- 鎮ㄧ従(xi脿n)鍦ㄧ殑浣嶇疆锛�璨疯常IC缍�(w菐ng) > PDF鐩寗3437 > LTC6911HMS-1 (Linear Technology)IC PGA DIGITAL R-R DUAL 10MSOP PDF璩囨枡涓嬭級
鍙冩暩(sh霉)璩囨枡
| 鍨嬭櫉(h脿o)锛� | LTC6911HMS-1 |
| 寤犲晢锛� | Linear Technology |
| 鏂囦欢闋佹暩(sh霉)锛� | 8/20闋� |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC PGA DIGITAL R-R DUAL 10MSOP |
| 妯�(bi膩o)婧�(zh菙n)鍖呰锛� | 50 |
| 鏀惧ぇ鍣ㄩ鍨嬶細 | 鍙法绋嬪鐩� |
| 闆昏矾鏁�(sh霉)锛� | 2 |
| 杓稿嚭椤炲瀷锛� | 婊挎摵骞� |
| 杞�(zhu菐n)鎻涢€熺巼锛� | 16 V/µs |
| 澧炵泭甯跺绌嶏細 | 11MHz |
| 闆诲 - 杓稿叆鍋忕Щ锛� | 2000µV |
| 闆绘祦 - 闆绘簮锛� | 3.1mA |
| 闆绘祦 - 杓稿嚭 / 閫氶亾锛� | 35mA |
| 闆诲 - 闆绘簮锛屽柈璺�/闆欒矾(±)锛� | 2.7 V ~ 10.5 V锛�±2.7 V ~ 5.25 V |
| 宸ヤ綔婧害锛� | -40°C ~ 125°C |
| 瀹夎椤炲瀷锛� | 琛ㄩ潰璨艰 |
| 灏佽/澶栨锛� | 10-TFSOP锛�10-MSOP锛�0.118"锛�3.00mm 瀵級 |
| 渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 | 10-MSOP |
| 鍖呰锛� | 鍓垏甯� (CT) |
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LTC6911-1/LTC6911-2
16
sn691112 691112fs
APPLICATIO S I FOR ATIO
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of 1, or 1.5mV at a gain setting of 2. At high gains, VOS(IN)
approaches VOS(OA). (Offset voltage is random and can
have either polarity centered on 0V.) The MOS input
circuitry of the internal op amp in Figure 1 draws negligible
input currents (unlike some op amps), so only VOS(OA) and
G affect the overall amplifier鈥檚 offset.
AC-Coupled Operation
Adding capacitors in series with the INA and INB pins
convert the LTC6911-X into a dual AC-coupled inverting
amplifier, suppressing the input signal鈥檚 DC level (and also
adding the additional benefit of reducing the offset voltage
from the LTC6911-X鈥檚 amplifier itself). No further compo-
nents are required because the input of the LTC6911-X
biases itself correctly when a series capacitor is added.
The INA and INB analog input pins connect internally to a
resistor whose nominal value varies between 10k and 1k
depending on the version of LTC6911 used (see the
rightmost column of Tables 1 and 2). Therefore, the low
frequency cutoff will vary with capacitor and gain setting.
For example, if a low frequency corner of 1kHz or lower on
the LTC6911-1 is desired, use a series capacitor of 0.16
F
or larger. A 0.16
F capacitor has a reactance of 1k at
1kHz, giving a 1kHz lower 鈥�3dB frequency for gain settings
of 10V/V through 100V/V. If the LTC6911-1 is operated at
lower gain settings with an 0.16
F capacitor, the higher
input resistance will reduce the lower corner frequency
down to 100Hz at a gain setting of 1V/V. These frequencies
scale inversely with the value of the input capacitor used.
Note that operating the LTC6911 family in 鈥渮ero鈥� gain
mode (digital inputs 000) open circuits the INA and INB
pins and this demands some care if employed with a series
AC-coupled input capacitor. When the chip enters the zero
gain mode, the opened INA or INB pin tends to sample and
freeze the voltage across the capacitor to the value it held
just before the zero gain state. This can place the INA or
INB pin at or near the DC potential of a supply rail (the INA
or INB pin may also drift to a supply potential in this state
due to small junction leakage currents). To prevent driving
the INA or INB pin outside the supply limit and potentially
damaging the chip, avoid AC input signals in the zero gain
state with an AC-coupled capacitor. Also, switching later
to a nonzero gain value will cause a transient pulse at the
output of the LTC6911-1 (with a time constant set by the
capacitor value and the new LTC6911-1 input resistance
value). This occurs because the INA and INB pins return to
the AGND potential forcing transient current sourced by
the amplifier output to charge the AC-coupling capacitor to
its proper DC blocking value.
SNR and Dynamic Range
The term 鈥渄ynamic range鈥� is much used (and abused)
with signal paths. Signal-to-noise ratio (SNR) is an unam-
biguous comparison of signal and noise levels, measured
in the same way and under the same operating conditions.
