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Analog Devices Inc./Maxim Integrated MAX4638EGE
- Part No.:
- MAX4638EGE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX4638EGE.pdf
- Description:
- IC SW SP8T-NOX1 3.5OHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,723
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Product details
Overview
The MAX4638EGE 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-designed for low-voltage data-acquisition systems requiring precise channel selection and minimal signal distortion.
For engineers reviewing the MAX4638EGE datasheet, MAX4638EGE pinout, MAX4638EGE application, or MAX4638EGE equivalent, this device supports break-before-make switching, TTL/CMOS-compatible control, BCD address decoding, and operates from +1.8V to +5.5V single supply or ±2.5V dual supplies-critical for portable instrumentation and battery-powered medical equipment.
Technical Context
The MAX4638EGE implements a single-pole, 8-throw (SP8T) analog switch architecture using CMOS transmission gates, with three binary address inputs (A0–A2) and an active-low enable (EN) controlling channel selection. It guarantees break-before-make timing (≥1ns) and supports bidirectional signal flow across all eight NOx inputs and the common COM terminal.
Its rail-to-rail operation enables full-swing analog signals from V− to V+, while internal protection diodes clamp input voltages beyond supply rails. The device delivers 85MHz on-channel bandwidth and maintains ≤0.4Ω RON matching between channels-ensuring consistent gain and minimal crosstalk (-85dB at 1MHz) in precision routing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Single 8:1 analog multiplexer (SP8T) |
| On-resistance (RON) | 3.5Ω at +5V supply - ensures minimal voltage drop and signal attenuation in low-impedance paths |
| Off-isolation | -75dB at 10MHz - suppresses leakage from inactive channels into the output path |
| Crosstalk | -85dB at 1MHz - prevents interference between selected and unselected analog channels |
| Switching time (tON/tOFF) | 18ns / 7ns - enables high-speed signal routing in automated test and real-time acquisition |
| Supply range | +1.8V to +5.5V single supply or ±2.5V dual supply - supports ultra-low-power portable and industrial designs |
| Leakage current | 0.25nA at +25°C - preserves accuracy in high-impedance sensor interfaces and precision measurement front-ends |
Pinout & Package
MAX4638EGE is housed in a 16-pin QFN package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; pins are numbered counterclockwise from top-left corner when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15, 16 | A0, A1, A2 | 3-bit binary address inputs selecting one of eight NOx channels |
| 2 | EN | Active-high enable - disables all switches when low |
| 3 | V− | Negative supply rail (0V for single-supply operation) |
| 4–7 | NO1–NO4 | Bidirectional analog inputs (channels 1–4) |
| 8 | COM | Common bidirectional analog output/input terminal |
| 9–12 | NO8–NO5 | Bidirectional analog inputs (channels 8–5, reverse order per layout) |
| 13 | V+ | Positive supply rail (+1.8V to +5.5V) |
| 14 | GND | Ground reference for logic and analog sections |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports full-swing signals from V− to V+ without clipping - essential for ±2.5V dual-supply and 0–5V single-supply systems |
| Guaranteed RON match | ≤0.4Ω between channels - minimizes gain error in multi-channel calibration and sensor array routing |
| Break-before-make switching | Guaranteed ≥1ns dead time - prevents momentary short-circuits during channel transitions |
| TTL/CMOS-compatible logic inputs | VIH = 2.4V, VIL = 0.8V at +5V supply - simplifies interface with microcontrollers and FPGAs without level-shifting |
| Low charge injection | 13pC - reduces settling error and glitch amplitude in sample-and-hold and ADC front-end circuits |
Applications
| Automatic Test Equipment | Low-Voltage Data-Acquisition Systems |
|---|---|
Use Scenario: Multiplexing multiple DUT sensor outputs to a shared digitizer in production test racks. IC Role / Device Role / Timing Role: Single 8:1 analog switch routing calibrated analog signals under microcontroller control. Use Value: 3.5Ω RON and <0.4Ω channel matching preserve measurement linearity across all 8 channels. | Use Scenario: Selecting among 8 thermocouple or strain-gauge inputs in handheld diagnostic instruments. IC Role / Device Role / Timing Role: Low-leakage (0.25nA), rail-to-rail multiplexer enabling direct connection to high-impedance sensors. Use Value: +1.8V minimum supply allows operation from single Li-ion cell with no boost converter required. |
| Audio Signal Routing | Medical Equipment Signal Path |
Use Scenario: Switching between 8 microphone preamp outputs in portable conferencing hardware. IC Role / Device Role / Timing Role: Bidirectional analog mux with -85dB crosstalk isolating adjacent audio channels. Use Value: 85MHz bandwidth preserves wideband audio fidelity up to 20kHz with negligible phase shift. | Use Scenario: Routing ECG, EEG, or pulse oximetry sensor signals in battery-powered patient monitors. IC Role / Device Role / Timing Role: Precision analog switch with guaranteed break-before-make to prevent electrode shorting. Use Value: -75dB off-isolation blocks noise coupling between biopotential channels during multiplexed acquisition. |
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 with 4.7Ω RON, ±15V max supply, 16-TSSOP only | Higher supply voltage range but higher on-resistance and no 16-QFN option | Prefer MAX4638EGE for low-voltage battery operation and compact QFN footprint |
| TS5A23159DRCR | Dual 4:1 mux, 0.9Ω RON, 10-pin WSON, no A2 pin or 8-channel capability | Lower RON but lacks single 8:1 topology and BCD addressing | Choose MAX4638EGE when 8-input selection with standard address bus is required |
Compared with ADG1408BRUZ and TS5A23159DRCR, the MAX4638EGE uniquely combines 8:1 topology, 16-QFN packaging, sub-4Ω RON, and guaranteed break-before-make in a +1.8V–+5.5V supply range-making it optimal for space-constrained, low-power, multi-channel analog routing where channel count and supply flexibility are critical.
