美信推出2.7V、低功耗、8引脚SO封装的12位串行ADC-

The MAX1240/MAX1241 low-power, 12-bit analog-to-digital converters (ADCs) are available in 8-pin packages. The MAX1240 operates with a single +2.7V to +3.6V supply, and the MAX1241 operates with a single +2.7V to +5.25V supply. Both devices feature a 7.5µs successive-approximation ADC, a fast track/hold (1.5µs), an on-chip clock, and a high-speed, 3-wire serial interface.

Power consumption is only 37mW (V_DD = 3V) at the 73ksps maximum sampling speed. A 2µA shutdown mode reduces power at slower throughput rates.

The MAX1240 has an internal 2.5V reference, while the MAX1241 requires an external reference. The MAX1241 accepts signals from 0V to V_REF, and the reference input range includes the positive supply rail. An external clock accesses data from the 3-wire interface, which connects directly to standard microcontroller I/O ports. The interface is compatible with SPI™, QSPI™, and MICROWIRE™.

Excellent AC characteristics and very low power combined with ease of use and small package size make these converters ideal for remote-sensor and data-acquisition applications, or for other circuits with demanding power consumption and space requirements. The MAX1240/MAX1241 are available in 8-pin PDIP and SO packages.

关键特性

Single-Supply Operation:

• +2.7V to +3.6V (MAX1240)
• +2.7V to +5.25V (MAX1241)

12-Bit Resolution

Internal 2.5V Reference (MAX1240)

Small Footprint: 8-Pin DIP/SO Packages

Low Power: 3.7µW (73ksps, MAX1240)

• 3mW (73ksps, MAX1241)
• 66µW (1ksps, MAX1241)
• 5µW (power-down mode)

Internal Track/Hold

SPI/QSPI/MICROWIRE 3-Wire Serial Interface

Internal Clock

应用/使用

电池供电应用
仪表
隔离型数据采集
便携式数据记录
过程控制

功能框图