In a variable gain amplifier, however, further characteriza-
tion is useful because both noise and maximum signal
level in the amplifier will vary with the gain setting, in
general. In the LTC6911-X, maximum output signal is
independent of gain (and is near the full power supply
voltage, as detailed in the Swing sections of the Electrical
Characteristics table). The maximum input level falls with
increasing gain, and the input-referred noise falls as well
(as also listed in the table). To summarize the useful signal
range in such an amplifier, we define Dynamic Range (DR)
as the ratio of maximum input (at unity gain) to minimum
input-referred noise (at maximum gain). This DR has a
physical interpretation as the range of signal levels that
will experience an SNR above unity V/V or 0dB. At a 10V
total power supply, DR in the LTC6911-X (gains 0V/V to
100V/V) is typically 120dB (the ratio of a nominal 9.9VP-P,
or 3.5VRMS (maximum input), to the 3.8VRMS (high gain
input noise). The SNR of an amplifier is the ratio of input
level to input-referred noise, and can be 110dB with the
LTC6911 family at unity gain.
鐩搁棞(gu膩n)PDF璩囨枡 |
PDF鎻忚堪 |
|---|---|
| 3-647140-1 | CONN HEADER 11POS MTA-156 STR AU |
| 951106-4620-AR-PT | CONN HEADER 6POS 2MM R/A SMD |
| LT2178AIS8#TRPBF | IC OPAMP MICROPOWER DUAL 8-SOIC |
| LT2178AIS8#TR | IC OPAMP PREC DUAL MCRPWR 8SOIC |
| 3-647140-0 | CONN HEADER 10POS MTA-156 STR AU |
鐩搁棞(gu膩n)浠ｇ悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉) |
鍙冩暩(sh霉)鎻忚堪 |
|---|---|
| LTC6911HMS-1#PBF | 鍔熻兘鎻忚堪:IC PGA DIGITAL R-R DUAL 10MSOP RoHS:鏄� 椤炲垾:闆嗘垚闆昏矾 (IC) >> Linear - Amplifiers - Instrumentation 绯诲垪:- 鍏跺畠鏈夐棞(gu膩n)鏂囦欢:Automotive Product Guide 鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 妯�(bi膩o)婧�(zh菙n)鍖呰:1 绯诲垪:- 鏀惧ぇ鍣ㄩ鍨�:閫氱敤 闆昏矾鏁�(sh霉):1 杓稿嚭椤炲瀷:婊挎摵骞� 杞�(zhu菐n)鎻涢€熺巼:3 V/µs 澧炵泭甯跺绌�:10MHz -3db甯跺:- 闆绘祦 - 杓稿叆鍋忓:1pA 闆诲 - 杓稿叆鍋忕Щ:70µV 闆绘祦 - 闆绘簮:2.5mA 闆绘祦 - 杓稿嚭 / 閫氶亾:48mA 闆诲 - 闆绘簮锛屽柈璺�/闆欒矾(±):2.7 V ~ 5.5 V锛�±1.35 V ~ 2.75 V 宸ヤ綔婧害:-40°C ~ 125°C 瀹夎椤炲瀷:琛ㄩ潰璨艰 灏佽/澶栨:SOT-23-6 渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁�:SOT-6 鍖呰:Digi-Reel® 鍏跺畠鍚嶇ū:MAX4475AUT#TG16DKR |
