Описание
The MAX1080 10-bit analog-to-digital converters (ADCs) combine an 8-channel analog-input multiplexer, high-bandwidth track/hold (T/H), and serial interface with high conversion speed and low power consumption. The MAX1080 operates from a single +4.5V to +5.5V supply; devices’ analog inputs are software configurable for unipolar/bipolar and single-ended/pseudo-differential operation. The 4-wire serial interface connects directly to SPI/QSPI and MICROWIRE devices without external logic. A serial strobe output allows direct connection to TMS320-family digital signal processors. The MAX1080 use an external serial-interface clock to perform successive-approximation analog-to-digital conversions. The devices feature an internal +2.5V reference and a reference-buffer amplifier with a ±1.5% voltage-adjustment range. An external reference with a 1V to VDD1 range may also be used. The MAX1080 provide a hard-wired SHDN pin and four software-selectable power modes (normal operation, reduced power (REDP), fast power-down (FASTPD), and full power-down (FULLPD)). These devices can be programmed to automatically shut down at the end of a conversion or to operate with reduced power. When using the power-down modes, accessing the serial interface automatically powers up the devices, and the quick turnon time allows them to be shut down between all conversions. This technique can cut supply current below 100mA at lower sampling rates. The MAX1080 is available in a 20-pin TSSOP package. These devices are higher-speed versions of the MAX148/MAX149.
- 8-Channel Single-Ended or 4-Channel Pseudo-Differential Inputs
- Internal Multiplexer and Track/Hold
- Single-Supply Operation +4.5V to +5.5V (MAX1080)
- Internal +2.5V Reference
- 400ksps Sampling Rate (MAX1080)
- Low Power: 2.5mA (400ksps) 1.3mA (REDP) 0.9mA (FASTPD) 2µA (FULLPD)
- SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface
- Software-Configurable Unipolar or Bipolar Inputs
- 20-Pin TSSOP Package
