参数资料
型号: LTC6910-1ITS8#TRPBF
厂商: Linear Technology
文件页数: 15/24页
文件大小: 0K
描述: IC PGA DIGITAL R-R I/O TSOT23-8
标准包装: 2,500
放大器类型: 可编程增益
电路数: 1
输出类型: 满摆幅
转换速率: 16 V/µs
增益带宽积: 11MHz
电压 - 输入偏移: 1500µV
电流 - 电源: 3.5mA
电流 - 输出 / 通道: 35mA
电压 - 电源,单路/双路(±): 2.7 V ~ 10.5 V,±2.7 V ~ 5.25 V
工作温度: -40°C ~ 85°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)
LTC6910-1
LTC6910-2/LTC6910-3
22
6910123fa
+
+
8
7
6
5
V
VOUT
R4 15.8k
V
V+
LT1884
C2
1
F
C1
10
F R1
15.8k
2
7
8
3
VIN
6
4
5
1
R2
15.8k
0.1
F
GN2 GN1 GN0
0
1
GAIN = 1
0
1
0
GAIN = 2
0
1
GAIN = 5
1
0
GAIN = 10
1
0
1
GAIN = 20
1
0
GAIN = 50
1
GAIN = 100
BW2 BW1BW0
BANDWIDTH 1Hz TO 10Hz
0
1
BANDWIDTH 1Hz TO 20Hz
0
1
0
BANDWIDTH 1Hz TO 50Hz
0
1
BANDWIDTH 1Hz TO 100Hz
1
0
BANDWIDTH 1Hz TO 200Hz
1
0
1
BANDWIDTH 1Hz TO 500Hz
1
0
BANDWIDTH 1Hz TO 1000Hz
1
0.1
F
0.1
F
V+
V
1
2
3
4
2
7
8
3
6
4
5
1
0.1
F
0.1
F
0.1
F
V+ V
LTC6910-1
R3
15.8k
BANDWIDTH
CONTROL
GAIN
CONTROL
FREQUENCY (Hz)
–60
GAIN
(dB)
–50
–30
–20
0
10
1
100
1k
100k
6910 F06b
–70
10
10k
–10
–40
–80
GN2 GN1 GN0 = 001
BW2
1
BW1
0
BW0
0
BW2
0
BW1
0
BW0
1
BW2
1
BW1
1
BW0
1
Gain vs Frequency
Figure 8. Low Noise AC Amplifier with Programmable Gain and Bandwidth
TYPICAL APPLICATIO S
U
Measured frequency responses in Figure 8 with
LTC6910-1 PGAs demonstrate bandwidth settings of 10Hz,
100Hz and 1kHz, with digital codes at the BW inputs of
respectively 001, 100 and 111, and unity gain in each case.
By scaling C2, this circuit can serve other bandwidths,
such as a maximum of 10kHz with 0.1
F using LT1884
(gain-bandwidth product around 1MHz). Noise floor from
internal sources yields an output SNR of 76dB with 10mVP-
P input, gain of 100 and 100Hz bandwidth; for 100mVP-P
input, gain of 10 and 1000Hz bandwidth it is 64dB.
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