công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
ADS1130IPW bảng dữ liệu(PDF) 5 Page - Texas Instruments |
|
|
ADS1130IPW bảng dữ liệu(HTML) 5 Page - Texas Instruments |
5 / 17 page Z EFF + 1 2f MODCBUF R INT R INT R F1 R 1 R F2 ADC A3 Gain=1 CAP AINP CAP A2 A1 450W 18pF AINN 450W 18pF ADS1130 www.ti.com SBAS458A – JUNE 2009 – REVISED SEPTEMBER 2012 OVERVIEW The ADS1130 is a precision, 18-bit ADC that includes a low-noise amplifier, internal oscillator, third-order delta-sigma ( ΔΣ) modulator, and fourth-order digital filter. The ADS1130 provides a complete front-end solution for bridge sensor applications such as weigh scales, strain gauges, and pressure sensors. Data can be output at 10SPS for excellent 50Hz and 60Hz rejection, or at 80SPS when higher speeds are needed. The ADS1130 is easy to configure, and all digital control is accomplished through dedicated pins; there are no registers to program. A simple two- wire serial interface retrieves the data. ANALOG INPUTS (AINP, AINN) The input signal to be measured is applied to the input pins AINP and AINN. The ADS1130 accepts Figure 1. Simplified Diagram of the Amplifier differential input signals, but can also measure unipolar signals. Bypass Capacitor LOW-NOISE AMPLIFIER Place a 0.1 μF external capacitor between the two capacitor pins (CAP). A high-quality capacitor is The ADS1130 features a low-drift, low-noise amplifier recommended for best performance. that provides a complete front-end solution for bridge sensors. A simplified diagram is shown in Figure 1. It VOLTAGE REFERENCE INPUTS consists of two chopper-stabilized amplifiers (A1 and (REFP, REFN) A2) and three accurately-matched resistors (R1, RF1, and RF2), which construct a differential front-end The voltage reference used by the modulator is stage with a gain of 64, followed by gain stage A3 generated from the voltage difference between REFP (Gain = 1). The inputs are equipped with an and REFN: VREF = REFP – REFN. The reference electromagnetic interference (EMI) filter, as shown in inputs use a structure similar to that of the analog Figure 1. The cutoff frequency of the EMI filter is inputs. In order to increase the reference input 19.6MHz. With a 5V reference, the bipolar input impedance, a switching buffer circuitry is used to range is –39mV to +39mV. The inputs of the reduce the input equivalent capacitance. The ADS1130 are protected with internal ESD diodes reference drift and noise impact ADC performance. In connected to the power-supply rails. order to achieve best results, pay close attention to the reference noise and drift specifications. A simplified diagram of the circuitry on the reference inputs is illustrated in Figure 2. The switches and capacitors can be modeled approximately using an effective impedance of: Where: fMOD = modulator sampling frequency (76.8kHz) CBUF = input capacitance of the buffer Copyright © 2009–2012, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: ADS1130 |
Số phần tương tự - ADS1130IPW |
|
Mô tả tương tự - ADS1130IPW |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |