参数资料
型号: AD847AR-REEL7
厂商: Analog Devices Inc
文件页数: 4/12页
文件大小: 0K
描述: IC OPAMP GP 50MHZ LP 32MA 8SOIC
标准包装: 750
放大器类型: 通用
电路数: 1
转换速率: 300 V/µs
增益带宽积: 50MHz
电流 - 输入偏压: 3.3µA
电压 - 输入偏移: 500µV
电流 - 电源: 5.3mA
电流 - 输出 / 通道: 32mA
电压 - 电源,单路/双路(±): ±4.5 V ~ 18 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SO
包装: 带卷 (TR)
AD847
REV. F
–12–
C1191f–10–9/92
PRINTED
IN
U.S.A.
HIGH SPEED DAC BUFFER
The wide bandwidth and fast settling time of the AD847 makes
it a very good output buffer for high speed current-output D/A
converters like the AD668. As shown in Figure 27, the op amp
establishes a summing node at ground for the DAC output. The
output voltage is determined by the amplifier’s feedback resistor
(10.24 V for a 1 k
resistor). Note that since the DAC gener-
ates a positive current to ground, the voltage at the amplifier
output will be negative. A 100
series resistor between the
noninverting amplifier input and ground minimizes the offset
effects of op amp input bias currents.
1
2
3
7
24
23
22
18
8
9
10
17
16
15
11
12
14
13
4
5
21
20
6
19
AD668
+15V
10
F
TO ANALOG
GROUND PLANE
0.1
F
+
1V NOMINAL
REFERENCE INPUT
10k
1k
100
AD847
ANALOG GROUND PLANE
ANALOG
OUTPUT
ANALOG
SUPPLY
GROUND
0.1
F
10
F
–15V
+5V
1k
100pF
DIGITAL
INPUTS
MSB
LSB
V
REFCOM
REFIN1
REFIN2
R
ACOM
LCOM
IBPO
V
THCOM
VTH
EE
LOAD
OUT
CC
I
Figure 27. High Speed DAC Buffer
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
All brand or product names mentioned are trademarks or registered trademarks of their respective holders.
Cerdip (Q-8) Package
0.320 (8.13)
0.290 (7.37)
0.015 (0.38)
0.008 (0.20)
15
°
0
°
0.005 (0.13) MIN
0.055 (1.40) MAX
1
PIN 1
4
5
8
0.310 (7.87)
0.220 (5.59)
0.405 (10.29) MAX
0.200
(5.08)
MAX
SEATING
PLANE
0.023 (0.58)
0.014 (0.36)
0.070 (1.78)
0.030 (0.76)
0.060 (1.52)
0.015 (0.38)
0.150
(3.81)
MIN
0.200 (5.08)
0.125 (3.18)
0.100
(2.54)
BSC
Mini-DIP (N-8) Package
0.011±0.003
(0.28±0.08)
0.30 (7.62)
REF
15
°
0
°
PIN 1
4
5
8
1
0.25
(6.35)
0.31
(7.87)
0.10
(2.54)
BSC
SEATING
PLANE
0.035±0.01
(0.89±0.25)
0.18±0.03
(4.57±0.76)
0.033
(0.84)
NOM
0.018±0.003
(0.46±0.08)
0.125
(3.18)
MIN
0.165±0.01
(4.19±0.25)
0.39 (9.91) MAX
Small Outline (R-8) Package
0.019 (0.48)
0.014 (0.36)
0.050
(1.27)
BSC
0.102 (2.59)
0.094 (2.39)
0.197 (5.01)
0.189 (4.80)
0.010 (0.25)
0.004 (0.10)
0.098 (0.2482)
0.075 (0.1905)
0.190 (4.82)
0.170 (4.32)
0.030 (0.76)
0.018 (0.46)
10
°
0
°
0.090
(2.29)
8
°
0
°
0.020 (0.051) x 45
°
CHAMF
1
8
5
4
PIN 1
0.157 (3.99)
0.150 (3.81)
0.244 (6.20)
0.228 (5.79)
0.150 (3.81)
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