LMH1982SQEEVAL/NOPB National Semiconductor, LMH1982SQEEVAL/NOPB Datasheet - Page 5

• Manufacturer Part Number: LMH1982SQEEVAL/NOPB
• Description: EVAL BOARD FOR LMH1982SQE
• Manufacturer: National Semiconductor

Specifications of LMH1982SQEEVAL/NOPB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.10 I
The I
from the USB board via header J11. These signals can be
probed at test points TP11 (SCL) and TP12 (SDA). Both sig-
nals traces have 4.7 kΩ pull-up resistors to VDD and 50Ω
series resistors to the I
ABLE input must be set high to allow I
1.11 USB BOARD AND PC SOFTWARE APPLICATION
When connected to the PC the Windows operating system
(OS) will interpret the USB board as a Human Interface De-
vice (HID) and use Microsoft’s standard HID driver included
in the OS. The LMH1982 evaluation software application de-
signed by National can access the USB board through dy-
namic link libraries, which are used by the PC application to
control the LMH1982 using the I
mation, consult the USB board reference manual and
LMH1982 evaluation software user guide.
2.0 Evaluation Board Schematic
2
2
C interface clock (SCL) and data (SDA) signals come
C INTERFACE
2
C pins of the LMH1982. The I2C_EN-
2
LP38693 LDO Regulators with External Power Input Header
C interface. For more infor-
2
C programming.
FIGURE 3. Schematic (1 of 4)
5
1.12 LIST OF TEST POINTS
Designator
TP1
TP2
TP3
TP4
TP7
TP11
TP12
Pin 6, J10
Pin 7, J10
Pin 8, J10
TP21
TP22
TP23
TP27
TP28
TP30
TP31
TABLE 9. Test Points
Signal Name
DVDD
VCC
VDD
VDD_VCXO
OEOUT
SCL
SDA
TOF_OUT
NO_LOCK
NO_REF
VCTRL
XO_OUT
TOF
HREF_A
VREF_A
HREF_B
VREF_B
30061903
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