Datasheet

MAX2065
50MHz to 1000MHz High-Linearity, Serial/
Parallel-Controlled Analog/Digital VGA
18 ______________________________________________________________________________________
Pin Description
PIN NAME DESCRIPTION
1, 16, 19, 22,
24–28, 30,
31, 33–36
GND Ground
2 VREF_SELECT
DAC Reference Voltage Selection Logic Input. Logic 1 = internal DAC reference voltage,
Log i c 0 = exter nal D AC r efer ence vol tag e. Log i c i np ut d i sab l ed ( d on’ t car e) w hen V D AC _E N = Log i c 0.
3 VDAC_EN DAC Enable/Disable Logic Input. Logic 0 = disable DAC circuit, Logic 1 = enable DAC circuit.
4 DATA SPI Data Digital Input
5 CLK SPI Clock Digital Input
6 CS SPI Chip-Select Digital Input
7 VDD_LOGIC Digital Logic Supply Input
8 SER/PAR
Digital Attenuator SPI or Parallel Control Selection Logic Input. Logic 0 = parallel control,
Logic 1 = serial control.
9 STATE_A Digital Attenuator Preprogrammed Attenuation State Logic Input
State A State B Digital Attenuator
Logic = 0 Logic = 0 Preprogrammed State 1
Logic = 1 Logic = 0 Preprogrammed State 2
Logic = 0 Logic = 1 Preprogrammed State 3
10 STATE_B
Logic = 1 Logic = 1 Preprogrammed State 4
11 D4 16dB Attenuator Logic Input. Logic 0 = disable, Logic 1 = enable.
12 D3 8dB Attenuator Logic Input. Logic 0 = disable, Logic 1 = enable.
13 D2 4dB Attenuator Logic Input. Logic 0 = disable, Logic 1 = enable.
14 D1 2dB Attenuator Logic Input. Logic 0 = disable, Logic 1 = enable.
15 D0 1dB Attenuator Logic Input. Logic 0 = disable, Logic 1 = enable.
17 AMP_OUT Driver Amplifier Output (50Ω)
18 RSET Driver Amplifier Bias-Setting. See the External Bias section.
20 AMP_IN Driver Amplifier Input (50Ω)
21 VC C _AMP Driver Amplifier Supply Voltage Input
23 ATTEN2_OUT 5-Bit Digital Attenuator Output (50Ω)
29 ATTEN2_IN 5-Bit Digital Attenuator Input (50Ω)
32 ATTEN1_OUT Analog Attenuator Output (50Ω)
37 ATTEN1_IN Analog Attenuator Input (50Ω)
38 VC C _ANALOG Analog Bias and Control Supply Voltage Input
39 AN ALOG_V C TRL Analog Attenuator Voltage Control Input
40 VREF_IN External DAC Voltage Reference Input
—EP
E xp osed P ad . Inter nal l y connected to GN D . C onnect E P to GN D for p r op er RF p er for m ance and
enhanced ther m al d i ssi p ati on.