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Analog Devices Inc./Maxim Integrated MAX5430CEKA+
- Part No.:
- MAX5430CEKA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Potentiometers
- Package:
- SOT-23-8
- Datasheet:
-
MAX5430CEKA+.pdf
- Description:
- MAX5430 +/-15V DIGITALLY PROGRAM
- Quantity:
- Payment:
- Shipping:
Inventory:163
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Product details
Overview
MAX5430CEKA+ from Maxim Integrated is a digitally programmable precision resistor array designed as the feedback network in noninverting programmable-gain amplifiers (PGAs). It delivers four fixed gain settings (1, 2, 4, 8), 0.5% divider ratio accuracy, 57kΩ H-to-L resistance, and operates from ±15V or single +15V supply with only 35µA quiescent current - enabling high-accuracy gain control in industrial sensor signal conditioning.
For engineers reviewing the MAX5430CEKA+ datasheet, MAX5430CEKA+ pinout, MAX5430CEKA+ application, or MAX5430CEKA+ equivalent, this page provides verified pin functions, real-world PGA use cases, confirmed alternative parts with documented differences, and supply-chain support for volume procurement and BOM continuity.
Technical Context
The MAX5430CEKA+ implements a CMOS-based 2-bit parallel digital interface (D0/D1) to select one of four precision resistor-divider configurations, directly setting noninverting amplifier gain without external logic. Its internal architecture fixes the H–L end-to-end resistance at 57kΩ and maintains consistent 14kΩ wiper impedance across gains 2/4/8 - critical for op amp input bias-current balance.
Unlike the MAX5431 variant, the MAX5430CEKA+ omits the on-chip matching resistor (MATCH_H/MATCH_L pins are unconnected), requiring external bias-current compensation when used with standard op amps. It is specified over –40°C to +85°C and supports both dual ±12V to ±15V and single +12V to +15V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Settings | Four discrete noninverting gains: 1, 2, 4, and 8 - selected via D0/D1 logic inputs per truth table. |
| Divider Ratio Accuracy | ±0.5% at TA = +25°C - defines maximum gain error across all four settings under nominal conditions. |
| H-to-L Resistance | 57kΩ ±1% - sets absolute scale of feedback network and determines input impedance seen by source. |
| Wiper Impedance (Gains 2/4/8) | 14kΩ - matches op amp input resistance across multiple gain states to minimize offset voltage drift. |
| Supply Current | 35µA typical (IDD) - enables ultra-low-power PGA stages in battery-backed or energy-constrained systems. |
| Digital Interface | CMOS/TTL-compatible 2-wire parallel (D0/D1) - eliminates need for serial protocol overhead or level-shifting circuitry. |
| Operating Supply Range | +10.8V to +15.75V (VDD) and –15.75V to 0V (VSS) - supports rail-to-rail analog signal swing in ±15V systems. |
Pinout & Package
MAX5430CEKA+ uses an 8-pin SOT23 package (3.00mm × 2.60mm × 1.10mm body, JEDEC MO178 compliant) with gull-wing leads and coplanarity ≤ 0.1mm. Pin 1 identified by dot; lead pitch = 0.65mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive power supply | Accepts +10.8V to +15.75V; must be bypassed with 0.1µF ceramic capacitor to GND for stable operation. |
| D0 (Pin 2) | LSB digital input | Logic-level control (0/1) for gain selection; TTL/CMOS compatible; VIH ≥ 2.4V, VIL ≤ 0.8V. |
| VSS (Pin 3) | Negative power supply | Accepts –15.75V to 0V; connects to –15V rail in dual-supply mode or GND in single-supply mode. |
| L (Pin 4) | Low terminal of resistor divider | Analog reference node; connects to op amp inverting input or ground depending on PGA topology. |
| H (Pin 5) | High terminal of resistor divider | Analog input node; connects to op amp output in standard noninverting PGA configuration. |
| W (Pin 6) | Wiper terminal (gain output) | Provides voltage-divided feedback signal; presents 14kΩ impedance for gains 2/4/8, ~500Ω for gain 1. |
| D1 (Pin 7) | MSB digital input | Completes 2-bit gain address; D1/D0 combination selects gain per Table 1 (e.g., D1=1,D0=0 → gain=4). |
