MAX2670
GPS/GNSS Front-End Amplifier
Pin Configuration
TOP VIEW
+
RFIN2
1
10 RFOUT1
GND
2
9
GND
GND
EXTCAP/ALT_VCC
RFOUT2/VCC
3
4
5
MAX2670
EP
8
7
6
GND
GAIN_SELECT
RFIN1
TDFN
Pin Description
PIN
1
2, 3, 8, 9
4
5
6
7
10
EP
NAME
RFIN2
GND
EXTCAP/ALT_VCC
RFOUT2/VCC
RFIN1
GAIN_SELECT
RFOUT1
FUNCTION
Amplifier 2 Input. Incorporates an internal DC-blocking capacitor and is internally matched to
50 I . This input is designed to be connected to a bandpass filter.
Electrical Ground
External Smoothing Capacitor for Internal Supply Voltage or Can Be Used as the External DC
Supply Pin to Eliminate the Need for a Bias-T on RFOUT2/VCC.
Amplifier 2 Output. Incorporates an internal DC-blocking capacitor and is internally matched to
50 I . DC bias on this pin serves as the power supply through a bias-T.
Amplifier 1 Input. Requires external DC-blocking capacitor and matching components.
AMP 2 Gain Select. Open is high-gain mode. Short to ground is low-gain mode.
Amplifier 1 Output. Incorporates an internal DC-blocking capacitor and is internally matched to
50 I . This output is designed to drive a bandpass filter.
Exposed Pad Ground. The exposed pad must be soldered to the circuit board for proper thermal
and electrical performance.
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