Texas Instruments TRF3701, User Manual

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Circuit Function
3-3 Circuit Description
Table 3 - 1. Power Supply J1
J1 Pin Description
1 5 V (V
CC
), U1 analog supply
2 7 V, op amp supply
3 AGND
4 - 7 V, op amp supply
Connectors J6 and J13 are used to supply the dc bias voltage to U1 I/Q input
channels. Both connectors are a 3-position male Molex header (part number
8610903).
Table 3 - 2. CM Bias Voltage
J6 Pin Description
1 QREF1, QREF2 (VCM = 3.7 Vdc)
2 AGND
3 IREF1, IREF2 (VCM = 3.7 Vdc)
Table 3 - 3. CM Bias Voltages via Op Amp
J13 Pin Description
1 VCOM2 (VCM = 3.7 Vdc)
2 AGND
3 VCOM1 (VCM = 3.7 Vdc)