RFDA0035 Datasheet, PDF (8/11 Pages) RF Micro Devices – DIGITAL CONTROLLED IF DUAL VGA 5 BIT 1dB LSB CONTROL

RFDA0035
Pin Names and Descriptions
Pin
Function Description
1
A2
MSB - 2 for the Gain Control Interface for Channel A.
2
A3
MSB - 1 for the Gain Control Interface for Channel A.
3
A4
MSB for the 5-Bit Gain Control Interface for Channel A.
4
VCMA
Channel A Input Common-Mode Voltage. Typically Bypassed to Ground Through Capacitor.
5
VCMB
Channel B Input Common-Mode Voltage. Typically Bypassed to Ground Through Capacitor.
6
B4
MSB for the 5-Bit Gain Control Interface for Channel B.
7
B3
MSB - 1 for the Gain Control Interface for Channel B.
8
B2
MSB - 2 for the Gain Control Interface for Channel B.
9
B1
LSB + 1 for the Gain Control Interface for Channel B.
10
B0
LSB for the Gain Control Interface for Channel B.
11
IPB+
Channel B Positive Input.
12
IPB-
Channel B Negative Input.
13
GNDB
Device Common (DC Ground) for Channel B.
14
VCCB
Positive Supply Pin for Channel B. Should be Bypassed to Ground Using Suitable Bypass Capacitor.
15
0PB+
Positive Output Pins (Open Collector) for Channel B. Require DC Bias of +5V Nominal.
16
0PB-
Negative Output Pins (Open Collector) for Channel B. Require DC Bias of +5V Nominal.
17
0PB+
Positive Output Pins (Open Collector) for Channel B. Require DC Bias of +5V Nominal.
18
0PB-
Negative Output Pins (Open Collector) for Channel B. Require DC Bias of +5V Nominal.
19
ENBB
Power Enable Pin for Channel B. Channel B is Enabled with a Logic High and Disabled with a Logic Low.
20
RESB
Current Adjust Pin. Connect a Resistor from RESB to Ground can Adjust the Channel B DC Current from 90mA
to 120mA. Leave Pin Floating for Nominal Bias of 120mA.
21
RESA
Current Adjust Pin. Connect a Resistor from RESA to Ground can Adjust the Channel A DC Current from 90mA
to 120mA. Leave Pin Floating for Nominal Bias of 120mA.
22
ENBA
Power Enable Pin for Channel A. Channel A is Enabled with a Logic High and Disabled with a Logic Low.
23
OPA-
Negative Output Pins (Open Collector) for Channel A. Require DC Bias of +5V Nominal.
24
OPA+
Positive Output Pins (Open Collector) for Channel A. Require DC Bias of +5V Nominal.
25
OPA-
Negative Output Pins (Open Collector) for Channel A. Require DC Bias of +5V Nominal.
26
OPA+
Positive Output Pins (Open Collector) for Channel A. Require DC Bias of +5V Nominal.
27
VCCA
Positive Supply Pins for Channel A. Should be Bypassed to Ground Using Suitable Bypass Capacitor.
28
GNDA
Device Common (DC Ground) for Channel A
29
IPA-
Channel A Negative Input.
30
IPA+
Channel A Positive Input.
31
A0
LSB for the Gain Control Interface for Channel A.
32
A1
LSB + 1 for the Gain Control Interface for Channel A.
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