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부품번호 | TEA0676 기능 |
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기능 | Dual pre-amplifier and equalizer for reverse tape decks | ||
제조업체 | NXP Semiconductors | ||
로고 | |||
전체 20 페이지수
INTEGRATED CIRCUITS
DATA SHEET
TEA0676T
Dual pre-amplifier and equalizer for
reverse tape decks
Product specification
Supersedes data of 1996 Jun 20
File under Integrated Circuits, IC01
1997 Oct 07
Philips Semiconductors
Dual pre-amplifier and equalizer for
reverse tape decks
Product specification
TEA0676T
PINNING
SYMBOL
OUTA
n.c.
EQOUTA
EQINA
VCC
INA1
Vref
INA2
INB2
HSW
INB1
GND
EQINB
EQOUTB
EQSW
OUTB
PIN DESCRIPTION
1 output channel A
2 not connected
3 output equalizer channel A
4 input equalizer channel A
5 supply voltage
6 input channel A1
(forward or reverse)
7 reference voltage
8 input channel A2
(reverse or forward)
9 input channel B2
(reverse or forward)
10 input head switch
11 input channel B1
(forward or reverse)
12 ground
13 input equalizer channel B
14 output equalizer channel B
15 input equalizer switch
16 output channel B
FUNCTIONAL DESCRIPTION
Gain of pre-amplifier = 30 dB; minimum gain of
EQ-amplifier = 24.5 dB at f = 1 kHz with 70 µs cut-off
frequency.
Head switching is achieved when pin 10 (HSW) is
connected to ground via a 27 kΩ resistor (inputs INA2,
handbook, halfpage
OUTA 1
16 OUTB
n.c. 2
15 EQSW
EQOUTA 3
14 EQOUTB
EQINA 4
13 EQINB
TEA0676T
VCC 5
12 GND
INA1 6
11 INB1
Vref 7
10 HSW
INA2 8
9 INB2
MGE861
Fig.2 Pin configuration.
INB2 are active) or connected to HIGH level (0.8VCC)
(inputs INA1, INB1 are active).
Equalization time constant switching (70 µs/120 µs) is
achieved when pin 15 (EQSW) is connected to ground via
an 18 kΩ resistor (120 µs) or left open-circuit (70 µs).
1997 Oct 07
4
4페이지 Philips Semiconductors
Dual pre-amplifier and equalizer for
reverse tape decks
Product specification
TEA0676T
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
Switching thresholds
EQUALIZATION TIME CONSTANT SWITCHING
VEQSW
pin voltage
IEQSW
input current
VEQSW(HIGH) pin voltage
VEQSW(LOW) pin voltage
load current +100 to −100 µA
VEQSW = 0 to VCC
time constant 70 µs active
time constant 120 µs active
−
−180
1⁄2VCC + 0.5
0
0.8VCC
−
−
−
−
+180
VCC
1⁄2VCC − 0.5
V
µA
V
V
HEAD SWITCHING
VHSW
IHSW
VHSW(HIGH)
VHSW(LOW)
pin voltage
input current
HIGH-level pin voltage
LOW-level pin voltage
load current +90 to −90 µA
VHSW = 0 to VCC
inputs INA1 and INB1 active
inputs INA2 and INB2 active
−
−170
1⁄2VCC + 0.5
0
0.8VCC
−
−
−
−
+170
VCC
1⁄2VCC − 0.5
V
µA
V
V
Notes
1. For an application with a fixed equalization time constant of 120 µs the equalizing network may be applied completely
external. In this application the 8.2 kΩ resistor has to be changed to 14 kΩ and the internal resistor REQ = 5.8 kΩ
must be short-circuited by fixing the equalization switch input at 70 µs (pin 15 left open-circuit). To activate the inputs
INA1 and INB1, pin 10 (HSW) might be left open-circuit. In this event the DC level at pin 10 (HSW) is 0.8VCC
2. It is recommended to switch off VCC with a gradient of 400 V/s at maximum to avoid plops on the tape in the event
of contact between tape and tape head while switching off.
1997 Oct 07
7
7페이지 | |||
구 성 | 총 20 페이지수 | ||
다운로드 | [ TEA0676.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |