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MAX11905
20-Bit, 1.6Msps, Low-Power, Fully Differential SAR ADC
Fastest and Lowest Power 20-Bit SAR ADC
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Key Features
Applications/Uses
Parametric specs for Precision ADCs (< 5Msps)
| Resolution (bits) (ADC) | 20 |
| # Input Channels | 1 |
| Conv. Rate (ksps) (max) | 1600 |
| Data Bus | DSP-Compatible Serial Microwire QSPI SPI |
| ADC Architecture | SAR |
| Diff/S.E. Input | Diff. Only |
| External VREF (V) (min) | 2.5 |
| External VREF (V) (max) | 3.6 |
| Unipolar VIN (V) (max) | 3.6 |
| INL (±LSB) | 6 |
| Package/Pins | TQFN/20 |
| Budgetary Price (See Notes) | 33.28 |
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Parameters
Parametric specs for Precision ADCs (<u><</u> 5Msps)
| Resolution (bits) (ADC) | 20 |
| # Input Channels | 1 |
| Conv. Rate (ksps) (max) | 1600 |
| Data Bus | DSP-Compatible Serial Microwire QSPI SPI |
| ADC Architecture | SAR |
| Diff/S.E. Input | Diff. Only |
| External VREF (V) (min) | 2.5 |
| External VREF (V) (max) | 3.6 |
| Unipolar VIN (V) (max) | 3.6 |
| INL (±LSB) | 6 |
| Package/Pins | TQFN/20 |
| Budgetary Price (See Notes) | 33.28 |
Key Features
- High DC/AC Accuracy Provides Better Measurement Quality
- 20-Bit Resolution with No Missing Codes
- ±6 LSB INL and ±1 LSB DNL Maximum at 20 Bits
- 98.3dB SNR and 98.1dB SINAD at fIN = 10kHz
- -123dB THD at fIN = 10kHz
- High Sampling Rate SAR Architecture Enables Fast Settling and Acquisition
- 1.6Msps Throughput with No Pipeline Delay
- Integration Simplifies Design
- Integrated Reference Buffers, VREF = 2.5V to 3.6V
- ±VREF Unipolar Differential Analog Input Range
- Scalable Ultra-Low Power Supply Reduces Power Consumption
- 9mW at 1.6Msps
- Flexible Low-Voltage Supplies Save Cost
- 1.8V Analog and Digital Core Supply
- 1.5V to 3.6V Digital Interface Supply
- 3.3V REFVDD Reference Buffer Supply
- Flexible, Industry-Standard Serial Interface and Small Package Reduce Size
- SPI-/QSPI™-/MICROWIRE®/DSP-Compatible
- 20-Pin, 4mm x 4mm, TQFN Package
Applications/Uses
- Automatic Test Equipment
- Battery-Powered Equipment
- Data Acquisition Systems
- Medical Instrumentation
- Process Control and Industrial Automation
- Telecommunications
- Test and Measurement
Description
The MAX11905 is a 20-bit, 1.6Msps, single-channel, fully differential SAR ADC with internal reference buffers. The MAX11905 provides excellent static and dynamic performance with best-in-class power consumption that directly scales with throughput. The device has a unipolar differential ±VREF input range. Supplies include a 3.3V supply for the reference buffers, a 1.8V analog supply, a 1.8V digital supply, and a 1.5V to 3.6V digital interface supply.
This ADC achieves 98.3dB SNR and -123dB THD, guarantees 20-bit resolution with no-missing codes and 6 LSB INL (max).
The MAX11905 communicates data using a SPI-compatible serial interface. The MAX11905 is offered in a 20-pin, 4mm x 4mm, TQFN package and is specified over the -40°C to +85°C operating temperature range.
This ADC achieves 98.3dB SNR and -123dB THD, guarantees 20-bit resolution with no-missing codes and 6 LSB INL (max).
The MAX11905 communicates data using a SPI-compatible serial interface. The MAX11905 is offered in a 20-pin, 4mm x 4mm, TQFN package and is specified over the -40°C to +85°C operating temperature range.
Technical Docs
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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