Ampli bajo ruido

a
FEATURES Ideal for Video Applications 0.02% Differential Gain 0.04 Differential Phase 0.1 dB Bandwidth to 25 MHz (G = +2) High Speed 90 MHz Bandwidth (–3 dB) 500 V/ s Slew Rate 60 ns Settling Time to 0.1% (VO = 10 V Step) Low Noise 2.9 nV/√Hz Input Voltage Noise Low Power 6.8 mA Supply Current 2.1 mA Supply Current (Power-Down Mode) High Performance Disable Function Turn-Off Time of 100 nsInput to Output Isolation of 54 dB (Off State) PRODUCT DESCRIPTION
BAL –IN +IN V–
1 2 3 4

Improved Second Source to the EL2020 ADEL2020
CONNECTION DIAGRAMS 8-Pin Plastic Mini-DIP (N)
DISABLE V+ OUTPUT BAL

20-Pin Small Outline Package
1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13

8 7 6

NC BAL NC –IN NC +IN NC V– NC NC

NC DISABLE NC V+ NC OUTPUT NC BAL NC NC

ADEL2020
TOP VIEW5

ADEL2020
TOP VIEW

12 11

NC = NO CONNECT

The ADEL2020 is an improved second source to the EL2020. This op amp improves on all the key dynamic specifications while offering lower power and lower cost. The ADEL2020 offers 50% more bandwidth and gain flatness of 0.1 dB to beyond 25 MHz. In addition, differential gain and phase are less than 0.05% and 0.05° while driving one backterminated cable (150 Ω). The ADEL2020 offers other significant improvements. The most important of these is lower power supply current, 33% less
+0.1 0
NORMALIZED GAIN – dB

than the competition while offering higher output drive. Important specs like voltage noise and offset voltage are less than half of those for the EL2020. The ADEL2020 also features an improved disable feature. The disable time(to high output impedance) is 100 ns with guaranteed break before make. Finally the ADEL2020 is offered in the industrial temperature range of –40°C to +85°C in both plastic DIP and SOIC package.
0.10 0.20 GAIN = +2 RF = 750 Ω RL = 150 Ω fC = 3.58MHz 100 IRE MODULATED RAMP 0.18 0.16 0.14 0.12 0.10 GAIN PHASE 0.08 0.06 0.04 0.02 0 15

RL = 150 Ω ±15V ±5V

0.09

–0.1

DIFFERENTIAL GAIN – %0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 5 6 7

+0.1 RL= 1k 0 –0.1 ±15V ±5V

100k

1M

10M FREQUENCY – Hz

100M

8 9 10 11 12 SUPPLY VOLTAGE – ± Volts

13

14

Fine-Scale Gain (Normalized) vs. Frequency for Various Supply Voltages. RF = 750 Ω, Gain = +2

Differential Gain and Phase vs. Supply Voltage

REV. A
Information furnished by Analog Devices is believed to beaccurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703DIFFERENTIAL PHASE – Degrees

ADEL2020–SPECIFICATIONS (@ T = +25 C and V =
A S

15 V dc, RL = 150 Ω unless otherwise noted)
Min ADEL2020A Typ Max Units

Parameter

Conditions

Temperature

INPUT OFFSET VOLTAGE TMIN–TMAX Offset Voltage Drift COMMON-MODE REJECTION VOS ± Input Current POWER SUPPLY REJECTION VOS ± Input Current INPUT BIAS CURRENT INPUT CHARACTERISTICS +Input Resistance–Input Resistance +Input Capacitance OPEN-LOOP TRANSRESISTANCE OPEN-LOOP DC VOLTAGE GAIN OUTPUT VOLTAGE SWING Short-Circuit Current Output Current POWER SUPPLY Operating Range Quiescent Current Power-Down Current Disable Pin Current Min Disable Pin Current to Disable DYNAMIC PERFORMANCE 3 dB Bandwidth VO = ± 10 V RL = 400 Ω RL = 400 Ω, VOUT = ± 10 V RL = 100 Ω, VOUT = ± 2.5 V RL = 400 Ω TMIN–TMAXTMIN–TMAX TMIN–TMAX TMIN–TMAX TMIN–TMAX VCM = ± 10 V TMIN–TMAX TMIN–TMAX VS = ± 4.5 V to ± 18 V TMIN–TMAX TMIN–TMAX –Input +Input TMIN–TMAX TMIN–TMAX 1 65 50

1.5 2.0 7 64 0.1 72 0.05 0.5 1 10 40 2 3.5 100 88 ± 13.0 150 60

7.5 10.0

mV mV µV/°C dB µA/V dB µA/V µA µA MΩ Ω pF MΩ dB dB V mA mA

1.0

0.5 7.5 15

1 80 76 ± 12.0 30 ± 3.0

Disable Pin = 0 V

TMIN–TMAX TMIN–TMAX...