GR581-PLID [GENNUM]
Continuous Time Filter, 1 Func, Butterworth, Highpass, PDSO10, PLID, 10 PIN;
| 型号： | GR581-PLID |
| 厂家： | 
GENNUM CORPORATION |
| 描述： | Continuous Time Filter, 1 Func, Butterworth, Highpass, PDSO10, PLID, 10 PIN LTE 光电二极管 有源滤波器 |
| 文件： | 总4页 (文件大小：80K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Adaptive Highpass Filter
with Independent Gain Block
GR581DATASHEET
DESCRIPTION
FEATURES
The GR581 is a level-sensitive, adaptive highpass filter
comprised of a current controlled highpass filter, a half- wave
rectifier,avoltageregulatorformicrophonebiasandaseparate
preamplifier.
•
•
•
•
•
•
•
unity gain 12 dB/oct. highpass Butterworth filter
adaptive frequency range from 200 Hz to 2 kHz
rectifier threshold set to 82 dBSPL (adjustable)
low noise, typically 2.6 µV
The internal rectifier senses the long term average signal level
and controls the filter response by setting the control current
of the filter. The rectifier sensitivity, with respect to the input
signal, can be increased by placing the internal preamplifier
(A) before the filter section of the GR581. The preamplifier has
an internal 265 kΩ feedback resistor from its input to output, to
facilitate in setting the gain.
300 µA typical current drain
operates from 1.1 to 3 VDC
preamplifier with 56 dB open loop gain
PACKAGING
An increase of 20 dB above the rectifier threshold will
automatically increase the corner frequency one decade
above the initial corner frequency. The filter will only allow an
increase in corner frequency of one decade, regardless of
further increases in the input signal level.
• 10 pin MICROpac
®
• 10 pin PLID
• Chip (73 x 59 mils)
It is recommended that the attack and release times be set to
30 ms and 90 ms respectively. The average time period of a
speech frame is about 15 ms which is not long enough to
activatethefilter, howeverlongtermaveragenoise, whichcan
have time periods greater than 30 ms, will activate the filter
(providing that the amplitude is above the rectifier threshold).
The GR581 is an improved version of the LS581adaptive high
pass filter and has an identical pinout.
V
B
2
1
V
REG
VREG
10
+
B
B OUT
-
6
A IN
-A
RECTIFIER
10k
265k
5
9
8
3
7
4
RECT
RECT IN GND
A OUT
C
A
C
B
CAP
All resistors in ohms, all capacitors
in farads unless otherwise stated.
FUNCTIONAL BLOCK DIAGRAM
Revision Date: January 2001
Document No. 520 - 60 - 05
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-2814
Gennum Japan Corporation: C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan tel. (03) 3334-7700 fax:(03) 3247-8839
PIN CONNECTIONS
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE
Supply Voltage
3 VDC
25 mW
A OUT
RECT
A IN
Power Dissipation
GND
CAP
Operating Temperature Range
Storage Temperature Range
-10°C to 40°C
-20°C to 70°C
RECT
IN
C
A
V
B
C
B
V
B OUT
REG
CAUTION
CLASS 1 ESD SENSITIVITY
ELECTRICAL CHARACTERISTICS Conditions: Supply Voltage VCC = 1.3 V, Temperature 25oC
PARAMETER
Total Current
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
I
165
300
0.93
2.6
5.6
30
450
µA
T
Voltage Regulator (Pin 1)
V
0.87
0.99
V
REG
DC
NFB 0.2 - 10kHz Filter f set to 0.2kHz
c
-
-
-
-
-
-
-
-
IRN
Input Referred Noise
µVRMS
at 12dB/oct Filter f set to 2kHz
c
Attack Time
t
ms
ms
ATT
Release Time
t
90
RE
L
STAGE A
Quiescent Voltage on pin 5
Open Loop Gain
V
0.49
45
-
0.67
V
Q5
DC
A
R
I
56
265
30
30
-
dB
kΩ
µA
µA
OL
F
Feedback Resistor
Current Sourcing Capacity
Current Sinking Capacity
FILTER SECTION
175
15
355
-
-
SOURCE
I
15
SINK
Quiescent Voltage on pin 3
Quiescent Voltage on pin 4
Quiescent Voltage on pin 8
Quiescent Voltage on pin 9
Filter Insertion Loss
Distortion
V
0.49
0.49
0.55
0.55
-0.5
-
0.58
0.67
0.67
0.78
0.78
1.3
3
V
Q3
DC
V
0.58
V
Q4
Q8
Q9
DC
V
V
-
-
V
DC
V
DC
FIL
V
V
= 850mVRMS f=2kHz (S1 closed)
= 850mVRMS f=1kHz (S1 closed)
= 2.5mVRMS (S2 closed)
0.1
2
dB
%
OUT
THD
OUT
V
5
7
9
AC 2
Rectifier Gain
A
REC
f = 100Hz (Note 1)
= 20mVRMS (S2 closed)
VP9 = 0V
Rectifier Bandwidth
Pin 9 Nominal Current
Current Range
B
R
V
-
4
1.00
10
-
kHz
AC2
I
0.70
8
1.30
12
µA
P9
I
(Note 2, 3)
RANGE
Slope
(Note 2, 4)
0.75
1.7
140
1
1.25
2.8
Rectifier Threshold
Corner Frequency
V
f = 100Hz (Note 2, 5)
(Note 2, 6)
2.5
200
mV
DC
TH
f
260
Hz
c
All Conditions and Parameters remain as show in Test Circuit unless otherwise specified in CONDITIONS Column.
