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PDF MAX4117ESA Data sheet ( Hoja de datos )
| Número de pieza | MAX4117ESA | |
| Descripción | Single/Dual/Quad / 400MHz / Low-Power / Current Feedback Amplifiers | |
| Fabricantes | Maxim Integrated | |
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19-0440; Rev 2; 4/97
EVAALVUAAILTAIOBNLEKIT
Single/Dual/Quad, 400MHz, Low-Power,
Current Feedback Amplifiers
_______________General Description
The single MAX4112/MAX4113, dual MAX4117/
MAX4118, and quad MAX4119/MAX4120 current feed-
back amplifiers combine high-speed performance with
low-power operation. The MAX4112/MAX4117/
MAX4119 are optimized for closed-loop gains of 2V/V
or greater, while the MAX4113/MAX4118/MAX4120 are
optimized for gains of 8V/V or greater.
The MAX4112/MAX4117/MAX4119 and the MAX4113/
MAX4118/MAX4120 require only 5mA of supply current
per channel, and deliver 0.1dB gain flatness up to 115MHz
and -3db bandwidths of 400MHz (AV ≥ 2V/V) and 300MHz
(AV ≥ 8V/V), respectively. Their high slew rates of up to
1800V/µs provide exceptional full-power bandwidths up
to 280MHz, making these amplifiers ideal for high-per-
formance pulse and RGB video applications.
These high-speed op amps have a wide output voltage
swing of ±3.5V into 100Ω and a high current-drive
capability of 80mA.
________________________Applications
Broadcast and High-Definition TV Systems
RGB Video
Pulse/RF Amplifier
Ultrasound/Medical Imaging
Active Filters
High-Speed ADC Buffers
Professional Cameras
High-Definition Surveillance
____________________________Features
o 400MHz -3dB Bandwidth (MAX4112/MAX4117)
270MHz -3dB Bandwidth (MAX4113/MAX4119)
300MHz -3dB Bandwidth (MAX4118/MAX4120)
o 0.1dB Gain Flatness to 115MHz
o 1200V/µs Slew Rate
(MAX4112/MAX4117/MAX4119)
1800V/µs Slew Rate
(MAX4113/MAX4118/MAX4120)
o 280MHz Full-Power Bandwidth
(VO = 2Vp-p, MAX4112/MAX4117)
240MHz Full-Power Bandwidth
(VO = 2Vp-p, MAX4113/MAX4118/MAX4120)
o High Output Drive: 80mA
o Low Power: 5mA Supply Current per Channel
______________Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX4112ESA
-40°C to +85°C 8 SO
MAX4112EUA
-40°C to +85°C 8 µMAX*
MAX4113ESA
-40°C to +85°C 8 SO
MAX4117ESA
-40°C to +85°C 8 SO
MAX4118ESA
-40°C to +85°C 8 SO
Ordering Information continued at end of data sheet.
*Contact factory for µMAX package availability.
__________________________________________________________Pin Configurations
TOP VIEW
N.C. 1
IN- 2
IN+ 3
VEE 4
MAX4112
MAX4113
8 N.C. OUTA 1
7 VCC INA- 2
6 OUT INA+ 3
5 N.C. VEE 4
SO/µMAX
MAX4117
MAX4118
SO
8 VCC OUTA 1
7 OUTB INA- 2
INA+ 3
6 INB-
VCC 4
5 INB+ INB+ 5
INB- 6
OUTB 7
MAX4119
MAX4120
SO
14 OUTD OUTA 1
13 IND- INA- 2
12 IND+ INA+ 3
11 VEE
10 INC+
VCC 4
INB+ 5
9 INC- INB- 6
8 OUTC OUTB 7
N.C. 8
MAX4119
MAX4120
QSOP
16 OUTD
15 IND-
14 IND+
13 VEE
12 INC+
11 INC-
10 OUTC
9 N.C.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
1 page  
Single/Dual/Quad, 400MHz, Low-Power,
Current Feedback Amplifiers
____________________________Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, RF = 499Ω, RL = 100Ω, TA = +25°C, unless otherwise noted.)
