参数资料
| 型号： | INA149AIDR |
| 厂商： | Texas Instruments |
| 文件页数： | 8/26页 |
| 文件大小： | 0K |
| 描述： | IC AMP UNITY GAIN DIFF 8SOIC |
| 特色产品： | INA149 Difference Amplifier |
| 标准包装： | 1 |
| 放大器类型： | 差分 |
| 电路数： | 1 |
| 转换速率： | 5 V/µs |
| -3db带宽： | 500kHz |
| 电压 - 输入偏移： | 350µV |
| 电流 - 电源： | 810µA |
| 电流 - 输出 / 通道： | 25mA |
| 电压 - 电源，单路/双路(±)： | 4 V ~ 36 V，±2 V ~ 18 V |
| 工作温度： | -40°C ~ 125°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： | 标准包装 |
| 其它名称： | 296-30028-6 |
+
20 k
380 k
19 k
V
V+
4
7
2
3
1
6
5
+
VOUT = (+IN) – (–IN)
–IN
+IN
R1
R2
C2
C1
(1)
SBOS579B – SEPTEMBER 2011 – REVISED JULY 2012
NOISE PERFORMANCE
The wideband noise performane of the INA149 is dominated by the internal resistor network. The thermal or
Johnson noise of these resistors measures approximately 550 nV/
√Hz. The internal op amp contributes virtually
no excess noise at frequencies above 100 Hz.
Many applications may be satisfied with less than the full 500-kHz bandwidth of the INA149. In these cases, the
noise can be reduced with a low-pass filter on the output. The two-pole filter shown in Figure 47 limits bandwidth
and reduces noise. Because the INA149 has a 1/f noise corner frequency of approximately 100 Hz, a cutoff
frequency below 100 Hz does not further reduce noise.
Component values for different filter frequencies are shown in Table 1.
(1) For most applications, the OPA171 can be used as an operational amplifier. For directly driving successive-approximation register (SAR)
data converters, the OPA140 is a good choice.
Figure 47. Output Filter for Noise Reduction
Table 1. Components Values for Different Filter Bandwidths
BUTTERWORTH
OUTPUT NOISE
LOW-PASS (f–3 dB)
(mVPP)
R1
R2
C1
C2
200 kHz
1.8
No filter
100 kHz
1.1
11 k
Ω
11.3 k
Ω
100 pF
200 pF
10 kHz
0.35
11 k
Ω
11.3 k
Ω
1 nF
2 nF
1 kHz
0.11
11 k
Ω
11.3 k
Ω
10 nF
20 nF
100 Hz
0.05
11 k
Ω
11.3 k
Ω
0.1 F
0.2 F
16
Copyright 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): INA149
相关PDF资料 |
PDF描述 |
|---|---|
| 5-146851-1 | CONN HEADER VERT DUAL .100 TIN |
| 68685-411 | CONN RCPT 11POS .100" SNG ROW |
| 0713085690 | CONN SMD BKWY HDR TIN 90POS |
| 69154-204LF | CONN RCPT 8POS .100" DBL SMD |
| 929842-01-07-RB | CONN RCPT 14POS DL STR .1" GO |
相关代理商/技术参数 |
参数描述 |
|---|---|
| INA149AMDREP | 功能描述:差分放大器 EP High Common Mode Vltg Diff Amp RoHS:否 制造商:Texas Instruments 通道数量:1 Channel 带宽:2.4 GHz 可用增益调整:6 dB to 26 dB 输入补偿电压: 共模抑制比（最小值）:- 40 dB 工作电源电压:4.75 V to 5.25 V 电源电流:100 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:WQFN-24 封装:Reel |
| INA149-EP | 制造商:TI 制造商全称:Texas Instruments 功能描述:HIGH COMMON-MODE VOLTAGE DIFFERENCE AMPLIFIER |
| INA149EVM | 功能描述:放大器 IC 开发工具 INA149 Eval Mod RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| INA152 | 制造商:BB 制造商全称:BB 功能描述:Single-Supply DIFFERENCE AMPLIFIER |
| INA152EA | 制造商:Texas Instruments 功能描述:IC AMP DIFF SMD VSSOP8 152 |
发布紧急采购，3分钟左右您将得到回复。