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參數(shù)資料
| 型號(hào)： | ISL55291IUZ-T13 |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 7/18頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP LP DUAL ULT LN 10-MSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | 電壓反饋 |
| 電路數(shù)： | 2 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 260 V/µs |
| 增益帶寬積： | 800MHz |
| 電流 - 輸入偏壓： | 12µA |
| 電壓 - 輸入偏移： | 170µV |
| 電流 - 電源： | 12mA |
| 電流 - 輸出 / 通道： | 132mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 5 V，±1.5 V ~ 2.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 10-MSOP |
| 包裝： | 帶卷 (TR) |
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15
FN6263.1
March 30, 2007
Current Sense Application Circuit
The schematic in Figure 44 provides an example of utilizing
the ISL55191 high speed performance with the ground
sensing input capability to implement a single-supply, G = 10
differential low side current sense amplifier. The reference
voltage applied to VREF (+2.5V) defines the amplifier output
0A current sense reference voltage at one half the supply
voltage level (VS = +5VDC), and RSENSE sets the current
sense gain and full scale values. In this example the current
gain is 10A/V over a maximum current range of slightly less
than ±25A with RSENSE = 0.01Ω. The amplifier VIO error
(800V max) and input bias offset current IIO error (0.7A)
together contribute less than 10mV (100mA) at the output for
better than 0.2% full scale accuracy.
The amplifier’s high slew rate and fast pulse response make
this circuit suitable for low-side current sensing in PMWM
and motor control applications. The excellent input overload
recovery response enables the circuit to maintain
performance in the presence of parasitic inductance that
cause fast rise and falling edge spikes that can momentarily
overload the input stage of the amplifier.
RSENSE
0.01
Ω
RF
10k
Ω
IN-
IN+
ISL55191
RL
RT
OUT
V-
V+
FEEDBACK
+5VDC
PARASITIC
L TO R
VOUT
CURRENT
INPUT
CURRENT
INPUT
RG+
100
Ω
RG-
100
RREF
10k
Ω
FIGURE 44. GROUND SIDE CURRENT SENSE AMPLIFIER
VREF
+2.5V
ISL55191, ISL55291
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