V
- quiescent (unbias) voltage measured on the pin, (nothing connected to the pin). V - actual voltage measured on the pin at given condition ( X is pin number).
QX
PX
NOTES:
1.
2.
A
= 1.9375 x (V / V ) [V = 10mV
] - 0.9375 x (V / V ) [V = 18mV
]
RMS
REC
P4 P3
IN
RMS
I
P4 P3 IN
I
= I [V = 0] ;
= I [ V = V
+ 35mV ; V = 0]
D0
P9 P9
D1
P9
P4
P9 P4
Q4
Q4
P9
I
= I [V = V
+ 85mV ; V = 0];
P9
I
= I [V = V
+ 180mV ; V = 0]
P9
D2
P9 P4
Q4
D3
3.
I
= I
/ I
RANGE
D3 D0
4. SLOPE = ((I
- I
) / 50mV ) x 14kΩ
D2 D1
5.
6.
V
V
= 85mV - ((I
- I ) / SLOPE) x 14kΩ: V
D2 D0
= 85mV + ( 50mV x ( I
- I
) / ( I ));
- I
AL
AH
D3 D2
D2 D1
≤ V [V = 1.7mV
] and V ≥ V [V = 2.8mV
]
P4
AL IN RMS
P4 AL IN RMS
ƒ
= 1 / ( 2 x π x 1.41 x 10nF x R );
R = 26mV x (( 1 / I
) + ( 1 / ( I2 - I
)))
D0
c
D0
I2 = ((3 x ( I
+ I [V
P9 P9
= V
Q9
+ 18mV] )) / ( 4 - (( I
D0
+ I [V = V
+ 18mV] ) / ( I
+ I [V = V
P9 P9
- 18mV] )))
Q9
D0
P9 P9
Q9
D0
520 - 60 - 05
2
V
B
2
0µ1
83k5
1
6
V
REG
LTC1001
0µ1 8k4
10
+
-
B
+
-
V
OUT
V
IN
-A
82k
0µ1
RECTIFIER
10k
265k
10n
5
9
8
3
7
4
2µ2
S2
S1
2µ2
AC1
10n
AC2
All resistors in ohms, all capacitors
in farads unless otherwise stated.
Fig. 1 Test Circuit
5
8
9
180
REGULATOR
2
1
I
BASE
CURRENT
COMP.
265k
10
VIRTUAL
GROUND
6
7
10k
13k5 56k
_
_
3
CONTROL
4
All resistors in ohms, all capacitors
in farads unless otherwise stated.
Fig. 2 Functional Schematic
GR581
V
B
R
2
GP509
MIC
-A
4
3
1
5
2
21k
VREG
0µ1
0µ1 10k
10
6
+
B
-B
-
7
6
R
E
-A
1
8
0µ1
100k
RECTIFIER
10k
265k
5
9
8
3
7
4
10n
10n
2µ2
87
45k
0µ1
All resistors in ohms, all capacitors
in farads unless otherwise stated.
Fig. 3 Typical Hearing Instrument Application
520 - 60 - 05
3
V
B
2
GR581
1
VREG
0µ1
0µ1
10
+
-
OUT
B
IN
3k9
2µ2
10k
6
-A
RECTIFIER
10k
265k
5
9
8
3
7
4
All resistors in ohms, all capacitors
in farads unless otherwise stated.
10n
10n
2µ2
45k
2µ2
Fig. 4 Characterisation Circuit (used to generate typical curves)
-20
-43dBV
-48dBV
-30
-53dBV
-58dBV
-40
-63dBV
-68dBV
-73dBV
-50
-60
-70
100
1000
10000
FREQUENCY (Hz)
Fig. 5 Frequency Response
DOCUMENT
IDENTIFICATION
PRODUCT PROPOSAL
This data has been compiled for market investigation purposes
only, and does not constitute an offer for sale.
ADVANCE INFORMATION NOTE
This product is in a development phase and specifications are
subject to change without notice. Gennum reserves the right to
remove the product at any time. Listing the product does not
constitute an offer for sale.
PRELIMINARY DATA SHEET
The product is in a preproduction phase and specifications are
subject to change without notice.
REVISION NOTES
DATA SHEET
The product is in production. Gennum reserves the right to make
changes at any time to improve reliability, function or design, in
order to provide the best product possible.
Changes to standard packaging information.
Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
© Copyright August 1992 Gennum Corporation. All rights reserved. Printed in Canada.
520 - 60 - 05
4
相关型号：
©2020 ICPDF网 联系我们和版权申明