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Analog Devices Inc./Maxim Integrated MAX394CAP
- Part No.:
- MAX394CAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX394CAP.pdf
- Description:
- IC SWITCH SPDT X 4 35OHM 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,391
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Product details
Overview
The MAX394CAP from Analog Devices is a precision, low-voltage, quad SPDT analog switch designed for rail-to-rail signal routing in portable and test instrumentation. It operates from ±2.7V to ±8V bipolar or +2.7V to +15V single supply, delivers <35Ω max on-resistance with <2Ω channel matching, and features 10pC max charge injection-enabling high-fidelity audio and precision measurement signal paths.
For engineers reviewing the MAX394CAP datasheet, MAX394CAP pinout, MAX394CAP application, or MAX394CAP equivalent, this device is selected for low-leakage, low-distortion analog switching where guaranteed on-resistance flatness (Δ4Ω max), break-before-make timing (10ns typ), and TTL/CMOS-compatible logic inputs are critical in battery-powered or multi-supply systems.
Technical Context
The MAX394CAP implements four independent CMOS SPDT switches fabricated in a low-voltage silicon-gate process. Each switch supports rail-to-rail analog signals between V+ and V−, with logic inputs tolerant of +0.8V to +2.4V (up to +8V supplies) or +0.8V to +4V (higher supplies).
Its architecture guarantees matched on-resistance (<2Ω), flat on-resistance over signal range (Δ4Ω max), and ultra-low charge injection (10pC max), enabling accurate sampling and minimal signal corruption in multiplexed data acquisition and audio routing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±2.7V to ±8V bipolar or +2.7V to +15V single supply - enables operation across industrial, portable, and mixed-signal systems without level-shifting. |
| On-Resistance (max) | 35Ω at ±4.5V - ensures minimal insertion loss and voltage drop in signal paths up to ±3.5V analog swing. |
| On-Resistance Match | <2Ω between channels - critical for matched gain/attenuation in differential or multi-channel instrumentation front-ends. |
| Charge Injection | 10pC max - limits voltage glitch on sampled-hold capacitors, supporting ≤12-bit accuracy in precision ADC drivers. |
| Off-Leakage Current | 2.5nA max at +85°C - preserves signal integrity in high-impedance sensor interfaces and battery-monitoring circuits. |
| Switching Speed | tON <130ns, tOFF <75ns - supports multiplexing of audio, video, or control signals up to ~5MHz bandwidth. |
| ESD Rating | >2000V per Method 3015.7 - provides robust handling during board assembly and field service without external protection. |
Pinout & Package
MAX394CAP is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, optimized for space-constrained PCB layouts while maintaining thermal and electrical performance comparable to SO and TSSOP variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10, 11, 20 | IN1–IN4 | CMOS/TTL-compatible digital control inputs - accept logic thresholds from +0.8V to +2.4V (≤+8V supply) or +0.8V to +4V (higher supply), enabling direct microcontroller interfacing. |
| 2, 9, 12, 19 | NO1–NO4 | Normally open analog terminals - connect to COM when corresponding IN is high; isolated from COM when IN is low. |
| 3, 8, 13, 18 | COM1–COM4 | Common analog poles - serve as bidirectional signal ports routed to NO or NC based on logic state; support rail-to-rail voltage swing. |
| 4, 7, 14, 17 | NC1–NC4 | Normally closed analog terminals - connect to COM when corresponding IN is low; isolated when IN is high. |
| 5 | V− | Negative power supply pin - must be connected before analog signals to prevent latch-up; supports −0.3V to −17V absolute max rating. |
| 6 | GND | Ground reference - serves as return path for logic and analog currents; requires low-impedance connection to minimize noise coupling. |
| 15 | N.C. | No internal connection - left unconnected; no electrical function or thermal role. |
| 16 | V+ | Positive power supply pin - supports +2.7V to +15V operation; substrate tied internally to V+, requiring stable bypassing near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports continuous analog voltages from V− to V+ - eliminates need for external clamping or level-shifting in ±5V or +3.3V systems. |
| Guaranteed on-resistance flatness | Δ4Ω max over full analog signal range - maintains consistent gain/attenuation across input amplitude, critical for audio fidelity and sensor linearity. |
| Break-before-make switching | 10ns typical delay - prevents momentary shorting between NO and NC paths, avoiding signal transients in multiplexer-based signal chains. |
| Ultra-low quiescent current | <1μA with all inputs high or low - extends battery life in portable instruments and handheld test equipment. |
| TTL/CMOS logic compatibility | Valid input thresholds (+0.8V to +2.4V) across full temperature range - ensures reliable control from standard microcontrollers without interface buffers. |
Applications
| Test Equipment | Audio Signal Routing |
|---|---|
Use Scenario: Automated test systems use multiplexed analog paths to route calibration signals, DUT outputs, or reference voltages to measurement instruments. IC Role / Device Role / Timing Role: Quad SPDT switch providing reconfigurable signal paths between sources and meters with minimal crosstalk and leakage. Use Value: Guaranteed 2.5nA off-leakage at +85°C and 88dBm crosstalk enable sub-mV-level accuracy in multichannel parametric testers. |
Use Scenario: Portable audio mixers and effects processors require low-noise, low-distortion switching of line-level or headphone signals. IC Role / Device Role / Timing Role: Precision analog switch routing stereo channels, effects loops, or input selection without audible click/pop. Use Value: 10pC max charge injection and Δ4Ω on-resistance flatness preserve dynamic range and frequency response up to 20kHz. |
| Communications Systems | Portable Instruments |
Use Scenario: Baseband signal conditioning in wireless infrastructure or PBX systems demands fast, low-leakage switching of IF or control lines. IC Role / Device Role / Timing Role: High-speed analog switch managing antenna diversity paths, filter banks, or gain-setting networks. Use Value: tOFF <75ns and 66dBm off-isolation ensure clean signal separation in 1–10MHz RF front-end bias and control paths. |
Use Scenario: Handheld multimeters, oscilloscopes, and data loggers require low-power, high-accuracy analog multiplexing for sensor inputs. IC Role / Device Role / Timing Role: Low-quiescent-current SPDT switch selecting between thermocouples, RTDs, or voltage ranges in battery-operated units. Use Value: <1μA supply current and 2.5nA leakage at +85°C extend operating time and maintain measurement stability over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX333ACPP | Pin-compatible but higher on-resistance (100Ω typ), wider temp range (−40°C to +85°C), no SSOP option. | Better suited for general-purpose switching where precision matching and low charge injection are secondary. | Select MAX333ACPP only if legacy DIP footprint is required and 35Ω on-resistance is not critical. |
| ADG1414BRUZ | Higher supply voltage (±15V), lower on-resistance (1.8Ω typ), but higher charge injection (12pC) and no guaranteed flatness spec. | Preferred for high-voltage industrial I/O modules needing lower RON, but less suitable for precision sampling. | Choose ADG1414BRUZ when driving high-impedance loads at ±12V, but verify charge injection impact on hold capacitor settling. |
Compared with MAX394CAP, MAX333ACPP trades precision (higher RON, no flatness guarantee) for broader temperature tolerance and legacy packaging, while ADG1414BRUZ offers superior RON at higher voltage but sacrifices charge injection performance critical for data acquisition.
