ADS7040集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

ADS7040属于集成电路（IC）的模数转换器（ADC）。由德州仪器制造生产的ADS7040模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。

1 Features

1• Industry's First SAR ADC with Nanowatt Power

Consumption:

– 234 μW at 1 MSPS with 1.8-V AVDD

– 690 μW at 1 MSPS with 3-V AVDD

– 69 μW at 100 kSPS with 3-V AVDD

– Less than 1 μW at 1 kSPS with 3-V AVDD

• Industry's Smallest SAR ADC:

– X2QFN-8 Package with 2.25-mm2 Footprint

• 1-MSPS Throughput with Zero Data Latency

• Wide Operating Range:

– AVDD: 1.65 V to 3.6 V

– DVDD: 1.65 V to 3.6 V (Independent of AVDD)

– Temperature Range: –40°C to 125°C

• Excellent Performance:

– 12-Bit Resolution with NMC

– ±1-LSB (Max) DNL and INL

– 70-dB SNR with 3-V AVDD

– –80-dB THD with 3-V AVDD

• Unipolar Input Range: 0 V to AVDD

• Integrated Offset Calibration

• SPI™-Compatible Serial Interface: 16 MHz

• JESD8-7A Compliant Digital I/O

2 Applications

• Low-Power Data Acquisition

• Battery-Powered Handheld Equipment

• Level Sensors

• Ultrasonic Flow Meters

• Motor Control

• Wearable Fitness

• Portable Medical Equipment

• Hard Drives

• Glucose Meters

3 Description

The ADS7042 is a 12-bit, 1-MSPS, analog-to-digital

converter (ADC). The device supports a wide analog

input voltage range (1.65 V to 3.6 V) and includes a

capacitor-based, successive-approximation register

(SAR) ADC with an inherent sample-and-hold circuit.

The SPI-compatible serial interface is controlled by

the CS and SCLK signals. The input signal is

sampled with the CS falling edge and SCLK is used

for conversion and serial data output. The device

supports a wide digital supply range (1.65 V to 3.6 V),

enabling direct interface to a variety of host

controllers. The ADS7042 complies with the JESD8-

7A standard for a normal DVDD range (1.65 V to

1.95 V).

The ADS7042 is available in 8-pin, miniature, leaded,

and X2QFN packages and is specified for operation

from –40°C to 125°C. Miniature form-factor and

extremely low-power consumption make this device

suitable for space-constrained, battery-powered

applications.