LTC1419

Features:

Sample Rate: 800ksps
Power Dissipation: 150mW
81.5dB S/(N + D) and 93dB THD
No Missing Codes
No Pipeline Delay
Nap and Sleep Shutdown Modes
Operates with 2.5V Internal 15ppm/ Reference or External Reference
True Differential Inputs Reject Common Mode Noise
20MHz Full-Power Bandwidth Sampling
Bipolar Input Range: ±2.5V
28-Pin SSOP and SO Packages


Application

Telecommunications
Digital Signal Processing
Multiplexed Data Acquisition Systems
High Speed Data Acquisition
Spectrum Analysis
Imaging Systems


Pinout




Specifications

AV_DD = V_DD = DV_DD (Notes 1, 2)
Supply Voltage (V_DD) ................................................ 6V
Negative Supply Voltage (V_SS).............................. 6V
Total Supply Voltage (V_DD to V_SS) .......................... 12V
Analog Input Voltage (Note 3)
    .....................................(V_SS 0.3V) to (V_DD + 0.3V)
Digital Input Voltage (Note 4) ...... (V_SS 0.3V) to 10V
Digital Output Voltage .... (V_SS 0.3V) to (V_DD + 0.3V)
Power Dissipation............................................ 500mW
Operating Temperature Range
     LTC1419C......................................... 0°C to 70°C
     LTC1419I..................................... 40°C to 85°C
Storage Temperature Range ........ 65°C to 150°C
Lead Temperature (Soldering, 10 sec)............. 300°C


Description

The LTC^® 1419 is a 1s, 800ksps, 14-bit sampling A/D converter that draws only 150mW from ±5V supplies. This easy-to-use device includes a high dynamic range sample-and-hold and a precision reference. Two digitally selectable power shutdown modes provide flexibility for low power systems.

The LTC1419 has a full-scale input range of ±2.5V. Out-standing AC performance includes 81.5dB S/(N + D) and 93dB THD with a 100kHz input; 80dB S/(N + D) and 86dB THD at the Nyquist input frequency of 400kHz.

The unique differential input sample-and-hold of LTC1419 can acquire single-ended or differential input signals up to its 20MHz bandwidth. The 60dB common mode rejection allows users to eliminate ground loops and common mode noise by measuring signals differentially from the source.

The ADC has a P compatible, 14-bit parallel output port.There is no pipeline delay in the conversion results. A separate convert start input and data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors.