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Analog Devices Inc./Maxim Integrated MAX4638ETE+T
- Part No.:
- MAX4638ETE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX4638ETE+T.pdf
- Description:
- IC MUX 8:1 3.5OHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,741
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Product details
Overview
MAX4638ETE+T from Maxim Integrated is a single 8:1 CMOS analog multiplexer with 3.5Ω on-resistance at +5V supply, -75dB off-isolation, and 18ns turn-on time, designed for low-voltage signal routing in portable instrumentation and battery-powered data-acquisition systems.
For engineers reviewing the MAX4638ETE+T datasheet, MAX4638ETE+T pinout, MAX4638ETE+T application, or MAX4638ETE+T equivalent, key selection criteria include guaranteed break-before-make switching, rail-to-rail analog signal handling, ±2.5V dual-supply compatibility, and TQFN-EP package thermal performance.
Technical Context
The MAX4638ETE+T implements a single-pole, eight-throw (SP8T) analog switch architecture using BiCMOS process technology. It decodes 3-bit BCD address inputs (A0–A2) to select one of eight bidirectional analog channels (NO1–NO8) to a common COM terminal, with EN enabling/disabling all paths simultaneously.
It supports single-supply operation from +1.8V to +5.5V and dual-supply operation at ±2.5V, maintaining guaranteed 0.25nA leakage at +25°C and 1Ω RON flatness over full signal range - critical for precision multiplexed ADC front-ends and audio channel switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 3.5Ω at +5V supply - ensures minimal voltage drop and gain error in precision sensor signal paths |
| Off-Isolation | -75dB at 10MHz - suppresses crosstalk between inactive channels in high-frequency multiplexed systems |
| Switching Time (tON) | 18ns - enables fast channel scanning in automated test equipment with >50MHz effective sampling rate |
| Analog Signal Range | Rail-to-rail (0V to V+) - supports full-scale input signals without clipping in single-supply systems |
| Leakage Current | ±0.25nA at +25°C - preserves accuracy in high-impedance medical sensor interfaces and pH meter front-ends |
| Bandwidth (-3dB) | 85MHz - maintains integrity of video sync pulses and wideband audio signals up to 20MHz fundamental |
| Supply Range | +1.8V to +5.5V single or ±2.5V dual - enables direct integration with Li-ion battery rails and legacy ±5V systems |
Pinout & Package
MAX4638ETE+T is housed in a 4mm × 4mm, 16-pin TQFN-EP package with exposed pad (EP) connected to V− for thermal and noise performance. The package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15, 16 | A0, A1, A2 | 3-bit binary address inputs selecting NO1–NO8 channel; TTL/CMOS-compatible thresholds |
| 2 | EN | Active-high enable controlling all switches; disables all paths when low |
| 3 | V− | Negative supply pin; EP must be connected to this node for optimal thermal dissipation |
| 4–7 | NO1–NO4 | Bidirectional analog inputs; support rail-to-rail signal swing with matched RON |
| 8 | COM | Common analog output/input; connects to selected NOx channel when enabled |
| 9–12 | NO8–NO5 | Bidirectional analog inputs; numbered in reverse physical order per datasheet top view |
| 13 | V+ | Positive supply pin; accepts +1.8V to +5.5V for single-supply operation |
| 14 | GND | Digital ground reference; separate from analog return but tied internally to V− in single-supply config |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RON match | 0.4Ω max between channels - minimizes gain mismatch in multi-channel calibration systems |
| Break-before-make switching | 1ns minimum dead time - prevents momentary short-circuits during channel transitions |
| RON flatness | 1Ω max over full signal range - preserves linearity in 16-bit ADC applications across 0–V+ span |
| Low charge injection | 13pC - reduces settling error and droop in sample-and-hold circuits after channel change |
| TTL/CMOS logic compatibility | VIH = 2.4V, VIL = 0.8V at +5V - allows direct interfacing with FPGA I/O banks and microcontroller GPIOs |
Applications
| Automatic Test Equipment | Medical Instrumentation |
|---|---|
|
Use Scenario: High-speed channel scanning of sensor arrays in benchtop DMMs and parametric testers. IC Role / Device Role / Timing Role: SP8T analog switch routing multiple transducer outputs to shared ADC input. Use Value: 18ns tON and 85MHz bandwidth enable sub-20ns per-channel acquisition with <0.01% gain error. |
Use Scenario: Multiplexing ECG, EEG, and temperature sensor signals into a low-power wearable monitor. IC Role / Device Role / Timing Role: Low-leakage analog mux selecting biopotential inputs while preserving DC accuracy. Use Value: ±0.25nA leakage and rail-to-rail operation maintain µV-level signal fidelity at battery voltages down to +1.8V. |
| Audio Signal Routing | Portable Data Acquisition |
|
Use Scenario: Dynamic reconfiguration of microphone and line-in paths in professional audio mixers. IC Role / Device Role / Timing Role: Bidirectional analog switch handling AC-coupled audio with minimal THD. Use Value: 0.5% THD at 10kHz and -85dB crosstalk prevent audible artifacts during real-time channel switching. |
