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Analog Devices Inc./Maxim Integrated MAX4638ETE+
- Part No.:
- MAX4638ETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX4638ETE+.pdf
- Description:
- IC MUX 8:1 3.5OHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,769
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Product details
Overview
MAX4638ETE+ from Maxim Integrated is a single 8:1 CMOS analog multiplexer with rail-to-rail signal handling, 3.5Ω on-resistance at +5V supply, -75dB off-isolation, and 18ns turn-on time. It operates from +1.8V to +5.5V single supply or ±2.5V dual supplies and guarantees break-before-make switching for precision signal routing in portable instrumentation.
For engineers reviewing the MAX4638ETE+ datasheet, MAX4638ETE+ pinout, MAX4638ETE+ application, or MAX4638ETE+ equivalent, this page delivers verified electrical parameters, package-specific terminal mapping, real-world use scenarios, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX4638ETE+ implements a 3-bit binary decoder (A0–A2) to select one of eight bidirectional analog inputs (NO1–NO8) to a common output (COM), with TTL/CMOS-compatible EN control enabling full device disable. All channels support rail-to-rail analog signals across the full supply range.
Its BiCMOS process ensures guaranteed 0.4Ω RON match and 1Ω RON flatness over signal range, while low 0.25nA leakage at +25°C and 85MHz bandwidth (typ.) support high-fidelity, low-distortion switching in battery-powered data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 3.5Ω at +5V supply - enables low insertion loss and minimal signal attenuation in precision analog paths |
| Off-Isolation | -75dB at 10MHz - suppresses crosstalk between inactive channels in multi-signal routing |
| Switching Time (tON/tOFF) | 18ns / 7ns - supports high-speed channel selection in automated test equipment |
| Analog Signal Range | Rail-to-rail (0V to V+) - preserves full dynamic range of input signals without clipping |
| Leakage Current (ICOM_(OFF)) | ±0.25nA at +25°C - minimizes DC error in high-impedance sensor interfaces |
| Supply Voltage Range | +1.8V to +5.5V single supply - compatible with Li-ion, 3.3V, and 5V logic domains |
| Break-Before-Make Delay | 1ns minimum - prevents momentary shorting during channel transitions |
Pinout & Package
MAX4638ETE+ is housed in a 16-pin TQFN-EP (4mm × 4mm) package with exposed pad connected to V−. Pin 1 is A0; pin 2 is V−; pins 3–6 are NO1–NO4; pin 7 is COM; pins 8–11 are NO8–NO5; pin 12 is V+; pin 13 is GND; pin 14 is EN; pin 15 is A1; pin 16 is A2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | 3-bit binary address inputs | Selects one of eight analog channels (NO1–NO8) to COM using standard BCD decoding |
| EN | Active-high enable input | Disables all switches when low; simplifies cascading and power-gating in multi-mux systems |
| NO1–NO8 | Bidirectional analog inputs | Accept rail-to-rail signals up to V+; support both sourcing and sinking current (±100mA continuous) |
| COM | Common bidirectional analog output | Routes selected channel signal with <1Ω RON flatness - critical for gain accuracy in PGA front-ends |
| V+, V−, GND | Power and reference terminals | V+ and V− define analog signal range; GND is digital ground reference; exposed pad must connect to V− for thermal and noise performance |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Maintains full input/output voltage swing from V− to V+, eliminating level-shifting in low-voltage systems |
| Guaranteed 0.4Ω RON match | Ensures consistent gain and offset across channels in multi-channel calibration or averaging circuits |
| 1Ω RON flatness over signal range | Minimizes harmonic distortion (<0.5% THD) in audio and sensor signal paths |
| 0.25nA max COM off-leakage | Reduces measurement drift in high-impedance medical electrode or pH sensor interfaces |
| Break-before-make switching | Prevents signal shorting during channel changes - essential for relay replacement in safety-critical systems |
Applications
| Automatic Test Equipment | Portable Medical Instrumentation |
|---|---|
Use Scenario: Multiplexing multiple sensor outputs (ECG leads, temperature probes) into a shared ADC channel. IC Role / Device Role / Timing Role: Analog signal router selecting one of eight biopotential inputs to a precision SAR ADC. Use Value: 3.5Ω RON and 0.25nA leakage preserve microvolt-level signal integrity and baseline stability. |
Use Scenario: Battery-powered handheld glucose meter with multi-electrode strip interface. IC Role / Device Role / Timing Role: Low-power analog switch enabling sequential electrode excitation and sensing under +3.3V operation. Use Value: +1.8V min supply and 1µA I+ allow >100-hour operation on coin-cell batteries. |
| Audio Signal Routing | Low-Voltage Data Acquisition |
Use Scenario: Selecting between eight line-level audio sources (microphones, instruments) before amplification. IC Role / Device Role / Timing Role: Bidirectional analog mux preserving AC-coupled signal fidelity with <0.5% THD. Use Value: 85MHz bandwidth and -85dB crosstalk prevent audible artifacts and inter-channel bleed. |
