参数资料
| 型号： | LT1993CUD-2#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | IC DIFF AMP/ADC DRVR 16-QFN |
| 标准包装： | 2,500 |
| 放大器类型： | 差分 |
| 电路数： | 2 |
| 输出类型： | 差分 |
| 转换速率： | 1100 V/µs |
| -3db带宽： | 800MHz |
| 电流 - 输入偏压： | 5µA |
| 电压 - 输入偏移： | 1000µV |
| 电流 - 电源： | 100mA |
| 电流 - 输出 / 通道： | 45mA |
| 电压 - 电源，单路/双路(±)： | 4 V ~ 5.5 V，±2 V ~ 2.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN-EP（3x3） |
| 包装： | 带卷 (TR) |
LT1993-2
16
19932fa
APPLICATIO S I FOR ATIO
WU
U
that look like a series 25
Ω resistor with a 36pF capacitor
shunting each ltered output to AC ground, giving a –3dB
bandwidth of 175MHz.
it will appear at each ltered output as a single-ended
capacitance of twice the value. To halve the lter band-
width, for example, two 36pF capacitors could be added
(one from each ltered output to ground). Alternatively
one 18pF capacitor could be added between the ltered
outputs, again halving the lter bandwidth. Combinations
of capacitors could be used as well; a three capacitor
solution of 12pF from each ltered output to ground plus
a 12pF capacitor between the ltered outputs would also
halve the lter bandwidth (Figure 8).
The lter cutoff frequency is easily modied with just a
few external components. To increase the cutoff frequency,
simply add 2 equal value resistors, one between +OUT and
+OUTFILTERED and the other between –OUT and –OUTFIL-
TERED (Figure 7). These resistors are in parallel with the
internal 25
Ω resistor, lowering the overall resistance and
increasing lter bandwidth. To double the lter bandwidth,
for example, add two external 25
Ω resistors to lower
the series resistance to 12.5
Ω. The 36pF of capacitance
remains unchanged, so lter bandwidth doubles.
Figure 6. LT1993-2 Internal Filter Topology –3dB BW ≈175MHz
Figure 7. LT1993-2 Internal Filter Topology Modied for
2x Filter Bandwidth (2 External Resistors)
Bandpass ltering is also easily implemented with just a
few external components. An additional 120pF and 39nH,
each added differentially between +OUTFILTERED and
–OUTFILTERED creates a bandpass lter with a 71MHz
center frequency, –3dB points of 55MHz and 87MHz, and
1.6dB of insertion loss (Figure 9).
Figure 8. LT1993-2 Internal Filter Topology Modied for
1/2x Filter Bandwidth (3 External Capacitors)
19932 F06
25
VEE
12pF
LT1993-2
–OUT
+OUT
25
12pF
–OUTFILTERED
+OUTFILTERED
8
7
6
5
FILTERED OUTPUT
(175MHz)
VEE
19932 F07
25
25
12pF
LT1993-2
–OUT
+OUT
25
25
12pF
–OUTFILTERED
FILTERED OUTPUT
(350MHz)
+OUTFILTERED
8
7
6
5
To decrease lter bandwidth, add two external capacitors,
one from +OUTFILTERED to ground, and the other from
–OUTFILTERED to ground. A single differential capacitor
connected between +OUTFILTERED and –OUTFILTERED
can also be used, but since it is being driven differentially
VEE
19932 F08
25
12pF
LT1993-2
–OUT
+OUT
25
12pF
–OUTFILTERED
+OUTFILTERED
8
7
6
5
FILTERED OUTPUT
(87.5MHz)
Figure 9. LT1993-2 Output Filter Topology Modied for Bandpass
Filtering (1 External Inductor, 1 External Capacitor)
VEE
19932 F09
25
12pF
LT1993-2
–OUT
+OUT
25
12pF
120pF
39nH
–OUTFILTERED
+OUTFILTERED
8
7
6
5
FILTERED OUTPUT
(71MHz BANDPASS,
–3dB @ 55MHz/87MHz)
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| LT1993CUD-4 | 制造商:Linear Technology 功能描述:DIFF-AMPLIFIER, 900MHZ, 1.1KV/US, QFN-16, No. of Amplifiers:2, Input Offset Voltage:1mV, Gain dB Max:12.4dB, Bandwidth:900MHz, Amplifier Case Style:QFN, No. of Pins:16, Supply Voltage Range:4V to 5.5V, Slew Rate:1.1kV/s, MSL:- |
| LT1993CUD-4#PBF | 功能描述:IC DIFF AMP/ADC DRVR 16-QFN RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| LT1993CUD-4#TR | 制造商:Linear Technology 功能描述:DIFF-AMPLIFIER, 900MHZ, 1.1KV/US, QFN-16, No. of Amplifiers:2, Input Offset Voltage:1mV, Gain dB Max:12.4dB, Bandwidth:900MHz, Amplifier Case Style:QFN, No. of Pins:16, Supply Voltage Range:4V to 5.5V, Slew Rate:1.1kV/s, MSL:- |
| LT1993CUD-4#TRPBF | 功能描述:IC DIFF AMP/ADC DRVR 16-QFN RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 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-SO 包装:带卷 (TR) |
| LT1993IUD-10 | 制造商:LINER 制造商全称:Linear Technology 功能描述:700MHz Low Distortion, Low Noise Differential Amplifi er/ADC Driver (AV = 10V/V) |
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