HJ390 high temperature low power quartz sensor pressure and temperature measurement circuit
隐藏域元素占位
- Product Description
-
- Commodity name: HJ390 high temperature low power quartz sensor pressure and temperature measurement circuit
- Commodity ID: 1311258125667028992
- 型号: HJ390
- 产品概述: HJ390 is a high-temperature, low-voltage, low-power quartz sensor pressure and temperature measurement circuit.
- 关键参数: Output signal difference frequency range: 10kHz to 150kHz
- 工作电流 （IQ）: 5mA
- 电源电压范围(VDD/V): +3.6V
- 工作温度(TA/℃): -55~200
- 封装 （Package）: UP3514
HJ390 is a high-temperature, low-voltage, low-power quartz sensor pressure and temperature measurement circuit. The circuit is based on the inherent precision pressure-frequency and temperature-frequency conversion characteristics of quartz crystals, consisting of two sets of independent pressure and temperature sensor measurement circuits that provide differential frequency signals convenient for counting processing. The circuit contains 4 crystal oscillators (where the pressure crystal operates in the third harmonic mode, while the other three crystals—pressure reference, temperature reference, and temperature crystal—operate in the fundamental frequency mode), 2 mixers, two low-pass filters, 2 differential output buffers, 1 pressure reference frequency output buffer, 1 common precision low-voltage differential reference source, as well as input voltage reverse protection circuits and other active and passive components. It employs a circuit design suitable for high-temperature operation, selected chip components, and high-temperature hybrid integration technology, making it widely applicable for pressure and temperature measurements in oil and natural gas operations on land or underwater.
Product features include:
3.6V battery powered
Total current (Typ) ≤5mA
Difference frequency output range 10~100kHz
Output signal duty cycle 45%~55%
Output signal phase jitter ≤250ns
Operating temperature -55~+200℃
Output signal level low level <0.3V; high level ≥2.8 V
Key words:- 长线
- 输出
- 信号
- 55
- 范围
- 45
- 电流
- 主要特点
- 电池
- 高电平