Use Scenario: Industrial sensor node aggregating thermocouple, RTD, and strain gauge readings onto one ADC. IC Role / Device Role / Timing Role: Precision analog switch with guaranteed RON match and flatness for ratiometric measurements. Use Value: 0.4Ω RON match and 1Ω flatness ensure <0.01% gain error across all eight channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1408BRUZ | 8:1 mux, 4.7Ω RON at +5V, -72dB off-isolation, 20ns tON, SO-16 package | Higher RON and slower switching limit use in high-speed or ultra-low-distortion paths | Preferred where SO-16 footprint compatibility is required and 4.7Ω RON is acceptable |
| TS5A3159DCKR | Single SP8T, 0.75Ω RON at +3.3V, -65dB off-isolation, 10ns tON, SC70-6 package | Lower RON but reduced off-isolation and no dual-supply operation limits high-precision AC coupling | Optimal for space-constrained +3.3V systems needing lowest possible on-resistance |
Compared with ADG1408BRUZ and TS5A3159DCKR, the MAX4638ETE+ uniquely balances ultra-low leakage (0.25nA), rail-to-rail operation, and guaranteed break-before-make timing - making it the only choice for battery-powered medical devices requiring long-term DC stability and safe channel switching.
Availability
MAX4638ETE+ is available at Aetrix Electronics and suitable for automatic test equipment, portable medical instrumentation, audio signal routing, and low-voltage data-acquisition systems requiring stable component supply and long-term manufacturability.
Supply support for MAX4638ETE+ 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 industrial, medical, and communications applications.
The MAX4638/MAX4639 family was engineered for low-voltage, high-fidelity analog signal routing in battery-powered and portable instrumentation - emphasizing rail-to-rail operation, sub-nanoampere leakage, and guaranteed switching behavior.
FAQ
What is the maximum supply voltage rating for MAX4638ETE+?
The absolute maximum rating for V+ to V− is +6V. Operation beyond this risks permanent damage. The recommended operating range is +1.8V to +5.5V for single-supply use or ±2.5V for dual-supply configurations. Exceeding these limits, even briefly, may degrade the 3.5Ω RON specification or increase leakage beyond the guaranteed 0.25nA at +25°C.
Does MAX4638ETE+ support true bidirectional signal flow?
Yes, MAX4638ETE+ supports fully bidirectional analog signal routing: any NOx pin or COM can serve as input or output. This is enabled by its CMOS transmission-gate architecture and rail-to-rail capability. Signals up to V+ or down to V− pass with identical 3.5Ω RON and <1Ω flatness - critical for applications like sensor excitation and return path switching in MAX4638ETE+ designs.
How does the exposed pad on the MAX4638ETE+ TQFN package function?
The exposed pad (EP) on the MAX4638ETE+ TQFN package must be soldered to V− for optimal thermal dissipation and low-noise performance. It is not electrically isolated and forms part of the internal V− connection. Leaving it floating or connecting it to GND violates the datasheet requirement and may cause increased thermal resistance, higher junction temperature, and degraded 0.25nA leakage specification in MAX4638ETE+ units.
Can MAX4638ETE+ operate reliably at +1.8V supply?
Yes, MAX4638ETE+ is fully specified from +1.8V to +5.5V. At +1.8V, RON increases to ~6Ω (vs. 3.5Ω at +5V), but all logic thresholds, leakage, and switching times remain guaranteed across temperature. This makes MAX4638ETE+ suitable for ultra-low-power systems such as coin-cell–powered environmental sensors where supply headroom is constrained.
What is the purpose of the break-before-make timing in MAX4638ETE+?
The guaranteed 1ns minimum break-before-make interval prevents momentary shorting between two analog channels during address transitions. This eliminates transient glitches and cross-talk in sensitive applications like ECG front-ends or programmable gain amplifier (PGA) gain-switching networks. Without this feature, simultaneous conduction could corrupt measurements - a key reliability advantage of MAX4638ETE+ over generic analog switches.
MAX4638ETE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX4638ETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4638ETE+ 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+ reliable?
The price and inventory of MAX4638ETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4638ETE+ is usually 5 days.
3.What payment methods are accepted for MAX4638ETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4638ETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4638ETE+?
MAX4638ETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4638ETE+ 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+?
For technical support, including MAX4638ETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4638ETE+ requirements.
6.How does Aetrix verify that MAX4638ETE+ is sourced from the original manufacturer or authorized distributors?
All MAX4638ETE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX4638ETE+?
All MAX4638ETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4638ETE+, 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+ part is unused and in its original packaging.
Return procedure for MAX4638ETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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