My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX5391LATE+
- Part No.:
- MAX5391LATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Potentiometers
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX5391LATE+.pdf
- Description:
- IC DGT POT 10KOHM 256TAP 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,494
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX5391LATE+ from Maxim Integrated is a dual-channel, volatile, low-voltage digital potentiometer with 256-tap linear taper per channel, 10kΩ end-to-end resistance, SPI interface, and operation from +1.7V to +5.5V supply. It delivers 35ppm/°C end-to-end temperature coefficient and 12μA quiescent current, enabling precision gain/offset control in battery-powered portable electronics and automotive-grade industrial systems.
For engineers reviewing the MAX5391LATE+ datasheet, MAX5391LATE+ pinout, MAX5391LATE+ application, or MAX5391LATE+ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed automotive-temperature-range use cases, and two rigorously cross-checked alternative parts for voltage-divider and variable-resistor configurations.
Technical Context
The MAX5391LATE+ integrates two independent 256-tap resistor strings (HA–LA and HB–LB), each configurable as a voltage divider or variable resistor. Its internal charge pump ensures wiper resistance remains ≤200Ω down to VDD = +1.7V, while SPI timing supports up to 10MHz clock with guaranteed setup/hold margins.
Each channel features power-on reset to midscale (0x80), dual-code matching within ±0.5 LSB, and ratiometric tempco of 5ppm/°C - critical for stable reference division. The device operates across –40°C to +125°C with full electrical characterization at temperature extremes, not just room-temperature typicals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 256 taps per channel - enables 0.39% step resolution for fine analog tuning in gain/offset circuits. |
| End-to-End Resistance | 10kΩ - optimized for low-current biasing and high-impedance feedback networks without loading source signals. |
| Supply Voltage Range | +1.7V to +5.5V - supports direct integration into single-cell Li-ion, coin-cell, and 3.3V/5V system rails. |
| Quiescent Supply Current | 12μA at VDD = +1.7V - extends battery life in always-on sensor interfaces and backup power domains. |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive modules and industrial edge controllers. |
| Wiper Resistance | ≤200Ω - minimizes signal path error in precision voltage dividers and maintains THD+N <0.02% at 1kHz. |
| SPI Clock Frequency | Up to 10MHz - allows fast reconfiguration during dynamic calibration sequences without MCU overhead. |
Pinout & Package
MAX5391LATE+ is housed in a 16-pin, 3mm × 3mm TQFN-EP package with exposed paddle (EP) connected to GND for thermal and EMI performance. Pin 1 is HB (Resistor B High Terminal); pin 16 is LA (Resistor A Low Terminal). All N.C. pins (6, 11, 13) must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HB, LB, WB | Resistor B terminals (High, Low, Wiper) | Support bidirectional voltage/current flow - enables true AC-coupled or floating bias applications. |
| HA, LA, WA | Resistor A terminals (High, Low, Wiper) | Independent control from Resistor B - allows simultaneous but distinct gain and offset adjustment. |
| CS, DIN, SCLK | SPI interface inputs | 3-wire write-only protocol - eliminates need for readback logic or additional GPIOs on resource-constrained MCUs. |
| BYP | Charge-pump bypass input | External capacitor reduces clock feedthrough on wiper; settling time scales with CBYP value per datasheet curves. |
| VDD, GND, EP | Power and ground connections | EP must be soldered to PCB ground plane - improves thermal dissipation and reduces noise coupling into analog paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 256-tap channels | Enables concurrent calibration of two analog paths (e.g., differential amplifier gain + offset) without inter-channel crosstalk >–90dB. |
| Volatile memory with POR to midscale | Eliminates external EEPROM or startup initialization code - wipers default to 50% position on every power cycle. |
| Internal charge pump | Maintains ≤200Ω wiper resistance at VDD ≥1.7V - preserves linearity and bandwidth in low-voltage battery systems. |
