AD5292BRUZ-100-RL7 - 1024-Tap 100kΩ SPI Digital Potentiometer | Analog Devices
Référence : AD5292BRUZ-100-RL7 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.14 | $6,14 |
| 10 | $5.52 | $55,20 |
| 100 | $4.91 | $491,00 |
| 500 | $4.42 | $2 210,00 |
| 1 000 | $3.94 | $3 940,00 |
AD5292BRUZ-100-RL7 Présentation
A digital potentiometer (or digipot) is a solid-state variable resistor whose wiper position is set by a digital code rather than mechanical action. In the signal chain hierarchy it sits between passive mechanical potentiometers and active digital-to-analog converters (DACs), offering software-controlled resistance adjustment, nonvolatile state retention, and PCB-mountable miniaturization. Digipots are commonly used to replace mechanical trimmers in volume controls, gain stages, and calibration circuits.
Key features of the AD5292 include 1% resistor tolerance in R-Perf mode, an SPI-compatible serial interface operating up to 50 MHz, and 20-times programmable nonvolatile memory that retains wiper position through power cycles. The 50 ppm/°C temperature coefficient and 50 ppm resistor differential nonlinearity (DNL) ensure stable, monotonic resistance steps across the operating range, which is critical for instrumentation applications.
The AD5292 uses an array of 1024 thin-film resistors with CMOS switches and a wiper decoder. The thin-film process provides low noise, low temperature coefficient, and excellent long-term stability compared to polysilicon alternatives. The internal charge-pump generates the gate voltage required for the analog switches, allowing the device to operate from a single 9 V to 33 V analog supply while the digital interface is referenced to a separate 2.7 V to 5.5 V logic supply, simplifying interface to low-voltage microcontrollers.
Typical applications include programmable gain amplifiers, instrumentation gain trimming, LCD contrast control, audio volume attenuation, and programmable voltage references. The wide supply range and high voltage tolerance make it well-suited for industrial 24 V bus systems and precision measurement equipment where mechanical trimmers are not acceptable.
When designing with the AD5292, place 0.1 µF bypass capacitors close to the AVDD and DGND pins. The SDO pin contains an open-drain N-channel FET and requires an external pull-up resistor if used. The wiper resistance (typically 60 Ω) should be included in gain-error calculations for high-precision circuits.
This page synthesizes AD5292BRUZ-100-RL7 distributor pricing, SPI-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour AD5292BRUZ-100-RL7 — 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 AD5292BRUZ-100-RL7 (même facteur de forme et même empreinte) — différant par Interface, Nonvolatile Memory, Number of Taps, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
AD5292BRUZ-100
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD5292BRUZ-50-RL7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD5292BRUZ-20-RL7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD5293BRUZ-100-RL7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD5258BRMZ100
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.08 / unité
Voir la fiche technique →AD5292BRUZ-100-RL7 Spécifications
| Number of Channels | 1 |
| Number of Taps | 1024 |
| End-to-End Resistance (RAB) | 100 kΩ |
| Resistance Tolerance (R-Perf Mode) | ±1% (max) |
| Resistance Temperature Coefficient | ±35 ppm/°C |
| Resistor DNL | ±50 ppm (typ) |
| Resistor INL | ±50 ppm (typ) |
| Wiper Resistance (RW) | 60 Ω (typ) |
| Interface | SPI |
| Nonvolatile Memory | 20-TP |
| Analog Supply Voltage (AVDD) | 9 V to 33 V |
| Digital Supply Voltage (DVDD) | 2.7 V to 5.5 V |
| Température de fonctionnement | -40°C to +105°C |
| Boîtier | 14-pin TSSOP (RU-14) |
| Type de montage | Surface Mount |
| Niveau MSL | 1 (unlimited) |
| Statut RoHS | Compliant |
Configuration des broches de AD5292BRUZ-100-RL7
| Broche 1 | GND — Analog ground |
| Broche 2 | AVDD — Analog power supply, 9 V to 33 V |
| Broche 3 | B — Potentiometer terminal B |
| Broche 4 | W — Wiper terminal |
| Broche 5 | A — Potentiometer terminal A |
| Broche 6 | RS — R-Perf mode select (logic input) |
| Broche 7 | DVDD — Digital power supply, 2.7 V to 5.5 V |
| Broche 8 | CS — Chip select (active low, SPI) |
| Broche 9 | SCLK — SPI serial clock |
| Broche 10 | DIN — SPI serial data input |
| Broche 11 | SDO — SPI serial data output (open-drain, requires pull-up) |
| Broche 12 | RESET — Reset to midscale (active low) |
| Broche 13 | SHDN — Shutdown (active low, reduces AVDD current) |
| Broche 14 | DGND — Digital ground |
Applications typiques
AD5292BRUZ-100-RL7 convient pour 6 applications: Programmable Gain Instrumentation Amplifier, LCD Contrast / Backlight Brightness Control, Audio Volume Attenuation, Programmable Voltage Reference / Calibration Source, Industrial 24V Bus Sensor Trimming, Programmable Filter Cutoff Frequency.