MAX4112/MAX4117/MAX4119
LARGE-SIGNAL PULSE RESPONSE
(AVCL = +10)
MAX4112/MAX4117/MAX4119
SMALL-SIGNAL PULSE RESPONSE
(AVCL = +2, CL = 10pF)
MAX4113/MAX4118/MAX4120
SMALL-SIGNAL PULSE RESPONSE
(AVCL = +8)
IN GND IN
GND IN
GND
OUT GND OUT
OUT
GND
GND
TIME (10ns/div)
MAX4113/MAX4118/MAX4120
SMALL-SIGNAL PULSE RESPONSE
(AVCL = +20)
TIME (10ns/div)
MAX4113/MAX4118/MAX4120
LARGE-SIGNAL PULSE RESPONSE
(AVCL = +8)
TIME (10ns/div)
MAX4113/MAX4118/MAX4120
LARGE-SIGNAL PULSE RESPONSE
(AVCL = +20)
IN GND IN GND IN GND
OUT
OUT
GND
GND OUT
GND
TIME (10ns/div)
MAX4112/MAX4117/MAX4119
SETTLING TIME vs. GAIN
30
20
10
0
2 4 6 8 10
GAIN (V/V)
TIME (10ns/div)
MAX4113/MAX4118/MAX4120
SETTLING TIME vs. GAIN
40
35
30
25
20
15
10
8 16 24 32 40 48 56
GAIN (V/V)
TIME (10ns/div)
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
0.1
MAX4117–MAX4120
CROSSTALK vs. FREQUENCY
1 10
FREQUENCY (MHz)
100
_______________________________________________________________________________________ 5
5 Page 
Single/Dual/Quad, 400MHz, Low-Power,
Current Feedback Amplifiers
MAX4112
MAX4113
MAX4117
MAX4118
MAX4119
MAX4120
RG
IB-
IB+
RS
RF
VOUT
Figure 3. Output Offset Voltage
Choosing Feedback and Gain Resistors
The MAX4112/MAX4113/MAX4117–MAX4120 are cur-
rent feedback amplifiers. Increasing feedback resistor
values will decrease peaking. Use the input resistor
(RG) to change the magnitude of the gain. Figure 2
shows the standard inverting and noninverting configu-
rations. Notice that the gain of the noninverting circuit
(Figure 2b) is 1 plus the magnitude of the inverting
closed-loop gain (Table 1).
DC and Noise Errors
There are several major error sources to consider in
any operational amplifier. These apply equally to the
MAX4112/MAX4113/MAX4117–MAX4120. Offset-error
terms are given by the equation below. Voltage and
current-noise errors are root-square summed and
therefore computed separately. In Figure 3, the total
output offset voltage is determined by:
a) The input offset voltage (VOS) times the closed-loop
gain (1 + (RF / RG)).
b) The positive input bias current (IB+) times the source
resistor (RS) (usually 50Ω or 75Ω), plus the negative
input bias current (IB-) times the parallel combination
of RG and RF. In current-mode feedback amplifiers,
the input bias currents may flow into or out of the
device. For this reason, there is no benefit to match-
ing the resistance at both inputs.
The equation for total DC error is:
[ ( ) ]( ) ( )VOUT
=
IB+ RS + IB−
RF || RG + VOS
1+
RF
RG
c) The total output-referred noise voltage is:
[ ] [ ]( ) ( ) ( )en(OUT)
=
1+
RF
RG
2
in+ RS +
in− RF || RG 2 + en 2
The MAX4112/MAX4117/MAX4119 have a very low,
2nV/√Hz noise voltage. The current noise at the positive
input (in+) is 13pA/√Hz, and the current noise at the
inverting input (in-) is 14pA/√Hz.
An example of the DC error calculations, using the
MAX4112 typical data and the typical operating circuit
where RF = RG = 600Ω (RF || RG = 300Ω) and RS = 50Ω,
gives the following:
VOUT = (3.5 x 10-6 x 50 + 3.5 x 10-6 x 300 + 10-3) (1 + 1)
VOUT = 4.45mV
Calculating total output noise in a similar manner yields:
( ) ( ) ( )( )en(OUT) = 1+1 13x10−12 x50 2 + 14x10−12 x300 2 + 2x10−9 2
en(OUT) = 9.4nV/ Hz
With a 200MHz system bandwidth, this calculates to
133µVRMS (approximately 797µVp-p, choosing the six-
sigma value).
Resistor Types
Surface-mount resistors are the best choice for high-
frequency circuits. They are of similar material to metal-
film resistors, but are deposited using a thick-film
process in a flat, linear manner that minimizes induc-
tance. Their small size and lack of leads also minimizes
parasitic inductance and capacitance, yielding more
predictable performance.
Metal-film resistors with leads are manufactured using
a thin-film process where resistive material is deposited
in a spiral layer around a ceramic rod. Although the
materials used are noninductive, the spiral winding pre-
sents a small inductance (about 5nH) that may have an
adverse effect on high-frequency circuits.
Carbon-composition resistors with leads are manufac-
tured by pouring the resistor material into a mold. This
process yields relatively low-inductance resistors that
are very useful in high-frequency applications, although
they tend to cost more and have more thermal noise
than other types. The ability of carbon-composition
resistors to self-heal after a large current overload
makes them useful in high-power RF applications.
For general-purpose use, surface-mount metal-film
resistors seem to have the best overall performance for
low cost, low inductance, and low noise.
Video Line Driver
The MAX4112/MAX4113/MAX4117–MAX4120 are opti-
mized (gain flatness) to drive coaxial transmission lines
when the cable is terminated at both ends, as shown in
Figure 4. Cable frequency response can cause varia-
tions in the flatness of the signal.
______________________________________________________________________________________ 11
11 Page | ||
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| PDF Descargar | [ Datasheet MAX4117ESA.PDF ] | |
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