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Analog Devices Inc./Maxim Integrated DS1803E-100+
- Part No.:
- DS1803E-100+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DS1803E-100+.pdf
- Description:
- IC DGT POT 100KOHM 256TP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,772
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Product details
Overview
DS1803E-100+ from Maxim Integrated is a dual-channel, volatile, 256-position digital potentiometer in 14-pin TSSOP package with 100kΩ end-to-end resistance, 2-wire I²C-compatible serial interface, and industrial temperature range (-40°C to +85°C), used for precision gain/offset trimming in sensor signal conditioning circuits.
For engineers reviewing the DS1803E-100+ datasheet, DS1803E-100+ pinout, DS1803E-100+ application, or DS1803E-100+ equivalent, key selection considerations include wiper position volatility, 100kΩ resistance tolerance (±20%), 400μA max active supply current, and compatibility with standard-mode I²C bus (100kHz clock).
Technical Context
The DS1803E-100+ implements two independent resistor arrays, each with 256 tap positions controlled by dedicated 8-bit registers. Wiper terminals (W0/W1) are multiplexed across the full resistor ladder, with H0/H1 at FFh and L0/L1 at 00h positions. Address inputs A0–A2 enable up to eight devices on a shared I²C bus.
It operates as a slave-only I²C device with fixed 4-bit control code 0101, supporting read (R/W=1) and three write commands (write pot-0, pot-1, or both). The device lacks nonvolatile storage: wipers reset to 00h (L-terminal) on power-up, requiring host initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 100kΩ ±20% - sets analog signal attenuation/gain range and load interaction in voltage-divider configurations |
| Resolution | 100kΩ/255 ≈ 392Ω per step - determines minimum adjustable voltage step in bias networks |
| Interface | 2-wire I²C-compatible (standard mode, 100kHz max) - enables daisy-chaining with up to 7 other DS1803 devices using A0–A2 address lines |
| Supply Voltage | +2.7V to +5.5V - supports direct interfacing with 3.3V or 5V microcontrollers without level shifting |
| Wiper Resistance | 400Ω to 1000Ω - contributes directly to signal path error and THD in AC-coupled applications |
| Operating Temperature | -40°C to +85°C - validated for industrial-grade embedded systems including motor control feedback loops |
| Supply Current | 200μA typical active, 20–40μA standby - enables low-power battery-operated calibration subsystems |
Pinout & Package
DS1803E-100+ uses a 14-pin TSSOP package (173 mil width), surface-mount compatible with automated assembly. Pin 1 is H1; pin 14 is VCC. NC pins (pins 2 and 13 in TSSOP) must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| H1 | High-end terminal of potentiometer 1 | Fixed connection point for top of 100kΩ resistor ladder; referenced to VCC or signal source |
| L1 | Low-end terminal of potentiometer 1 | Fixed connection point for bottom of resistor ladder; typically tied to GND or reference voltage |
| W1 | Wiper output of potentiometer 1 | Digitally steerable tap point delivering intermediate voltage between H1 and L1 |
| A2, A1, A0 | Chip select address inputs | Binary-encoded hardware address (0–7) enabling multiple DS1803E-100+ units on one I²C bus |
| SDA | Serial data I/O (open-drain) | Bidirectional I²C data line requiring external pull-up; shares bus with other I²C slaves |
| SCL | Serial clock input (open-drain) | Master-generated clock synchronizing all I²C transactions; must be pulled up externally |
| VCC | Power supply input | Accepts 2.7–5.5V; powers internal logic and resistor array; no internal regulation |
| GND | Ground reference | Analog and digital ground common point; critical for wiper voltage accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 256-tap potentiometers | Enables simultaneous adjustment of two analog paths (e.g., differential gain and offset) without inter-channel crosstalk |
| Volatile wiper register | Eliminates nonvolatile memory wear-out; requires host MCU to reinitialize wiper positions after every power cycle |
| Hardware addressable via A0–A2 | Supports up to eight DS1803E-100+ units on one I²C bus without software address remapping or additional GPIO |
| 100kΩ end-to-end resistance | Optimized for high-impedance sensor interfaces (e.g., thermistor bridges, RTD amplifiers) minimizing loading error |
| Industrial temperature rating | Guarantees stable resistance tolerance and wiper linearity across -40°C to +85°C ambient, critical for outdoor instrumentation |
Applications
| Temperature Sensor Calibration | Audio Channel Balance Control |
|---|---|
Use Scenario: Calibrating offset and gain errors in analog front-ends for RTD or thermistor-based temperature measurement systems. IC Role / Device Role / Timing Role: Dual-potentiometer providing independent DC bias and span adjustment in instrumentation amplifier feedback networks. Use Value: 100kΩ resistance matches typical sensor bridge impedances; 256-step resolution enables <±0.4°C calibration granularity over 0–100°C range. | Use Scenario: Adjusting left/right channel volume balance in professional audio mixers with analog signal paths. IC Role / Device Role / Timing Role: Digitally controlled attenuator replacing mechanical pots in stereo line-level signal chains. Use Value: Matched dual channels ensure consistent channel tracking; 100kΩ value avoids loading op-amp outputs while maintaining >90dB channel separation. |
| Programmable Reference Voltage Generator | Motor Current Feedback Scaling |