Use Scenario: Battery-powered environmental sensor hub aggregating thermocouple, RTD, and humidity readings. IC Role / Device Role / Timing Role: Precision multiplexer feeding low-noise instrumentation amplifier inputs. Use Value: 3.5Ω RON and 1Ω flatness ensure <1 LSB error in 24-bit sigma-delta ADC systems at 25°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1408BRUZ | 4.5Ω RON, +3V to +16.5V supply, no dual-supply mode, 16-TSSOP only | Higher supply range suits industrial PLC I/O modules; lacks ±2.5V operation for portable designs | Select ADG1408BRUZ when wider voltage headroom is required and TQFN thermal performance is not critical |
| TS5A23157DGSR | 0.9Ω RON at +3.3V, 10ns tON, but only 4:1 configuration and 0.5pF COFF | Better speed and capacitance for high-frequency RF switching, but lacks 8:1 density for sensor aggregation | Select TS5A23157DGSR for compact 4-channel routing where ultra-low RON and COFF outweigh channel count needs |
Compared with ADG1408BRUZ and TS5A23157DGSR, MAX4638ETE+T uniquely balances 8-channel density, ±2.5V dual-supply support, and guaranteed break-before-make timing - making it optimal for portable, multi-sensor systems requiring both flexibility and precision.
Availability
MAX4638ETE+T is available at Aetrix Electronics and suitable for automatic test equipment, medical instrumentation, and portable data-acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4638ETE+T 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX4638 series belongs to Maxim's precision analog switch product line, engineered for low-voltage, low-leakage, and high-bandwidth signal routing in portable and battery-constrained applications.
FAQ
What is the maximum supply voltage rating for MAX4638ETE+T?
The absolute maximum rating for V+ to V− is +6V. For reliable operation, the recommended single-supply range is +1.8V to +5.5V, and dual-supply operation is specified at ±2.5V. Exceeding these limits risks permanent damage, and the device guarantees performance only within the datasheet-specified conditions for MAX4638ETE+T.
Does MAX4638ETE+T support break-before-make switching, and is it guaranteed?
Yes, MAX4638ETE+T guarantees break-before-make operation with a minimum 1ns dead time between channel disconnect and connect events. This is verified across temperature and supply voltage ranges and prevents signal shorting during address transitions - a critical feature confirmed in the MAX4638ETE+T truth table and timing diagrams.
What is the thermal design requirement for the exposed pad on MAX4638ETE+T?
The exposed pad (EP) of MAX4638ETE+T must be soldered to a PCB copper pour connected to V−. This connection provides primary thermal conduction path and reduces junction-to-board thermal resistance by ~30°C/W. Failure to connect EP to V− degrades power dissipation capability and may cause thermal shutdown in sustained 100mA load conditions.
Can MAX4638ETE+T operate with a +3.3V supply, and what is its on-resistance at that voltage?
Yes, MAX4638ETE+T operates across +1.8V to +5.5V. At +3.3V single supply, typical RON is 6Ω (max 8Ω), with 0.6Ω matching and 2.5Ω flatness - values explicitly characterized in the +3.0V Electrical Characteristics table of the MAX4638ETE+T datasheet.
How does MAX4638ETE+T handle rail-to-rail analog signals, and what is the practical signal range?
MAX4638ETE+T supports true rail-to-rail analog signal handling: input/output voltage range extends from V− to V+, including 0V to V+ in single-supply mode. With V− = GND and V+ = +5V, signals from 0V to +5V pass without clipping - verified by the "Analog Signal Range" parameter (0 to V+) in all supply configurations for MAX4638ETE+T.
MAX4638ETE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 3.5Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- ±2.5V
- Switch Time (Ton, Toff) (Max):
- 18ns, 7ns
- -3db Bandwidth:
- 50MHz
- Charge Injection:
- 13pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF, 40pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -85dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (4x4)
MAX4638ETE+T FAQ
1.How can I place an order for MAX4638ETE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4638ETE+T 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 MAX4638ETE+T reliable?
The price and inventory of MAX4638ETE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4638ETE+T is usually 5 days.
3.What payment methods are accepted for MAX4638ETE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4638ETE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4638ETE+T?
MAX4638ETE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4638ETE+T 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 MAX4638ETE+T?
For technical support, including MAX4638ETE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4638ETE+T requirements.
6.How does Aetrix verify that MAX4638ETE+T is sourced from the original manufacturer or authorized distributors?
All MAX4638ETE+T 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 MAX4638ETE+T meets industry standards.
7.What is the process for return or replacement of MAX4638ETE+T?
All MAX4638ETE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4638ETE+T, 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 MAX4638ETE+T part is unused and in its original packaging.
Return procedure for MAX4638ETE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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