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参数资料
| 型号： | LTC6911HMS-2#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC PGA DIGITAL R-R DUAL 10MSOP |
| 标准包装： | 2,500 |
| 放大器类型： | 可编程增益 |
| 电路数： | 2 |
| 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： | 2000µV |
| 电流 - 电源： | 3.1mA |
| 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 ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
LTC6911-1/LTC6911-2
13
sn691112 691112fs
AGND (Pin 2): Analog Ground. The AGND pin is at the
midpoint of an internal resistive voltage divider, develop-
ing a potential halfway between the V+ and V– pins, with an
equivalent series resistance to the pin of nominally 5k
(Figure 1). AGND is also the noninverting input to both the
internal channel A and channel B amplifiers. This makes
AGND the ground reference voltage for the INA, INB, OUTA
and OUTB pins. Recommended analog ground plane con-
nection depends on how power is applied to the LTC6911-X
(see Figures 2, 3 and 4). Single power supply applications
typically use V– for the system signal ground. The analog
ground plane in single supply applications should there-
fore tie to V–, and the AGND pin should be bypassed to this
ground plane by a high quality capacitor of at least 1
F
(Figure 2). The AGND pin provides an internal analog
reference voltage at half the V+ supply voltage. Dual supply
applications with symmetrical supplies (such as
±5V)
have a natural system ground plane potential of zero volts,
which can be tied directly to the AGND pin, making the zero
volt ground plane the input and output reference voltage
for the LTC6911-X (Figure 3). Finally, if dual asymmetrical
power supplies are used, the supply ground is still the
natural ground plane voltage. To maximize signal swing
UU
U
PI FU CTIO S
capability with an asymmetrical supply, however, it is
often desirable to refer the LTC6911-X’s analog input and
output to a voltage equidistant from the two supply rails V+
and V–. The AGND pin will provide such a potential when
open-circuited and bypassed with a capacitor (Figure 4).
Figure 3. Dual Supply Ground Plane Connection
Figure 2. Single Supply Ground Plane Connection
LTC6911-X
DIGITAL GROUND PLANE
(IF ANY)
ANALOG
GROUND
PLANE
1
SINGLE-POINT
SYSTEM GROUND
23
4
5
691112 F03
10
9
8
7
6
0.1
F
V–
V+
0.1
F
Figure 4. Asymmetrical Dual Supply Ground Plane Connection
LTC6911-X
DIGITAL GROUND PLANE
(IF ANY)
ANALOG
GROUND
PLANE
1
SINGLE-POINT
SYSTEM GROUND
23
4
5
691112 F04
10
9
8
7
6
0.1
F
V–
V+
0.1
F
≥1F
REFERENCE
V+ + V–
2
DIGITAL GROUND PLANE
(IF ANY)
ANALOG
GROUND
PLANE
SINGLE-POINT
SYSTEM GROUND
REFERENCE
V+
2
691112 F02
≥1F
LTC6911-X
12
3
4
5
10
9
8
7
6
V+
0.1
F
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