Datasheet

LMH6881
SNOSC72E –JUNE 2012–REVISED MARCH 2013 www.ti.com
PIN DESCRIPTIONS
Pin Number Symbol Pin Category Description
Analog I/O
9,10 INPD, INMD Analog Input Differential inputs 100 Ω
8, 11 INPS, INMS Analog Input Single-ended inputs 50 Ω
21, 22 OUTP, OUTM Analog Output Differential outputs, low impedance
Power
6, 7, 12, 13 GND Ground Ground pins. Connect to low impedance ground
plane. All pin voltages are specified with respect to
the voltage on these pins. The exposed thermal pad
is internally bonded to the ground pins.
19, 20, 23, 24 VCC Power Power supply pins. Valid power supply range is
4.75 V to 5.25 V.
Exposed Center Pad Thermal/ Ground Thermal management/ Ground
Digital Inputs
5 SPI Digital Input 0 = Parallel Mode, 1 = Serial Mode
Parallel Mode Digital Pins, SPI = Logic Low
3, 4, 15, 16 D0, D1, D2, D3 Digital Input Attenuator control
17 SD Digital Input Shutdown 0 = amp on, 1 = amp off
Serial Mode Digital Pins, SPI= Logic High, SPI compatible
4 SDO Digital Output - Open Emitter Serial Data Output (Requires external bias.)
3 SDI Digital Input Serial Data In
16 CS Digital Input Chip Select (active low)
15 CLK Digital Input Clock
PIN LIST
Pin Number Description Pin
1 NC
2 OCM Output Common Mode, gain of 2
3 D1, SDI Parallel mode = Logic control signal, position 1 or weight 2
1
SPI mode = serial data in (SDI)
4 D0, SDO Parallel mode = Logic control signal, position 0 or weight 2
0
SPI mode = serial data out (SDO)
5 SPI Serial mode control
6 GND Ground
7 GND Ground
8 INMS Amplifier single ended input minus swing (negative)
9 INMD Amplifier differential input minus swing (negative)
10 INPD Amplifier differential input plus swing (positive)
11 INPS Amplifier single ended input plus swing (positive)
12 GND Ground
13 GND Ground
14 NC
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