ADC141S626 - 14 位、50 kSPS 至 250 kSPS、差动输入、微功耗 A/D 转换器

ADC141S626是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADC141S626是14 位、50 kSPS 至 250 kSPS、差动输入、微功耗 A/D 转换器，本站介绍了ADC141S626的封装应用图解、特点和优点、功能等，并给出了与ADC141S626相关的TI元器件型号供参考。

ADC141S626 - 14 位、50 kSPS 至 250 kSPS、差动输入、微功耗 A/D 转换器 - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

The ADC141S626 is a 14-bit, 50 kSPS to 250 kSPS sampling Analog-to-Digital (A/D) converter. The converter is based on a successive-approximation register (SAR) architecture where the differential nature of the analog inputs is maintained from the internal sample-and-hold circuits throughout the A/D converter to provide excellent common-mode signal rejection. The ADC141S626 features an external reference that can be varied from 1.0V to VA. It also features a zero-power track mode where the ADC is consuming the minimum amount of supply current while the internal sampling capacitor is tracking the applied analog input voltage.

The 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 conversion result is clocked out by the serial clock input and is the result of the conversion currently in progress; thus, ADC141S626 has no latency.

The ADC141S626 may be operated with independent analog (VA) and digital input/output (VIO) supplies. VA and VIO can range from 2.7V to 5.5V and can be set independent of each other. This allows a user to maximize performance and minimize power consumption by operating the analog portion of the ADC at a VA of 5V while communicating with a 3V controller on the digital side. With a 3V source, the power consumption when operating at 200 kSPS is 2.0 mW. With a 5V source, the power consumption when operating at 250 kSPS is 4.8 mW. The power consumption drops down to 4 µW and 13 µW respectively when the ADC141S626 enters acquisition (power-down) mode. The differential input, low power consumption, and small size make the ADC141S626 ideal for direct connection to bridge sensors and transducers in battery operated systems or remote data acquisition applications.

Operation is guaranteed over the temperature range of −40°C to +85°C and clock rates of 0.9 MHz to 4.5 MHz. The ADC141S626 is available in a 10-lead VSSOP package.

产品特性

True Differential Inputs
Guaranteed Performance from 50 kSPS to 250 kSPS
External Reference
Zero-Power Track Mode
Wide Input Common-Mode Voltage Range
Operating Temperature Range of −40°C to +85°C
SPI™/QSPI™/MICROWIRE/DSP Compatible Serial Interface

Key Specifications

Conversion Rate: 50 kSPS to 250 kSPS
INL: ± 0.95 LSB (Max)
DNL: ± 0.95 LSB (Max)
SNR: 82 dBc (Max)
THD: -90 dBc (Typ)
ENOB: 13.3 Bits(Min)
Power Consumption:
- 200 kSPS, 3V: 2.0 mW (Typ)
- 250 kSPS, 5V: 4.8 mW (Typ)
- Power-Down, 3V: 4 µW (Typ)
- Power-Down, 5V: 13 µW (Typ)

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