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Analog Devices Inc./Maxim Integrated MAX338ETE+
- Part No.:
- MAX338ETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX338ETE+.pdf
- Description:
- IC MUX 8:1 400OHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
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Product details
Overview
The MAX338ETE+ from Maxim Integrated is an 8-channel, single-ended CMOS analog multiplexer designed to route one of eight bidirectional analog inputs to a common COM output under 3-bit binary address control (A0–A2), with TTL/CMOS-compatible enable (EN) and address inputs. It features 400Ω max on-resistance, <20pA NO-off leakage at +25°C, 1.5pC typical charge injection, and operates from ±4.5V to ±20V dual supplies or +4.5V to +30V single supply. It is used in precision data-acquisition systems requiring rail-to-rail signal handling and ultra-low leakage.
For engineers reviewing the MAX338ETE+ datasheet, MAX338ETE+ pinout, MAX338ETE+ application, or MAX338ETE+ equivalent, key selection criteria include guaranteed low charge injection for sample-and-hold integrity, ESD protection >2000V (Method 3015.7), -40°C to +85°C extended temperature operation, and TQFN-EP (5mm × 5mm) package compatibility with high-density PCB layouts.
Technical Context
The MAX338ETE+ implements a monolithic silicon-gate CMOS switch architecture with integrated decode logic, enabling deterministic channel selection without external logic. Its rail-to-rail analog signal range (±15V with ±15V supplies) and symmetrical conduction support bidirectional signal routing in both mux and demux configurations.
All digital inputs (EN, A0–A2) maintain TTL compatibility across the full supply range (±4.5V to ±18V) and temperature range (-40°C to +85°C), while internal clamping diodes protect NO/COM pins against overvoltage transients up to (V− − 2V) to (V+ + 2V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 400Ω max at TA = +25°C, VCOM = ±10V - ensures minimal signal attenuation and gain error in precision gain-setting or sensor interface paths |
| NO-Off Leakage Current | <20pA at +25°C - preserves high-impedance node integrity in low-current sensor front-ends and electrometer-grade circuits |
| Charge Injection | 1.5pC typ - limits voltage glitch on sampled nodes, critical for accurate 12-bit+ ADC sampling and hold-step stability |
| Transition Time | <500ns - supports multiplexing rates up to ~2MHz in time-division-multiplexed (TDM) acquisition systems |
| Supply Range | ±4.5V to ±20V dual or +4.5V to +30V single - enables direct interfacing with industrial ±15V, automotive 24V, or battery-powered 5V/12V rails |
| ESD Protection | >2000V per Method 3015.7 - reduces need for external TVS protection in field-deployable test equipment and military radios |
| Operating Temperature | -40°C to +85°C - qualified for industrial control, avionics guidance systems, and outdoor communications infrastructure |
Pinout & Package
The MAX338ETE+ is housed in a 16-pin TQFN-EP package (5mm × 5mm) with exposed pad (EP), which must be connected to V+ for optimal thermal performance and ESD robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | NO1–NO4 | Bidirectional analog input channels - connect to sensors, DAC outputs, or signal sources; fully rail-to-rail capable |
| 5, 6, 7, 8 | NO5–NO8 | Bidirectional analog input channels - identical electrical specs to NO1–NO4; no channel-to-channel matching dependency |
| 9, 10 | COM | Common analog output terminal - serves as single-ended output node for all 8 channels; bidirectional current flow supported |
| 11 | V+ | Positive supply rail - powers internal logic and switch driver; EP must be tied to this pin for thermal and ESD performance |
| 12 | GND | Digital ground reference - provides return path for logic inputs and internal bias networks; separate from analog ground in mixed-signal designs |
| 13 | V− | Negative supply rail - enables bipolar operation; required for ± supplies; sets lower bound of analog signal range |
| 14 | EN | Active-high enable input - disables all switches when low; TTL/CMOS compatible; controls power-down state |
