MAX191
PRODUCTIONLow-Power, 12-Bit Sampling ADC with Internal Reference and Power-Down
See MAX129X Family for New Designs
- Part Models
- 10
- 1ku List Price
- Starting From $16.12
Part Details
- 12-Bit Resolution, 1/2 LSB Linearity
- +5V or ±5V Operation
- Built-In Track/Hold
- Internal Reference with Adjustment Capability
- Low Power:
- 3mA Operating Mode
- 20µA Power-Down Mode
- 100ksps Tested Sampling Rate
- Serial and 8-Bit Parallel µP Interface
- 24-Pin Narrow DIP and Wide SO Packages
The MAX191 is a monolithic, CMOS, 12-bit analog-todigital converter (ADC) featuring differential inputs, track/hold (T/H), internal voltage reference, internal or external clock, and parallel or serial µP interface. The MAX191 has a 7.5µs conversion time, a 2µs acquisition time, and a guaranteed 100ksps sample rate.
The MAX191 operates from a single +5V supply or from dual ±5V supplies, allowing ground-referenced bipolar input signals. The device features a logic power-down input, which reduces the 3mA VDD supply current to 50µA max, including the internal-reference current.
Decoupling capacitors are the only external components needed for the power supply and reference. This ADC operates with either an external reference, or an internal reference that features an adjustment input for trimming system gain errors.
The MAX191 provides three interface modes: two 8-bit parallel modes, and a serial interface mode that is compatible with SPITM, QSPITM, and MICROWIRETM serialinterface standards.
APPLICATIONS
- Battery-Powered Data Logging
- PC Pen Digitizers
- High-Accuracy Process Control
- Electromechanical Systems
- Data-Acquisition Boards for PCs
- Automatic Testing Systems
- Telecommunications
- Digital-Signal Processing (DSP)
Documentation
Data Sheet 1
Reliability Data 1
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 |
|---|---|---|---|
| MAX191ACNG+ | Plastic Dual-In-Line, Narrow (0.3in) | ||
| MAX191ACWG+ | Small-Outline IC, Wide (0.3in) | ||
| MAX191ACWG+T | Small-Outline IC, Wide (0.3in) | ||
| MAX191AEWG+ | Small-Outline IC, Wide (0.3in) | ||
| MAX191BCNG+ | Plastic Dual-In-Line, Narrow (0.3in) | ||
| MAX191BCWG+ | Small-Outline IC, Wide (0.3in) | ||
| MAX191BCWG+T | Small-Outline IC, Wide (0.3in) | ||
| MAX191BENG+ | Plastic Dual-In-Line, Narrow (0.3in) | ||
| MAX191BEWG+ | Small-Outline IC, Wide (0.3in) | ||
| MAX191BEWG+T | Small-Outline IC, Wide (0.3in) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Parts | Product Life Cycle | Description |
|---|---|---|
| Single Channel A/D Converters 5 | ||
| MAX167 | LAST TIME BUY | CMOS, 5V Input, 100ksps, 12-Bit ADC with Track/Hold and Reference |
| MAX172 | PRODUCTION | Complete 10µs CMOS 12-Bit ADC |
| MAX183 | PRODUCTION | 3µs, 12-Bit ADC |
| MAX174 | PRODUCTION | Industry-Standard, Complete 12-Bit ADCs |
| MAX122 | PRODUCTION | 500ksps, Sampling, 12-Bit ADC with Track/Hold and Reference |
Evaluation Kits
Evaluation System/Evaluation Kit for the MAX191