CS3301

Features:

Signal Bandwidth: DC to 2 kHz
Selectable Gain: x1, x2, x4, x8, x16, x32, x64
Differential Inputs, Differential Outputs
• Multiplexed inputs: INA, INB, 800 termination
• Rough / fine charge outputs for CS5371/72
• Max signal amplitude: 5 Vpp differential
• Low input bias: 500 pA
Outstanding Noise Performance
• 0.20 Vp-p between 0.1 Hz and 10 Hz
• 8.5 from 0.1 Hz to 2 kHz
Low Total Harmonic Distortion
• -118 dB THD typical (0.000126%)
• -112 dB THD maximum (0.000251%)
Low Power Consumption
• Normal/LPWR/PWDN: 5.5 mA, 3.5 mA, 10 A
Single or Dual Power Supply Configurations
• VA+ = +5 V; VA- = 0 V; VD = +3.3 V to +5 V
• VA+ = +2.5 V;VA- = -2.5 V;VD = +3.3 V


Specifications

Parameter		Symbol	Min Max		Unit
DC Power Supplies	Positive Analog	VA+	-0.3	6.8	V
	Negative Analog	VA-	-6.8	0.3	V
	Digital	VD	-0.3	6.8	V
Analog Supply Differential	[(VA+) - (VA-)]	VADIFF	-	6.8	V
Digital Supply Differential	[(VD) - (VA-)]	VDDIFF	-	6.8	V
Input Current, Any Pin Except Supplies	(Note 3)	IIN	-	±10	mA
Input Current, Power Supplies	(Note 3)	IIN	-	±50	mA
Output Current	(Note 3)	IOUT	-	±25	mA
Power Dissipation		PDN	-	500	mW
Analog Input Voltages		VINA	(VA-)-0.3	(VA+)+0.3	V
Digital Input Voltages		VIND	-0.3	(VD)+0.3	V
Ambient Operating Temperature (Power Applied)		TA	-40	85	ºC
Storage Temperature Range		TSTG	-65	150	ºC

Description

The CS3301 is a low-noise differential input, differential output amplifier with programmable gain, optimized for amplifying signals from low-impedance sensors such as geophones. The gain settings are binary weighted (x1, x2, x4, x8, x16, x32, x64) and are selected using simple pin settings. Two sets of external inputs, INA and INB, simplify system design as inputs from a sensor and test DAC. An internal 800 termination can also be selected for noise tests.

CS3301 Amplifier noise performance is outstanding with a noise density of 8.5 over the 0.1 Hz to 2 Hz bandwidth. Distortion performance is also extremely good, typically -118 dB THD. Flat noise down to 0.1 Hz and low total harmonic distortion make this amplifier ideal for low-frequency, low-amplitude, differential signals requiring maximum dynamic range.