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參數(shù)資料
| 型號： | AD711KR-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 14/16頁 |
| 文件大小： | 0K |
| 描述： | IC OPAMP BIFET PREC 25MA 8SOIC |
| 標準包裝： | 750 |
| 放大器類型： | J-FET |
| 電路數(shù)： | 1 |
| 轉換速率： | 20 V/µs |
| -3db帶寬： | 4MHz |
| 電流 - 輸入偏壓： | 15pA |
| 電壓 - 輸入偏移： | 200µV |
| 電流 - 電源： | 2.5mA |
| 電流 - 輸出 / 通道： | 25mA |
| 電壓 - 電源，單路/雙路(±)： | 9 V ~ 36 V，±4.5 V ~ 18 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
REV. E
AD711
–7–
OPTIMIZING SETTLING TIME
Most bipolar high-speed D/A converters have current outputs;
therefore, for most applications, an external op amp is required
for current-to-voltage conversion. The settling time of the
converter/op amp combination depends on the settling time of
the DAC and output amplifier. A good approximation is:
t
S Total
= (t
S DAC )
2
+(t
S AMP )
2
(1)
The settling time of an op amp DAC buffer will vary with the
noise gain of the circuit, the DAC output capacitance, and with
the amount of external compensation capacitance across the
DAC output scaling resistor.
Settling time for a bipolar DAC is typically 100 ns to 500 ns.
Previously, conventional op amps have required much longer
settling times than have typical state-of-the-art DACs; therefore,
the amplifier settling time has been the major limitation to a
high-speed voltage-output D-to-A function. The introduction
of the AD711/712 family of op amps with their 1
ms (to ±0.01%
of final value) settling time now permits the full high-speed
capabilities of most modern DACs to be realized.
In addition to a significant improvement in settling time, the
low offset voltage, low offset voltage drift, and high open-loop
gain of the AD711 family assures 12-bit accuracy over the full
operating temperature range.
The excellent high-speed performance of the AD711 is shown
in the oscilloscope photos of Figure 2. Measurements were taken
using a low input capacitance amplifier connected directly to the
summing junction of the AD711 – both photos show the worst
case situation: a full-scale input transition. The DAC’s 4 k
W
[10 k
W 8 kW = 4.4 kW] output impedance together with a 10 kW
feedback resistor produce an op amp noise gain of 3.25. The
current output from the DAC produces a 10 V step at the op
amp output (0 to –10 V Figure 2a, –10 V to 0 V Figure 2b.)
Therefore, with an ideal op amp, settling to
±1/2 LSB (±0.01%)
requires that 375
mV or less appears at the summing junction.
This means that the error between the input and output (that
voltage which appears at the AD711 summing junction) must
be less than 375
mV. As shown in Figure 2, the total settling time
for the AD711/AD565 combination is 1.2 microseconds.
OUTPUT
–10V TO +10V
+15V
0.1 F
10pF
0.1 F
AD711K
DAC
IOUT = 4
IREF
CODE
0.5mA
IREF
20k
19.95k
R1
100
BIPOLAR
OFFSET ADJUST
IO
DAC
OUT
10V
SPAN
–15V
20V
SPAN
5k
10V
MSB
LSB
REF
OUT
VCC
REF
IN
REF
GND
R2
100
GAIN
ADJUST
0.1 F
AD565A
BIPOLAR
OFF
9.95k
–VEE
0.1 F
POWER
GND
Figure 1.
±10 V Voltage Output Bipolar DAC
Figure 2. Settling Characteristics for AD711 with AD565A
a. (Full-Scale Negative Transition)
b. (Full-Scale Positive Transition)
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相關代理商/技術參數(shù) |
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| AD711KRZ | 功能描述:IC OPAMP BIFET PREC 25MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉換速率: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） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD711KRZ | 制造商:Analog Devices 功能描述:IC OP-AMP 4MHZ 20V/ ((NW)) 制造商:Analog Devices 功能描述:IC, OP-AMP, 4MHZ, 20V/ us, SOIC-8 |
| AD711KRZ-REEL | 功能描述:IC OPAMP BIFET PREC 25MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:LinCMOS™ 放大器類型:通用 電路數(shù):4 輸出類型:- 轉換速率:0.05 V/µs 增益帶寬積:110kHz -3db帶寬:- 電流 - 輸入偏壓:0.7pA 電壓 - 輸入偏移:210µV 電流 - 電源:57µA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOIC 包裝:管件 產(chǎn)品目錄頁面:865 (CN2011-ZH PDF) 其它名稱:296-1834296-1834-5 |
| AD711KRZ-REEL7 | 功能描述:IC OPAMP BIFET PREC 25MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 其它有關文件:Automotive Product Guide 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉換速率:3 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:70µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:Digi-Reel® 其它名稱:MAX4475AUT#TG16DKR |
| AD711SCHIPS | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision, Low Cost, High Speed, BiFET Op Amp |
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