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| 型号： | LTC6247CTS8#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/24页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP RRIO 180MHZ DL TSOT23-8 |
| 标准包装： | 500 |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 90 V/µs |
| 增益带宽积： | 180MHz |
| -3db带宽： | 120MHz |
| 电流 - 输入偏压： | 400nA |
| 电压 - 输入偏移： | 100µV |
| 电流 - 电源： | 1.25mA |
| 电流 - 输出 / 通道： | 100mA |
| 电压 - 电源，单路/双路(±)： | 2.5 V ~ 5.25 V，±1.25 V ~ 2.625 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 薄型，TSOT-23-8 |
| 供应商设备封装： | TSOT-23-8 |
| 包装： | 带卷 (TR) |
LTC6246/LTC6247/LTC6248
624678fa
Figure 3. Single Supply 12-Bit ADC Driver
Typical applicaTions
12-Bit ADC Driver
Figure3showstheLTC6246drivinganLTC236612-bitA/D
converter. The low wideband noise of the LTC6246 main-
tains a 70dB SNR even without the use of an intermediate
antialiasing RC filter. On a single 3.3V supply with a 2.5V
reference, a full –1dBFS output can be obtained without
the amplifier transitioning between input regions, thus
minimizing crossover distortion. Figure 4 shows an FFT
obtained with a sampling rate of 2.2Msps and a 350kHz
input waveform. Spurious free dynamic range is a quite
handsome 82dB.
LTC6246
+
–
624678 F03
LTC2366
VREF
GND
VDD
3.3V 2.5V
CS
SDO
SCK
OVDD
3.3V
VIN
AIN
499
1%
499
1%
10pF
Figure 4. 350kHz FFT Showing 82dB SFDR
FREQUENCY (kHz)
0
MAGNITUDE
(dB)
0
–10
–30
–50
–70
–20
–40
–60
–80
–90
–100
–110
400
800
200
600
624678 F04
1000
fIN = 350.195kHz
fSAMP = 2.2Msps
SFDR = 82dB
SNR = 70dB
1024 POINT FFT
C3
0.1F
LTC6246
–
+
624678 F05
3V
LT6003
–
+
3V
VOUT = VR + IPD 1M
–3dB BW = 700kHz
ICC = 2.2mA
OUTPUT NOISE = 160VRMS MEASURED ON A 1MHz BW
VOUT IS REFERRED TO VR
AT ZERO PHOTOCURRENT, VOUT = VR
VR
R1
1M, 1%
R3
1k
R2
1k
C2
6.8nF
FILM
OR NPO
Q1
NXP
BF862
PD1
OSRAM
SFH213
IPD
R5
20k
R4
10k
R6
10M
C1
0.1pF
R7
1k
C4
1F
Low Noise Low Power DC-Accurate Single Supply
Photodiode Amplifier
Figure 5 shows the LTC6246 applied as a low power high
performance transimpedance amplifier for a photodiode.
A low noise JFET Q1 acts as a current buffer, with R2 and
R3 imposing a low frequency gain of approximately 1.
Transimpedance gain is set by feedback resistor R1 to
1MΩ. R4 and R5 set the LTC6246 inputs at 1V below
the 3V rail, with C3 reducing their noise contribution.
By feedback this 1V also appears across R2, setting the
JFET quiescent current at 1mA completely independent
of its pinchoff voltage and IDSS characteristics. It does
this by placing the JFETs 1mA VGS at the gate referenced
to the source, which is sitting 1V above ground. For this
JFET, that will typically be about 500mV, and this voltage
is imposed as a reverse voltage on the photodiode PD1.
At zero IPD photocurrent, the output sits at the same volt-
age and rises as photocurrent increases. As mentioned
before, R2 and R3 set the JFET gain to 1 at low frequency.
Figure 5. Low Noise Low Power DC Accurate
Single Supply Photodiode Amplifier
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6247CTS8TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:180MHz, 1mA Power Efficient Rail-to-Rail I/O Op Amps |
| LTC6247HTS8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:180MHz, 1mA Power Efficient Rail-to-Rail I/O Op Amps |
| LTC6247HTS8#PBF | 制造商:Linear Technology 功能描述:IC OP-AMP 180MHZ 90V/ us TSOT-23-8 制造商:Linear Technology 功能描述:IC, OP-AMP, 180MHZ, 90V/ us, TSOT-23-8, Op Amp Type:Low Power, No. of Amplifiers:2, Slew Rate:90V/s, Supply Voltage Range:2.5V to 5.25V, Amplifier Case Style:TSOT-23, No. of Pins:8, Bandwidth:180MHz, Operating Temperature Min:-40C , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:SC-Amps/High Speed, Cut Tape Dual 180MHz, 1MA RRIO Op Amp |
| LTC6247HTS8#TRMPBF | 功能描述:IC OPAMP RRIO 180MHZ DL TSOT23-8 RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 放大器类型:电流检测 电路数:1 输出类型:- 转换速率:- 增益带宽积:125kHz -3db带宽:- 电流 - 输入偏压:- 电压 - 输入偏移:100µV 电流 - 电源:1.1µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:4-WFBGA，CSPBGA 供应商设备封装:4-UCSP（2x2） 包装:剪切带 (CT) 其它名称:MAX9634WERS+TCT |
| LTC6247HTS8#TRPBF | 功能描述:IC OPAMP RRIO 180MHZ DL TSOT23-8 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 |
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