Analog Devices / Maxim Integrated MAX11410低功耗Δ-Σ ADC
Maxim MAX11410低功耗Δ-Σ模数转换器 (ADC) 是低功耗多通道24位Δ-Σ ADC，具有优化用于精密传感器测量的特性和规格。输入部分包括低噪声可编程增益放大器 (PGA)，具有非常高的输入阻抗和 1x 至 128x 的可用增益，以优化整体动态范围。输入缓冲器在 PGA 不用时将信号输入从开关电容器采样网络中隔离开来，使得 ADC 即便在高阻抗源下依然能够轻松驱动。多种集成特性可简化精密传感器应用。可编程的匹配电流源为电阻式传感器提供励磁。额外的拉电流和灌电路辅助检测损坏的传感器电线。10 通道输入多路复用器为复杂的多传感器测量提供所需的灵活性。借助GPIO，可减少隔离元件数量以及轻松控制开关或其他电路。
特性
- High resolution and low noise for signal sources with a wide dynamic range
- 24-bit resolution
- Programmable gain amplifier with 1, 2, 4, 8, 16, 32, 64, and 128 gain options
- 90dB simultaneous 60Hz and 50Hz power line rejection
- 3ppm typical INL with no missing codes
- Optimized features for more efficient system design
- Ten analog inputs usable for single-ended/fully differential in any combination
- Two dedicated/one shared differential voltage reference inputs
- On-demand offset and gain self-calibration
- Low power for efficient systems
- 2.7V to 3.6V analog supply range
- 1.7V to 3.6V I/O supply range
- <1μA sleep mode
- Standard SPI-compatible control interface
- Selectable internal/external oscillator
- 40°C to +125°C operating temperature range
- 4mm x 4mm TQFN-28 package
- Lead-free and RoHS compliant
应用
- Portable instruments
- Resistive bridge measurement
- Sensor measurement
框图
The MAX11410 offers several integrated features that simplify precision sensor applications. The programmable matched current sources provide excitation for resistive sensors—an additional current sink and current source aid in detecting broken sensor wires. The 10-channel input multiplexer provides the flexibility needed for complex, multi-sensor measurements. The GPIOs reduce isolation components and ease control of switches or other circuitry.
The digital filter settles within a single conversion cycle when used in single-cycle mode. The available FIR digital filter allows single-cycle settling in 16ms while providing more than 90dB simultaneous rejection of 50Hz and 60Hz line noise.
The integrated on-chip oscillator requires no external components. If needed, an external clock source may be used instead. Control registers and conversion data are accessed through the SPI-compatible serial interface.
The Analog Devices MAX11410 Delta-Sigma ADC is offered in a small 28-Pin 4mm x 4mm TQFN package and is lead-free and RoHS compliant.