LM97593VH/NOPB National Semiconductor, LM97593VH/NOPB Datasheet - Page 44
![IC DDC ADC/TUNER/AGC 128-PQFP](/photos/6/62/66285/vla128a_128-pqfp_sml.jpg)
LM97593VH/NOPB
Manufacturer Part Number
LM97593VH/NOPB
Description
IC DDC ADC/TUNER/AGC 128-PQFP
Manufacturer
National Semiconductor
Datasheet
1.LM97593VHNOPB.pdf
(50 pages)
Specifications of LM97593VH/NOPB
Number Of Bits
12
Sampling Rate (per Second)
65M
Data Interface
Serial
Number Of Converters
2
Power Dissipation (max)
560mW
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
128-BFQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM97593VH
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM97593VH/NOPB
Manufacturer:
VK
Quantity:
1 980
Company:
Part Number:
LM97593VH/NOPB
Manufacturer:
Texas Instruments
Quantity:
10 000
General Applications Information
10.0 OUTPUTS
Be very careful when driving a high capacitance bus. The
more capacitance the output drivers must charge for each
conversion, the more instantaneous digital current flows
through V
and DRGND. These large charging current
DR
spikes can cause on-chip ground noise and couple into the
analog circuitry, degrading dynamic performance. Adequate
bypassing, limiting output capacitance and careful attention
to the ground plane will reduce this problem.
To minimize noise due to output switching, minimize the load
currents at the digital outputs. Only one driven input should
be connected to each output pin. Additionally, inserting series
resistors of about 100Ω at the digital outputs, close to the ADC
pins, will isolate the outputs from trace and other circuit ca-
pacitances and limit the output currents, which could other-
wise result in performance degradation. See Figure 45.
30008741
FIGURE 44. AGC integrator output limits
www.national.com
44