authorized distributors?
All MAX318CSA 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 MAX318CSA meets industry standards.
7.What is the process for return or replacement of MAX318CSA?
All MAX318CSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX318CSA, 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 MAX318CSA part is unused and in its original packaging.
Return procedure for MAX318CSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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