Datasheet > MAX4207

MAX4207

更新时间： 2024-10-29 14:58:23

品牌	Logo	应用领域
亚德诺 - ADI		放大器
页数	文件大小	规格书
15页	386K
描述
高精度互阻对数放大器，动态范围大于105

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数据手册

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MAX4207 数据手册

19-3070; Rev 1; 6/04

Precision Transimpedance Logarithmic

Amplifier with Over 5 Decades of Dynamic Range

General Description

Features

The MAX4207 logarithmic amplifier computes the log

ratio of an input current relative to a reference current

(externally or internally generated) and provides a cor-

responding voltage output with a default -0.25V/decade

scale factor. The device operates from dual 2.7V to

5.5V supplies and is capaꢀle of measuring five

decades of input current across a 10nA to 1mA range.

♦ ±2.7V to ±5.5V Dual-Supply Operation

♦ 5 Decades of Dynamic Range (10nA to 1mA)

♦ Monotonic Over a 1nA to 1mA Range

♦ -0.25V/Decade Internally Trimmed Output Scale

Factor

The MAX4207’s uncommitted op amp can ꢀe used for

a variety of functions, including filtering noise, adding

offset, and adding additional gain. A 0.5V reference is

also included to generate an optional precision current

reference using an external resistor, which adjusts the

log intercept of the MAX4207. The output-offset voltage

and the adjustaꢀle scale factor are also set using exter-

nal resistors.

♦ Adjustable Output Scale Factor

♦ Adjustable Output Offset Voltage

♦ Internal 10nA to 10µA Reference Current Source

♦ Input Amplifiers Summing Nodes at Ground

♦ Small 16-Pin Thin QFN Package (4mm x 4mm x

0.8mm)

The MAX4207 is availaꢀle in a space-saving 16-pin thin

QFN package (4mm x 4mm x 0.8mm), and is specified

for operation over the -40°C to +85°C extended temper-

ature range.

♦ -40°C to +85°C Operating Temperature Range

♦ Evaluation Kit Available (Order MAX4206EVKIT)

Applications

Ordering Information

Photodiode Current Monitoring

Portaꢀle Instrumentation

Medical Instrumentation

Analog Signal Processing

PART

TEMP RANGE

PIN-PACKAGE

MAX4207ETE

-40°C to +85°C

16 Thin QFN-EP*

*EP = Exposed paddle.

Typical Operating Circuit

Pin Configuration

0.1µF

OUT

LOGV2

SCALE

TOP VIEW

(LEADS ON BOTTOM)

LOGIIN

COMP

REFIOUT

REFIIN

COMP

16 15 14 13

COMP

MAX4207

LOGV1

N.C.

REFVOUT

GND

COMP

12 CMVOUT

11 REFISET

MAX4207

CMVIN

REFVOUT

N.C.

CMVOUT

REFISET

OSADJ

GND

SET

0.1µF

THIN QFN

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...15

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与MAX4207相关器件

型号	品牌	获取价格	描述	数据表
MAX4207ESA	MAXIM	获取价格	Buffer Amplifier, 1 Func, PDSO8, SO-8
MAX4207ETE	MAXIM	获取价格	Precision Transimpedance Logarithmic Amplifier with Over 5 Decades of Dynamic Range
MAX4207ETE+	MAXIM	获取价格	Log Or Antilog Amplifier, 1 Func, BICMOS, 4 X 4 MM, 0.8 MM HEIGHT, MO-220-WGGC, TQFN-16
MAX4207ETE+T	MAXIM	获取价格	Log Or Antilog Amplifier, 1 Func, BICMOS, 4 X 4 MM, 0.8 MM HEIGHT, MO-220-WGGC, TQFN-16
MAX4207ETE-T	MAXIM	获取价格	Log Or Antilog Amplifier, 1 Func, BICMOS, 4 X 4 MM, 0.8 MM HEIGHT, MO-220-WGGC, TQFN-16
MAX4207EUK-T	MAXIM	获取价格	暂无描述
MAX4208	MAXIM	获取价格	Ultra-Low Offset/Drift, Precision Instrumentation Amplifiers with REF Buffer
MAX4208	ADI	获取价格	超低失调/漂移、高精度仪表放大器，提供REF缓冲器
MAX4208_09	MAXIM	获取价格	Ultra-Low Offset/Drift, Precision Instrumentation Amplifiers with REF Buffer
MAX4208AUA+	MAXIM	获取价格	Buffer Amplifier, 1 Func, BICMOS, PDSO8,

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