Availability
MAX394CAP is available at Aetrix Electronics and suitable for test equipment, portable instruments, communications systems, and audio signal routing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX394CAP 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.
The MAX394CAP belongs to Analog Devices' precision analog switch family, engineered specifically for low-distortion, low-leakage signal routing in battery-powered and multi-supply test and measurement applications.
FAQ
What supply voltage ranges does the MAX394CAP support?
The MAX394CAP supports bipolar supplies from ±2.7V to ±8V and single supplies from +2.7V to +15V. Its analog signal range extends rail-to-rail between V+ and V−, and logic inputs remain compatible across this full range - with thresholds specified as +0.8V to +2.4V (for supplies ≤+8V) or +0.8V to +4V (for higher supplies). This flexibility allows direct integration into both legacy ±5V and modern +3.3V/+5V systems without level shifters.
Does the MAX394CAP have guaranteed on-resistance matching between channels?
Yes, the MAX394CAP guarantees on-resistance matching of less than 2Ω between any two channels at +25°C, and less than 4Ω over the full operating temperature range (0°C to +70°C for the CAP variant). This specification is measured under defined conditions (V+ = 5V, V− = −5V, ICOM = 10mA, VNO/VNC = ±3V) and ensures consistent signal attenuation across multiplexed paths in instrumentation and audio applications.
What is the maximum charge injection of the MAX394CAP, and why does it matter?
The MAX394CAP guarantees maximum charge injection of 10pC. This parameter quantifies the transient charge injected onto the COM node during switching, which can cause voltage glitches on downstream capacitive nodes (e.g., sample-and-hold circuits or ADC input capacitors). At 10pC, the resulting glitch remains below 1LSB for 12-bit systems using ≥1nF hold capacitors - making the MAX394CAP suitable for precision data acquisition front-ends where signal integrity is critical.
Is the MAX394CAP pin-compatible with other devices in the MAX394 family?
Yes, the MAX394CAP shares identical pinout and functionality with all 20-pin MAX394 variants including MAX394CPP (DIP), MAX394CWP (SO), and MAX394EAP+ (SSOP). All share the same pin configuration: IN1–IN4 (1,10,11,20), NO1–NO4 (2,9,12,19), COM1–COM4 (3,8,13,18), NC1–NC4 (4,7,14,17), V− (5), GND (6), N.C. (15), and V+ (16). This enables drop-in replacement across package types without PCB redesign.
What is the off-leakage current specification for the MAX394CAP at elevated temperature?
The MAX394CAP guarantees NC or NO off-leakage current of ±2.5nA maximum at +85°C, tested per Note 5 in the datasheet. This leakage is 100% production-tested at maximum rated hot temperature and correlated at room temperature. Such low leakage preserves accuracy in high-impedance sensor interfaces (e.g., pH probes, photodiode amplifiers) and battery-monitoring circuits where even nanoamp-level errors degrade measurement fidelity.
MAX394CAP 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:
- 4
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 500mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 15V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 130ns, 75ns
- -3db Bandwidth:
- -
- Charge Injection:
- 3pC
- Channel Capacitance (CS(off), CD(off)):
- 12pF, 12pF
- Current - Leakage (IS(off)) (Max):
- 200pA
- Crosstalk:
- -88dB @ 1MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
MAX394CAP FAQ
1.How can I place an order for MAX394CAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX394CAP 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 MAX394CAP reliable?
The price and inventory of MAX394CAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX394CAP is usually 5 days.
3.What payment methods are accepted for MAX394CAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX394CAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX394CAP?
MAX394CAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX394CAP 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 MAX394CAP?
For technical support, including MAX394CAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX394CAP requirements.
6.How does Aetrix verify that MAX394CAP is sourced from the original manufacturer or authorized distributors?
All MAX394CAP 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 MAX394CAP meets industry standards.
7.What is the process for return or replacement of MAX394CAP?
All MAX394CAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX394CAP, 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 MAX394CAP part is unused and in its original packaging.
Return procedure for MAX394CAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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