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參數資料
| 型號： | AD8601ART |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Precision CMOS Single Supply Rail-to-Rail Input/Output Wideband Operational Amplifiers |
| 中文描述： | OP-AMP, 2100 uV OFFSET-MAX, 8.2 MHz BAND WIDTH, PDSO5 |
| 封裝： | SOT-23, MO-178AA, 5 PIN |
| 文件頁數： | 13/16頁 |
| 文件大小： | 255K |
| 代理商： | AD8601ART |
AD8601/AD8602
–13–
REV. 0
SETTLING TIME
–
ns
5
5
O
–
3
0
1
3
4
2
1
0
1,000
200
400
600
800
0.1%
0.01%
0.01%
0.1%
2
4
V
S
= 5V
T
A
= 25 C
TPC 49. Output Swing vs. Settling Time
THEORY OF OPERATION
The AD8601/AD8602 family of ampli
fi
ers are rail-to-rail input and
output precision CMOS ampli
fi
ers speci
fi
ed from 2.7 V to 5.0 V of
power supply voltage. These ampli
fi
ers use Analog Devices
’
propri-
etary technology called DigiTrim
to achieve a higher degree of
precision than available from most CMOS ampli
fi
ers. DigiTrim
technology is a method of trimming the offset voltage of the
ampli
fi
er after it has already been assembled. The advantage in
post-package trimming lies in the fact that it corrects any offset
voltages due to the mechanical stresses of assembly. This tech-
nology is scalable and utilized with every package option, including
SOT23-5, providing lower offset voltages than previously achieved in
these small packages.
The DigiTrim process is done at the factory and does not add
additional pins to the ampli
fi
er. All AD860x ampli
fi
ers are avail-
able in standard op amp pinouts, making DigiTrim completely
transparent to the user. The AD860x can be used in any preci-
sion op amp application.
The input stage of the ampli
fi
er is a true rail-to-rail architecture,
allowing the input common-mode voltage range of the op amp to
extend to both positive and negative supply rails. The voltage swing
of the output stage is also rail-to-rail and is achieved by using an
NMOS and PMOS transistor pair connected in a common-source
con
fi
guration. The maximum output voltage swing is proportional
to the output current, and larger currents will limit how close the
output voltage can get to the supply rail. This is a characteristic of
all rail-to-rail output ampli
fi
ers. With 1 mA of output current, the
output voltage can reach within 20 mV of the positive rail and
15 mV of the negative rail.
The open-loop gain of the AD860x is 100 dB, typical, with a load
of 2 k
. Because of the rail-to-rail output con
fi
guration, the gain
of the output stage, and thus the open-loop gain of the ampli
fi
er,
is dependent on the load resistance. Open-loop gain will decrease
with smaller load resistances. Again, this is a characteristic inher-
ent to all rail-to-rail output ampli
fi
ers.
Rail-to-Rail Input Stage
The input common-mode voltage range of the AD860x extends
to both positive and negative supply voltages. This maximizes
the usable voltage range of the ampli
fi
er, an important feature
for single supply and low voltage applications. This rail-to-rail
input range is achieved by using two input differential pairs, one
NMOS and one PMOS, placed in parallel. The NMOS pair is
active at the upper end of the common-mode voltage range, and
the PMOS pair is active at the lower end of the common-mode
range.
The NMOS and PMOS input stage are separately trimmed using
DigiTrim to minimize the offset voltage in both differential pairs.
Both NMOS and PMOS input differential pairs are active in a
500 mV transition region, when the input common-mode voltage
is between approximately 1.5 V and 1 V below the positive supply
voltage. Input offset voltage will shift slightly in this transition
region, as shown in Figures 5 and 6. Common-mode rejection
ratio will also be slightly lower when the input common-mode
voltage is within this transition band. Compared to the Burr
Brown OPA2340 rail-to-rail input ampli
fi
er, shown in Figure 1,
the AD860x, shown in Figure 2, exhibits lower offset voltage shift
across the entire input common-mode range, including the transi-
tion region.
V
CM
–
V
0.7
0.4
1.40
5
1
V
O
–
2
3
4
0.2
0.5
0.8
1.1
0.1
Figure 1. Burr Brown OPA2340UR Input Offset Voltage
vs. Common-Mode Voltage, 24 SOIC Units @ 25
°
C
V
CM
–
V
0.7
0.4
1.40
5
1
V
O
–
2
3
4
0.2
0.5
0.8
1.1
0.1
Figure 2. AD8602AR Input Offset Voltage vs.
Common-Mode Voltage, 300 SOIC Units @ 25
°
C
DigiTrim is a trademark of Analog Devices.
相關PDF資料 |
PDF描述 |
|---|---|
| AD8601DRT | Precision CMOS Single Supply Rail-to-Rail Input/Output Wideband Operational Amplifiers |
| AD8602 | Precision CMOS Single Supply Rail-to-Rail Input/Output Wideband Operational Amplifiers |
| AD8602AR | Precision CMOS Single Supply Rail-to-Rail Input/Output Wideband Operational Amplifiers |
| AD8602ARM | Precision CMOS Single Supply Rail-to-Rail Input/Output Wideband Operational Amplifiers |
| AD8602DR | Precision CMOS Single Supply Rail-to-Rail Input/Output Wideband Operational Amplifiers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8601ART-R2 | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R I/O 5.5V 5-Pin SOT-23 T/R 制造商:Analog Devices 功能描述:IC OP-AMP SINGLE R/R |
| AD8601ART-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision CMOS Single-Supply Rail-to-Rail Input/Output Wideband Operational Amplifiers |
| AD8601ART-REEL7 | 功能描述:IC OPAMP GP CMOS 8.4MHZ SOT23-5 RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:DigiTrim® 標準包裝:2,500 系列:- 放大器類型:通用 電路數:1 輸出類型:滿擺幅 轉換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SO 包裝:帶卷 (TR) |
| AD8601ARTZ | 制造商:Analog Devices 功能描述:IC OP AMP R/R SINGLE SOT23-5 制造商:Analog Devices 功能描述:IC, OP AMP, R/R, SINGLE, SOT23-5 |
| AD8601ARTZ-R2 | 功能描述:IC OPAMP GP CMOS 8.4MHZ SOT23-5 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:DigiTrim® 標準包裝:2,500 系列:- 放大器類型:通用 電路數:1 輸出類型:滿擺幅 轉換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SO 包裝:帶卷 (TR) |
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