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Analog Devices Inc. AD5204BRU50-REEL
- Part No.:
- AD5204BRU50-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Potentiometers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD5204BRU50-REEL.pdf
- Description:
- IC DGT POT 50KOHM 256TAP 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,569
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Product details
Overview
AD5204BRU50-REEL from Analog Devices is a 4-channel, 256-position digital potentiometer with 50 kΩ end-to-end resistance, SPI-compatible 3-wire interface, ±2.7 V dual-supply or +2.7 V to +5.5 V single-supply operation, and midscale power-on reset-used for precision gain/offset trimming in instrumentation amplifiers and programmable filter tuning.
For engineers reviewing the AD5204BRU50-REEL datasheet, AD5204BRU50-REEL pinout, AD5204BRU50-REEL application, or AD5204BRU50-REEL equivalent, key selection criteria include channel count, terminal resistance tolerance (±30%), wiper resistance (50–100 Ω), THD (0.004%), and −3 dB bandwidth (137 kHz at 50 kΩ).
Technical Context
The AD5204BRU50-REEL implements four independent 8-bit digitally controlled variable resistors, each with its own latch updated via an 11-bit serial word (3 address + 8 data bits) on a positive-edge-triggered CLK. Address decoding (A2–A0) selects one of four RDAC channels per transaction.
It supports both rheostat (A–W or B–W) and potentiometer divider (A–B–W) configurations, with linear transfer functions: RWB(Dx) = (Dx/256) × RAB + RW and VW(Dx) = (Dx/256) × VAB + VB. Temperature coefficient is 700 ppm/°C for RAB and 15 ppm/°C for voltage divider output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent, individually addressable RDACs |
| Resolution | 8-bit (256 positions), monotonic guaranteed |
| Terminal Resistance | 50 kΩ ±30% at 25°C; fixed A–B value |
| Wiper Resistance | 50 Ω to 100 Ω - directly impacts minimum achievable resistance and signal path loss |
| Supply Range | +2.7 V to +5.5 V single supply or ±2.3 V to ±2.7 V dual supply - enables low-voltage and bipolar analog systems |
| Bandwidth (−3 dB) | 137 kHz at 50 kΩ - sets usable frequency limit for AC-coupled gain control |
| THD | 0.004% at 1 kHz - preserves signal fidelity in audio and precision measurement paths |
Pinout & Package
AD5204BRU50-REEL is housed in a 24-lead TSSOP package (RU-24), 3.9 mm × 8.7 mm body, 0.65 mm pitch, with exposed pad for thermal management. Pin 1 marked by dot; pins 1, 2, and 12 are NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 3) | Digital ground reference | Common return for logic and internal shift register; must be low-impedance connection |
| CS (Pin 4) | Chip select input (active low) | Initiates serial load cycle; rising edge decodes address bits and latches data into selected RDAC |
| PR (Pin 5) | Preset to midscale (active low) | Forces all four RDAC wipers to 0x80 code without SPI transaction - critical for fail-safe startup |
| VDD (Pin 6) | Positive supply | Supports 2.7–5.5 V; powers logic and internal switches; sum |VDD| + |VSS| < 5.5 V in dual mode |
| SHDN (Pin 7) | Shutdown control (active low) | Opens all Terminal A connections and shorts W to B - reduces current to ≤5 μA while retaining latch state |
| SDI (Pin 8) | Serial data input (MSB first) | Accepts 11-bit words (A2–A0 + D7–D0); requires clean edges to prevent bit errors |
| CLK (Pin 9) | Serial clock input (positive edge) | Drives shift register; min pulse width 20 ns; timing critical for reliable daisy-chain operation |
| SDO (Pin 10) | Serial data output (open-drain) | Enables daisy chaining; requires external pull-up; disabled during SHDN |
| VSS (Pin 11) | Negative supply | Supports 0 V or −2.7 V; enables true bipolar operation when paired with VDD |
| B1–B4, W1–W4, A1–A4 (Pins 13–24) | Resistor terminals | Each channel has dedicated A, W, B pins; no polarity restriction between terminals; max continuous current ±2.5 mA (50 kΩ) |
Key Features
| Feature | Design Value |
|---|---|
