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參數(shù)資料
| 型號(hào)： | LT1492 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 5MHz, 3V/us, Low Power Single Supply, Dual and Quad Precision Op Amps |
| 中文描述： | 5MHz的，3V/us，低功耗，單電源，雙核和四精密運(yùn)算放大器 |
| 文件頁(yè)數(shù)： | 12/16頁(yè) |
| 文件大小： | 361K |
| 代理商： | LT1492 |
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12
LT1492/LT1493
Feedback Components
Because the input currents of the LT1492/LT1493 are less
than 100nA, it is possible to use high value feedback
resistors to set the gain. However, care must be taken to
insure that the pole that is formed by the feedback resis-
tors and the input capacitance does not degrade the
stability of the amplifier. For example, if a single supply,
noninverting gain of 2 is set with two 62k resistors, the
LT1492/LT1493 will probably oscillate. This is because
the amplifier goes open-loop at 1MHz (6dB of gain) and
has 50
°
of phase margin. The feedback resistors and the
10pF input capacitance generate a pole at 500kHz that
introduces 63
°
of phase shift at 1MHz! The solution is
simple, lower the values of the resistors or add a feedback
capacitor of 10pF or more.
Capacitive Loading
The LT1492/LT1493 are optimized for low voltage, single
supply operation. The Maximum Capacitive Load vs Load
Current typical performance curve shows the circuit per-
formance without any load resistance. When the output is
sinking current or driving heavy loads with high supplies,
capacitive load handling is degraded.
APPLICATIO
S I
N
FOR
ATIO
U
W
U
Comparator Applications
Sometimes it is desirable to use an op amp as a compara-
tor. When operating the LT1492/LT1493 on a single 3.3V
or 5V supply, the output interfaces directly with most TTL
and CMOS logic.
The response time of the LT1492/LT1493 is a strong
function of the amount of input overdrive as shown in the
following photos. These amplifiers are unity-gain stable
op amps and not fast comparators, therefore, the logic
being driven may oscillate due to the long transition time.
The output can be speeded up by adding 20mV or more of
hysteresis (positive feedback), but the offset is then a
function of the input direction.
Maximum Capacitive Load vs Load Current
Comparator Response (+)
20mV, 10mV, 5mV, 2mV Overdrives
4
2
0
0
100
I
O
20
μ
s/DIV
V
S
= 5V
R
L
=
∞
1492/93 AI02
Comparator Response (–)
20mV, 10mV, 5mV, 2mV Overdrives
20
μ
s/DIV
V
S
= 5V
R
L
=
∞
1492/93 AI02
0
4
2
0
O
100
I
LOAD CURRENT (mA)
0.1
10
M
100
1000
10000
1
10
100
1492/93 AI01
SOURCING
SINKING
V
S
=
±
2.5V
V
S
=
±
2.5V
V
S
=
±
15V
V
S
=
±
15V
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PDF描述 |
|---|---|
| LT1492CN8 | 5MHz, 3V/us, Low Power Single Supply, Dual and Quad Precision Op Amps |
| LT1492CS8 | 5MHz, 3V/us, Low Power Single Supply, Dual and Quad Precision Op Amps |
| LT1493 | 5MHz, 3V/us, Low Power Single Supply, Dual and Quad Precision Op Amps |
| LT1493CS | 5MHz, 3V/us, Low Power Single Supply, Dual and Quad Precision Op Amps |
| LT1497 | Dual 125mA, 50MHz Current Feedback Amplifier(雙路125mA,50MHz電流反饋放大器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1492CN8 | 功能描述:IC OP-AMP LOW POWER DUAL 8-DIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
| LT1492CN8#PBF | 功能描述:IC OP-AMP LOW POWER DUAL 8-DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
| LT1492CS8 | 功能描述:IC OP-AMP LOW POWER DUAL 8-SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
| LT1492CS8#PBF | 功能描述:IC OP-AMP LOW POWER DUAL 8-SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| LT1492CS8#TR | 功能描述:IC OPAMP PREC DUAL 5MHZ 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件 |
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