参数资料
| 型号： | LT1128ACN8 |
| 厂商： | Linear Technology |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | IC OP-AMP LOW NOISE SNGL 8-DIP |
| 标准包装： | 50 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 转换速率： | 6 V/µs |
| 增益带宽积： | 20MHz |
| 电流 - 输入偏压： | 25nA |
| 电压 - 输入偏移： | 10µV |
| 电流 - 电源： | 7.4mA |
| 电压 - 电源，单路/双路(±)： | ±4 V ~ 18 V |
| 工作温度： | -40°C ~ 85°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 |
第1页第2页第3页当前第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
LT1028/LT1128
12
1028fb
applicaTions inForMaTion – noise
Noise Testing – Voltage Noise
The LT1028/LT1128’s RMS voltage noise density can be
accurately measured using the Quan Tech Noise Analyzer,
Model 5173 or an equivalent noise tester. Care should be
taken, however, to subtract the noise of the source resistor
used. Prefabricated test cards for the Model 5173 set the
device under test in a closed-loop gain of 31 with a 60Ω
source resistor and a 1.8k feedback resistor. The noise
of this resistor combination is 0.13√58 = 1.0nV/√Hz. An
LT1028/LT1128 with 0.85nV/√Hz noise will read (0.852 +
1.02)1/2 = 1.31nV/√Hz. For better resolution, the resistors
should be replaced with a 10Ω source and 300Ω feedback
resistor. Even a 10Ω resistor will show an apparent noise
which is 8% to 10% too high.
The 0.1Hz to 10Hz peak-to-peak noise of the LT1028/
LT1128 is measured in the test circuit shown. The fre-
quency response of this noise tester indicates that the
0.1Hz corner is defined by only one zero. The test time
to measure 0.1Hz to 10Hz noise should not exceed 10
seconds, as this time limit acts as an additional zero to
eliminate noise contributions from the frequency band
below 0.1Hz.
Measuring the typical 35nV peak-to-peak noise per-
formance of the LT1028/LT1128 requires special test
precautions:
(a) The device should be warmed up for at least five
minutes. As the op amp warms up, its offset voltage
changes typically 10V due to its chip temperature
increasing 30°C to 40°C from the moment the power
supplies are turned on. In the 10 second measurement
interval these temperature-induced effects can easily
exceed tens of nanovolts.
(b) For similar reasons, the device must be well shielded
from air current to eliminate the possibility of ther-
moelectric effects in excess of a few nanovolts, which
would invalidate the measurements.
(c) Sudden motion in the vicinity of the device can also
feedthrough to increase the observed noise.
Anoise-voltagedensitytestisrecommendedwhenmeasur-
ing noise on a large number of units. A 10Hz noise-voltage
density measurement will correlate well with a 0.1Hz to
10Hz peak-to-peak noise reading since both results are
determined by the white noise and the location of the 1/f
corner frequency.
Figure 2. 0.1Hz to 10Hz Noise Test Circuit
Figure 3. 0.1Hz to 10Hz Peak-to-Peak
Noise Tester Frequency Response
–
+
VOLTAGE GAIN = 50,000
* DEVICE UNDER TEST
NOTE ALL CAPACITOR VALUES ARE FOR
NONPOLARIZED CAPACITORS ONLY
100k
10
–
+
2k
4.7F
0.1F
100k
24.3k
22F
2.2F
4.3k
110k
SCOPE
× 1
RIN = 1M
0.1F
*
1028 F02
LT1001
FREQUENCY (Hz)
40
GAIN
(dB)
60
70
90
100
0.01
1.0
10
100
1028 F03
30
0.1
50
80
相关PDF资料 |
PDF描述 |
|---|---|
| ADA4927-2YCPZ-RL | IC OPAMP CF DIFF DUAL LN 24LFCSP |
| ADA4927-2YCPZ-R7 | IC OPAMP CF DIFF DUAL LN 24LFCSP |
| 76382-414LF | CONN HEADER 14POS .100" R/A TIN |
| 170823-8 | CONN INSULATION SLEEVE .110 |
| 735075-1 | CONN RCPT HSG .250 1POS RED |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1128ACN8#PBF | 功能描述:IC OP-AMP LOW NOISE SNGL 8-DIP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°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-SOIC 包装:带卷 (TR) |
| LT1128AM | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultra Low Noise Precision High Speed Op Amps |
| LT1128AMJ8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultra Low Noise Precision High Speed Op Amps |
| LT1128C | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultra Low Noise Precision High Speed Op Amps |
| LT1128CJ8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultra Low Noise Precision High Speed Op Amps |
发布紧急采购，3分钟左右您将得到回复。