LOG200
- Ultra-fast transient response to low current levels:
- Settling time for 10‑nA to 100‑nA step: 220‑ns rising, 630‑ns falling (typ)
- Settling time for 100‑nA to 1‑µA step: 80‑ns rising, 240‑ns falling (typ)
- Wide dynamic current range: 100 pA to 10 mA (160 dB)
- High signal bandwidth:
- 6 MHz at 1 µA to 10 mA
- 120 kHz at 1 nA
- High-accuracy transfer function:
- 0.2 % max log conformity error
- Integrated reference current (1 µA) and reference voltages (2.5 V and 1.65 V) for accurate ratio calculation
- Low reference drift: 20 ppm/°C (typ)
- Additional auxiliary high-speed op amp for differential ADC drive, single-ended gain or filter blocks, and other peripheral functions
- Single supply (4.5 V to 12.6 V) or dual supply (±2.25 V to ±6.3 V) operation
- Low quiescent current: 9.5 mA
- Specified temperature range: –40°C to +125°C
- Small package: 3 mm × 3 mm VQFN
The LOG200 is a wide-dynamic-range current-to-voltage amplifier specifically designed to optimize current measurements across 160 dB of dynamic range with unparalleled accuracy and speed for optical communications, medical diagnostics, and industrial process control measurements. The LOG200 features two logarithmic amplifiers followed by a high-accuracy differential amplifier that convert current signals into a voltage representing the log-compressed ratio of the two currents. The current inputs are designed to feature a high-speed response from one input, and a highly accurate reference signal on the other input, allowing for a unique combination of fast transient response and high logarithmic conformity.
The LOG200 ratio is internally set to 250 mV/decade of current-to-voltage conversion. The device integrates an uncommitted high-speed amplifier to allow the output to be configured for differential or filtered responses, with a fast settling time to drive successive approximation analog-to-digital converters (SAR ADCs). The LOG200 also features a separate reference current and reference voltage designed to configure the device for optimized input current and common-mode voltages.
The LOG200 can be powered in a single-supply (4.5 V to 12.6 V) or dual-supply (±2.25 V to ±6.3 V) configuration and is specified from –40°C to +125°C.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | LOG200 Precision, High-Speed Logarithmic Amplifier With Integrated Photodiode Bias datasheet | PDF | HTML | 2023年 8月 14日 |
EVM User's guide | LOG200 Evaluation Module User's Guide (Rev. A) | PDF | HTML | 2024年 1月 22日 | |
Certificate | LOG200EVM EU Declaration of Conformity (DoC) | 2023年 6月 30日 |
設計與開發
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LOG200EVM — LOG200 evaluation module for high-speed precision logarithmic amplifier with photodiode bias
The LOG200 evaluation module (EVM) is a development platform for evaluating the LOG200, which is a precision, high-speed logarithmic amplifier with integrated photodiode bias and dark-current correction. LOG200 is optimized for current measurements across 160 dB of dynamic range with unparalleled (...)
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TINA-TI — 基於 SPICE 的類比模擬程式
封裝 | 引腳 | 下載 |
---|---|---|
VQFN (RGT) | 16 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點