| GND (Pin 8) | Ground reference | Signal and digital ground return; must be low-impedance path to minimize noise coupling into analog nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Four precision noninverting gains | Fixed gain states (1, 2, 4, 8) eliminate trimming and calibration while maintaining monotonic step response. |
| 0.5% ratio accuracy | Guaranteed gain error bound ensures predictable system-level signal scaling without post-fabrication adjustment. |
| 57kΩ end-to-end resistance | Standardized impedance simplifies op amp stability analysis and reduces sensitivity to parasitic capacitance at W. |
| 14kΩ matched wiper impedance | Maintains balanced input resistance across gain settings 2/4/8 - critical for minimizing bias-current-induced offset. |
| 35µA supply current | Enables integration into low-power data acquisition front-ends where standby current budget is constrained. |
Applications
| Industrial Sensor Signal Conditioning | Programmable Instrumentation Amplifier |
|---|---|
|
Use Scenario: Scaling millivolt-level outputs from strain gauges, RTDs, or thermocouples across multiple measurement ranges. IC Role / Device Role / Timing Role: Precision resistor array defining closed-loop gain in noninverting PGA stage; replaces manual switch-selectable resistors. Use Value: Enables automatic range switching in PLC analog input modules with <±0.5% gain error - eliminating manual recalibration during field reconfiguration. |
Use Scenario: Configurable gain in portable multichannel data loggers measuring varying sensor types (e.g., pressure, flow, humidity). IC Role / Device Role / Timing Role: Digitally controlled feedback network in three-op-amp instrumentation amplifier topology. Use Value: Provides repeatable, software-selectable gain steps without relay wear or resistor tolerance stacking - improving long-term measurement repeatability. |
| Medical ECG Front-End | Test & Measurement Equipment |
|
Use Scenario: Adaptive gain control in low-noise ECG amplifiers to handle variable electrode-skin contact impedance. IC Role / Device Role / Timing Role: Programmable gain element in first-stage noninverting amplifier; interfaces directly with ultra-low-bias-current op amp. Use Value: Maintains constant 14kΩ input impedance at W across gain states 2/4/8 - reducing baseline wander caused by bias-current mismatch. |
Use Scenario: Gain selection in automated test equipment (ATE) channel cards requiring fast, repeatable signal scaling. IC Role / Device Role / Timing Role: Fixed-ratio voltage divider with digital addressability; integrated into FPGA-controlled analog signal path. Use Value: Achieves sub-microsecond gain switching (tD2W = 0.3µs) without settling artifacts - supporting high-throughput parametric testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable-resistor-array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5430BEKA+ | 0.09% divider ratio accuracy (vs. 0.5% for MAX5430CEKA+); otherwise identical pinout, package, and interface. | Suitable for higher-precision PGA designs where gain error must remain below ±0.1% across temperature. | Select MAX5430BEKA+ when system-level gain accuracy requirements exceed ±0.25% and cost premium is acceptable. |
| AD5260BRUZ20 | 20kΩ end-to-end potentiometer with I²C interface; ±30% resistance tolerance; no guaranteed ratio accuracy or wiper impedance matching. | Used in coarse gain adjustment or calibration trims - not for precision PGA feedback networks requiring monotonic, matched gain steps. | Choose AD5260BRUZ20 only for non-critical bias or offset tuning; not a functional substitute for MAX5430CEKA+ in gain-setting applications. |
Compared with MAX5430BEKA+, the MAX5430CEKA+ trades ratio accuracy for lower cost and sufficient performance in industrial sensor interfaces where ±0.5% gain error is acceptable. Compared with AD5260BRUZ20, it delivers guaranteed ratio matching, fixed gain states, and optimized wiper impedance - making it suitable for production-grade PGA designs requiring deterministic behavior.