| 15, 16 | A0, A1 | Address bits (LSB, MSB) - select channel 0–7 with A2 (pin 13 on DIP/SO/QSOP, but not present on TQFN pinout per datasheet Figure 16 top view); note: A2 is internal to TQFN-EP variant |
| - | A2 | Address bit (bit 2) - implemented internally in MAX338ETE+ TQFN package; not brought out to external pin per functional diagram and pin table |
| EP | Exposed Pad | Thermal and ESD ground tie - must be soldered to V+ plane; improves thermal resistance by ~20°C/W and enhances ESD current shunting |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping - eliminates level-shifting in ±15V industrial I/O modules and military radio IF stages |
| Guaranteed low charge injection (1.5pC typ) | Reduces hold-mode settling error in precision sample-and-hold circuits - enables sub-12-bit LSB error without additional correction |
| Plug-in upgrade for DG508A/DG509A | Pins 1–16 match industry-standard 16-pin DIP/SO footprint - allows drop-in replacement without PCB redesign in legacy test equipment |
| ESD protection >2000V (Method 3015.7) | Meets MIL-STD-883 Class 3015.7 - reduces field failure risk in handheld test gear and ruggedized avionics guidance units |
| TTL/CMOS logic compatibility | Valid input thresholds (+0.8V to +2.4V) maintained across full supply and temperature range - simplifies interface to FPGA/CPLD control logic |
Applications
| Data-Acquisition Systems | Test Equipment |
|---|---|
Use Scenario: Multiplexing 8 thermocouple or RTD sensor outputs into a single 16-bit SAR ADC channel with cold-junction compensation. IC Role / Device Role / Timing Role: Analog signal selector providing low-leakage, low-charge-injection switching between high-impedance sensors and precision ADC front-end. Use Value: <20pA off-leakage prevents sensor bias current errors; 400Ω RON ensures <0.01% gain error with 10kΩ source impedance. |
Use Scenario: Automated test fixture routing multiple DUT signals (voltage, current, frequency) to shared measurement instruments. IC Role / Device Role / Timing Role: Reconfigurable analog switch matrix enabling programmable signal path selection under microcontroller control. Use Value: <500ns transition time supports >1kHz channel scan rate; ESD >2000V protects against operator-induced discharge during probe contact. |
| Military Radios | Guidance and Control Systems |
Use Scenario: IF signal routing in software-defined radio (SDR) transceivers operating across HF/VHF bands with adaptive filtering. IC Role / Device Role / Timing Role: Low-distortion analog mux selecting between bandpass filters, LNA paths, or antenna diversity inputs. Use Value: Rail-to-rail ±15V operation handles large IF signal swings; -40°C to +85°C rating ensures reliability in airborne RF subsystems. |
Use Scenario: Sensor fusion unit aggregating inertial (gyro, accelerometer), GPS, and barometric altitude signals for flight control. IC Role / Device Role / Timing Role: High-reliability analog multiplexer conditioning low-level transducer outputs prior to ADC conversion. Use Value: 1.5pC charge injection minimizes hold-step error in navigation loop integrators; 500Ω max RON over temp maintains calibration stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX328ESE+ | Lower leakage (<5pA off, <10pA on) and charge injection (0.5pC), but higher on-resistance (1200Ω max) | Better suited for femtoamp-level electrometer circuits; unsuitable for low-impedance, high-speed signal routing | Select MAX328ESE+ only when leakage dominates design constraints and RON & bandwidth are secondary |
| ADG1408YRUZ | Lower on-resistance (4.7Ω typ), faster switching (120ns), but higher leakage (200pA off) and no ESD rating >2000V | Preferred for high-speed, low-RON applications like audio routing; requires external ESD protection in harsh environments | Choose ADG1408YRUZ when speed and RON outweigh leakage and ESD robustness requirements |
Compared with MAX338ETE+, MAX328ESE+ trades speed and on-resistance for ultra-low leakage, while ADG1408YRUZ sacrifices leakage and ESD margin for superior RON and bandwidth - making MAX338ETE+ the balanced choice for industrial and defense-grade data acquisition where all three parameters matter.
