CS5461 datasheet(10/45 Pages) CIRRUS

10 / 45 page

CS5461

DS546F2

ANALOG CHARACTERISTICS (Continued)

Notes: 4. The minimum FSCR is limited by the maximum allowed gain register value.

5. All outputs unloaded. All inputs CMOS level.

6. Definition for PSRR: VREFIN tied to VREFOUT, VA+ = VD+ = 5 V, a 150 mV (zero-to-peak) (60 Hz) sinewave is imposed onto the +5 V DC supply

voltage at VA+ and VD+ pins. The “+” and “-” input pins of both input channels are shorted to VA-. Then the CS5461 is commanded to continuous

conversion acquisition mode, and digital output data is collected for the channel under test. The (zero-to-peak) value of the digital sinusoidal output

signal is determined, and this value is converted into the (zero-to-peak) value of the sinusoidal voltage (measured in mV) that would need to be

applied at the channel’s inputs, in order to cause the same digital sinusoidal output. This voltage is then defined as Veq. PSRR is then (in dB):

7. When voltage level on PFMON is sagging, and LSD bit is at 0, the voltage at which LSD bit is set to 1.

8. If the LSD bit has been set to 1 (because PFMON voltage fell below PMLO), this is the voltage level on

PFMON at which the LSD bit can be permanently reset back to 0.

VOLTAGE REFERENCE

Notes: 9. The voltage at VREFOUT is measured across the temperature range. From these measurements the

following formula is used to calculate the VREFOUT Temperature Coefficient:.

Parameter

Symbol

Min

Typ

Max

Unit

Power Supplies

Power Supply Currents (Active State)

IA+

ID+ (VD+ = 5 V)

ID+ (VD+ = 3.3 V)

PSCA

PSCD

1.3

2.9

1.7

Power Consumption

Active State (VD+ = 5 V)

(Note 5)

Active State (VD+ = 3.3 V)

Stand-By State

Sleep State

11.6

6.75

µW

Power Supply Rejection Ratio (Note 6)

(Gain = 10)

Current Channel (50, 60 Hz)

(Gain = 50)

PSRR

Power Supply Rejection Ratio (Note 6)

(Gain = 10)

Voltage Channel (50, 60 Hz)

PSRR

PFMON Low-Voltage Trigger Threshold

(Note 7)

PMLO

2.3

2.45

PFMON High-Voltage Power-On Trip Point

(Note 8)

PMHI

2.55

2.7

Parameter

Symbol

Min

Typ

Max

Unit

Reference Output

Output Voltage

REFOUT

2.4

2.6

Temperature Coefficient

(Note 9)

ppm/°C

Load Regulation

(Output Current 1 µA Source or Sink)

∆VR

-6

Reference Input

Input Voltage Range

VREFIN

2.4

2.5

2.6

Input Capacitance

Input CVF Current

PSRR

150

Veq

---------

⎩⎭

⎨⎬

⎧⎫

log

⋅

(VREFOUTMAX - VREFOUTMIN)

VREFOUTAVG

(

AMAX - TAMIN

(

1.0 x 10

(

VREF =

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