ADC122S655 - 双路 12 位、200 kSPS 至 500 kSPS、同步采样 A/D 转换器

ADC122S655是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADC122S655是双路 12 位、200 kSPS 至 500 kSPS、同步采样 A/D 转换器，本站介绍了ADC122S655的封装应用图解、特点和优点、功能等，并给出了与ADC122S655相关的TI元器件型号供参考。

ADC122S655 - 双路 12 位、200 kSPS 至 500 kSPS、同步采样 A/D 转换器 - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

The ADC122S655 is a dual 12-bit, 200 kSPS to 500 kSPS simultaneous sampling Analog-to-Digital (A/D) converter. The analog inputs on both channels are sampled simultaneously to preserve their relative phase information to each other. The converter is based on a successive-approximation register architecture where the differential nature of the analog inputs is maintained from the internal track-and-hold circuits throughout the A/D converter to provide excellent common-mode signal rejection. The ADC122S655 features an external reference that can be varied from 1.0V to VA.

The ADC122S655's serial data output is binary 2's complement and is compatible with several standards, such as SPI, QSPI, MICROWIRE, and many common DSP serial interfaces. The serial clock (SCLK) and chip select bar (CS) are shared by both channels.

Operating from a single 5V analog supply and a reference voltage of 2.5V, the total power consumption while operating at 500 kSPS is typically 11 mW. With the ADC122S655 operating in power-down mode, the power consumption reduces to 3 µW. The differential input, low power consumption, and small size make the ADC122S655 ideal for direct connection to sensors in motor control applications.

Operation is specified over the industrial temperature range of −40°C to +105°C and clock rates of 6.4 MHz to 16 MHz. The ADC122S655 is available in a 10-lead VSSOP package.

产品特性

True Simultaneous Sampling Differential Inputs
Specified Performance from 200 kSPS to 500 kSPS
External Reference
Wide Input Common-Mode Voltage Range
Single High-Speed Serial Data Output
Operating Temperature Range of −40°C to +105°C
SPI/QSPI/MICROWIRE/DSP Compatible Serial Interface

Key Specifications

Conversion Rate: 200 kSPS to 500 kSPS
INL: ±1 LSB (max)
DNL: ±0.95 LSB (max)
SNR: 71 dBc (min)
THD: -72 dBc (min)
ENOB: 11.25 bits (min)
Power Consumption at 500 kSPS
- Converting, VA = 5V, VREF = 2.5V: 11 mW (typ)
- Power-Down, VA = 5V, VREF = 2.5V: 3 µW (typ)

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