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參數(shù)資料
| 型號(hào)： | TDA8780M |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | True logarithmic amplifier |
| 中文描述： | LOG OR ANTILOG AMPLIFIER, 14 MHz BAND WIDTH, PDSO20 |
| 封裝： | 4.40 MM, PLASTIC, SOT-266-1, SSOP-20 |
| 文件頁數(shù)： | 2/16頁 |
| 文件大小： | 70K |
| 代理商： | TDA8780M |
1995 Jul 25
2
Philips Semiconductors
Product specification
True logarithmic amplifier
TDA8780M
FEATURES
72 dB true logarithmic dynamic range
Small-signal gain-adjustment facility
Constant limiting output voltage
Temperature and DC power supply voltage independent
Easy interfacing to analog-to-digital converters
Output DC level shift facility.
APPLICATIONS
Dynamic range compression
IF signal dynamic range reduction in digital receivers
Compression receivers.
GENERAL DESCRIPTION
The TDA8780M is a true logarithmic amplifier intended for
dynamic range reduction of IF signals at 10.7 MHz in
digital radio receivers. It offers true logarithmic
characteristics over a 72 dB input dynamic range, has a
small-signal gain-adjustment facility and a constant
limiting output voltage for large input levels.
A unique feature is the smooth “changeover” from linear
operation (inputs less than 60
μ
V) to logarithmic mode.
The device is manufactured in an advanced BiCMOS
process which enables high performance being obtained
with low DC power supply consumption. The true
logarithmic amplifier can be driven by single-ended or
differential inputs. The DC operating point is set by overall
on-chip feedback decoupled by two off-chip capacitors,
which define the low-frequency cut-off point.
The performance of the amplifier is stabilized against
temperature and DC power supply variations. The
differential output is converted internally to a single-ended
output by an on-chip operational amplifier arrangement in
which the DC output level is set by an externally-supplied
reference voltage. A power-down facility allows the circuit
to be disabled from a control input.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
V
P
I
P
I
P(PD)
f
in
V
in(M)
T
amb
supply voltage
supply current
supply current in power-down mode
operating input frequency
dynamic logarithmic input voltage (peak value)
operating ambient temperature
4.5
0.06
20
5.0
5.5
6.7
250
15
300
+75
V
mA
μ
A
MHz
mV
°
C
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8780M
SSOP20
plastic shrink small outline package; 20 leads; body width 4.4 mm
SOT266-1
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參數(shù)描述 |
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| TDA8781 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| TDA8783 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:40 Msps, 10-bit analog-to-digital interface for CCD cameras |
| TDA8783H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:40 Msps, 10-bit analog-to-digital interface for CCD cameras |
| TDA8783HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:40 Msps, 10-bit analog-to-digital interface for CCD cameras |
| TDA8783HL/C4,118 | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 10-BITS CCD 40MSPS 5V ADC RoHS:否 制造商:Texas Instruments 輸入信號(hào)類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結(jié)構(gòu): 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
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