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Analog Devices Inc./Maxim Integrated MAX337EWI+
- Part No.:
- MAX337EWI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX337EWI+.pdf
- Description:
- IC MUX DUAL 8:1 400OHM 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,721
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Product details
Overview
MAX337EWI+ from Maxim Integrated is a dual 8-channel CMOS analog multiplexer designed to route one of eight differential inputs (A or B side) to its respective common output (COMA or COMB) under 3-bit binary address control. It features ≤400Ω on-resistance, <20pA NO-off leakage at +25°C, 3.5pC typical charge injection, ±4.5V to ±20V dual-supply operation, and bidirectional rail-to-rail signal handling - enabling precision signal routing in automated test equipment and data acquisition systems.
For engineers reviewing the MAX337EWI+ datasheet, MAX337EWI+ pinout, MAX337EWI+ application, or MAX337EWI+ equivalent, key selection considerations include its dual 8-channel differential architecture, guaranteed low charge injection for sampling accuracy, ESD protection >2000V (Method 3015.7), TTL/CMOS-compatible enable and address inputs, and compatibility with industry-standard DG507 replacements in wide SO packaging.
Technical Context
The MAX337EWI+ implements a fully decoded 3-bit address logic (A0–A2) with independent enable (EN) control per 8-channel bank, supporting simultaneous or selective switching of A-side and B-side channels. Its BiCMOS process ensures matched on-resistance (<10Ω channel-to-channel), low dynamic charge injection, and stable leakage performance across –40°C to +85°C.
It operates with true bidirectional signal flow - COMA/COMB and NOxA/NOxB terminals are functionally identical analog ports - and supports unbalanced supplies (e.g., +24V/–5V), provided |V+ – V–| ≤ 44V. All digital inputs tolerate full supply range and maintain TTL thresholds (0.8V/2.4V) across ±4.5V to ±18V dual supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Configuration | Dual 8-channel - two independent banks (A and B), each with 8 inputs and 1 common output |
| On-Resistance (max) | 400Ω - ensures minimal voltage drop and gain error in precision signal paths at ±10V COM |
| NO-Off Leakage (25°C) | <20pA - preserves high-impedance sensor or reference node integrity during channel disable |
| Charge Injection (typ) | 3.5pC - limits voltage glitch on sampled-hold capacitors, critical for 12+ bit ADC front-ends |
| Supply Range | ±4.5V to ±20V dual or +4.5V to +30V single - enables flexible biasing in industrial and test instrumentation |
| Transition Time (max) | 500ns - supports multiplexing rates up to ~1MHz in time-critical scanning applications |
| ESD Protection | >2000V HBM - reduces need for external protection in benchtop and field-deployable equipment |
| Logic Compatibility | TTL/CMOS - interfaces directly with microcontrollers, FPGAs, and logic families without level-shifting |
Pinout & Package
MAX337EWI+ is housed in a 28-pin Wide SO (W28+6) package, RoHS-compliant and lead-free (+ suffix). Pin layout supports dual-bank address decoding and isolated analog routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Bias rail for internal logic and switch driver stages; must be ≥ |V–| + 4.5V for proper operation |
| V– | Negative supply input | Reference for negative analog swing; connect to GND for single-supply use (0V to +V+) |
| GND | Logic ground | Return path for digital control signals only; separate from analog return unless system design mandates common ground |
| EN | Global enable input | Active-high TTL/CMOS signal enabling both A and B banks simultaneously |
| A0–A2 | 3-bit binary address inputs | Selects one of eight channels per bank; no A3 pin - distinguishes MAX337 from 16-channel MAX336 |
| COMA, COMB | Analog common outputs (A/B banks) | Bidirectional ports - may serve as input or output depending on signal flow direction |
| NO1A–NO8A, NO1B–NO8B | Analog channel inputs/outputs | Fully interchangeable with COMA/COMB; support differential routing between two signal domains |
| N.C. | No internal connection | Pins 2, 3, 13 - unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail bidirectional switching | Supports analog signals from V– to V+ on all NOx and COM terminals - eliminates clipping in wide-dynamic-range systems |
| Guaranteed low charge injection | 3.5pC typical ensures ≤0.5 LSB error when driving 12-bit 1000pF sampling capacitors |
| Matched on-resistance | <10Ω max mismatch between channels minimizes gain variation across multiplexed sensor channels |
| DG507 pin-compatible upgrade | Direct replacement for legacy DG507 in wide SO footprint - no PCB redesign required |
| High off-isolation | –82dB at 100kHz prevents crosstalk-induced measurement noise in multi-channel DAQ |
| Low power supply current | <1µA quiescent (VEN = 0V) enables battery-operated portable instrumentation |
Applications
| Automated Test Equipment (ATE) | Precision Data Acquisition Systems |
|---|---|
Use Scenario: Scanning multiple DUT sensor outputs into a shared high-resolution ADC channel. IC Role / Device Role / Timing Role: Dual-bank analog mux routes A-side thermocouple signals and B-side strain gauge outputs independently to separate ADC inputs. Use Value: Matched on-resistance and sub-20pA leakage preserve absolute accuracy across 16+ channel scans without calibration drift. | Use Scenario: Multiplexing low-level biopotential signals (ECG, EEG) in medical monitoring hardware. IC Role / Device Role / Timing Role: Low-charge-injection MAX337EWI+ switches bio-signal sources to instrumentation amplifier inputs with minimal transient disturbance. Use Value: 3.5pC charge injection prevents baseline shift and false triggering in sub-mV signal conditioning paths. |
| Industrial Process Control | Calibration & Metrology Instruments |
