AD9218

Features:

Dual 10-Bit, 40 MSPS, 65 MSPS, 80 MSPS, and 105 MSPS ADC
Low Power: 275 mW at 105 MSPS per Channel
On-Chip Reference and Track/Holds
300 MHz Analog Bandwidth Each Channel
SNR = 57 dB @ 41 MHz, Encode = 80 MSPS
1 V p-p or 2 V p-p Analog Input Range Each Channel
Single 3.0 V Supply Operation (2.7 V3.6 V)
Power-Down Mode for Single Channel Operation
Two's Complement or Offset Binary Output Mode
Output Data Alignment Mode
Pin-Compatible with 8-Bit AD9288
75 dBc Crosstalk between Channels




Application

Battery-Powered Instruments
Hand-Held Scopemeters
Low Cost Digital Oscilloscopes
I and Q Communications
Ultrasound Equipment




Pinout






Specifications

V_D, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 V
Analog Inputs . . . . . . . . . . . . . . . . . . . . 0.5 V to V_D + 0.5 V
Digital Inputs . . . . . . . . . . . . . . . . . . . 0.5 V to V_DD + 0.5 V
REF_IN Inputs . . . . . . . . . . . . . . . . . . . . .0.5 V to V_D + 0.5 V
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . .20 mA
Operating Temperature . . . . . . . . . . . . . . .55°C to +125°C
Storage Temperature . . . . . . . . . . . . . . . . 65°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . . . 150°C
Maximum Case Temperature . . . . . . . . . . . . . . . . . . . 150°C
_JA². . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57°C/W






Description

The AD9218 is a dual 10-bit monolithic sampling analog-to-digital converter with on-chip track-and-hold circuits and is optimized for low cost, low power, small size and ease of use. The product operates at a 105 MSPS conversion rate with outstanding dynamic performance over its full operating range.
Each channel can be operated independently. The ADC requires only a single 3.0 V (2.7 V to 3.6 V) power supply and an encode clock for full operation. No external reference or driver components are required for many applications. The digital outputs are TTL/CMOS-compatible and a separate output power supply pin supports interfacing with 3.3 V or 2.5 V logic.

The clock input is TTL/CMOS-compatible and the 10-bit digital outputs can be operated from 3.0 V (2.5 V to 3.6 V) supplies. User-selectable options are available to offer a combination of power-down modes, digital data formats and digital data timing schemes. In power-down mode, the digital outputs are driven to a high-impedance state. Fabricated on an advanced CMOS process, the AD9218 is available in a 48-lead surface-mount plastic package (7 * 7 mm
LQFP) specified over the industrial temperature range (40°C to +85°C).