ADS1283IRHFT集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

ADS1283IRHFT属于集成电路（IC）的模数转换器（ADC）。由德州仪器制造生产的ADS1283IRHFT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• High Resolution:

– SNR: 130 dB (250 SPS, PGA = 1)

• High Accuracy:

– THD: –122 dB

• Low Power Consumption:

– 18 mW (PGA = 1, 2, 4, or 8)

– Shutdown Mode: 10 μW

• Low-Noise PGA: 5 nV/√Hz

• Two-Channel Input Multiplexer

• Inherently-Stable Modulator With Fast Responding

Overrange Detector

• Flexible Digital Filter:

– Sinc + FIR + IIR (Selectable)

– Linear or Minimum Phase Response

– Programmable High-Pass Filter

– Selectable FIR Data Rates:

250 SPS to 4 kSPS

• Offset and Gain Calibration Engine

• SYNC Input

• Analog Supply: 5 V or ±2.5 V

• Digital Supply: 1.8 V to 3.3 V

2 Applications

• Energy Exploration

• Seismic Monitoring

• High-Accuracy Instrumentation

3 Description

The ADS1283 is an extremely high-performance,

single-chip, analog-to-digital converter (ADC) with an

integrated, low-noise programmable gain amplifier

(PGA) and two-channel input multiplexer (mux). The

ADS1283 is suitable for the demanding needs of

seismic monitoring equipment.

The converter uses a fourth-order, inherently stable,

delta-sigma (ΔΣ) modulator that provides outstanding

noise and linearity performance. The modulator digital

output is digitally filtered and decimated by the onchip

digital filter to yield the ADC conversion result.

The flexible input mux provides an additional external

input for measurement, as well as internal self-test

input connections. The PGA features outstanding low

noise (5 nV/√Hz) and very-high input impedance,

allowing easy interfacing to geophones and

hydrophones over a wide range of gains.

The digital filter provides selectable data rates from

250 to 4000 samples per second (SPS). The highpass

filter (HPF) features an adjustable corner

frequency. On-chip gain and offset scaling registers

support system calibration.

The synchronization input (SYNC) can be used to

synchronize the conversions of multiple ADS1283

devices.

The ADS1283 is available in a compact 24-lead, 5-

mm × 4-mm VQFN package, and is fully specified

from –40°C to +85°C, with a maximum operating

temperature range of –50°C to +125°C.