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參數(shù)資料
| 型號： | LT1994MPDD#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DIFF AMP/DRIVER LN 8-MSOP |
| 標準包裝： | 2,500 |
| 放大器類型： | 差分 |
| 電路數(shù)： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 65 V/µs |
| 增益帶寬積： | 70MHz |
| 電流 - 輸入偏壓： | 18µA |
| 電壓 - 輸入偏移： | 3000µV |
| 電流 - 電源： | 14.8mA |
| 電流 - 輸出 / 通道： | 85mA |
| 電壓 - 電源，單路/雙路(±)： | 2.375 V ~ 12.6 V，±1.188 V ~ 6.3 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-WFDFN 裸露焊盤 |
| 供應商設(shè)備封裝： | 8-DFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
1
1994fb
LT1994
Low Noise, Low Distortion
Fully Differential Input/
Output Amplier/Driver
The LT
1994 is a high precision, very low noise, low distor-
tion, fully differential input/output amplier optimized for
3V, single-supply operation. The LT1994’s output common
mode voltage is independent of the input common mode
voltage, and is adjustable by applying a voltage on the
VOCM pin. A separate internal common mode feedback
path provides accurate output phase balancing and reduced
even-order harmonics. This makes the LT1994 ideal for
level shifting ground referenced signals for driving dif-
ferential input, single-supply ADCs.
The LT1994 output can swing rail-to-rail and is capable
of sourcing and sinking up to 85mA. In addition to the
low distortion characteristics, the LT1994 has a low input
referred voltage noise of 3nV/√Hz. This part maintains
its performance for supply voltages as low as 2.375V. It
draws only 13.3mA of supply current and has a hardware
shutdown feature that reduces current consumption to
225μA.
The LT1994 is available in an 8-pin MSOP or 8-pin DFN
package.
n Differential Input A/D Converter Driver
n Single-Ended to Differential Conversion
n Differential Amplication with Common Mode
Translation
n Rail-to-Rail Differential Line Driver/Receiver
n Low Voltage, Low Noise, Differential Signal
Processing
n Fully Differential Input and Output
n Wide Supply Range: 2.375V to 12.6V
n Rail-to-Rail Output Swing
n Low Noise: 3nV/√Hz
n Low Distortion, 2VP-P, 1MHz: –94dBc
n Adjustable Output Common Mode Voltage
n Unity-Gain Stable
n Gain-Bandwidth: 70MHz
n Slew Rate: 65V/μs
n Large Output Current: 85mA
n DC Voltage Offset <2mV Max
n Open-Loop Gain: 100V/mV
n Low Power Shutdown
n 8-Pin MSOP or 3mm
× 3mm DFN Package
A/D Preamplier: Single-Ended Input to Differential Output
with Common Mode Level Shifting
LT1994 Driving an LTC1403A-1 1MHz
Sine Wave, 8192 Point FFT Plot
TYPICAL APPLICATION
DESCRIPTION
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
FEATURES
APPLICATIONS
1994 TA01
24.9Ω
3V
0.1μF
24.9Ω
47pF
499Ω
3V 10μF
10μF
0.1μF
VIN
2VP-P
VOCM = 1.5V
GND
VDD
AIN
–
AIN
+
VREF
CONV
SD0
SCK
50.4MHz
LTC1403A-1
+
–
+
LT1994
VOCM
FREQUENCY (MHz)
0
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
DIFFERENTIAL
OUTPUT
MAGNITUDE
(dB)
0
0.35
0.70
1994 TA01b
1.40
1.05
fSAMPLE = 2.8Msps
fIN = 1.001MHz
INPUT = 2VP-P,
SINGLE ENDED
SFDR = 93dB
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