Very Low Noise Single-Ended SAR ADC Driver with True Zero Output

The LTC6360 is a very low noise, high precision, high speed amplifier suitable for driving SAR ADCs. The LTC6360 features a total output noise of 2.3nV/√Hz combined with 150ns settling time to 16-bit levels (AV = 1).

While powered from a single 5V supply, the amplifier output can swing to 0V while maintaining high linearity. This is made possible with the inclusion of a very low noise on-chip charge pump that generates a negative voltage to bias the output stage of the amplifier, increasing the allowable negative voltage swing.

The LTC6360 is available in a compact 3mm × 3mm, 8-pin leadless DFN package and an 8-pin MSOP package with exposed pad and operates over a –40°C to 125°C temperature range.

Applications

* 16-Bit and 18-Bit SAR ADC Driver

* High Speed Buffer Amplifiers

* Low Noise Signal Processing

* Output Swings to True Zero on Single Supply

* 2.3nV/√Hz Noise Density

* Fast Settling Time: 150ns, 16-Bit, 4V Step

* 110dB SNR in 3MHz Bandwidth

* Low Distortion, HD2 = –103dBc and HD3 = –109dBc for 4VP-P Output at 40kHz

* Low Offset Voltage: 250μV Max

* Low Power Shutdown: 350μA Max

* 3mm × 3mm 8-Pin DFN and 8-lead MSOP Packages