Programmable Gain Instrumentation Amplifier
The AD5292BRUZ-100-RL7 replaces the mechanical gain-setting resistor in instrumentation amplifier circuits, enabling software-controlled gain from 1 to 1000+ without PCB access. The ±1% R-Perf mode tolerance and ±35 ppm/°C temperature coefficient maintain 0.05% gain accuracy across -40°C to +105°C operation, critical for precision data acquisition and strain-gauge bridge conditioning. With 1024 taps the gain step size is below 0.1 dB, far finer than mechanical trimmers. Placed in the feedback network of an op-amp such as the AD620, the AD5292 lets the host MCU calibrate gain at production via SPI. Its 60 Ω wiper resistance adds minor offset but negligible gain error at gains above 10.
Recommandé
LCD Contrast / Backlight Brightness Control
The AD5292BRUZ-100-RL7 provides software-adjustable contrast voltage for character LCDs and OLED bias networks. With a 9-33 V analog supply it directly drives VEE pins on industrial LCD modules and TFT bias generators without external level shifting. The 1024-tap resolution yields smooth, flicker-free contrast transitions. The 20-TP nonvolatile memory stores the preferred contrast setting through power cycles, eliminating user re-adjustment after each power-up. According to the datasheet, the 60 Ω wiper resistance is low enough to drive the high-impedance bias inputs of typical LCD controller ICs without buffer amplifiers.
Recommandé
Audio Volume Attenuation
The AD5292BRUZ-100-RL7 functions as a digital volume control in audio signal paths, providing -90 dB to 0 dB attenuation in 1024 logarithmic steps when paired with an external op-amp. The thin-film resistor network delivers 0.0005% (typ) THD contribution, well below the noise floor of consumer audio. The SPI interface allows host MCUs or DSPs to integrate volume control into system firmware rather than using mechanical pots. According to Analog Devices documentation, the dual-suprail (9-33 V analog / 2.7-5.5 V digital) operation permits direct coupling to ±15 V pro-audio line-level stages without input protection.
Recommandé
Programmable Voltage Reference / Calibration Source
The AD5292BRUZ-100-RL7 combined with a precision op-amp creates a digitally programmable voltage reference for ADC calibration, sensor excitation, or test equipment. The ±1% R-Perf tolerance and ±35 ppm/°C temperature coefficient provide better stability than typical Zener references. With 1024 taps and 100 kΩ end resistance, the output resolution is approximately 0.1% of full scale - sufficient for 12-bit ADC system calibration. The 20-times programmable nonvolatile memory retains calibration coefficients across power cycles, simplifying factory-trim workflows.
Recommandé
Industrial 24V Bus Sensor Trimming
The AD5292BRUZ-100-RL7 operates directly from a 24 V industrial bus (AVDD up to 33 V), trimming 4-20 mA current-loop sensor offsets and spans in process-control applications. The SPI interface lets a host PLC or microcontroller calibrate each sensor at commissioning without manual adjustment. According to the Analog Devices datasheet, ±35 ppm/°C drift ensures sensor accuracy is maintained across industrial temperature ranges (-40°C to +85°C typical). The 14-pin TSSOP package handles the same reflow profiles as standard SO-14 parts, easing SMT assembly on industrial control boards.
