Datasheet

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
ESD Tolerance (Note 4)
Human Body Model 2kV
Machine Model 200V
Charge Device Model 750V
Maximum Junction Temperature (T
JMAX
)
+150°C
Storage Temperature Range −40°C to +125°C
Supply Voltage (VDDA) −0.3V to +2.0V
Supply Voltage (VDDC) −0.3V and +2.0V
Supply Voltage (VIO) −0.3V and +3.6V
Voltage at Analog Inputs −0.3V and VDDA+0.3V
Voltage at Logic Inputs −0.3V and VIO+0.3
Operating Ratings (Note 1)
Operating Temperature Range(T
A
)
0°C to + 70°C
VDDA, Analog Supply +1.71V to +1.89V
VDDC, Digital Core Supply +1.71V to +1.89V
VIO, Digital IO Supply +2.37 to +3.47
Package Thermal Resistance (θ
JA
) (Note 3)
37°C/W
Analog Electrical Characteristics
Unless otherwise stated, the following conditions apply VIO = +3.3V, VDDA = VDDC = +1.8V, T
A
= 25°C.
Pin Parameter Conditions Min Typ Max Units
PLL Phase Noise 5MHz pulse rate, 1kHz offset –116 dBc/Hz
VDDA
Power Supply Current Register with No Pattern (08h - 19h)
18.5
mAVDDC 2.4
VIO 0.3
VDDA
Power Supply Current
Register Default Pluse Pattern
(08h - 19h), TX_EN = 15 kHz,
Pulse rate = 5 MHz
16.0
mAVDDC 6.50
VIO 13.4
PLL_CLK+
PLL Reference Clock
Frequency
38 40 42 MHz
Beamformer Output Timing Characteristics
Unless otherwise stated, the following conditions apply VIO = +3.3V, VDDA = VDDC = +1.8V, T
A
= 25°C.
Symbol Parameter Conditions Min Typ Max Units
Output Pulse Rate 0.625 80 MHz
Output Delay Range 102.4 µs
Output Delay Resolution 0.78 ns
Output Pattern Length 64 Pulses
t
OD
Output Propagation Delay
Delay Profile (00−07h) = 0
Asynchronous TX_EN
32 47.5 ns
t
R/F
Output Rise/Fall
I
LOAD
= 2mA
0.5 1.9 ns
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