LOG200

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具有光电二极管偏置和暗电流校正功能的高速精密对数放大器

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数据表

document-pdfAcrobat LOG200 Precision, High-Speed Logarithmic Amplifier With Integrated Photodiode Bias 数据表 (Rev. B) (英语) PDF | HTML

LOG200

正在供货

数据表

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产品详情

Input current range (min) (nA)

0.1

Input current range (max) (mA)

10

Offset voltage (input amplifiers) (max) (mV)

2

Vs (±) (min) (V)

4.5

Vs (±) (max) (V)

12.6

Iq (max) (mA)

9

Dynamic range (typ) (dB)

160

Reference type

Int

Auxiliary op amps

1

Full-scale output voltage (min) (±V)

4.8

Full-scale output voltage (max) (±V)

12.3

Conformity error (initial 5 decades) (max) (%)

1.5

Conformity error (initial 5 decades) (typ. over temp) (%/°C)

0.2

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Input current range (min) (nA)

0.1

Input current range (max) (mA)

10

Offset voltage (input amplifiers) (max) (mV)

2

Vs (±) (min) (V)

4.5

Vs (±) (max) (V)

12.6

Iq (max) (mA)

9

Dynamic range (typ) (dB)

160

Reference type

Int

Auxiliary op amps

1

Full-scale output voltage (min) (±V)

4.8

Full-scale output voltage (max) (±V)

12.3

Conformity error (initial 5 decades) (max) (%)

1.5

Conformity error (initial 5 decades) (typ. over temp) (%/°C)

0.2

Operating temperature range (°C)

-40 to 125

Rating

Catalog

VQFN (RGT)

16

9 mm² (3 mm × 3 mm)

Ultra-fast transient response to low current levels:
- Settling time for 10nA to 100nA step: 240ns rising, 620ns falling (typ)
- Settling time for 100nA to 1µA step: 60ns rising, 150ns falling (typ)
Wide dynamic range: 10pA to 10mA (180dB)
- Specified from 100pA to 10mA (160dB)
High signal bandwidth:
- 20MHz at 10µA to 10mA
- 6.3MHz at 1µA
- 90kHz at 1nA
High-accuracy transfer function:
- 0.2% max log conformity error (10nA to 100µA)
Integrated reference current (1µA) and reference voltages (2.5V and 1.65V)
Additional auxiliary high-speed op amp for differential ADC drive, single-ended gain or filter blocks, and other peripheral functions
Single supply (4.5V to 12.6V) or dual supply (±2.25V to ±6.3V) operation
Specified temperature range: –40°C to +125°C
Small package options:
- 3mm × 3mm VQFN
- 1.6mm × 1.6mm DSBGA

Ultra-fast transient response to low current levels:
- Settling time for 10nA to 100nA step: 240ns rising, 620ns falling (typ)
- Settling time for 100nA to 1µA step: 60ns rising, 150ns falling (typ)
Wide dynamic range: 10pA to 10mA (180dB)
- Specified from 100pA to 10mA (160dB)
High signal bandwidth:
- 20MHz at 10µA to 10mA
- 6.3MHz at 1µA
- 90kHz at 1nA
High-accuracy transfer function:
- 0.2% max log conformity error (10nA to 100µA)
Integrated reference current (1µA) and reference voltages (2.5V and 1.65V)
Additional auxiliary high-speed op amp for differential ADC drive, single-ended gain or filter blocks, and other peripheral functions
Single supply (4.5V to 12.6V) or dual supply (±2.25V to ±6.3V) operation
Specified temperature range: –40°C to +125°C
Small package options:
- 3mm × 3mm VQFN
- 1.6mm × 1.6mm DSBGA

The LOG200 is a wide-dynamic-range current-to-voltage amplifier specifically designed to optimize current measurements across 160dB 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 250mV/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 (4.5V to 12.6V) or dual-supply (±2.25V to ±6.3V) configuration and is specified from –40°C to +125°C.

The LOG200 is a wide-dynamic-range current-to-voltage amplifier specifically designed to optimize current measurements across 160dB 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 250mV/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 (4.5V to 12.6V) or dual-supply (±2.25V to ±6.3V) configuration and is specified from –40°C to +125°C.

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顶层文档	类型	标题	格式选项	下载最新的英语版本		日期
*	数据表	LOG200 Precision, High-Speed Logarithmic Amplifier With Integrated Photodiode Bias 数据表 (Rev. B)	PDF \| HTML			2026-8-6
	应用手册	使用 LOG200 对数放大器执行精确的光学电流传感测量	PDF \| HTML	英语版	PDF \| HTML	2025-1-29
	证书	LOG200EVM EU Declaration of Conformity (DoC)				2023-6-30