LTC6400-14_15 Datasheet, PDF (10/16 Pages) Linear Technology – 2.4GHz Low Noise, Low Distortion Differential ADC Driver for 300MHz IF

LTC6400-14
PIN FUNCTIONS
V⁺ (Pins 1, 3, 10): Positive Power Supply (Normally tied
to 3V or 3.3V). All three pins must be tied to the same
voltage. Bypass each pin with 1000pF and 0.1μF capacitors
as close to the pins as possible.
V_OCM (Pin 2): This pin sets the output common mode
voltage. A 0.1μF external bypass capacitor is recom-
mended.
V^– (Pins 4, 9, 12, 17): Negative Power Supply (GND). All
four pins must be connected to same voltage/ground.
–OUT, +OUT (Pins 5, 8): Unfiltered Outputs. These pins
have series resistors, R_OUT 12.5Ω.
–OUTF, +OUTF (Pins 6, 7): Filtered Outputs. These pins
have 50Ω series resistors and a 2.7pF shunt capacitor.
ENABLE (Pin 11): This pin is a logic input referenced to
V_EE. If low, the part is enabled. If high, the part is disabled
and draws approximately 1mA supply current.
+IN (Pins 13, 14): Positive Input. Pins 13 and 14 are
internally shorted together.
–IN (Pins 15, 16): Negative Input. Pins 15 and 16 are
internally shorted together.
Exposed Pad (Pin 17): V^–. The Exposed Pad must be
connected to same voltage/ground as pins 4, 9, 12.
BLOCK DIAGRAM
V–
12
ENABLE
V⁺
11
10
V–
9
+IN
13
+IN
14
–IN
15
–IN
16
R_G
100Ω
BIAS CONTROL
R_F
500Ω
IN+
OUT–
IN–
R_G
100Ω
OUT+
R_F
500Ω
2k
5.3pF
R_OUT
12.5Ω
R_FILT
50Ω
R_FILT
50Ω
R_OUT
12.5Ω
+OUT
8
+OUTF
7
C_FILT
2.7pF _–OUTF
6
–OUT
5
COMMON
MODE CONTROL
1
V⁺
2
V_OCM
3
V⁺
4 _V–
640014 BD
10
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