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Analog Devices Inc./Maxim Integrated MAX5434MEZT+T
- Part No.:
- MAX5434MEZT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Potentiometers
- Package:
- -
- Datasheet:
-
MAX5434MEZT+T.pdf
- Description:
- IC DGTL POT 50KOHM 32TAP SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,690
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Product details
Overview
MAX5434MEZT+T from Maxim Integrated is a 32-tap, nonvolatile, I²C-compatible digital potentiometer in a 6-pin thin SOT23 package, providing 50kΩ end-to-end resistance, ±0.15 LSB typical INL/DNL, and 35ppm/°C end-to-end temperature coefficient. It functions as a digitally controlled variable resistor with H internally connected to W, suited for LCD contrast adjustment and programmable gain amplifier biasing.
For engineers reviewing the MAX5434MEZT+T datasheet, MAX5434MEZT+T pinout, MAX5434MEZT+T application, or MAX5434MEZT+T equivalent, key selection considerations include its 50kΩ resistance value, 6-pin SOT23 footprint, nonvolatile wiper recall at power-up, 400kbps I²C interface, and operation over –40°C to +85°C.
Technical Context
The MAX5434MEZT+T implements a 31-element resistor ladder with 32 discrete tap positions, configured exclusively as a 2-terminal variable resistor (H internally tied to W). Its internal EEPROM stores wiper position across power cycles, with guaranteed 200,000 write cycles and 50-year data retention at +85°C.
It uses a standard I²C slave interface (7-bit address 0x54 or 0x56 per ordering code AABY) with SDA/SCL pins, supports 2.7V–5.25V single-supply operation, and features 500nA typical standby current. The device lacks A0 pin - unlike TDFN variants - simplifying address configuration in multi-device systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resistance Value | 50kΩ end-to-end - sets full-scale analog range for gain/bias control circuits |
| Tap Resolution | 32 taps (5-bit control) - enables ~3.125% incremental resistance steps |
| Tempco (End-to-End) | 35ppm/°C - ensures stable resistance over industrial temperature range (–40°C to +85°C) |
| I²C Speed | 400kbps fast-mode - reduces serial transaction time and system latency |
| Wiper Nonvolatility | EEPROM store time ≤12ms - requires minimum idle period before next command |
| Supply Current | 500nA typical standby - enables always-on bias networks without significant quiescent load |
| INL / DNL | ±0.15 LSB typical - guarantees monotonicity and precision in closed-loop gain calibration |
Pinout & Package
Package: 6-pin thin SOT23 (Z6-1), 2.9mm × 1.6mm × 0.95mm body, lead-free, tape-and-reel (T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - H | High terminal | Internally connected to W; forms one end of variable resistor path |
| 2 - SDA | I²C data line | Open-drain bidirectional interface; requires external 4.7kΩ pullup |
| 3 - GND | Ground reference | Return path for supply and signal; exposed pad (EP) internally tied to GND |
| 4 - SCL | I²C clock input | Input-only synchronous timing source; requires pullup if shared bus |
| 5 - VDD | Power supply | 2.7V–5.25V single rail; bypass with 0.1µF ceramic capacitor to GND |
| 6 - L | Low terminal | Second end of variable resistor; voltage must remain between GND and VDD |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile wiper recall | Automatically restores last-set resistance at power-up without host intervention |
| Low ratiometric tempco | 5ppm/°C - preserves voltage-divider ratio stability in precision bias applications |
| Minimal board space | 6-pin thin SOT23 footprint (2.9mm × 1.6mm) - saves >40% area vs. 8-pin TDFN |
| I²C address options | Factory-programmed 7-bit addresses (e.g., 0x54 for AABY marking) - enables up to 3 devices on same bus |
| Industrial temperature range | Specified from –40°C to +85°C - suitable for embedded control and instrumentation |
Applications
| LCD Contrast Control | Programmable Gain Amplifier Bias |
|---|---|
|
Use Scenario: Adjusting contrast voltage for monochrome STN or segment LCD displays using a microcontroller-driven bias network. IC Role / Device Role / Timing Role: Acts as digitally tunable series resistor in positive-bias voltage divider, replacing mechanical trimmer. Use Value: Enables factory calibration and field-adjustable contrast without hardware modification or potentiometer wear-out. |
Use Scenario: Setting feedback resistance in op-amp-based programmable-gain stages for sensor signal conditioning. IC Role / Device Role / Timing Role: Provides stable, low-drift resistance element in gain-setting network (e.g., Rf in inverting amplifier). Use Value: Achieves <±0.15 LSB linearity and 35ppm/°C tempco - critical for maintaining gain accuracy across temperature. |
| Adjustable Voltage Reference | Programmable Filter Cutoff |
|
Use Scenario: Tuning output voltage of precision shunt references (e.g., MAX6160) via digital feedback resistor network. IC Role / Device Role / Timing Role: Functions as R2 in adjustable reference divider, directly setting VOUT = 1.23V × (1 + R2/R1). Use Value: Delivers 50kΩ nominal value with 5ppm/°C ratiometric tempco - ensures reference stability independent of supply drift. |
