AD5258BRMZ10-R7 - 10kΩ 64-Tap I2C Nonvolatile DigiPOT | ADI
Référence : AD5258BRMZ10-R7 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.62 | $4,62 |
| 10 | $4.07 | $40,70 |
| 100 | $3.18 | $318,00 |
| 500 | $2.59 | $1 295,00 |
| 1 000 | $2.21 | $2 210,00 |
AD5258BRMZ10-R7 Présentation
A digital potentiometer is a solid-state replacement for a mechanical potentiometer or variable resistor. Within the broader signal-conditioning hierarchy it sits between passive resistive components and active gain stages; its purpose is to provide a digitally controllable resistance ratio (or absolute R) used for gain setting, bias trimming, LCD contrast adjustment, and sensor calibration. The AD5258 family (1 kΩ/10 kΩ/50 kΩ/100 kΩ variants) extends that concept with EEPROM-backed nonvolatile storage, removing the need for software re-initialization at power-up.
Key features include: 64-position resolution, I²C-compatible serial interface with address-decode pins AD0/AD1, a VLOGIC pin for mixed-voltage bus compatibility, software write-protect command, end-to-end resistance tolerance stored in EEPROM with 0.1% rcu accuracy, ±6% nominal R-total tolerance, 30 ppm/°C temperature coefficient, and power-on EEPROM refresh time under 1 ms. The device operates from 2.7 V to 5.5 V single supply with low quiescent draw.
Internally the AD5258 uses an EEPROM cell for each wiper position and a CMOS transmission-gate ladder network. Each tap is selected through an I²C write to internal registers, and the nonvolatile architecture guarantees that the last programmed wiper position is restored automatically on power-up, eliminating microcontroller boot-time calibration routines.
Typical applications include LCD display Vcom adjustment, audio attenuation and volume control, programmable gain amplifiers (PGA) and instrumentation amp gain trim, sensor bias calibration in industrial instrumentation, automotive infotainment and body controllers, and any mechanical-trimmer replacement where reliability, remote adjustment, or automated production calibration is required.
When designing with the AD5258BRMZ10, ensure the wiper current does not exceed the datasheet maximum to maintain R-total accuracy. Use the VLOGIC pin when interfacing to 1.8 V or 3.3 V microcontrollers while the potentiometer terminals operate at 5 V, and verify EEPROM write endurance limits if frequent re-programming is expected.
This page synthesizes distributor pricing, drop-in AD5258 same-family alternatives, and practical PCB / firmware design notes not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour AD5258BRMZ10-R7 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec AD5258BRMZ10-R7 (même facteur de forme et même empreinte) — différant par Resistance Tolerance, Interface, Number of Taps, Operating Temperature Range, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
AD5258BRMZ1-R7
✅ Remplacement direct✓ En stock
$1.05 / unité
Voir la fiche technique →AD5258BRMZ50-R7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD5258BRMZ100-R7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD5258BRMZ100
✅ Remplacement direct✓ En stock
$1.08 / unité
Voir la fiche technique →AD5258BRMZ10-RL7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD5258BRMZ10-R7 Valeurs maximales et caractéristiques électriques
| Fonction | Nonvolatile digital potentiometer (DigiPOT) |
| Number of Circuits | 1 |
| Number of Taps | 64 |
| End-to-End Resistance (R-TOTAL) | 10 kΩ |
| Resistance Tolerance | ±30% (stored in EEPROM, 0.1% rcu accuracy) |
| Interface | I²C-compatible (2-wire serial) |
| Type de mémoire | Nonvolatile EEPROM |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| Logic Interface Voltage (VLOGIC) | 1.8 V to 5.5 V |
| Temperature Coefficient | 30 ppm/°C (typ) |
| Power-On EEPROM Refresh | < 1 ms |
| Address Decode Pins | AD0, AD1 (4 slave addresses) |
| Plage de température de fonctionnement | -40 °C to +125 °C |
| Boîtier | 10-pin MSOP (3 mm × 4.9 mm) |
| Type de montage | Surface Mount |
| Niveau MSL | 1 (unlimited) |
| Statut RoHS | Compliant |
| Automotive Grade | Yes (BRMZ suffix, automotive-qualified) |
Configuration des broches de AD5258BRMZ10-R7
| Broche 1 | VDD — Power supply (2.7 V to 5.5 V) |
| Broche 2 | VLOGIC — Logic interface supply (1.8 V to 5.5 V) |
| Broche 3 | GND — Ground |
| Broche 4 | SCL — I²C serial clock input |
| Broche 5 | SDA — I²C serial data (bidirectional) |
| Broche 6 | AD0 — Address decode bit 0 (LSB) |
| Broche 7 | AD1 — Address decode bit 1 (MSB) |
| Broche 8 | A — Potentiometer terminal A (one end of resistor) |
| Broche 9 | W — Wiper terminal (programmable tap) |
| Broche 10 | B — Potentiometer terminal B (other end of resistor) |
Applications typiques
AD5258BRMZ10-R7 convient pour 6 applications: LCD Display VCOM Adjustment, Programmable Gain Amplifier (PGA) Trim, Audio Volume and Attenuation Control, Sensor Calibration and Bias Trim, Automotive Infotainment and Body Controllers, Mechanical Potentiometer Replacement / Remote Adjustment.
