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부품번호 | CS3301A 기능 |
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기능 | Differential Amplifier | ||
제조업체 | Cirrus Logic | ||
로고 | |||
전체 16 페이지수
CS3301A
Low-noise, Programmable Gain, Differential Amplifier
Features & Desription
z Signal Bandwidth: DC to 2 kHz
z Selectable Gain: x1, x2, x4, x8, x16, x32, x64
z Differential Inputs, Differential Outputs
• Multiplexed inputs: INA, INB, 800Ω termination
• Rough / fine outputs for CS5371A / 72A / 73A
• Max signal amplitude: 5 Vpp differential
• Low input bias: 1 nA typical
z Outstanding Noise Performance
• 8.5 nV/ Hz from 0.1 Hz to 2 kHz
• 0.180 µVp-p between 0.1 Hz and 10 Hz
z Low Total Harmonic Distortion
• -121 dB THD typical (0.0000891%)
• -112 dB THD maximum (0.0002512%)
z Low Power Consumption
• Normal operation: 5.5 mA typical
• Power down: 10 µA typical
z Small 24-pin SSOP Package
z Bipolar Power Supply Configuration
• VA+ = +2.5 V; VA- = -2.5 V; VD = +3.3 V
Description
The CS3301A is a low-noise differential input, dif-
ferential output amplifier with programmable gain,
optimized for amplifying signals from low-imped-
ance sensors such as geophones. The gain
settings are binary weighted (x1, x2, x4, x8, x16,
x32, x64) and are selected using simple pin set-
tings. Two sets of external inputs, INA and INB,
simplify system design as inputs from a sensor and
test DAC. An internal 800 Ω termination can also be
selected for noise tests.
Amplifier noise performance is outstanding with a
noise density of 8.5 nV/ Hz over the 0.1 Hz to
2 kHz bandwidth. Distortion performance is also ex-
tremely good, typically -121 dB THD at x1 gain. Flat
noise down to 0.1 Hz and low total harmonic distor-
tion make this amplifier ideal for low-frequency,
low-amplitude, differential signals requiring maxi-
mum dynamic range.
ORDERING INFORMATION
See page 15.
VA+
CLK
VD
INA+
INB+
+
OUTR+
- OUTF+
MUX0
MUX1
GAIN0
GAIN1
GAIN2
INA-
INB-
VA-
-
+
PWDN GND
OUTF-
OUTR-
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2007
(All Rights Reserved)
MAR ‘07
DS757F1
CS3301A
ANALOG CHARACTERISTICS
Parameter
Symbol
Noise Performance
Input Voltage Noise
f0 = 0.1 Hz to 10 Hz VNPP
Input Voltage Noise Density f0 = 0.1 Hz to 2 kHz VND
Input Current Noise Density
Distortion Performance
(Note 4) IND
Total Harmonic Distortion (Note 5)
x1
x2
x4
x8 THD
x16
x32
x64
Linearity (Note 5)
x1
x2
x4
x8 LIN
x16
x32
x64
Min
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Notes: 4. Guaranteed by design and/or characterization.
5. Tested with a full scale input signal of 31.25 Hz.
CS3301A
Typ
Max
Unit
0.18
8.5
100
0.40
12.0
-
µVp-p
nV/ Hz
fA/ Hz
-121
-120
-120
-120
-120
-119
-116
0.0000891
0.0001000
0.0001000
0.0001000
0.0001000
0.0001122
0.0001585
-112
-
-
-
-
-
-
0.0002512
-
-
-
-
-
-
dB
%
CS3301A In-Band Noise
20
15
10
5
0
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Frequency (Hz)
CS3301A Wide Band Noise
300
250
200
150
100
50
0
0.1
1
10 100 1000 10000 100000 1E+06
Frequency (Hz)
Figure 1. CS3301A Noise Performance
4 DS757F1
4페이지 CS3301A
DIGITAL CHARACTERISTICS
Parameter
Digital Characteristics
High Level Input Drive Voltage
(Note 15)
Low Level Input Drive Voltage
(Note 15)
Input Leakage Current
Digital Input Capacitance
Rise Times, Digital Inputs Except CLK
Fall Times, Digital Inputs Except CLK
Master Clock Specifications
Master Clock Frequency
(Note 16)
Master Clock Duty Cycle
Master Clock Rise Time
Master Clock Fall Time
Master Clock Jitter (In-Band or Aliased In-Band)
Master Clock Jitter (Out-of-Band)
Symbol
VIH
VIL
IIN
CIN
tRISE
tFALL
fCLK
fDTY
tRISE
tFALL
JTRIB
JTROB
CS3301A
Min Typ Max
0.6*VD
0.0
-
-
-
-
-
-
±1
9
-
-
VD
0.8
±10
-
100
100
2.0 2.048 2.2
40 - 60
- - 25
- - 25
- - 300
- -1
Unit
V
V
µA
pF
ns
ns
MHz
%
ns
ns
ps
ns
Notes: 15. Device is intended to be driven with CMOS logic levels.
16. When CLK is tied to GND, an internal oscillator provides a master clock at approximately 2 MHz. CLK
should be driven for synchronous system operation.
t rise
t fa ll
0.9 * VD
0.1 * VD
Figure 2. Digital Input Rise and Fall Times
Input Selection
800 Ω termination
INA only
INB only
INA + INB
MUX1
0
1
0
1
MUX0
0
0
1
1
Gain Selection
x1
x2
x4
x8
x16
x32
x64
reserved
GAIN2
0
0
0
0
1
1
1
1
GAIN1
0
0
1
1
0
0
1
1
GAIN0
0
1
0
1
0
1
0
1
Table 1. Digital Selections for Gain and Input Mux Control
DS757F1
7
7페이지 | |||
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부품번호 | 상세설명 및 기능 | 제조사 |
CS3301 | Differential Amplifier | Cirrus Logic |
CS3301A | Differential Amplifier | Cirrus Logic |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |