CS5504

Features:

Delta-sigma A/D Converter
  - 20-bit, No Missing Codes
  - Linearity Error: ±0.0007%FS
2 Differential Inputs
  - Pin-selectable Unipolar/Bipolar Ranges
  - Common Mode Rejection
            105 dB @ dc
            120 dB @ 50, 60 Hz
Either 5V or 3.3V Digital Interface
On-chip Self-calibration Circuitry
Output Update Rates up to 200/Sps
Low Power Consumption: 4.4 mW

Pinout




Specifications

Parameter	Symbol	Min	Typ	Max	Unit
DC Power Supplies:              Digital Ground       (Notes 21)                                              Positive Digital      (Notes 22)                                              Positive Analog                                              Negative Analog	DGND VD+ VA+ VA-	-0.3 -0.3 -0.3 +0.3	- - - -	(VD+)-0.3 6.0 or VA+ 12 -6.0	V V V V
Input Current, Any Pin Except Supplies       (Notes 23, 24)	IIN	-	-	±10	mA
Output Current	IOUT	-	-	±25	mA
Power Dissipation (Total)                                    (Note 25)		-	-	500	mW
Analog Input Voltage                            AIN and VREF pins	VINA	(VA-) - 0.3	-	(VA+) + 0.3	V
Digital Input Voltage	VIND	- 0.3	-	(VD+) + 0.3	V
Ambient Operating Temperature	TA	-40	-	85
Storage Temperature	Tstg	-65	-	150

Notes: 21. No pin should go more positive than (VA+)+0.3V.
           22. VD+ must always be less than (VA+) +0.3V, and can never exceed +6.0 V.
           23. Applies to all pins including continuous overvoltage conditions at the analog input (AIN) pin.
           24. Transient currents of up to 100mA will not cause SCR latch-up. Maximum input current for a power supply pin is ± 50 mA.
           25. Total power dissipation, including all input currents and output currents.

* WARNING: Operation at or beyond these limits may result in permanent damage to the device.
                    Normal operation is not guaranteed at these extremes.


Description

The CS5504 is a 2-channel, fully differential 20-bit, serial-output CMOS A/D converter. The CS5504 uses charge-balanced (delta-sigma) techniques to provide a low cost, high-resolution measurement at output word rates up to 200 samples per second.

The on-chip digital filter CS5504 offers superior line rejection at 50 Hz and 60 Hz when the device is operated from a 32.768 kHz clock (output word rate = 20 Sps).

The CS5504 has on-chip self-calibration circuitry which can be initiated at any time or temperature to ensure minimum offset and full-scale errors.

Low power, high-resolution and small package size make the CS5504 an ideal solution for loop-powered transmitters, panel meters, weigh scales and battery-powered instruments.