ADS5120
SBAS247B – MARCH 2002 – REVISED NOVEMBER 2002
www.ti.com
DESCRIPTION
The ADS5120 is a low-power, 8-channel, 10-bit, 40MSPS
CMOS Analog-to-Digital Converter (ADC) that operates from
a single 1.8V supply, while offering 1.8V and 3.3V digital I/O
flexibility. A single-ended input clock is used for simultaneous
sampling of up to eight analog differential input channels. The
flexible duty cycle adjust circuit (DCASEL) allows the use of a
non-50% clock duty cycle. Individual standby pins allow users
the ability to power-down any number of ADCs. A sample-and-
hold stage is added in front of the ADC and a digital error
correction circuit is used to generate the final digital code.
The internal reference can be bypassed to use an external
reference to suit the accuracy and temperature drift require-
ments of the application. A 10-bit parallel bus on eight chan-
nels is provided with 3-state outputs.
The speed, resolution, and low-power of the ADS5120 makes
it ideal for applications requiring high-density signal process-
ing in low-power environments.
The ADS5120 is characterized for operation from 0°C to 70°C.
FEATURES
a71 8 DIFFERENTIAL ANALOG INPUTS
a71 1Vp-p DIFFERENTIAL INPUT RANGE
a71 INT/EXT VOLTAGE REFERENCE
a71 ANALOG/DIGITAL SUPPLY 1.8V
a71 DIGITAL I/O SUPPLY 1.8V/3.3V
a71 INTEGRAL NONLINEARITY: ±0.8LSB
a71 SIGNAL-TO-NOISE: 58dB at f
IN
= 20MHz
a71 SPURIOUS-FREE DYNAMIC RANGE: 72dB at
f
IN
= 20MHz
a71 794mW POWER DISSIPATION
a71 INDIVIDUAL CHANNEL POWER-DOWN
a71 257-LEAD, 0.8 BALL PITCH, PLASTIC
MicroSTAR BGA™ (16 • 16mm)
Copyright © 2002, Texas Instruments Incorporated
8-Channel, 10-Bit, 40MSPS, 1.8V
CMOS ANALOG-TO-DIGITAL CONVERTER
MicroSTAR BGA is a trademark of Texas Instruments.
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.
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.
T&H
10-Bit
ADC
3-State
Output
Buffers
D[9:0]
A
T&H
10-Bit
ADC
3-State
Output
Buffers
D[9:0]
H
DCASEL
AINA+
CLK
AINA–
AINH–
AINH+
IREFR
AV
DD
STBY (x8) OE DRV
DD
DV
DD
Internal
Reference
Circuit
CM
AGND DRVGND DGNDBG PDREF REFT REFB CML
APPLICATIONS
a71 PORTABLE ULTRASOUND
a71 PORTABLE INSTRUMENTATION