CS4373

Features:

• Digital Input, Differential Analog Output
• Selectable Differential Outputs (OUT±, BUF±)
• Selectable Output Attenuation
- 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64
• User-programmable Test Modes
- Differential
- Common mode
• Output Voltage: 5 VP-P Differential
• Outstanding Noise Performance
- 114 dB SNR @ 430 Hz bandwidth
• Low Total Harmonic Distortion
- OUT±: -118 dB THD typical, -112 dB THD max
- BUF±: -100 dB THD typical, -95 dB THD max
• Low Power Consumption
- Normal mode: 7.8 mA
- Low power mode: 5.0 mA
- Power down: 400 A
- Sleep mode: 2 A
• Power Supply Options
- 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
App	Positive Digital Positive Analog Negative Analog	VD VA+ VA-	-0.3 -0.3 -3.3	+6.8 +6.8 +0.3	V V V
Input Current, Any Pin Except Supplies	(Note 11, 12)	Iin	-	±10	mW
Input Current, Supplies	(Note 12)	IIN	-	±50	mA
Output Current		IOUT	-	±25	mA
Power Dissipation	(Note 13)	PDS	-	500	mW
Analog Input Voltage	All Analog Pins	VINA	(VA-) - 0.5	(VA+) + 0.5	V
Digital Input Voltage	All Digital Pins	VIND	-0.5	(VD) + 0.5	V
Ambient Operating Temperature		TA	-40	85	°C
Storage Temperature		Tstg	-65	150	°C

Description

The CS4373 is a differential output digital-toanalog converter intended for high-resolution, low-frequency measurement systems. It is designed to work with the CS5376A and CS5378 digital filters, the CS3301 and CS3302 high-precision amplifiers, and the CS5371 or CS5372 high-performance modulators.

The CS4373 includes a set of multiplexed outputs which provide a precision output (OUT±) for testing the electronics channel and a buffered output (BUF±) for in-circuit sensor tests. It is driven by a bitstream and the maximum analog output is differential 5 volts peak-to-peak. Distortion performance of the DAC is typically -118 dB THD from the precision output, and -100 dB THD from the buffered output. Noise performance is 114 dB SNR over a 430 Hz bandwidth.

The CS4373 has very low power consumption. In normal mode (LPWR=0; MCLK=2.048 MHz), power consumption is 40 mW; while in Low Power mode (LPWR=1; MCLK=1.024 MHz), power consumption is 25 mW.