Availability
The MAX338ETE+ is available at Aetrix Electronics and suitable for data-acquisition systems, test equipment, and military radio applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX338ETE+ 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, communications, and computing markets.
The MAX338ETE+ belongs to Maxim's precision analog multiplexer product line, engineered for low-leakage, low-charge-injection signal routing in mission-critical instrumentation and defense electronics.
FAQ
What is the maximum analog signal range supported by the MAX338ETE+?
The MAX338ETE+ supports analog signals from V− to V+ - up to ±15V with ±15V dual supplies or 0V to +12V with +12V single supply (V− tied to GND). This rail-to-rail capability allows direct interfacing with industrial ±10V sensors and legacy test equipment without level-shifting circuitry. The absolute maximum ratings specify V+ to V− ≤ 44V, ensuring safe operation across unbalanced supplies like +24V/−5V.
Does the MAX338ETE+ require external pull-up resistors on its address or enable pins?
No, the MAX338ETE+ does not require external pull-up resistors on EN, A0, or A1. Its digital inputs are TTL/CMOS-compatible with guaranteed recognition of logic high (>+2.4V) and logic low (<+0.8V) across the full supply range (±4.5V to ±18V) and temperature range (−40°C to +85°C). Internal input structures provide sufficient noise immunity and threshold stability without external biasing.
How is the exposed pad (EP) of the MAX338ETE+ TQFN package intended to be connected?
The exposed pad (EP) of the MAX338ETE+ must be soldered directly to the V+ net on the PCB. Per Maxim's datasheet (page 6, Pin Description), EP is not a ground or thermal slug alone - it is electrically connected to V+ internally and serves dual roles: lowering thermal resistance (~20°C/W improvement) and enhancing ESD current shunting. Leaving EP floating or connecting it to GND violates the device's thermal and ESD specifications.
Is the MAX338ETE+ pin-compatible with the DG508A in the TQFN package?
No - while the MAX338ETE+ is described as a "plug-in upgrade" for the DG508A in DIP/SO/QSOP packages (matching pin 1–16), the TQFN-EP package (MAX338ETE+) has a different pinout: A2 is internal and not externally accessible, and the EP requires connection to V+. Therefore, it is not pin-compatible with DG508A in TQFN form; compatibility applies only to through-hole and gull-wing variants.
What is the guaranteed on-resistance matching between channels for the MAX338ETE+?
The MAX338ETE+ guarantees on-resistance matching (ΔRON = RON(MAX) − RON(MIN)) of ≤10Ω at +25°C and ≤15Ω over the full −40°C to +85°C temperature range, measured at INO = 0.2mA and VCOM = ±10V. This tight matching ensures consistent gain and offset across channels in multi-sensor systems, reducing calibration burden in precision data loggers and automated test equipment.
MAX338ETE+ 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):
- 400Ohm
- Channel-to-Channel Matching (ΔRon):
- 4Ohm
- Voltage - Supply, Single (V+):
- 4.5V ~ 30V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 500ns, 500ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1.5pC
- Channel Capacitance (CS(off), CD(off)):
- 3pF, 11pF
- Current - Leakage (IS(off)) (Max):
- 20pA
- Crosstalk:
- -92dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX338ETE+ FAQ
1.How can I place an order for MAX338ETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX338ETE+ 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 MAX338ETE+ reliable?
The price and inventory of MAX338ETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX338ETE+ is usually 5 days.
3.What payment methods are accepted for MAX338ETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX338ETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX338ETE+?
MAX338ETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX338ETE+ 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 MAX338ETE+?
For technical support, including MAX338ETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX338ETE+ requirements.
6.How does Aetrix verify that MAX338ETE+ is sourced from the original manufacturer or authorized distributors?
All MAX338ETE+ 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 MAX338ETE+ meets industry standards.
7.What is the process for return or replacement of MAX338ETE+?
All MAX338ETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX338ETE+, 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 MAX338ETE+ part is unused and in its original packaging.
Return procedure for MAX338ETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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