12-Bit, 1.25Msps, Sampling A/D Converter with Shutdown

The LTC1410 is a 0.65µs, 1.25Msps, 12-bit sampling A/D converter that draws only 160mW from ±5V supplies. This easy-to-use device includes a high dynamic range sample-and-hold, a precision reference and requires no external components. Two digitally selectable power shutdown modes provide flexibility for low power systems.

The LTC1410’s full-scale input range is ±2.5V. Maximum DC specifications include ±1LSB INL and ±1LSB DNL over temperature. Outstanding AC performance includes 71dB S/(N + D) and 82dB THD at the Nyquist input frequency of 625kHz.

The unique differential input sample-and-hold 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 µP compatible, 12-bit parallel output port. There is no pipeline delay in the conversion results. A separate convert start input and a data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors.

Applications

* Telecommunications

* Digital Signal Processing

* Multiplexed Data Acquisition Systems

* High Speed Data Acquisition

* Spectrum Analysis

* Imaging Systems

* 1.25Msps Sample Rate

* Power Dissipation: 160mW

* 71dB S/(N + D) and 82dB THD at Nyquist

* No Pipeline Delay

* Nap (7mW) and Sleep (10µW) Shutdown Modes

* Operates with Internal 15ppm/°C Reference or External Reference

* True Differential Inputs Reject Common Mode Noise

* 20MHz Full Power Bandwidth Sampling

* ±2.5V Bipolar Input Range

* 28-Pin SO and SSOP Packages