ADS5120

Features:

8 DIFFERENTIAL ANALOG INPUTS
1Vp-p DIFFERENTIAL INPUT RANGE
INT/EXT VOLTAGE REFERENCE
ANALOG/DIGITAL SUPPLY 1.8V
DIGITAL I/O SUPPLY 1.8V/3.3V
INTEGRAL NONLINEARITY: ±0.8LSB
SIGNAL-TO-NOISE: 58dB at fIN = 20MHz
SPURIOUS-FREE DYNAMIC RANGE: 72dB at fIN = 20MHz
794mW POWER DISSIPATION
INDIVIDUAL CHANNEL POWER-DOWN
257-LEAD, 0.8 BALL PITCH, PLASTIC MicroSTAR BGA™ (16 • 16mm)


Application

PORTABLE ULTRASOUND
PORTABLE INSTRUMENTATION


Pinout




Specifications

Supply Voltage: AV_DD to AGND, DV_DD to DGND ..................... 0.3V to +2.2V
DRV_DD to DGND ..................................................................... 0.3V to +4.0V
AGND to DGND ....................................................................... 0.3V to +0.3V
AV_DD to DV_DD ......................................................................... 2.2V to +2.2V
Reference Voltage Input Range REFT, REFB to AGND ... 0.3V to AV_DD + 0.3V
Analog Input Voltage Range AIN to AGND ................... 0.3V to AV_DD + 0.3V
Clock Input CLK to DGND ............................................. 0.3V to AV_DD + 0.3V
Digital Input to DGND ................................................... 0.3V to DV_DD + 0.3V
Digital Outputs to DRGND .......................................... 0.3V to DRVDD + 0.3V
Operating Temperature Range (TJ) ........................................... 0 to +105
Storage Temperature Range (TSTG) .........................................65 + 150


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-andhold 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 requirements of the application. A 10-bit parallel bus on eight channels is provided with 3-state outputs. The speed, resolution, and low-power of the ADS5120 makes it ideal for applications requiring high-density signal processing in low-power environments. The ADS5120 is characterized for operation from 0°C to 70°C.