Use Scenario: Routing calibrated reference voltages and sensor feedback signals to a delta-sigma ADC in PLC I/O modules. IC Role / Device Role / Timing Role: Enables periodic self-calibration by switching known references into signal chain while maintaining isolation from active channels. Use Value: –82dB off-isolation and <500ns transition time allow fast, noise-immune reference injection without disturbing ongoing measurements. | Use Scenario: Building NIST-traceable multichannel calibrators that switch precision voltage standards to DUT inputs. IC Role / Device Role / Timing Role: Dual-bank architecture allows simultaneous routing of primary standard (A bank) and guard/compensation signal (B bank). Use Value: Bidirectional rail-to-rail operation supports ±10V reference ranges; ESD >2000V protects against handling-induced failures during lab maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX337CWI+ | Same pinout and functionality, but rated for 0°C to +70°C commercial temperature range | Suitable for non-industrial environments where extended temperature stability is not required | Select MAX337CWI+ for cost-sensitive, ambient-temperature bench instruments |
| ADG507AKRZ | Pin-compatible 8-channel dual mux; higher on-resistance (450Ω max), lower ESD rating (1500V HBM) | Acceptable where leakage & charge injection specs are relaxed, but requires verification of signal integrity at full scale | Choose ADG507AKRZ only if existing layout uses ADI footprint and thermal margin permits higher RON |
Compared with MAX337CWI+, the MAX337EWI+ provides extended temperature operation (–40°C to +85°C) essential for industrial deployment; versus ADG507AKRZ, it delivers superior leakage control and ESD robustness - critical for metrology-grade reliability without compromising pin compatibility.
Availability
MAX337EWI+ is available at Aetrix Electronics and suitable for precision data acquisition, automated test equipment, industrial process control, and calibration instrument designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX337EWI+ 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 high-performance analog, mixed-signal, and RF ICs for industrial, automotive, communications, and computing applications.
The MAX336/MAX337 family was engineered specifically for low-leakage, low-charge-injection analog multiplexing in precision measurement systems - emphasizing rail-to-rail operation, TTL compatibility, and robustness in noisy or thermally demanding environments.
FAQ
What is the operating temperature range for MAX337EWI+?
The MAX337EWI+ is specified for operation from –40°C to +85°C. This extended industrial temperature range ensures reliable performance in harsh environments such as factory-floor test systems, outdoor instrumentation, and motor control feedback circuits. The device's leakage currents and on-resistance remain within datasheet limits across this full range, validated per the E-grade qualification standard.
Can MAX337EWI+ operate from a single supply?
Yes, MAX337EWI+ supports single-supply operation from +4.5V to +30V. In this configuration, connect V– to GND and ensure all analog signals remain within 0V to V+. The device maintains bidirectional rail-to-rail switching, TTL-compatible logic thresholds, and specified leakage/on-resistance performance - making it suitable for portable and battery-powered data loggers where dual supplies are impractical.
Is MAX337EWI+ pin-compatible with DG507?
Yes, MAX337EWI+ is a direct pin-compatible upgrade for the industry-standard DG507 in the 28-pin wide SO package. All signal, supply, and control pins align identically - including COMA, COMB, NO1A–NO8A, NO1B–NO8B, EN, A0–A2, V+, V–, and GND. No PCB changes are required; users gain improved leakage, lower charge injection, and enhanced ESD protection without layout modification.
What is the maximum analog signal voltage range supported by MAX337EWI+?
When operated on dual supplies (e.g., ±15V), MAX337EWI+ supports analog signals from V– to V+, i.e., ±15V - a full 30V span. Under single-supply conditions (+12V, V– = GND), the range is 0V to +12V. Absolute maximum ratings limit V+ to 44V above V–, and signal voltages must stay within (V– – 0.3V) to (V+ + 0.3V) to avoid diode conduction and potential damage.
Does MAX337EWI+ support differential signal routing?
Yes, MAX337EWI+ inherently supports differential routing via its dual-bank architecture: the A bank (COMA + NO1A–NO8A) and B bank (COMB + NO1B–NO8B) can handle complementary signal pairs. Each bank operates independently, allowing simultaneous switching of positive and negative legs of a differential sensor or DAC output - preserving common-mode rejection and minimizing skew when used with matched external components.
MAX337EWI+ 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:
- 2
- On-State Resistance (Max):
- 400Ohm
- Channel-to-Channel Matching (ΔRon):
- 5Ohm
- Voltage - Supply, Single (V+):
- 4.5V ~ 20V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 500ns, 500ns
- -3db Bandwidth:
- -
- Charge Injection:
- 3.5pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 20pA
- Crosstalk:
- -86dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
MAX337EWI+ FAQ
1.How can I place an order for MAX337EWI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX337EWI+ 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 MAX337EWI+ reliable?
The price and inventory of MAX337EWI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX337EWI+ is usually 5 days.
3.What payment methods are accepted for MAX337EWI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX337EWI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX337EWI+?
MAX337EWI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX337EWI+ 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 MAX337EWI+?
For technical support, including MAX337EWI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX337EWI+ requirements.
6.How does Aetrix verify that MAX337EWI+ is sourced from the original manufacturer or authorized distributors?
All MAX337EWI+ 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 MAX337EWI+ meets industry standards.
7.What is the process for return or replacement of MAX337EWI+?
All MAX337EWI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX337EWI+, 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 MAX337EWI+ part is unused and in its original packaging.
Return procedure for MAX337EWI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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