The LTC®2356-12/LTC2356-14 are 12-bit/14-bit, 3.5Msps serial ADCs with differential inputs. The devices draw only 5.5mA from a single 3.3V supply and come in a tiny 10-lead MSOP package. A Sleep shutdown feature further reduces power consumption to 13µW. The combination of speed, low power and tiny package makes the LTC2356-12/ LTC2356-14 suitable for high speed, portable applications. The 80dB common mode rejection allows users to eliminate ground loops and common mode noise by measuring signals differentially from the source. The devices convert –1.25V to 1.25V bipolar inputs differentially. The absolute voltage swing for AIN+ and AIN– extends from ground to the supply voltage. The serial interface sends out the conversion results during the 16 clock cycles following a CONV rising edge for compatibility with standard serial interfaces. If two additional clock cycles for acquisition time are allowed after the data stream in between conversions, the full sampling rate of 3.5Msps can be achieved with a 63MHz clock.
The LTC2356‑12 and LTC2356‑14 are high‑speed, low‑power serial analog‑to‑digital converters. They operate from a single 3.3 V supply, draw only 5.5 mA in active mode, and are offered in a 10‑lead MSOP package. Key features include a 3.5 Msps conversion rate, 80 dB common‑mode rejection, and selectable 12‑bit or 14‑bit resolution.
These converters are suited for portable data‑acquisition systems, multiplexed data acquisition, RFID, UPS, motor‑control, and other high‑speed applications. The datasheet provides detailed electrical characteristics, pin functions, timing diagrams, and typical performance graphs to aid designers.
| Maximum Sampling Rate | 3.5 Msps |
|---|---|
| SINAD (14‑bit) | 74.1 dB |
| Common‑Mode Rejection Ratio | 80 dB |
The device can sample at up to 3.5 Msps.
The device provides 80 dB CMRR.