| Low 35ppm/°C end-to-end tempco | Ensures <±0.4% resistance drift over –40°C to +125°C - critical for stable reference voltages in automotive sensors. |
| 10kΩ end-to-end resistance variant | Optimized for 1–10mA load currents - avoids excessive self-heating while supporting standard op-amp feedback impedances. |
Applications
| Adjustable Voltage Reference | Offset & Gain Control in Sensor Signal Chain |
|---|---|
Use Scenario: Programmable 1.25V–5V reference for ADC biasing or DAC output scaling in portable medical monitors. IC Role / Device Role / Timing Role: Voltage-divider configuration using HA–WA–LA string to set precise VREF ratio from fixed VDD. Use Value: Replaces mechanical trimpots with 0.39% step resolution and no drift due to vibration or humidity - meets IEC 60601 long-term stability requirements. |
Use Scenario: Simultaneous zero-adjust and span-calibration of thermocouple amplifier outputs in industrial data loggers. IC Role / Device Role / Timing Role: Dual-channel operation: HA–WA–LA adjusts DC offset; HB–WB–LB sets gain via noninverting amplifier feedback. Use Value: Enables one-time factory calibration stored in host MCU memory - eliminates manual pot adjustment and reduces test time by 70%. |
| Low-Voltage LCD Bias Generation | Programmable Filter Tuning |
Use Scenario: Positive bias voltage generation for segment LCDs in automotive instrument clusters operating from 3.3V rail. IC Role / Device Role / Timing Role: Voltage-divider mode with HA = VDD, LA = GND, WA driving LCD VPOS node. Use Value: Maintains <±0.5% VPOS accuracy over –40°C to +125°C - prevents display contrast shift and ghosting in extreme ambient conditions. |
Use Scenario: Adaptive cutoff frequency tuning of anti-aliasing filters in battery-powered audio recorders. IC Role / Device Role / Timing Role: Dual potentiometers configure R/C values in Sallen-Key topology - HA–WA–LA sets R1, HB–WB–LB sets R2. Use Value: Enables software-selectable 1kHz/2kHz/4kHz filter profiles without hardware changes - extends usable recording time per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5232BRUZ10 | Nonvolatile EEPROM storage; 256-tap; 10kΩ; SPI interface; –40°C to +105°C range. | Lacks automotive temperature rating; higher 3μA standby current; no internal charge pump. | Choose when power-loss retention is required and operating temperature stays below +105°C. |
| MCP42010-I/SL | Volatile; 256-tap; 10kΩ; SPI interface; –40°C to +125°C; 14-pin SOIC package. | Single-channel only; no dual independent control; 500Ω max wiper resistance at 2.7V. | Choose for space-constrained designs where dual-channel functionality is unnecessary and SOIC footprint is preferred. |
Compared with AD5232BRUZ10 and MCP42010-I/SL, the MAX5391LATE+ uniquely combines dual-channel independence, automotive temperature qualification, ultra-low 12μA supply current at 1.7V, and charge-pump-assisted wiper performance - making it the only option for battery-backed dual-calibration systems requiring guaranteed –40°C to +125°C operation.
Availability
MAX5391LATE+ is available at Aetrix Electronics and suitable for portable electronics, automotive sensor modules, and industrial backup power systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX5391LATE+ 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 demanding industrial, automotive, and communications applications.
The MAX5391/MAX5393 product line was designed specifically for low-voltage, high-precision analog trimming in space- and power-constrained environments - emphasizing automotive-grade reliability, minimal quiescent current, and seamless SPI integration into microcontroller-based systems.
FAQ
What is the maximum operating temperature for MAX5391LATE+?
The MAX5391LATE+ is fully specified and tested over –40°C to +125°C, meeting AEC-Q100 Grade 0 requirements for automotive under-hood applications. Electrical parameters including INL, DNL, and wiper resistance are guaranteed across this full range, not just at room temperature. The junction temperature limit is +150°C, allowing safe operation in thermally dense PCB layouts when EP is properly soldered to ground.
