SLWS160 − FEBRUARY 2005
14 Bit, 80 MSPS
Analog-to-Digital Converter
ADS5423
FEATURES
C0068 14 Bit Resolution
C0068 80 MSPS Maximum Sample Rate
C0068 SNR = 74 dBc at 80 MSPS and 50 MHz IF
C0068 SFDR = 94 dBc at 80 MSPS and 50 MHz IF
C0068 2.2 V
pp
Differential Input Range
C0068 5 V Supply Operation
C0068 3.3 V CMOS Compatible Outputs
C0068 1.85 W Total Power Dissipation
C0068 2s Complement Output Format
C0068 On-Chip Input Analog Buffer, Track and Hold,
and Reference Circuit
C0068 52 Pin HTQFP Package With Exposed
Heatsink
C0068 Pin Compatible to the AD6644/45
C0068 Industrial Temperature Range = −40C0053C to 85C0053C
APPLICATIONS
C0068 Single and Multichannel Digital Receivers
C0068 Base Station Infrastructure
C0068 Instrumentation
C0068 Video and Imaging
RELATED DEVICES
C0068 Clocking: CDC7005
C0068 Amplifiers: OPA695, THS4509
DESCRIPTION
The ADS5423 is a 14 bit 80 MSPS analog-to-digital converter (ADC) that operates from a 5 V supply, while providing 3.3 V
CMOS compatible digital outputs. The ADS5423 input buffer isolates the internal switching of the on-chip Track and Hold
(T&H) from disturbing the signal source. An internal reference generator is also provided to further simplify the system
design. The ADS5423 has outstanding low noise and linearity, over input frequency. With only a 2.2 V
PP
input range,
simplifies the design of multicarrier applications, where the carriers are selected on the digital domain.
The ADS5423 is available in a 52 pin HTQFP with heatsink package and is pin compatible to the AD6645. The ADS5423
is built on state of the art Texas Instruments complementary bipolar process (BiCom3) and is specified over full industrial
temperature range (−40°C to 85°C).
FUNCTIONAL BLOCK DIAGRAM
Reference
Timing
CLK+
OVR D[13:0]
CLK−
6
DMID DRY
VREF
A
IN
A
IN
TH1
5 5
Σ
DAC2ADC2
ADC3Σ
DAC1ADC1
A3
A1
TH2 TH3
C1
C2
AV
DD
DRV
DD
GND
Digital Error Correction
A2
+
−
+
−
PowerPad is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.
www.ti.com
www.ti.com
Copyright  2005, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.