LCD Display VCOM Adjustment
The AD5258BRMZ10-R7 fits LCD VCOM adjustment networks because its 10 kΩ R-TOTAL and 64 taps (≈156 Ω per step) provide the fine voltage-tuning resolution needed to center the LCD common-plane voltage and minimize flicker. Its nonvolatile EEPROM eliminates the VCOM drift seen with mechanical trim pots that get knocked during assembly. Placed between the VCOM driver reference and ground, the part is controlled over I²C by the display controller, allowing factory or in-field recalibration without opening the chassis - a capability mechanical potentiometers cannot match.
Recommandé
Programmable Gain Amplifier (PGA) Trim
The AD5258BRMZ10-R7 is well suited to PGA gain-setting networks because its 10 kΩ R-TOTAL combined with 64 wiper positions delivers 6-bit gain resolution that lets the host MCU trim amplifier gain in production to within 0.1% rcu accuracy (per EEPROM-stored tolerance). Used in the feedback network of an op-amp, the DigiPOT replaces a precision resistor ladder, allowing software calibration of sensor offset and gain. The I²C interface and MSOP-10 footprint keep the calibration network small enough to fit inside sensors and instrumentation modules.
Recommandé
Audio Volume and Attenuation Control
Audio volume and tone-control stages benefit from the AD5258BRMZ10-R7 because its 10 kΩ R-TOTAL, 64 taps, and I²C control allow precise logarithmic-feel volume adjustment via firmware lookup tables. The low wiper resistance and CMOS switch architecture minimize Total Harmonic Distortion (THD) compared to mechanical pots that wear and become noisy. Its nonvolatile memory recalls the last volume setting at power-up, so head-units and portable speakers resume at the user-preferred level without MCU boot routines.
Recommandé
Sensor Calibration and Bias Trim
Industrial and medical sensor calibration uses the AD5258BRMZ10-R7 because its 10 kΩ R-TOTAL with 0.1% rcu EEPROM-stored accuracy allows per-unit offset and span calibration to be programmed in production and recalled on every power-up. The 30 ppm/°C temperature coefficient and -40 °C to +125 °C operating range (BRMZ automotive grade) make it suitable for harsh-environment transducers. Mounted on the sensor PCB it eliminates hand-trim stations, reducing manufacturing cost and improving long-term stability vs mechanical trimmers.
Recommandé
Automotive Infotainment and Body Controllers
The AD5258BRMZ10-R7 suits automotive applications because the BRMZ suffix denotes AEC-Q100 qualification, and its nonvolatile wiper storage ensures climate-control setpoints, mirror positions, and audio volumes persist through battery disconnect events. Operating from 2.7 V to 5.5 V with separate VLOGIC, it interfaces directly to 3.3 V automotive MCUs without level shifters. The compact 3 mm × 4.9 mm MSOP-10 footprint fits behind dashboard clusters where PCB area is constrained.
