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| 型号： | LTC6911CMS-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/20页 |
| 文件大小： | 0K |
| 描述： | IC PGA DIGITAL R-R DUAL 10MSOP |
| 标准包装： | 50 |
| 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： | 0°C ~ 70°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： | 管件 |
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In noise sensitive applications where AGND does not
directly tie to a ground plane, as in Figures 2 and 4, it is
important to AC-bypass the AGND pin. Otherwise, chan-
nel-to-channel isolation is degraded and wideband noise
will enter the signal path from the thermal noise of the
internal voltage divider resistors that present a Thévenin
equivalent resistance of approximately 5k
. This noise
can reduce SNR by at least 3dB at high gain settings. An
external capacitor from AGND to the ground plane, whose
impedance is well below 5k
at frequencies of interest,
will filter and suppress this noise. A 1
F high quality
capacitor is effective for frequencies down to 1kHz. Larger
capacitors extend this suppression to lower frequencies.
This issue does not arise in dual supply applications
because the AGND pin ties directly to ground.
In applications requiring an analog ground reference other
than half the total supply voltage, the user can override the
built-in analog ground reference by tying the AGND pin to
a reference voltage within the AGND voltage range speci-
fied in the Electrical Characteristics table. The AGND pin
will load the external reference with approximately 5k
returned to the half-supply potential. AGND should still be
capacitively bypassed to a ground plane as noted above.
Do not connect the AGND pin to the V– pin.
INB (Pin 3): Analog Input. Refer to INA pin description.
G0, G1, G2 (Pins 4, 5, 6): CMOS-Level Digital Gain
Control Inputs. G2 is the most significant bit (MSB) and G0
is the least significant bit (LSB). These pins control the
voltage gain settings for both channels (see Tables 1
and 2). Each channel’s gain cannot be set independent of
the other channel. The logic input pins (G pins) are allowed
to swing from V– to 10.5V above V–, regardless of V+ so
long as the logic levels meet the minimum requirements
specified in the Electrical Characteristics table. The G0, G1
and G2 pins are high impedance CMOS logic inputs, but
have small pull-down current sources (<10
A) which will
force both channels into the “zero” gain state (digital input
000) if the logic inputs are externally floated. No speed
limitation is associated with the digital logic because it is
memoryless and much faster than the analog signal path.
V–, V+ (Pins 7, 9): Power Supply Pins. The V+ and V– pins
should be bypassed with 0.1
F capacitors to an adequate
analog ground plane using the shortest possible wiring.
Electrically clean supplies and a low impedance ground
are important for the high dynamic range available from
the LTC6911-X (see further details under the AGND pin
description). Low noise linear power supplies are recom-
mended. Switching power supplies require special care to
prevent switching noise coupling into the signal path,
reducing dynamic range.
OUTB (Pin 8): Analog Output. This is the output of the B
channel internal operational amplifier and can swing rail-
to-rail (V+ to V–) as specified in the Electrical Characteris-
tics table. The internal op amp remains active at all times,
including the zero gain setting (digital input 000). For best
performance, loading the output as lightly as possible will
minimize signal distortion and gain error. The Electrical
Characteristics table shows performance at output cur-
rents up to 10mA, and the current limits which occur when
the output is shorted to mid-supply at 2.7V and
±5V
supplies. Signal outputs above 10mA are possible but
current-limiting circuitry will begin to affect amplifier
performance at approximately 20mA. Long-term opera-
tion above 20mA output is not recommended. Do not
exceed a maximum junction temperature of 150
°C. The
output will drive capacitive loads up to 50pF. Capacitances
higher than 50pF should be isolated by a series resistor to
preserve AC stability.
OUTA (Pin 10): Analog Output. Refer to OUTB pin
description.
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相关代理商/技术参数 |
参数描述 |
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| LTC6911CMS-2 | 功能描述:IC PGA DIGITAL R-R DUAL 10MSOP RoHS:否 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:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:2pA 电压 - 输入偏移:1000µV 电流 - 电源:85µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):1.8 V ~ 6 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:剪切带 (CT) 产品目录页面:680 (CN2011-ZH PDF) 其它名称:MCP6L04T-E/SLCT |
| LTC6911CMS-2#PBF | 功能描述:IC PGA DIGITAL R-R DUAL 10MSOP 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:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:2pA 电压 - 输入偏移:1000µV 电流 - 电源:85µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):1.8 V ~ 6 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:剪切带 (CT) 产品目录页面:680 (CN2011-ZH PDF) 其它名称:MCP6L04T-E/SLCT |
| LTC6911CMS-2#TR | 功能描述:IC PGA DIGITAL R-R DUAL 10MSOP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°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:管件 |
| LTC6911CMS-2#TRPBF | 功能描述:IC PGA DIGITAL R-R DUAL 10MSOP 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) |
| LTC6911HMS-1 | 功能描述:IC PGA DIGITAL R-R DUAL 10MSOP RoHS:否 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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