Use Scenario: Dynamically adjusting cutoff frequency and gain of first-order active RC filters in audio or sensor front-ends. IC Role / Device Role / Timing Role: Replaces fixed R3 in filter transfer function fC = 1/(2π·R3·C), enabling software-defined bandwidth. Use Value: Supports 50kΩ resistance with 500kHz –3dB bandwidth (CL = 10pF) - sufficient for DC–audio-band tuning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5434LEZT+T | Same 50kΩ resistance and SOT23-6 package, but factory-programmed I²C address 0x54 (vs. 0x56 for MAX5434MEZT+T) | Identical functional behavior; differs only in bus address - required when multiple MAX5434 devices share I²C bus | Select MAX5434LEZT+T if 0x54 address is needed; otherwise MAX5434MEZT+T provides identical performance with alternate addressing |
| AD5170BRJZ-50-R7 | 32-tap, 50kΩ, SOT23-6, I²C interface, but uses SPI-compatible protocol with different command structure and no internal H–W short | Requires modified firmware for register writes; lacks integrated H–W connection - needs external wiring for variable-resistor mode | Choose AD5170BRJZ-50-R7 only if existing design uses Analog Devices' register map or requires separate H/W control |
Compared with MAX5434LEZT+T, MAX5434MEZT+T offers identical electrical specs but distinct I²C address (0x56), enabling concurrent use on same bus; versus AD5170BRJZ-50-R7, it delivers simpler variable-resistor integration via internal H–W tie and Maxim-optimized command set.
Availability
MAX5434MEZT+T is available at Aetrix Electronics and suitable for LCD bias control, programmable gain amplifiers, adjustable voltage references, and programmable filter designs requiring stable component supply and guaranteed long-term availability.
Supply support for MAX5434MEZT+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) designs high-performance analog and mixed-signal ICs for precision, power, and interface applications.
The MAX5432–MAX5435 family was engineered specifically for replacing mechanical potentiometers in space-constrained, temperature-stable, digitally reconfigurable analog circuits - emphasizing nonvolatility, low tempco, and minimal footprint.
FAQ
What is the I²C address of MAX5434MEZT+T?
The MAX5434MEZT+T has a factory-programmed 7-bit I²C slave address of 0x56 (binary 0101100), corresponding to top-marking "AABY" per the Ordering Information table. This address is fixed and cannot be altered externally, as the device lacks an A0 pin for address selection.
Does MAX5434MEZT+T support voltage-divider configuration?
No - MAX5434MEZT+T is configured exclusively as a 2-terminal variable resistor, with the H terminal internally connected to the W (wiper) terminal. For true 3-terminal voltage-divider operation (H, L, W accessible), select MAX5432 or MAX5433 in TDFN-8 packages instead.
What is the maximum capacitive load the wiper can drive in MAX5434MEZT+T?
The MAX5434MEZT+T wiper output is specified for ≤10pF capacitive load in transient response testing (e.g., toc06/toc07). Driving larger loads may degrade settling time and introduce ringing; for >10pF, buffer with an op-amp or add series resistance to isolate capacitance.
How long does nonvolatile store take in MAX5434MEZT+T?
A nonvolatile memory write in MAX5434MEZT+T requires a minimum idle time of 12ms after the STOP condition, during which the device performs internal EEPROM programming. Host firmware must enforce this delay before issuing subsequent I²C commands to avoid data corruption.
Is MAX5434MEZT+T RoHS-compliant and lead-free?
Yes - the "+T" suffix in MAX5434MEZT+T denotes a lead-free, RoHS-compliant package. It uses matte tin finish on terminals and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH.
MAX5434MEZT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- -
- Configuration:
- -
- Number of Circuits:
- -
- Number of Taps:
- -
- Resistance (Ohms):
- -
- Interface:
- -
- Memory Type:
- -
- Voltage - Supply:
- -
- Features:
- -
- Tolerance:
- -
- Temperature Coefficient (Typ):
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
- Operating Temperature:
- -
- Resistance - Wiper (Ohms) (Typ):
- -
MAX5434MEZT+T FAQ
1.How can I place an order for MAX5434MEZT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5434MEZT+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 MAX5434MEZT+T reliable?
The price and inventory of MAX5434MEZT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5434MEZT+T is usually 5 days.
3.What payment methods are accepted for MAX5434MEZT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5434MEZT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5434MEZT+T?
MAX5434MEZT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5434MEZT+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 MAX5434MEZT+T?
For technical support, including MAX5434MEZT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5434MEZT+T requirements.
6.How does Aetrix verify that MAX5434MEZT+T is sourced from the original manufacturer or authorized distributors?
All MAX5434MEZT+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 MAX5434MEZT+T meets industry standards.
7.What is the process for return or replacement of MAX5434MEZT+T?
All MAX5434MEZT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5434MEZT+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 MAX5434MEZT+T part is unused and in its original packaging.
Return procedure for MAX5434MEZT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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