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參數(shù)資料
| 型號： | LT1209CS#TR |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP QUAD 45MHZ HS 16SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 4 |
| 轉(zhuǎn)換速率： | 400 V/µs |
| 增益帶寬積： | 45MHz |
| 電流 - 輸入偏壓： | 4µA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 7mA |
| 電流 - 輸出 / 通道： | 40mA |
| 電壓 - 電源，單路/雙路(±)： | 5 V ~ 30 V，±2.5 V ~ 15 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SO |
| 包裝： | 帶卷 (TR) |
LT1208/LT1209
8
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
Low Voltage Operation
The LT1208/LT1209 are functional at room temperature
with only 3V of total supply voltage. Under this condition,
however, the undistorted output swing is only 0.8VP-P . A
more realistic condition is operation at
±2.5V supplies (or
5V and ground). Under these conditions, at room tem-
perature, the typical input common-mode range is 1.9V to
–1.3V (for a VOS change of 1mV), and a 5MHz, 2VP-P sine
wave can be faithfully reproduced. With 5V total supply
voltage the gain-bandwidth is reduced to 26MHz and the
slew rate is reduced to 135V/
s.
Power Dissipation
The LT1208/LT1209 combine high speed and large output
current drive in small packages. Because of the wide
supply voltage range, it is possible to exceed the maxi-
mum junction temperature under certain conditions.
Maximum junction temperature (TJ) is calculated from the
ambient temperature (TA) and power dissipation (PD) as
follows:
LT1208CN8: TJ = TA + (PD × 100°C/W)
LT1208CS8: TJ = TA + (PD × 150°C/W)
LT1209CN:
TJ = TA + (PD × 70°C/W)
LT1209CS:
TJ = TA + (PD × 100°C/W)
Maximum power dissipation occurs at the maximum
supply current and when the output voltage is at 1/2 of
either supply voltage (or the maximum swing if less than
1/2 supply voltage).
For each amplifier PDMAX is as follows:
Example: LT1208 in S8 at 70
°C, VS = ±10V, RL = 500
DAC Current-to-Voltage Converter
The wide bandwidth, high slew rate and fast settling time
of the LT1208/LT1209 make them well-suited for current-
to-voltage conversion after current output D/A converters.
A typical application with a DAC-08 type converter (full-
scale output of 2mA) uses a 5k feedback resistor. A 7pF
compensation capacitor across the feedback resistor is
used to null the pole at the inverting input caused by the
DAC output capacitance. The combination of the LT1208/
LT1209 and DAC settles to less than 40mV (1LSB) in
140ns for a 10V step.
Large-Signal Transient Response
AV = 1
1208/09 AI04
AV = –1
1208/09 AI06
Large-Signal Transient Response
PDMAX = (V
+ – V–)(I
SMAX) +
(0.5V+)
2
RL
PDMAX = (20V)(10.5mA) +
= 260mW
(5V)
2
500
TJ = 70°C + (2 × 260mW)(150°C/W) = 148°C
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