CS5550 datasheet(6/24 Pages) CIRRUS

6 / 24 page

CS5550

DS630F1

ANALOG CHARACTERISTICS (Continued)

Notes: 3. The minimum FSCR is limited by the maximum allowed gain register value.

4. All outputs unloaded. All inputs CMOS level.

5. 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 AGND. Then the CS5550 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):

VOLTAGE REFERENCE

Notes: 6. 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

Dynamic Characteristics

High Rate Filter Output Word Rate

OWR

DCLK/1024

Input Sampling Rate

DCLK = MCLK/K

DCLK/8

Full Scale Calibration Range

(Note 3)

FSCR

100

%F.S.

High Pass Filter Pole Frequency

-3 dB

0.5

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 4)

Active State (VD+ = 3.3 V)

Stand-by State

Sleep State

11.6

6.75

µW

Power Supply Rejection Ratio (AIN1

±)

(Gain = 10)

(50, 60 Hz)(Note 5)

(Gain = 50)

PSRR1

Power Supply Rejection Ratio (AIN2

±)

(Gain = 50)

(50, 60 Hz)(Note 5)

PSRR2

-55-

Parameter

Symbol

Min

Typ

Max

Unit

Reference Output

Output Voltage

REFOUT

2.4

2.6

Temperature Coefficient

(Note 6)

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

---------

⎩⎭

⎨⎬

⎧⎫

log

⋅

(VREFOUTMAX - VREFOUTMIN)

VREFOUTAVG

(

MAX

- T

MIN

(

1.0 x 10

(

VREF =

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