參數(shù)資料
型號: MAX9920ASA+T
廠商: Maxim Integrated Products
文件頁數(shù): 6/18頁
文件大小: 0K
描述: IC AMP CURRENT SENSE 8SOIC
標(biāo)準(zhǔn)包裝: 2,500
放大器類型: 電流檢測
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 1.5 V/µs
-3db帶寬: 230kHz
電流 - 輸入偏壓: 175µA
電壓 - 輸入偏移: 480µV
電流 - 電源: 1mA
電流 - 輸出 / 通道: 44mA
電壓 - 電源,單路/雙路(±): 4.5 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: *
封裝/外殼: *
供應(yīng)商設(shè)備封裝: *
包裝: *
MAX9918/MAX9919/MAX9920
-20V to +75V Input Range, Precision
Uni-/Bidirectional, Current-Sense Amplifiers
14
Maxim Integrated
Uni-/Bidirectional Operation
The MAX9918/MAX9919/MAX9920 support both unidi-
rectional and bidirectional operation. The devices oper-
ate in unidirectional mode with VREFIN = VGND. The
output is then referenced to ground and the output volt-
age VOUT is proportional to the positive voltage drop
(VSENSE) from RS+ to RS- (Figure 1).
The MAX9918/MAX9919 operate in bidirectional mode
by application of a low-source impedance reference
voltage in the 0V to VCC - 1.9V range, (typically VCC/2),
to REFIN. For the MAX9920, the reference voltage range
is 0V to VCC - 2.4V (typically VCC/2). The output voltage
VOUT relative to VREFIN is then proportional to the
±VSENSE voltage drop from RS+ to RS- (Figure 2).
IDISCHARGE
RSENSE
LOAD
TO ADC
VCC
GND
RS+
RS-
REFIN
OUT
40mV
10mV
30mV
20mV
0
DISCHARGE
CURRENT
0.9V
3.6V
2.7V
G = 90V/V
5V
1.8V
SHDN
MAX9919N
VSENSE
VOUT
Figure 1. Unidirectional Operation
IDISCHARGE
RSENSE
ICHARGE
LOAD
TO ADC
2.5V
VCC
GND
RS+
RS-
REFIN
OUT
-20mV
10mV
20mV
0
DISCHARGE
CURRENT
CHARGE
CURRENT
-1.8V
1.8V
0.9V
G = 90V/V
VSENSE
5V
-0.9V
-10mV
SHDN
VOUT - VREFIN
MAX9919N
Figure 2. Bidirectional Operation
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