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参数资料
| 型号： | SSM2475 |
| 厂商： | Analog Devices, Inc. |
| 元件分类： | 运动控制电子 |
| 英文描述： | Single Audio Amplifier |
| 中文描述： | 单音频放大器 |
| 文件页数： | 11/16页 |
| 文件大小： | 192K |
| 代理商： | SSM2475 |
SSM2275/SSM2475
REV. A
–11–
FREQUENCY – kHz
–100
–130
–160
0
22
N
10
20
–110
–120
–140
–150
V
SY
=
6
5V
A
V
=
1
1
R
L
= 100k
V
V
IN
= 0dBV
FREQUENCY – kHz
–100
–130
–160
0
22
N
10
20
–110
–120
–140
–150
V
SY
=
1
5V
A
V
= –1
R
L
= 100k
V
V
IN
= 0dBV
Figure 31. Spectral Graph of Amplifier Outputs
Settling Time
The high slew rate and wide gain-bandwidth product of the
SSM2275 and SSM2475 amplifiers result in fast settling times
(t
S
< 1
μ
s) that are suitable for 16- and 20-bit applications. The
test circuit used to measure the settling time of the SSM2275/
SSM2475 is shown in Figure 32. This test method has advan-
tages over false-sum node techniques of measuring settling times
in that the actual output of the amplifier is measured, instead of
an error voltage at the sum node. Common-mode settling ef-
fects are also taken into account in this circuit in addition to
slew rate and bandwidth factors.
The output waveform of the device under test is clamped by
Schottky diodes and buffered by the JFET source follower. The
signal is amplified by a factor of ten by the OP260 current feed-
back amplifier and then Schottky-clamped at the output to the
oscilloscope. The 2N2222 transistor sets up the bias current for
the JFET and the OP41 is configured as a fast integrator, pro-
viding overall dc offset nulling at the output.
SETTLING TIME – ns
10
6
–10
400
600
S
800
1000
1200
2
–2
–6
8
4
0
–4
–8
–0.01%
1
0.1%
1
0.01%
Figure 33. Settling Time vs. Step Size
Overdrive Recovery
The overdrive, or overload, recovery time of an amplifier is the time
required for the output voltage to return to a rated output voltage
from a saturated condition. This recovery time can be important in
applications where the amplifier must recover quickly after a large
transient event, or overload. The circuit in Figure 34 was used to
evaluate the recovery time for the SSM2275/SSM2475. Also shown
are the input and output voltages. It takes approximately 0.5
μ
s for
the device to recover from output overload.
R1
1k
V
R
S
909
V
R
F
10k
V
+5V
–5V
R
L
10k
V
V
OUT
V
IN
2V p-p
10kHz
Figure 34. Overload Recovery Time Test Circuit
9V–15V
0.1
m
F
V+
6
5V
R
L
1k
V
D1
D2
+15V
2N4416
1k
V
D3
D4
OUTPUT
(TO SCOPE)
1
m
F
10k
V
IC2
R
F
2k
V
750
V
2N2222A
15k
V
–15V
1N4148
DUT
1/2 OP260AJ
9V–15V
0.1
m
F
10k
V
–
+
+
–
SCHOTTKY DIODES D1–D4 ARE
HEWLETT-PACKARD HP5082-2835
IC1 IS 1/2 OP260AJ
IC2 IS PMI OP41EJ
V–
R
G
222
V
Figure 32. Settling Time Test Fixture
相关PDF资料 |
PDF描述 |
|---|---|
| SSM2275 | Single Audio Amplifier |
| SSM2275P | Single Audio Amplifier |
| SSM2275RM | Single Audio Amplifier |
| SSM2275S | Single Audio Amplifier |
| SSM2475RU | Single Audio Amplifier |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SSM-2475 | 制造商:AD 制造商全称:Analog Devices 功能描述:Rail-to-Rail Output Audio Amplifiers |
| SSM2475RU | 制造商:AD 制造商全称:Analog Devices 功能描述:Rail-to-Rail Output Audio Amplifiers |
| SSM2475S | 制造商:AD 制造商全称:Analog Devices 功能描述:Rail-to-Rail Output Audio Amplifiers |
| SSM24-8 | 制造商:SYSTEMSENSOR 制造商全称:SYSTEMSENSOR 功能描述:Alarm Bells |
| SSM24ALPT | 制造商:CHENMKO 制造商全称:Chenmko Enterprise Co. Ltd. 功能描述:SCHOTTKY BARRIER RECTIFIER |
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