A/D Converter. ADC14V155 Datasheet

ADC14V155 Converter. Datasheet pdf. Equivalent

ADC14V155 Datasheet
Recommendation ADC14V155 Datasheet
Part ADC14V155
Description 14-Bit Bandwidth A/D Converter
Feature ADC14V155; ADC14V155 14-Bit, 155 MSPS, 1.1 GHz Bandwidth A/D Converter with LVDS Outputs April 2007 ADC14V155.
Manufacture National Semiconductor
Datasheet
Download ADC14V155 Datasheet




National Semiconductor ADC14V155
April 2007
ADC14V155
14-Bit, 155 MSPS, 1.1 GHz Bandwidth A/D Converter with
LVDS Outputs
General Description
Features
The ADC14V155 is a high-performance CMOS analog-to-
digital converter with LVDS outputs. It is capable of converting
analog input signals into 14-Bit digital words at rates up to 155
Mega Samples Per Second (MSPS). Data leaves the chip in
a DDR (Dual Data rate) format; this allows both edges of the
output clock to be utilized while achieving a smaller package
size. This converter uses a differential, pipelined architecture
with digital error correction and an on-chip sample-and-hold
circuit to minimize power consumption and the external com-
ponent count, while providing excellent dynamic perfor-
mance. A unique sample-and-hold stage yields a full-power
1.1 GHz Full Power Bandwidth
Internal sample-and-hold circuit
Low power consumption
Internal precision 1.0V reference
Single-ended or Differential clock modes
Clock Duty Cycle Stabilizer
Dual +3.3V and +1.8V supply operation (+/- 10%)
Power-down and Sleep modes
Offset binary or 2's complement output data format
bandwidth of 1.1 GHz. The ADC14V155 operates from dual
+3.3V and +1.8V power supplies and consumes 951 mW of
power at 155 MSPS.
LVDS outputs
48-pin LLP package, (7x7x0.8mm, 0.5mm pin-pitch)
The separate +1.8V supply for the digital output interface al- Key Specifications
lows lower power operation with reduced noise. A power-
down feature reduces the power consumption to 15 mW while Resolution
still allowing fast wake-up time to full operation. In addition Conversion Rate
there is a sleep feature which consumes 50 mW of power and SNR (fIN = 70 MHz)
has a faster wake-up time.
SFDR (fIN = 70 MHz)
The differential
swing equal to
inputs
2 times
provide a full
the reference
scale differential
voltage. A stable
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internal voltage reference is provided, or the ADC14V155 can Power Consumption
be operated with an external reference.
14 Bits
155 MSPS
71.7 dBFS (typ)
86.9 dBFS (typ)
11.5 bits (typ)
1.1 GHz (typ)
951 mW (typ)
Clock mode (differential versus single-ended) and output data
format (offset binary versus 2's complement) are pin-se-
lectable. A duty cycle stabilizer maintains performance over
a wide range of input clock duty cycles.
Applications
High IF Sampling Receivers
Wireless Base Station Receivers
It is available in a 48-lead LLP package and operates over the Power Amplifier Linearization
industrial temperature range of −40°C to +85°C.
Multi-carrier, Multi-mode Receivers
Test and Measurement Equipment
Communications Instrumentation
Radar Systems
Block Diagram
© 2007 National Semiconductor Corporation 300052
30005202
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National Semiconductor ADC14V155
Connection Diagram
30005201
Ordering Information
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Industrial (−40°C TA +85°C)
ADC14V155CISQ
ADC14V155LFEB
ADC14V155HFEB
Package
48 Pin LLP
Evaluation Board (0-150 MHz)
Evaluation Board (>150 MHz)
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National Semiconductor ADC14V155
Pin Descriptions and Equivalent Circuits
Pin No.
ANALOG I/O
3
Symbol
VIN
4 VIN+
Equivalent Circuit
Description
Differential analog input pins. The differential full-scale input signal
level is two times the reference voltage with each input pin signal
centered on a common mode voltage, VCM.
43 VRP
45 VRM
44 VRN
46 VREF
8 CLK_SEL/DF
7 PD/Sleep
These pins should each be bypassed to AGND with a low ESL
(equivalent series inductance) 0.1 µF capacitor placed very close
to the pin to minimize stray inductance. A 0.1 µF capacitor should
be placed between VRP and VRN as close to the pins as possible,
and a 10 µF capacitor should be placed in parallel.
VRP and VRN should not be loaded. VRM may be loaded to 1mA for
use as a temperature stable 1.5V reference.
It is recommended to use VRM to provide the common mode
voltage, VCM, for the differential analog inputs, VIN+ and VIN−.
This pin can be used as either the +1.0V internal reference voltage
output (internal reference operation) or as the external reference
voltage input (external reference operation).
To use the internal reference, VREF should be decoupled to AGND
with a 0.1 µF, low equivalent series inductance (ESL) capacitor. In
wwwt.DhaitsaSmheeot4dUe.co,mVREF defaults as the output for the internal 1.0V
reference.
To use an external reference, overdrive this pin with a low noise
external reference voltage. The input impedance looking into this
pin is 9k. Therefore, to overdrive this pin, the output impedance
of the external reference source should be << 9kΩ.
This pin should not be used to source or sink current.
The full scale differential input voltage range is 2 * VREF.
This is a four-state pin controlling the input clock mode and output
data format.
CLK_SEL/DF = VA, CLK+ and CLK− are configured as a
differential clock input. The output data format is 2's complement.
CLK_SEL/DF = (2/3)*VA, CLK+ and CLK− are configured as a
differential clock input. The output data format is offset binary.
CLK_SEL/DF = (1/3)*VA, CLK+ is configured as a single-ended
clock input and CLK− should be tied to AGND. The output data
format is 2's complement.
CLK_SEL/DF = AGND, CLK+ is configured as a single-ended clock
input and CLK− should be tied to AGND. The output data format is
offset binary.
This is a three-state input controlling Power Down and Sleep
modes.
PD = VA, Power Down is enabled. In the Power Down state only
the reference voltage circuitry remains active and power dissipation
is reduced.
PD = VA/2, Sleep mode is enabled. Sleep mode is similar to Power
Down mode - it consumes more power but has a faster recovery
time.
PD = AGND, Normal operation.
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