CS4373A ∆∑ 28-pin SSOP 9.9 mm 7.4 mm IC dimensions CS4373A Features • Digital Delta-Sigma 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 • AC differential/common mode output • DC pulse/calibration output • AC output voltage: 5 Vp-p differential • DC output voltage: 2.5 Vdc differential • Outstanding noise performance • 114 dB SNR @ 430 Hz bandwidth • Low total harmonic distortion • OUT±: -115 dB THD typical, -112 dB THD max • BUF±: -105 dB THD typical, -95 dB THD max • Low-power consumption • Normal mode: 8 mA • Sleep mode: 500 µA • Power down: 120 µA • Dual power supply configuration • VA+ = +2.5 V; VA- = -2.5 V; VD = +3.3 V CS4373A Low-Power, High-Performance Delta-Sigma Test DAC for Testing Seismic Acquisition Systems and Geophysical Instruments CS4373A The CS4373A is a highly integrated Noise performance is 114 dB SNR over differential output digital-to-analog a 430 Hz bandwidth. Driven with a converter intended to test high-resolution, digital Delta-Sigma bit stream from the low-frequency measurement systems. Its digital filter, the maximum AC analog small footprint, low-power consumption, output voltage is a differential 5 V selectable attenuation, multiple outputs peak-to-peak signal. and programmable test modes make this device ideal for testing seismic Designed for use with Cirrus Logic’s acquisition systems and geophysical CS5376A or CS5378 digital instruments. filters, CS3301 or CS3302 highprecision amplifiers, and CS5371 The CS4373A muxed outputs provide or CS5372 high-performance a precision output (OUT±) for testing Delta-Sigma modulators, the the electronics channel and a buffered CS4373A offers a complete solution output (BUF±) for in-circuit sensor for testing single or multichannel testing. DAC distortion performance seismic system performance. (THD) of the precision output is typically -115 dB from the precision output and -105 dB from the buffered output. www.cirrus.com C i r r u s L o g i c , I n c . · 2 9 0 1 V i a F o r t u n a · A u s t i n T X 7 8 74 6 U S A · T 5 1 2 - 8 5 1 - 4 0 0 0 · T 8 0 0 - 8 8 8 - 5 0 1 6 · F 5 1 2 - 8 5 1 - 4 9 7 7 Product Bulletin 0150-1005-PB-W © 2005 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic is a trademark of Cirrus Logic, Inc. Other brand and product names may be trademarks or service marks of their respective owners.