| LTC6911HMS-1#TR | 鍔熻兘鎻忚堪:IC PGA DIGITAL R-R DUAL 10MSOP RoHS:鍚� 椤炲垾:闆嗘垚闆昏矾 (IC) >> Linear - Amplifiers - Instrumentation 绯诲垪:- 鍏跺畠鏈夐棞(gu膩n)鏂囦欢:Automotive Product Guide 鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 妯�(bi膩o)婧�(zh菙n)鍖呰:1 绯诲垪:- 鏀惧ぇ鍣ㄩ鍨�:閫氱敤 闆昏矾鏁�(sh霉):1 杓稿嚭椤炲瀷:婊挎摵骞� 杞�(zhu菐n)鎻涢€熺巼:3 V/µs 澧炵泭甯跺绌�:10MHz -3db甯跺:- 闆绘祦 - 杓稿叆鍋忓:1pA 闆诲 - 杓稿叆鍋忕Щ:70µV 闆绘祦 - 闆绘簮:2.5mA 闆绘祦 - 杓稿嚭 / 閫氶亾:48mA 闆诲 - 闆绘簮锛屽柈璺�/闆欒矾(±):2.7 V ~ 5.5 V锛�±1.35 V ~ 2.75 V 宸ヤ綔婧害:-40°C ~ 125°C 瀹夎椤炲瀷:琛ㄩ潰璨艰 灏佽/澶栨:SOT-23-6 渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁�:SOT-6 鍖呰:Digi-Reel® 鍏跺畠鍚嶇ū:MAX4475AUT#TG16DKR |
| LTC6911HMS-1#TRPBF | 鍔熻兘鎻忚堪:IC PGA DIGITAL R-R DUAL 10MSOP RoHS:鏄� 椤炲垾:闆嗘垚闆昏矾 (IC) >> Linear - Amplifiers - Instrumentation 绯诲垪:- 鍏跺畠鏈夐棞(gu膩n)鏂囦欢:Automotive Product Guide 鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 妯�(bi膩o)婧�(zh菙n)鍖呰:1 绯诲垪:- 鏀惧ぇ鍣ㄩ鍨�:閫氱敤 闆昏矾鏁�(sh霉):1 杓稿嚭椤炲瀷:婊挎摵骞� 杞�(zhu菐n)鎻涢€熺巼:3 V/µs 澧炵泭甯跺绌�:10MHz -3db甯跺:- 闆绘祦 - 杓稿叆鍋忓:1pA 闆诲 - 杓稿叆鍋忕Щ:70µV 闆绘祦 - 闆绘簮:2.5mA 闆绘祦 - 杓稿嚭 / 閫氶亾:48mA 闆诲 - 闆绘簮锛屽柈璺�/闆欒矾(±):2.7 V ~ 5.5 V锛�±1.35 V ~ 2.75 V 宸ヤ綔婧害:-40°C ~ 125°C 瀹夎椤炲瀷:琛ㄩ潰璨艰 灏佽/澶栨:SOT-23-6 渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁�:SOT-6 鍖呰:Digi-Reel® 鍏跺畠鍚嶇ū:MAX4475AUT#TG16DKR |
| LTC6911HMS-2 | 鍔熻兘鎻忚堪:IC PGA DIGITAL R-R DUAL 10MSOP RoHS:鍚� 椤炲垾:闆嗘垚闆昏矾 (IC) >> Linear - Amplifiers - Instrumentation 绯诲垪:- 鍏跺畠鏈夐棞(gu膩n)鏂囦欢:Automotive Product Guide 鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 妯�(bi膩o)婧�(zh菙n)鍖呰:1 绯诲垪:- 鏀惧ぇ鍣ㄩ鍨�:閫氱敤 闆昏矾鏁�(sh霉):1 杓稿嚭椤炲瀷:婊挎摵骞� 杞�(zhu菐n)鎻涢€熺巼:3 V/µs 澧炵泭甯跺绌�:10MHz -3db甯跺:- 闆绘祦 - 杓稿叆鍋忓:1pA 闆诲 - 杓稿叆鍋忕Щ:70µV 闆绘祦 - 闆绘簮:2.5mA 闆绘祦 - 杓稿嚭 / 閫氶亾:48mA 闆诲 - 闆绘簮锛屽柈璺�/闆欒矾(±):2.7 V ~ 5.5 V锛�±1.35 V ~ 2.75 V 宸ヤ綔婧害:-40°C ~ 125°C 瀹夎椤炲瀷:琛ㄩ潰璨艰 灏佽/澶栨:SOT-23-6 渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁�:SOT-6 鍖呰:Digi-Reel® 鍏跺畠鍚嶇ū:MAX4475AUT#TG16DKR |
| LTC6911HMS-2#PBF | 鍔熻兘鎻忚堪:IC PGA DIGITAL R-R DUAL 10MSOP RoHS:鏄� 椤炲垾:闆嗘垚闆昏矾 (IC) >> Linear - Amplifiers - Instrumentation 绯诲垪:- 鍏跺畠鏈夐棞(gu膩n)鏂囦欢:Automotive Product Guide 鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 妯�(bi膩o)婧�(zh菙n)鍖呰:1 绯诲垪:- 鏀惧ぇ鍣ㄩ鍨�:閫氱敤 闆昏矾鏁�(sh霉):1 杓稿嚭椤炲瀷:婊挎摵骞� 杞�(zhu菐n)鎻涢€熺巼:3 V/µs 澧炵泭甯跺绌�:10MHz -3db甯跺:- 闆绘祦 - 杓稿叆鍋忓:1pA 闆诲 - 杓稿叆鍋忕Щ:70µV 闆绘祦 - 闆绘簮:2.5mA 闆绘祦 - 杓稿嚭 / 閫氶亾:48mA 闆诲 - 闆绘簮锛屽柈璺�/闆欒矾(±):2.7 V ~ 5.5 V锛�±1.35 V ~ 2.75 V 宸ヤ綔婧害:-40°C ~ 125°C 瀹夎椤炲瀷:琛ㄩ潰璨艰 灏佽/澶栨:SOT-23-6 渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁�:SOT-6 鍖呰:Digi-Reel® 鍏跺畠鍚嶇ū:MAX4475AUT#TG16DKR |
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