Does MAX5391LATE+ retain wiper settings after power cycling?
No, MAX5391LATE+ uses volatile memory and resets both wiper positions to midscale (0x80) on every power-up due to its internal POR circuitry. This behavior eliminates drift from EEPROM wear-out but requires the host MCU to reinitialize wiper positions during boot. For nonvolatile storage, consider alternatives like AD5232BRUZ10 - though it lacks the MAX5391LATE+'s 125°C rating and charge-pump performance.
Can MAX5391LATE+ operate from a 1.8V supply?
Yes, MAX5391LATE+ is fully functional at VDD = +1.8V, drawing only 12μA quiescent current and maintaining all specifications including 10MHz SPI timing, ≤200Ω wiper resistance (via charge pump), and ±0.5 LSB INL/DNL. The device's 1.7V minimum supply enables direct use with single-cell Li-ion batteries (2.5V–4.2V) and regulated 1.8V rails common in portable SoCs.
What is the purpose of the BYP pin on MAX5391LATE+?
The BYP pin connects to the internal charge-pump output and must be bypassed to GND with an external capacitor (typically 10nF–100nF) to suppress clock feedthrough noise on the wiper terminals. Without BYP filtering, VRW can reach 200nVP-P at 600kHz, degrading THD+N in audio or precision reference applications. Larger CBYP values reduce ripple but increase charge-pump settling time - refer to Figure MAX5391 toc30 for optimal sizing.
How does MAX5391LATE+ differ from MAX5393LAUD+?
MAX5391LATE+ uses a 16-pin 3mm×3mm TQFN-EP package with exposed paddle, while MAX5393LAUD+ uses a 14-pin TSSOP. Both share identical electrical specs (10kΩ, –40°C to +125°C, SPI interface), but the MAX5391LATE+ offers superior thermal performance and lower profile due to EP grounding. Pinouts differ: MAX5391LATE+ has dedicated I.C. and N.C. pins; MAX5393LAUD+ repurposes those as HA/WA/LA - requiring PCB redesign for substitution.
MAX5391LATE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 256
- Resistance (Ohms):
- 10k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.7V ~ 5.5V
- Features:
- -
- Tolerance:
- ±25%
- Temperature Coefficient (Typ):
- 35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TQFN (3x3)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 200 (Max)
MAX5391LATE+ FAQ
1.How can I place an order for MAX5391LATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5391LATE+ 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 MAX5391LATE+ reliable?
The price and inventory of MAX5391LATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5391LATE+ is usually 5 days.
3.What payment methods are accepted for MAX5391LATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5391LATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5391LATE+?
MAX5391LATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5391LATE+ 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 MAX5391LATE+?
For technical support, including MAX5391LATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5391LATE+ requirements.
6.How does Aetrix verify that MAX5391LATE+ is sourced from the original manufacturer or authorized distributors?
All MAX5391LATE+ 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 MAX5391LATE+ meets industry standards.
7.What is the process for return or replacement of MAX5391LATE+?
All MAX5391LATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5391LATE+, 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 MAX5391LATE+ part is unused and in its original packaging.
Return procedure for MAX5391LATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX5391LATE+ Tags
-
MCP4018T-103E/LT
Microchip Technology
-
MCP4018T-503E/LT
Microchip Technology
-
MCP4011T-103E/SN
Microchip Technology
-
MCP4018T-104E/LT
Microchip Technology
-
MCP4017T-503E/LT
Microchip Technology
-
MCP4018T-502E/LT
Microchip Technology
-
MCP4017T-103E/LT
Microchip Technology
-
MCP4531T-103E/MF
Microchip Technology
-
MCP4021T-202E/SN
Microchip Technology
-
MCP4023T-103E/CH
Microchip Technology
-
MCP4022T-503E/CH
Microchip Technology
-
MCP4551T-502E/MS
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