| Independent channel programming | Each of 4 RDACs retains its own 8-bit setting - enables simultaneous but distinct gain/offset adjustments across multiple signal paths |
| Midscale power-on preset | Wipers initialize to 0x80 at power-up - ensures known, stable bias point before firmware initialization |
| Open-drain SDO with daisy-chain support | Allows cascading multiple AD5204 devices using single MCU SPI port - eliminates GPIO or decoder logic |
| Low THD (0.004%) | Minimizes harmonic distortion in audio and sensor signal chains - suitable for 16-bit+ resolution systems |
| Shutdown mode with state retention | Reduces supply current to ≤5 μA while preserving wiper position - ideal for battery-powered or intermittent-use instruments |
Applications
| Instrumentation Gain Calibration | Programmable Filter Tuning |
|---|---|
Use Scenario: Automated calibration of op-amp gain stages in bench multimeters and data acquisition front-ends. IC Role / Device Role / Timing Role: Acts as digitally adjustable feedback resistor in noninverting amplifier configuration; updated via SPI during self-test sequence. Use Value: Enables traceable, repeatable gain adjustment without manual potentiometers; 0.25% nominal resistance match minimizes channel-to-channel error. | Use Scenario: Real-time cutoff frequency adjustment in anti-aliasing and reconstruction filters for mixed-signal test equipment. IC Role / Device Role / Timing Role: Sets RC time constant in active filter topologies (e.g., Sallen-Key); updated dynamically based on sampling rate changes. Use Value: 137 kHz −3 dB bandwidth at 50 kΩ supports filter tuning up to ~20 kHz; 15 ppm/°C voltage-divider tempco ensures stable corner frequency over temperature. |
| Line Impedance Matching | Programmable Voltage-to-Current Conversion |
Use Scenario: Dynamic termination of high-speed analog video lines (e.g., SDI, CVBS) in broadcast switchers and distribution amplifiers. IC Role / Device Role / Timing Role: Configures series or parallel termination resistance to match source/load impedance; adjusted per cable length or format. Use Value: 50 kΩ nominal resistance with ±30% tolerance covers standard 50 Ω to 75 Ω ranges; wiper resistance ≤100 Ω avoids insertion loss degradation. | Use Scenario: Setting precise transconductance in industrial 4–20 mA transmitter circuits with microcontroller-based loop calibration. IC Role / Device Role / Timing Role: Defines gain of voltage-controlled current source (e.g., Howland current pump); programmed during factory trim or field recalibration. Use Value: 8-bit resolution yields ~0.4% step size in 4–20 mA range; 700 ppm/°C RAB drift contributes <0.1% error over −40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5204BRU10-REEL | Same 4-channel, 256-position architecture but 10 kΩ end-to-end resistance; lower wiper resistance (~50 Ω typical); higher −3 dB bandwidth (721 kHz) | Better suited for higher-frequency gain control (e.g., RF IF stages) and lower-impedance current sensing | Select when bandwidth >200 kHz or source impedance <20 kΩ is required; not drop-in due to resistance mismatch |
| AD5204BRU100-REEL | Same architecture with 100 kΩ end-to-end resistance; lower current rating (±1.35 mA continuous); reduced bandwidth (69 kHz) | Optimized for high-impedance bias networks, sensor excitation, and ultra-low-power shutdown states | Select for micropower biasing where leakage <1 nA and supply current <12 μA are critical; incompatible for 50 kΩ matching needs |
Compared with AD5204BRU10-REEL and AD5204BRU100-REEL, the AD5204BRU50-REEL delivers balanced performance: sufficient bandwidth for audio and instrumentation filters, adequate current handling for 4–20 mA loops, and resistance value aligned with common PCB trace and cable impedance targets (e.g., 50 Ω systems).
Availability
AD5204BRU50-REEL is available at Aetrix Electronics and suitable for instrumentation calibration, programmable filter design, line impedance matching, and voltage-to-current conversion requiring stable component supply across industrial temperature ranges.
