CS5542

Features:

·Delta-Sigma Architecture:
   - 5th Order Modulator
   - 22-Bit Resolution
·dc Accuracy (fBW = 250Hz):
   - Integral Linearity: ±0.001 % F.S.
   - Differential Linearity: ±0.5 LSBs
   - RMS Noise: 1.1 pARMS
·Pin Selectable Input Range:
   - ±400 nA to ±2.5 µA Full Scale
·8-Channel Digital FIR Filter
·Self-calibration of Offset and Gain
·Low Power: 50 mW /ch for 8-ch system

Pinout




Specifications

Parameter	Symbol	Min	Typ	Max	UnitS
Source Transient Voltage into INL and INR inputs (Note 7)		-	-	1000	V
Source Transient Current into INL and INR inputs		-	-	100	mA
Operating Voltages                                          Positive Analog                                          Negative Analog                                          Positive Digital	VA+ VA- VD+	-0.3 +0.3 0.3	- - -	6.0 -6.0 VA+)+0.3	V V V
Input Current, Any Pin Except Supplies	Iin	-	-	±10	mA
Digital Input Voltage	VIND	-0.3	-	(VD+) + 0.3	V
Storage temperature	Tstg	-65		150

Notes: 7. Transient model is 100 pF through a 1500 ohm source resistance.

*Warning: Operation beyond these limits may result in permanent damage to the device Normal operations
                  not guaranteed at these extremes


Description

The CS5542 / CS5543 chip set is designed to be a complete current measurement data acquisition system. The CS5542 is a 22-Bit, 2-channel, 5th-order delta sigma modulator. The CS5543 is a monolithic CMOS, 8- channel digital FIR filter designed to be used with up to four CS5542's forming an 8-channel system. The complete system is capable of cascading up to 1024 channels.

The system CS5542 supports 22-bit measurement resolution with output conversion rates up to 1 kHz per channel. JTAG boundary-scan capability is available to facilitate self-test at the system level.

Potential applications for the CS5542/CS5543 system are environmental monitoring, process control systems, color sensing, light measurement, chemical analyzers