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The MAX405 high-speed, precision buffer amplifier
guarantees a minimum gain ..
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MAX405CPA
Precision Video Buffer Amplifier
19-3819; Rev 1; 5/96
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Precision Video Buffer Amplifier
General Description
The MAX405 high-speed, precision buffer amplifier
guarantees a minimum gain of 0.99V/V over -40''C to
+85''C, with loads as low as 509. It operates from
15V power supplies and drives i3V signals into 50n
loads, or i2.25V into four 1509 loads. The MAX405
features 180MHz bandwidth, 650V/ps slew rate, and
35ns settling time to 0.1%. Precision characteristics
include 0.01" differential phase, 0.03% differential
gain, and guaranteed 0.1% nonlinearity over tempera-
ture, Unlike other buffer amplifiers, the MAX405's in-
verting input can be used to increase the gain.
The MAX405 is ideal as a 50n and 759 coaxial cable
driver for color video signals. Guaranteed 60mA
continuous output current eliminates the need for
multiple buffers, external power-booster circuits, or
expensive hybrid modules common in video distribu-
tion applications. Greater PC-layout densities are
provided by compact 8-pin DIP and SO packages.
Applications
Video Distribution
Flash A/D Input Buffers
Coaxial Line Drivers
Fast Sample-and-Hold Buffers
Typical Application Circuit
Ir, F I at
I u T CEHAMIC
MAX405
AN- r- - J - Cr- 4N
V - 1 F on
cdligt T, IPF l u; u CL (lzlh',a,
Features E
. 0.99VN Min DC Gain (RI. = tion) Over Temp ts
. thm'' Differential Phase tt
. 0.03% Dlfferential Gain a
t 0.1% Nonllnearlty Over Temperature Ct
. 180MHz Bandwidth ttt
. 650V/us Slew Rate
. 60mA Continuous Output Current
. 0.019 Hour
. 0.6pF Input Capacitance
. Drives Four150§2 Loads
. Adjustable Gain Control
Ordering Information
L] Ta, TEMP. RANGE PIN-PEAGE
' MAX405CPA 0'c to not a Plastic DIP
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[Exmscm -Ltto_+7_0''(_:) : Crick
MAX405EPA 44030 +85'C_ _8 PlisticDi
MAX405ESA__ c42'c_to_+8_CC - 8 so
'Contact factory for dice specifications.
Pin Configuration
TOP VIEW
om E k vc+
IN+ E MAXIM m Vc-
IN- E MAX405 E l/r
V» E 5 NULL
DlP/SO
Maxim Integrated Products 1
& the latest literature: http://www.maxIm-ic.com,
MAX405
Precision Video Buffer Amplifier
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V+ to V-) ..................... 12V
Voltage at Any Pin ............... (V- -0.3V) to (V+ +0.3V)
Output Current (IOUT) ........................... 250mA
Short-Circuit Duration (low) ..................... 10 sec
Continuous Power Dissipation
Operating Temperature Ranges:
MAX4OSC_ A ......................... CC to +70°C
MAX405E_ A ......................... -40°C to +85°C
Storage Temperature Range ............. -65''C to +160''C
Lead Temperature (soldering, 10 sec) ............ +300°C
Plastic DIP (derate 8.3mW/‘C above +70''C) P.....
SO (derate 6mW/°C above +70°C) ..............
Stresses trg', those listed under 'Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and Iunctional
operation 0 the device at these or any other conditions beyond those indicated in the operational sections of the specifications IS not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V+ = Vc+ = 5V, V- = Vc- = -5V, RL = son, Ct = 15pF, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS " = o25'C " = TMIN to TMAX UNITS
MIN TYP MAX MIN TYP MAX
_ Unadjusted 0.9910 0.9940 1 0.9900 1
Voltage Gain Av ' VN
Adjusted 1.1 1.1
-5.0 $2.0 5.0
Offset Voltage Vos TA = 0°C to +70''C ~65 6.5 mV
- TA = M0"C to +85°c -8.0 8.0
Offset Voltage TC TCVos 25 'su/T
Input Bias Current IBUNH VIN = 0V d 2 -4 4 pA
(IN-) 10 _ P
Input Resistance RIN 2.5 Mn
InputCapacitance CIN 0.6 pF
Output Voltage Swing VOUT -3.0 13.4 3.0 -3.0 3.0 V
- Continuous 60 60
OutputCurrent IOUT _ _ mA
Short-circuit(Note I) 90 180 90 180
Output Impedance ROUT At DC 0.01 n
Power-Supply Rejection Ratio PSRR AVs = i5% 48 54 47 dB
WN signal -1.5 $1.0 IS
Nonlinearity (Note 2) TA = 0°C to +70''C -2.0 2.0 mV
TA = -40"C to +85°C -2.5 2.5
Supply Voltage (Note 3) V+, V- 14.75 e, $5.25 14.75 15 $5.25 V
Supply Current (Note 3) IO V+, V- = WN A35 t40 i43 mA
AC SPECtF1CATT0NS(NOTE 1)
-3dB Bandwidth BW VIN = IVRMS 125 180 110 MHz
Full-Power Bandwidth FPBW VoUT = 6Vp-p 24 34 18 MHz
Slew Rate SR VOUT = 3V step 450 650 350 V/ps
Settling Time ts t = 0.1%. VOUT = 3V step 35 50 70 ns
Rise/Fall Time IR/F VOUT = 3V step 8 12 16 ns
Differential Phase 0.01 7
Differential Gain 0.03 %
Note 1: Guaranteed by design.
Note 2: Nonlinearity is deviation from end-point line.
Note 3: Vc+ = V, Vc- = V-. Current is for both supply pins.
2 MAXIM