Availability
MAX4638EGE is available at Aetrix Electronics and suitable for automatic test equipment, portable medical diagnostics, and low-voltage data-acquisition systems requiring stable component supply across extended temperature ranges (-40°C to +85°C).
Supply support for MAX4638EGE 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 specifically for low-voltage, high-fidelity analog signal routing in portable and battery-powered instrumentation-emphasizing rail-to-rail operation, low leakage, and guaranteed switching behavior.
FAQ
What is the maximum supply voltage rating for MAX4638EGE?
The MAX4638EGE has an absolute maximum V+ to V− rating of +6V. Its recommended operating range is +1.8V to +5.5V for single-supply use or ±2.5V for dual-supply operation. Exceeding +6V differential or applying voltages beyond -0.3V to (V+ + 0.3V) on analog pins may cause permanent damage, as specified in the Absolute Maximum Ratings table of the MAX4638EGE datasheet.
Does MAX4638EGE support break-before-make switching, and is it guaranteed?
Yes, the MAX4638EGE guarantees break-before-make switching with a minimum tBBM of 1ns over the full temperature range (-40°C to +85°C). This is verified in the Electrical Characteristics tables and confirmed in the Truth Table and Detailed Description sections of the MAX4638EGE datasheet-ensuring no overlap between channel closures during address transitions.
What is the on-resistance flatness specification for MAX4638EGE, and why does it matter?
The MAX4638EGE guarantees ≤1.2Ω on-resistance flatness (RFLAT(ON)) over its full analog signal range. This means RON varies by no more than 1.2Ω as the input voltage sweeps from V− to V+, preserving consistent gain and minimizing harmonic distortion-critical in audio routing and precision measurement where signal-dependent nonlinearity must be minimized.
Can MAX4638EGE operate with a +3.3V supply, and what performance changes occur?
Yes, the MAX4638EGE fully supports +3.3V single-supply operation. At +3.3V, typical RON increases to 6Ω (vs. 3.5Ω at +5V), and leakage remains ≤0.35nA. All timing parameters (tON, tOFF, tBBM) remain within spec, and rail-to-rail operation is preserved-making it ideal for 3.3V microcontroller-based data loggers and IoT edge sensors.
Is the MAX4638EGE pinout compatible with other packages in the MAX4638 family?
No-the MAX4638EGE (16-pin QFN) shares identical pin functions with the MAX4638EUE (16-TSSOP) and MAX4638ESE (16-SO), but differs from the 20-pin QFN variant (MAX4638EGP), which adds two NC pins and relocates A2 and GND. Always verify package-specific pin diagrams before PCB layout, as the MAX4638EGE pin mapping is defined in the "Pin Configurations" section of its datasheet.
MAX4638EGE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SP8T - NO
- 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:
- -65dB @ 10MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (4x4)
MAX4638EGE FAQ
1.How can I place an order for MAX4638EGE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4638EGE 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 MAX4638EGE reliable?
The price and inventory of MAX4638EGE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4638EGE is usually 5 days.
3.What payment methods are accepted for MAX4638EGE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4638EGE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4638EGE?
MAX4638EGE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4638EGE 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 MAX4638EGE?
For technical support, including MAX4638EGE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4638EGE requirements.
6.How does Aetrix verify that MAX4638EGE is sourced from the original manufacturer or authorized distributors?
All MAX4638EGE 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 MAX4638EGE meets industry standards.
7.What is the process for return or replacement of MAX4638EGE?
All MAX4638EGE units undergo pre-shipment inspection (PSI). If there is an issue with MAX4638EGE, 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 MAX4638EGE part is unused and in its original packaging.
Return procedure for MAX4638EGE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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