LTC1412

Features:

Sample Rate: 3Msps
72dB S/(N + D) and 82dB SFDR at Nyquist
±0.35LSB INL and ±0.25LSB DNL (Typ)
Power Dissipation: 150mW
External or Internal Reference Operation
True Differential Inputs Reject Common Mode Noise
40MHz Full Power Bandwidth Sampling
±2.5V Bipolar Input Range
No Pipeline Delay
28-Pin SSOP Package


Application

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


Pinout




Specifications

AV_DD = DV_DD = V_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
    LTC1412C.......................................................... 0°C to 70°C
    LTC1412I........................................................... 40°C to 85°C
Storage Temperature Range ................................ 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C


Description

The LTC^®1412 is a 12-bit, 3Msps, sampling A/D converter. This high performance device includes a high dynamic range sample-and-hold and a precision reference. Operating from ±5V supplies it draws only 150mW.

The ±2.5V input range is optimized for low noise and low distortion. Most high performance op amps also perform best over this range, allowing direct coupling to the analog inputs and eliminating the need for special translation circuitry. Outstanding AC performance includes 72dB S/(N + D) and 82dB SFDR at the Nyquist input frequency of 1.5MHz.

The unique differential input sample-and-hold of LTC1412 can acquire single-ended or differential input signals up to its 40MHz 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 high speed 12-bit parallel output port. There is no pipeline delay in the conversion results. A separate convert start input and converter status signal (BUSY) ease connections to FIFOs, DSPs and microprocessors. A digital output driver power supply pin allows direct connection to 3V logic.