ADS5444
www.ti.com
SLWS162 – AUGUST 2005
13-BIT 250 MSPS ANALOG-TO-DIGITAL CONVERTER
FEATURES
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13-Bit Resolution
250 MSPS Sample Rate
SNR = 68.7 dBc at 100-MHz IF and 250 MSPS
SFDR = 71 dBc at 100-MHz IF and 250 MSPS
SNR = 67.6 dBc at 230-MHz IF and 250 MSPS
SFDR = 78 dBc at 230-MHz IF and 250 MSPS
2.2 V
PP
Differential Input Voltage
Fully Buffered Analog Inputs
5 V Analog Supply Voltage
3.3 V LVDS Compatible Outputs
Total Power Dissipation: 2.1 W
2's Complement Output Format
TQFP-80 PowerPAD™ Package
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Industrial Temperature Range = –40°C to 85°C
APPLICATIONS
Test and Measurement
Software-Defined Radio
Multi-channel Basestation Receivers
Basestation TX Digital Predistortion
Communications Instrumentation
RELATED PRODUCTS
ADS5424 - 14-bit, 105 MSPS
ADS5423 - 14-bit, 80 MSPS
ADS5440 - 13-bit, 210 MSPS
DESCRIPTION
The ADS5444 is a 13-bit 250 MSPS analog-to-digital converter (ADC) that operates from a 5 V supply, while
providing LVDS-compatible digital outputs from a 3.3 V supply. The ADS5444 input buffer isolates the internal
switching of the onboard track and hold (T&H) from disturbing the signal source. An internal reference generator
is also provided to further simplify the system design. The ADS5444 has outstanding low noise and linearity over
input frequency.
AV
DD
AIN
AIN
+
DV
DD
A1
TH1
TH2
Σ
−
A2
TH3
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−
Σ
A3
ADC3
ADC1
DAC1
ADC2
DAC2
VREF
Reference
5
Digital Error Correction
5
5
CLK
CLK
Timing
OVR
OVR
DRY
DRY
D[12:0]
GND
B0061-01
The ADS5444 is available in an 80-pin TQFP PowerPAD™ package. The ADS5444 is built on state of the art
Texas Instruments complementary bipolar process (BiCom3X) and is specified over the full industrial
temperature range (–40°C to 85°C).
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.
PowerPAD is a trademark of Texas Instruments.
PRODUCT PREVIEW information concerns products in the forma-
tive or design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the
right to change or discontinue these products without notice.
Copyright © 2005, Texas Instruments Incorporated
PRODUCT PREVIEW
TI [ TEXAS INSTRUMENTS ]
