MAX1403
PRODUCTION+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC
Best Linearity for +3V, 18-Bit Sigma Delta
- Part Models
- 3
- 1ku List Price
- Starting From $16.64
Part Details
- 18-Bit Resolution, Sigma-Delta ADC
- 16-Bit Accuracy with No Missing Codes to 480sps
- Matched On-Board Current Sources (200µA) for Sensor Excitation
- Low Quiescent Current
- 250µA (operating mode)
- 2µA (power-down mode)
- 3 Fully Differential or 5 Pseudo-Differential Signal Input Channels
- 2 Additional, Fully Differential Calibration Channels/Auxiliary Input Channels
- Programmable Gain and Offset
- Fully Differential Reference Inputs
- Converts Continuously or On Command
- Automatic Channel Scanning and Continuous Data Output Mode
- Operates with Analog and Digital Supplies from +2.7V to +3.6V
- SPI™/QSPI™-Compatible 3-Wire Serial Interface
- 28-Pin SSOP Package
The MAX1403 18-bit, low-power, multichannel, serial-output analog-to-digital converter (ADC) features matched 200µA current sources for sensor excitation. This ADC uses a sigma-delta modulator with a digital decimation filter to achieve 16-bit accuracy. The digital filter's user-selectable decimation factor allows the conversion resolution to be reduced in exchange for a higher output data rate. True 16-bit performance is achieved at an output data rate of up to 480sps. In addition, the modulator sampling frequency may be optimized for either lowest power dissipation or highest throughput rate. The MAX1403 operates from +3V.
This device offers three fully differential input channels that may be independently programmed with a gain between +1V/V and +128V/V. Furthermore, it can compensate an input-referred DC offset up to 117% of the selected full-scale range. These three differential channels may also be configured to operate as five pseudo-differential input channels. Two additional, fully differential system-calibration channels are provided for gain and offset error correction.
The MAX1403 can be configured to sequentially scan all signal inputs and provide the results via the serial interface with minimum communications overhead. When used with a 2.4576MHz or 1.024MHz master clock, the digital decimation filter can be programmed to produce zeros in its frequency response at the line frequency and associated harmonics, ensuring excellent line rejection without the need for further postfiltering.
The MAX1403 is available in a 28-pin SSOP package.
Applications
- Loop-Powered Systems
- Portable Industrial Instruments
- Portable Weight Scales
- Pressure Sensors and Transducers
Documentation
Data Sheet 1
Reliability Data 1
Design Note 1
Technical Articles 5
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1403CAI+ | 28-SSOP-5.3_MM | ||
| MAX1403EAI+ | 28-SSOP-5.3_MM | ||
| MAX1403EAI+T | 28-SSOP-5.3_MM |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Parts | Product Life Cycle | Description |
|---|---|---|
| Multiplexed A/D Converters 4 | ||
| MAX1402 | PRODUCTION | +5V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC |
| MAX1401 | PRODUCTION | +3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC |
| MAX1400 | PRODUCTION | +5V 18-Bit Low-Power Multichannel Oversampling (Sigma-Delta) ADC |
| MAX11060 | PRODUCTION | 24-/16-Bit, 4-Channel, Simultaneous-Sampling, Cascadable, Sigma-Delta ADCs |
| Single Channel A/D Converters 1 | ||
| MAX195 | PRODUCTION | 16-Bit, 85ksps ADC with 10µA Shutdown |
Evaluation Kits
Evaluation System for the MAX1401 and MAX1403
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