Use Scenario: Generating precise, software-adjustable reference voltages for ADCs or comparators in programmable logic controllers. IC Role / Device Role / Timing Role: Voltage divider configured with H0–W0–L0 to produce ratiometric reference from system VCC. Use Value: 100kΩ value minimizes current draw (<55μA at 5.5V); volatile operation allows dynamic recalibration during runtime. | Use Scenario: Scaling shunt-resistor voltage feedback in closed-loop motor drive current regulators. IC Role / Device Role / Timing Role: Gain-setting element in transconductance amplifier stage controlling PWM duty cycle based on sensed current. Use Value: 400–1000Ω wiper resistance ensures minimal impact on loop stability; industrial temp rating supports operation near power-stage heat sinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5242BRUZ100 | Nonvolatile EEPROM storage; 256 taps; same 100kΩ resistance; I²C interface; 16-pin TSSOP | Retains last wiper setting through power cycles; eliminates host initialization overhead | Select when persistent calibration state is required and PCB layout accommodates 16-pin footprint |
| MCP42100-I/SL | Volatile operation; SPI interface; 100kΩ; 14-pin SOIC; 10-bit resolution (1024 steps) | Higher resolution but incompatible bus protocol; requires SPI-capable MCU and additional chip-select line | Select when finer adjustment granularity is needed and SPI resources are available |
Compared with AD5242BRUZ100 and MCP42100-I/SL, the DS1803E-100+ offers lowest component cost and smallest PCB footprint (14-pin TSSOP), but requires guaranteed host MCU initialization at boot and lacks SPI flexibility or nonvolatile retention.
Availability
DS1803E-100+ is available at Aetrix Electronics and suitable for industrial sensor calibration, audio equipment manufacturing, and motor control design requiring stable component supply with lead-free RoHS-compliant packaging.
Supply support for DS1803E-100+ 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) designs precision analog and mixed-signal ICs for industrial, automotive, and communications applications.
The DS1803 product line delivers digitally programmable resistance solutions for trimming, calibration, and gain control in space-constrained, temperature-stable environments.
FAQ
Does DS1803E-100+ retain wiper position after power loss?
No, DS1803E-100+ is a volatile digital potentiometer. Upon power-up, both wipers reset to position 00h (connected to L0/L1 terminals). Host firmware must reprogram desired wiper values via I²C after each power cycle. This behavior is inherent to the DS1803E-100+ architecture and cannot be altered.
What is the maximum I²C clock frequency supported by DS1803E-100+?
The DS1803E-100+ supports standard-mode I²C operation up to 100kHz. It does not support fast-mode (400kHz) timing - attempting higher frequencies may cause communication failures or incomplete register writes. All timing parameters (tLOW, tHIGH, tSU:DAT) in the DS1803E-100+ datasheet are specified for ≤100kHz operation.
Can DS1803E-100+ be used with 3.3V microcontrollers?
Yes, DS1803E-100+ operates from 2.7V to 5.5V and is fully compatible with 3.3V logic systems. Its VIH threshold is 0.7×VCC (≥2.31V at 3.3V), and VIL is ≤0.3×VCC (≤0.99V), ensuring reliable I²C signaling with standard 3.3V MCUs without level shifters.
How many DS1803E-100+ devices can share one I²C bus?
Up to eight DS1803E-100+ units can share a single I²C bus using the A0, A1, and A2 hardware address pins. Each combination of A0–A2 sets a unique 3-bit address (000 to 111), allowing individual addressing without software configuration. All devices respond only to their assigned address byte (0101xxxA).
Is the 100kΩ resistance value of DS1803E-100+ matched between the two potentiometers?
DS1803E-100+ specifies end-to-end resistance tolerance as ±20% for each potentiometer independently. While fabricated on the same die, Maxim does not guarantee inter-channel matching beyond standard process variation. For applications requiring tight ratio matching (e.g., differential amplifiers), external calibration or post-fabrication selection is recommended - the DS1803E-100+ datasheet does not specify channel-to-channel resistance matching.
DS1803E-100+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 256
- Resistance (Ohms):
- 100k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 750ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-TSSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 400
DS1803E-100+ FAQ
1.How can I place an order for DS1803E-100+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1803E-100+ 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 DS1803E-100+ reliable?
The price and inventory of DS1803E-100+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1803E-100+ is usually 5 days.
3.What payment methods are accepted for DS1803E-100+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1803E-100+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1803E-100+?
DS1803E-100+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1803E-100+ 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 DS1803E-100+?
For technical support, including DS1803E-100+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1803E-100+ requirements.
6.How does Aetrix verify that DS1803E-100+ is sourced from the original manufacturer or authorized distributors?
All DS1803E-100+ 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 DS1803E-100+ meets industry standards.
7.What is the process for return or replacement of DS1803E-100+?
All DS1803E-100+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1803E-100+, 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 DS1803E-100+ part is unused and in its original packaging.
Return procedure for DS1803E-100+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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