Recommandé
Mechanical Potentiometer Replacement / Remote Adjustment
The AD5258BRMZ10-R7 is the canonical replacement for mechanical potentiometers in any system that benefits from remote or automated calibration - including sealed enclosures, rotating equipment, and hazardous locations where a human adjuster cannot access the trim. The 10 kΩ R-TOTAL, 64 taps, and I²C interface let a service technician adjust trim over a service bus without opening the chassis. The nonvolatile EEPROM eliminates the need to re-calibrate after each power cycle, and the solid-state design eliminates the wear-out failure mode of mechanical pots.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AD5258BRMZ10-R7 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | AD5258BRMZ1-R7 | AD5258BRMZ50-R7 | AD5258BRMZ100-R7 | AD5258BRMZ10 | AD5258BRMZ10-RL7 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | MSOP-10 (3 mm × 4.9 mm) | MSOP-10 - same | MSOP-10 - same | MSOP-10 - same | MSOP-10 - same | MSOP-10 - same |
| End-to-End Resistance (R-TOTAL) | 10 kΩ | 1 kΩ | 50 kΩ | 100 kΩ | 10 kΩ | 10 kΩ |
| Number of Taps | 64 | 64 | 64 | 64 | 64 | 64 |
| Interface | I²C | I²C | I²C | I²C | I²C | I²C |
| Supply Voltage (VDD) | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Memory Type | Nonvolatile EEPROM | Nonvolatile EEPROM | Nonvolatile EEPROM | Nonvolatile EEPROM | Nonvolatile EEPROM | Nonvolatile EEPROM |
| Automotive Grade | Yes (BRMZ, AEC-Q100) | Yes (BRMZ, AEC-Q100) | Yes (BRMZ, AEC-Q100) | Yes (BRMZ, AEC-Q100) | Yes (BRMZ, AEC-Q100) | Yes (BRMZ, AEC-Q100) |
| Packaging Format | Tape & Reel (R7, 1000/reel) | Tape & Reel (R7) | Tape & Reel (R7) | Tape & Reel (R7) | Tube | Tape & Reel (RL7, larger reel) |
Principaux différenciateurs
- Nonvolatile wiper memory with <1 ms power-on refresh (vs MCP4131 (Microchip SPI volatile DigiPOT))
- Separate VLOGIC pin for mixed-voltage I²C interfaces (vs DS1803 (Maxim 2-channel 7-bit I²C DigiPOT))
- Automotive-grade BRMZ qualification and 4-address decoding (vs Industry-standard mechanical potentiometers)
Notes de conception
The AD5258BRMZ10-R7 requires both VDD (potentiometer terminals, 2.7 V to 5.5 V) and VLOGIC (I²C bus, 1.8 V to 5.5 V) to be present before I²C communication is initiated. Decouple both rails with a 100 nF ceramic capacitor placed within 3 mm of the respective pins, plus a 1 µF bulk capacitor on VDD if the potentiometer terminals drive significant load current. In mixed-voltage systems, power VLOGIC before or simultaneously with VDD to avoid indeterminate I²C states during power-up sequencing.
Keep I²C SCL and SDA traces short (≤ 50 mm) and route them away from the potentiometer terminal traces (A, W, B) to avoid digital-noise coupling into the analog resistance network. If the wiper drives a high-impedance node (≥ 100 kΩ), add a small series resistor (10 Ω to 100 Ω) to dampen capacitive ringing. The VLOGIC pin should be tied to the MCU's I/O voltage even if that voltage equals VDD - this future-proofs the design for supply-rail changes.
Do not exceed the maximum wiper current specified in the datasheet; high currents shift R-TOTAL due to self-heating and accelerate EEPROM wear. Avoid leaving the wiper floating when the device is unpowered in a high-voltage circuit - if terminal voltages can exceed 5.5 V with VDD at 0 V, add external protection. When writing to EEPROM, observe the write-cycle timing and poll the ready bit before issuing the next command; back-to-back writes without ready acknowledgment can corrupt the stored wiper position.
At maximum wiper current (refer to datasheet for exact limit) into a 10 kΩ R-TOTAL, self-heating in the MSOP-10 package (theta_JA ≈ 150 °C/W on a standard JEDEC 4-layer board) can raise junction temperature by 30 °C to 50 °C above ambient. For continuous high-current applications, increase PCB copper area under the exposed pad or use multiple vias to inner thermal planes. At typical I²C pointer currents (≤ 1 mA) thermal rise is negligible and no heatsinking is required.
Informations de conformité
BRMZ suffix denotes AEC-Q100 automotive qualification. RoHS and REACH compliance per Analog Devices product page. Halogen-free status not explicitly stated in provided data.
