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| 型號： | AD28msp01KST⒂ |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | PSTN Signal Port |
| 中文描述： | PSTN的信號端口 |
| 文件頁數(shù)： | 17/28頁 |
| 文件大?。?/td> | 368K |
| 代理商： | AD28MSP01KST⒂ |
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AD28msp01
REV. A
–17–
V
OUTP
V
OUTN
–12V
4
7
SSM2141
GND
A
5
1
V
OUT
0.1
μ
F
GND
A
+12V
AD28msp01
0.1
μ
F
GND
A
Figure 15. Example Circuit for Single-Ended Output
Single Power Supply Operation
Use of a single +5 V power supply is possible with the
AD28msp01. If a single supply is used, the analog power supply
input to the device must be properly filtered. The proper filter is
dependent on the noise present in your system.
PC Board Layout Considerations
Separate analog and digital ground planes should be provided
for the AD28msp01 in order to assure the characteristics of the
device’s ADC and DAC. The two ground planes should be con-
nected only at a single point. The point of connection may be at
the system power supply, at the PC board power connection, or
at any other appropriate location. Multiple connections between
the analog and digital ground planes should be avoided.
The ground planes should be designed such that all noise-
sensitive areas are isolated from one another and critical signal
traces (such as digital clocks and analog signals) are as short as
possible.
Each +5 V supply pin of the AD28msp01 should be bypassed to
ground with a 0.1
μ
F capacitor. These capacitors should be low
inductance, monolithic, ceramic, and surface-mount. The ca-
pacitor leads and PC board traces should be as short as possible
to minimize inductive effects. In addition, a 10
μ
F capacitor
should be connected between V
DD
and ground, near the PC
board power connection.
MCLK Frequency
The sigma-delta converters and digital filters of the AD28msp01
are specifically designed to operate at a master clock (MCLK)
frequency of 13.824 MHz. MCLK must equal 13.824 MHz to
guarantee the filter characteristics and sample rate of the ADC
and DAC. The AD28msp01 is not tested or characterized at
any other clock frequency.
DEFINITION OF SPECIFICATIONS
Typical (Typ) specifications represent nominal performance at
+25
°
C with V
CC
and V
DD
set to +5 V.
Minimum (Min) and Maximum (Max) specifications are guar-
anteed across the full operating range, however, devices are
tested only at the indicated test conditions.
Absolute Gain
Absolute gain is a measure of converter gain for a known signal.
Absolute gain is measured with a 1.0 kHz sine wave at 0 dBm0.
The absolute gain specification is used as a reference for gain
tracking error specification.
Gain Tracking Error
Gain tracking error measures changes in converter output for
different signal levels relative to an absolute signal level. The ab-
solute signal level is 1 kHz at 0 dBm0 (equal to absolute gain).
Gain tracking error at 0 dBm0 is 0 dB by definition.
SNR
Signal-to-noise ratio is defined to be the ratio of the rms value of
the measured input signal to the rms sum of all the spectral
components in the specified passband, excluding dc and har-
monic components.
THD
Total harmonic distortion is defined to be the ratio of the rms
value of the measured input signal to the rms sum of the har-
monic components in the specified passband.
Intermodulation Distortion
With inputs consisting of sine waves at two frequencies, f
a
and
f
b
, any active device with nonlinearities will create distortion
products at sum and difference frequencies of mf
a
±
nf
b
where
m, n = 0, 1, 2, 3, etc. Intermodulation terms are those for which
neither m nor n are equal to zero. This specification contains
the second order terms include (f
a
+ f
b
) and (f
a
– f
b
), and the
third order terms include (2f
a
+ f
b
), (2f
a
– f
b
), (f
a
+ 2f
b
), and
(f
a
– 2f
b
).
Idle Channel Noise
Idle channel noise is defined as the total signal energy measured
at the output of the device when the input is grounded (mea-
sured in the specified passband).
Crosstalk
Crosstalk is defined as the ratio of the amplitude of a 0 dB sig-
nal appearing on one channel to the amplitude of the same sig-
nal coupled onto the other, idle channel. Crosstalk is expressed
in dB.
Power Supply Rejection
Power supply rejection measures the susceptibility of a device to
noise on the power supply. Power supply rejection is measured
by modulating the power supply with a 1 kHz, 100 mV p-p
sine
wave and measuring the relative level at the output.
Group Delay
Group delay is defined as the derivative of radian phase with re-
spect to radian frequency,
φ(ω)/ω
. Group delay is a measure
of the linearity of the phase response of a linear system. A linear
system with a constant group delay has a linear phase response.
The deviation of the group delay away from a constant indicates
the degree of nonlinear phase response of the system.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD28MSP01KP | PSTN Signal Port |
| AD28MSP01KR | PSTN Signal Port |
| AD28MSP02 | RD Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 24V; Output Voltage (Vdc): 15V; Power: 2W; Low Cost 2W Dual Output Converter; Industry Standard SIP7 and DIP14 Packages; Power Sharing on Outputs; Optional Continuous Short Circuit Protected; 1kVDC & 2kVDC Isolation Options; UL94V-0 Package Material; Efficiency to 86% |
| AD28MSP02BN | Voiceband Signal Port |
| AD28MSP02BR | Voiceband Signal Port |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD28MSP01KST⒂ | 制造商:AD 制造商全稱:Analog Devices 功能描述:PSTN Signal Port |
| AD28MSP02 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Voiceband Signal Port |
| AD28MSP02BN | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD28MSP02BR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD28MSP02KN | 制造商:AD 制造商全稱:Analog Devices 功能描述:Voiceband Signal Port |
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