Availability
MAX5430CEKA+ is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, programmable instrumentation amplifiers, medical ECG front-ends, and test & measurement equipment requiring stable component supply and extended temperature support (–40°C to +85°C).
Supply support for MAX5430CEKA+ 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 industrial, automotive, and communications applications.
The MAX5430 series belongs to Maxim's precision programmable resistor portfolio, engineered specifically for replacing mechanical gain-switching networks in high-stability, low-drift PGA implementations.
FAQ
What is the exact gain accuracy specification for MAX5430CEKA+?
The MAX5430CEKA+ has a divider ratio accuracy of ±0.5% at +25°C, as confirmed in the Electrical Characteristics table of the official datasheet. This applies to all four gain settings (1, 2, 4, 8) and is measured without load at the W pin. The device is guaranteed over the full –40°C to +85°C operating range, though accuracy degrades slightly with temperature - typical curves show ±0.01% variation across that range for ratio = 1.
Does MAX5430CEKA+ include an on-chip matching resistor for op amp bias-current compensation?
No, the MAX5430CEKA+ does not include an on-chip matching resistor. That feature is exclusive to the MAX5431 family (e.g., MAX5431CEUB+), which adds MATCH_H and MATCH_L pins. The MAX5430CEKA+ requires external bias-current compensation when used with op amps having significant input bias current - typically implemented using a matched resistor from the noninverting input to ground.
What is the wiper impedance of MAX5430CEKA+ at each gain setting?
The MAX5430CEKA+ presents 14kΩ wiper impedance (RW) for gain settings 2, 4, and 8 - ensuring consistent op amp input resistance across those states. At gain = 1, the internal connection between H and W results in a much lower ~500Ω wiper resistance, as stated in the Detailed Description section of the datasheet.
Can MAX5430CEKA+ operate from a single +15V supply?
Yes, the MAX5430CEKA+ supports single-supply operation: VDD = +12V to +15.75V and VSS = GND. In this configuration, the analog signal range is limited to 0V to VDD, and the device retains full functionality - including all four gain settings and 35µA supply current. Bypassing VDD to GND with a 0.1µF ceramic capacitor is required.
What is the switching time of MAX5430CEKA+ and how does it affect PGA performance?
The MAX5430CEKA+ has a typical switching time of 0.3µs (tD2W, tH2W) - the delay from digital input change to stable voltage at the W pin. This enables rapid gain reconfiguration in dynamic signal paths, such as automated test equipment or multi-range data acquisition. Performance remains stable provided board layout minimizes parasitic capacitance at the W node and the op amp exhibits low input capacitance.
MAX5430CEKA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 4
- Resistance (Ohms):
- 57k
- Interface:
- Parallel
- Memory Type:
- Volatile
- Voltage - Supply:
- 12V ~ 15V, ±12V ~ 15V
- Features:
- -
- Tolerance:
- -
- Temperature Coefficient (Typ):
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-8
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 14
MAX5430CEKA+ FAQ
1.How can I place an order for MAX5430CEKA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5430CEKA+ 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 MAX5430CEKA+ reliable?
The price and inventory of MAX5430CEKA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5430CEKA+ is usually 5 days.
3.What payment methods are accepted for MAX5430CEKA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5430CEKA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5430CEKA+?
MAX5430CEKA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5430CEKA+ 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 MAX5430CEKA+?
For technical support, including MAX5430CEKA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5430CEKA+ requirements.
6.How does Aetrix verify that MAX5430CEKA+ is sourced from the original manufacturer or authorized distributors?
All MAX5430CEKA+ 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 MAX5430CEKA+ meets industry standards.
7.What is the process for return or replacement of MAX5430CEKA+?
All MAX5430CEKA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5430CEKA+, 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 MAX5430CEKA+ part is unused and in its original packaging.
Return procedure for MAX5430CEKA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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