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参数资料
| 型号： | LT1793IS8 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | Low Noise, Picoampere Bias Current, JFET Input Op Amp |
| 中文描述： | OP-AMP, 4800 uV OFFSET-MAX, 3.1 MHz BAND WIDTH, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件页数： | 7/12页 |
| 文件大小： | 162K |
| 代理商： | LT1793IS8 |
7
LT1793
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
Short-Circuit Output Current
vs Temperature
TEMPERATURE (
°
C)
–75
10
O
15
20
25
30
–25
50
25
100
1793 G19
35
40
–50
0
75
125
SINK
SOURCE
V
S
=
±
15V
Supply Current vs Temperature
TEMPERATURE (
°
C)
–75
3
S
4
–25
50
25
100
1793 G20
5
–50
0
75
125
V
S
=
±
15V
V
S
=
±
5V
U
S
A
LT1793 vs the Competition
With improved noise performance, the LT1793 in the
PDIP directly replaces such JFET op amps as the OPA111
and the AD645. The combination of low current and
voltage noise of the LT1793 allows it to surpass most dual
and single JFET op amps. The LT1793 can replace many
of the lowest noise bipolar amps that are used in amplify-
ing low level signals from high impedance transducers.
The best bipolar op amps (with higher current noise) will
eventually lose out to the LT1793 when transducer im-
pedance increases.
O
PPLICATI
U
U
Figure 1. Comparison of LT1793, OP215, and AD822
Input Bias Current vs Common Mode Range
COMMON MODE RANGE (V)
–15
–100
I
–60
–40
–20
0
20
40
–10
–5
0
5
1793 F01
10
60
80
100
–80
15
LT1793
AD822
CURRENT NOISE =
√
2qI
B
OP215
TEMPERATURE (
°
C)
0
I
300p
100p
3n
1n
30n
10n
100
1793 G21
30p
10p
3p
1p
0.3p
25
50
75
125
V
S
=
±
15V
V
CM
= –10 TO 13V
BIAS
CURRENT
OFFSET
CURRENT
Input Bias and Offset Currents
vs Chip Temperature
The extremely high input impedance (10
13
) assures that
the input bias current is almost constant over the entire
common mode range. Figure 1 shows how the LT1793
stands up to the competition. Unlike the competition, as the
input voltage is swept across the entire common mode
range the input bias current of the LT1793 hardly changes.
As a result the current noise does not degrade. This makes
the LT1793 the best choice in applications where an
amplifier has to buffer signals from a high impedance
transducer.
Offset nulling will be compatible with these devices with the
wiper of the potentiometer tied to the negative supply
(Figure 2a). No appreciable change in offset voltage drift
2
3
1
5
V
OS
=
±
13mV
50k
15V
–15V
4
6
7
–
+
2
3
1
5
V
OS
=
±
1.3mV
50k
10k
10k
15V
–15V
(b)
(a)
1793 F02
4
6
7
–
+
Figure 2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1793IS8#PBF | 功能描述:IC OPAMP PREC JFET LOWNOIS 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:100 系列:- 放大器类型:通用 电路数:1 输出类型:- 转换速率:0.2 V/µs 增益带宽积:- -3db带宽:- 电流 - 输入偏压:100pA 电压 - 输入偏移:30µV 电流 - 电源:380µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):±2 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SO 包装:管件 |
| LT1793IS8#TR | 功能描述:IC OPAMP PREC JFET LONOISE 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:3.5 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:30pA 电压 - 输入偏移:2000µV 电流 - 电源:200µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| LT1793IS8#TRPBF | 功能描述:IC OPAMP PREC JFET LOWNOIS 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:3.5 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:30pA 电压 - 输入偏移:2000µV 电流 - 电源:200µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| LT1794 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 500mA, 200MHz xDSL Line Driver Amplifier |
| LT1794CFE | 功能描述:IC AMP XDSL LINE DRIVER 20TSSOP RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
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