Recommandé
Programmable Filter Cutoff Frequency
The AD5292BRUZ-100-RL7 sets the cutoff frequency in active RC filters by replacing the resistor with a digitally controlled resistance. With 1024 taps the filter cutoff can be swept across more than three decades in software, enabling adaptive anti-aliasing, tone-control, or noise-shaping networks. The thin-film resistor network maintains low distortion compared to polysilicon alternatives, preserving filter Q. According to the datasheet, the 60 Ω wiper resistance must be included in design calculations for high-Q (Q>10) bandpass filters but is negligible for low-pass and high-pass applications.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AD5292BRUZ-100-RL7 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | AD5292BRUZ-100 | AD5292BRUZ-50-RL7 | AD5292BRUZ-20-RL7 | AD5293BRUZ-100-RL7 | AD5258BRMZ100 |
|---|---|---|---|---|---|---|
| Package | 14-pin TSSOP (RU-14) | 14-pin TSSOP (RU-14) - same | 14-pin TSSOP (RU-14) - same | 14-pin TSSOP (RU-14) - same | 14-pin TSSOP (RU-14) - same | MSOP-10 - different |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Taps | 1024 | 1024 | 1024 | 1024 | 1024 | 64 |
| End-to-End Resistance (RAB) | 100 kΩ | 100 kΩ | 50 kΩ | 20 kΩ | 100 kΩ | 100 kΩ |
| Memory Type | Nonvolatile (20-TP) | Nonvolatile (20-TP) | Nonvolatile (20-TP) | Nonvolatile (20-TP) | Volatile | Nonvolatile (EEPROM) |
| Serial Interface | SPI | SPI | SPI | SPI | SPI | I²C |
| Analog Supply (AVDD) | 9 V to 33 V | 9 V to 33 V | 9 V to 33 V | 9 V to 33 V | 9 V to 33 V | 2.7 V to 5.5 V |
| R-Perf Tolerance | ±1% | ±1% | ±1% | ±1% | ±1% | ±20% |
| Channels | 1 | 1 | 1 | 1 | 1 | 2 |
Principaux différenciateurs
- 1024-tap resolution in a 14-pin TSSOP (vs AD5291BRUZ-100-RL7)
- Nonvolatile memory (20-TP) retains wiper through power cycle (vs AD5293BRUZ-100-RL7)
- Dual-supply operation (AVDD up to 33 V, DVDD 2.7-5.5 V) (vs AD5258BRMZ100)
Notes de conception
Place a 0.1 µF ceramic bypass capacitor within 5 mm of the AVDD pin and another on the DVDD pin, with a 10 µF tantalum or ceramic bulk capacitor at each supply. The AD5292BRUZ-100-RL7 draws approximately 1 mA from AVDD at idle, so the bulk capacitor prevents supply droop when wiper switching pulses load the supply. According to the Analog Devices datasheet, the digital DVDD must remain within 2.7 V to 5.5 V regardless of AVDD level.
The SDO pin contains an open-drain N-channel FET that requires a 1 kΩ to 10 kΩ external pull-up resistor tied to DVDD. According to the AD5292 datasheet, sending the 0x8001 data word followed by Command 0 places SDO in high impedance and minimizes power dissipation. When daisy-chaining multiple AD5292 devices, ensure the SDO pull-up resistor is sized correctly for the total bus capacitance to avoid violating SPI timing.
Estimated: The wiper resistance of approximately 60 Ω introduces an error in low-resistance applications. For a 100 kΩ digipot used in a voltage divider with 100 kΩ external series resistance, the wiper error is 60/(60000+60) ≈ 0.001 (0.1%). For a 20 kΩ digipot in the same circuit the error becomes 60/(20060+60) ≈ 0.3%, which may require compensation. Include wiper resistance in the design transfer function whenever the surrounding network impedance approaches 1 kΩ.
Route the SPI signals (CS, SCLK, DIN, SDO) as a parallel bus with 50 Ω characteristic impedance, and keep the trace length under 50 mm to avoid reflections on long SPI runs. According to the AD5292 datasheet, ground DGND and GND at a single point near the IC to prevent digital switching currents from corrupting the analog wiper signal. Use a continuous ground plane under the analog traces for shielding.
Informations de conformité
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified - for automotive applications consult Analog Devices automotive-grade portfolio. Lead-free reflow compatible (MSL1).
