MAX2062ETM+ Maxim Integrated Products, MAX2062ETM+ Datasheet - Page 18

• Manufacturer Part Number: MAX2062ETM+
• Description: RF Amplifier DL 50-1000MHZ HI-LIN SER/PARALLEL ANALOG
• Manufacturer: Maxim Integrated Products

Specifications of MAX2062ETM+

• Bandwidth: 50 MHz to 1000 MHz
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 5 V
• Supply Current: 148 mA
• Maximum Power Dissipation: 5.3 W
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: TQFN-48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Dual 50MHz to 1000MHz High-Linearity,
Serial/Parallel-Controlled Analog/Digital VGA
Table 1. Control Logic
Each path of the device includes a high-performance
driver with a fixed gain of 24dB. The driver amplifier
circuits are optimized for high linearity for the 50MHz to
1000MHz frequency range.
The device features an optional +3.3V supply volt-
age operation with reduced linearity performance. The
AMPSET pin needs to be biased accordingly in each
mode, as listed in Table 2. In addition, the driver amplifiers
can be shut down independently to conserve DC power.
See the biasing scheme outlined in Table 2 for details.
The digital attenuators can be programmed through
the 3-wire SPI/MICROWIRE
using 5-bit words. Fifty-six bits of data are shifted in
MSB first and are framed by CS. The first 28 bits set the
first attenuator and the following 28 bits set the second
attenuator. When CS is low, the clock is active and data
is shifted on the rising edge of the clock. When CS transi-
tions high, the data is latched and the attenuator setting
changes (Figure 1). See Table 3 for details on the SPI
data format.
Table 2. Operating Modes
MICROWIRE is a registered trademark of National
Semiconductor Corp.
18
RESULT
AMP1 off
AMP2 on
AMP1 on
AMP2 off
AA_SP
DA_SP
All on
All off
_____________________________________________________________________________________
0
1
0
1
SPI Interface and Attenuator Settings
Controlled by external control voltage
Controlled by on-chip DAC
Parallel controlled
SPI controlled (control voltages show up on the parallel control pins)
V
CC
Applications Information
3.3
3.3
3.3
3.3
5
5
5
5
(V)
AMPSET
®
ANALOG ATTENUATOR
0
1
0
1
0
1
0
1
-compatible serial interface
Operating Modes
Driver Amplifier
PD_1
0
0
1
1
0
0
1
1
PD_2
0
0
0
0
1
1
1
1
DIGITAL ATTENUATOR
D0:D7
D8:D12
D13:D17
D18:D22
D23:D27
D28:D35
D36:D40
D41:D45
D46:D50
D51:D55
Disabled
Enabled (DAC output voltage shows on A_VCTL__ pins);
DAC uses on-chip voltage reference
Path 1 DAC and Digital Attenuator Programming
Path 2 DAC and Digital Attenuator Programming
Sent to DAC register
D28 = LSB, D35 = MSB
Preprogrammed Attenuation State 1
D36 = 1dB bit, D37 = 2dB bit, D38 = 4dB
bit, D39 = 8dB bit, D40 = 16dB bit
Preprogrammed Attenuation State 2
D41 = 1dB bit, D42 = 2dB bit, D43 = 4dB
bit, D44 = 8dB bit, D45 = 16dB bit
Preprogrammed Attenuation State 3
D46 = 1dB bit, D47 = 2dB bit, D48 = 4dB
bit, D49 = 8dB bit, D50 = 16dB bit
Preprogrammed Attenuation State 4
D51 = 1dB bit, D52 = 2dB bit, D53 = 4dB
bit, D54 = 8dB bit, D55 = 16dB bit
Sent to DAC register
D0 = LSB, D7 = MSB
Preprogrammed Attenuation State 1
D8 = 1dB bit, D9 = 2dB Bit, D10 = 4dB bit,
D11 = 8dB bit, D12 = 16dB bit
Preprogrammed Attenuation State 2
D13 = 1dB bit, D14 = 2dB bit, D15 = 4dB
bit, D16 = 8dB bit, D17 = 16dB bit
Preprogrammed Attenuation State 3
D18 = 1dB bit, D19 = 2dB bit, D20 = 4dB
bit, D21 = 8dB bit, D22 = 16dB bit
Preprogrammed Attenuation State 4
D23 = 1dB bit, D24 = 2dB bit, D25 = 4dB
bit, D26 = 8dB bit, D27 = 16dB bit
D/A CONVERTER