Supply support for AD5204BRU50-REEL 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and DSP ICs, serving precision instrumentation, industrial automation, and communications markets since 1965.
The AD5204 product line delivers multichannel digital potentiometers optimized for replacing mechanical trimmers in automated calibration, programmable analog signal conditioning, and adaptive filtering applications - emphasizing monotonicity, low THD, and robust SPI interface reliability.
FAQ
What is the terminal resistance tolerance and temperature coefficient of the AD5204BRU50-REEL?
The AD5204BRU50-REEL has a nominal terminal resistance of 50 kΩ with a tolerance of ±30% at 25°C. Its resistance temperature coefficient is 700 ppm/°C, meaning resistance changes by 0.07% per °C over the −40°C to +85°C operating range. This coefficient applies to the A–B end-to-end resistance and directly affects absolute resistance accuracy in temperature-varying environments.
Does the AD5204BRU50-REEL support dual-supply operation, and what are the valid voltage ranges?
Yes, the AD5204BRU50-REEL supports dual-supply operation with VDD and VSS pins. Valid dual-supply ranges are ±2.3 V to ±2.7 V, with the constraint that |VDD| + |VSS| < 5.5 V. This allows true bipolar analog signal handling - for example, ±2.5 V rails enable symmetric swing around ground in op-amp circuits without level-shifting.
How does the PR (Preset) pin function on the AD5204BRU50-REEL, and is it necessary for normal operation?
The PR pin on the AD5204BRU50-REEL is an active-low input that forces all four RDAC wipers to the midscale code (0x80) regardless of current latch contents. It is not required for normal SPI-based operation but provides hardware-level fault recovery - e.g., during brown-out conditions or system reset - ensuring predictable startup behavior without firmware intervention.
Can the AD5204BRU50-REEL be used in daisy-chain configuration, and what are the requirements?
Yes, the AD5204BRU50-REEL supports daisy chaining via its open-drain SDO pin. To implement this, connect SDO of one device to SDI of the next, use a single shared CLK and CS, and provide an external pull-up resistor (typically 1–10 kΩ) to a compatible voltage (up to 5 V, even if VDD = 3.3 V). The CS line must remain low until all 11-bit words for all devices are fully shifted in.
What is the maximum continuous current rating for the AD5204BRU50-REEL wiper terminals, and why is it limited?
The AD5204BRU50-REEL wiper terminals support a maximum continuous current of ±2.5 mA when configured with 50 kΩ or 100 kΩ end-to-end resistance. This limit arises from internal CMOS switch current-handling capability and thermal constraints - exceeding it risks contact degradation or permanent resistance drift. For 10 kΩ versions, the rating increases to ±5.65 mA due to lower on-resistance and better heat dissipation.
AD5204BRU50-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V, ±2.3V ~ 2.7V
- Features:
- Cascade Pin, Selectable Address
- Tolerance:
- ±30%
- Temperature Coefficient (Typ):
- 700ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-TSSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 50
AD5204BRU50-REEL FAQ
1.How can I place an order for AD5204BRU50-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD5204BRU50-REEL 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 AD5204BRU50-REEL reliable?
The price and inventory of AD5204BRU50-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD5204BRU50-REEL is usually 5 days.
3.What payment methods are accepted for AD5204BRU50-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD5204BRU50-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD5204BRU50-REEL?
AD5204BRU50-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD5204BRU50-REEL 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 AD5204BRU50-REEL?
For technical support, including AD5204BRU50-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD5204BRU50-REEL requirements.
6.How does Aetrix verify that AD5204BRU50-REEL is sourced from the original manufacturer or authorized distributors?
All AD5204BRU50-REEL 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 AD5204BRU50-REEL meets industry standards.
7.What is the process for return or replacement of AD5204BRU50-REEL?
All AD5204BRU50-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD5204BRU50-REEL, 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 AD5204BRU50-REEL part is unused and in its original packaging.
Return procedure for AD5204BRU50-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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