STLC7550 datasheet(11/17 Pages) STMICROELECTRONICS

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ELECTRICAL SPECIFICATIONS

Unless otherwise noted, Electrical Characteristics are specified over the operating range.

Typical values are given for VDD = 3V, Tamb = 25°C and for nominal Master clock frequency

MCLK = 1.536MHz and oversampling ratio = 160.

Absolute Maximum Ratings (referenced to GND)

Symbol

Parameter

Value

Unit

VDD

DC Supply Voltage

-0.3, 7.0

V

VI,VIN

Digital or Analog Input Voltage

-0.3, VDD+0.3

V

II,IIN

Digital or Analog Input Current

±1mA

IO

Digital Output Current

±20

mA

IOUT

Analog Output Current

±10

mA

Toper

Operating Temperature

0, 70

°C

Tstg

Storage Temperature

-40, 125

°C

PDMAX

Maximum Power Dissipation

200

mW

ESD

Electrostatic Discharge

2000

V

Nominal DC Characteristics (VDD = 3V

± 5%, GND = 0V, TA = 0 to 70°C unless otherwise specified)

Symbol

Parameter

Min.

Typ.

Max.

Unit

VDD

Supply Voltage Range

2.70

3

5.5

V

POWER SUPPLY AND COMMON MODE VOLTAGE

SINGLE POWER SUPPLY (DVDD = AVDD)

IDDA

Analog Supply Current

6

mA

IDDD

Digital Supply Current

4

mA

IDD-LP

Supply Current in Low Power Mode

MCLK Stopped

MCLK Running

1

200

10

µA

VCM

Output Common Mode Voltage

VCM Output Voltage Load Current (see Note 1)

VDD/2-5%

VDD/2

VDD/2+5%

V

DIGITAL INTERFACE

VIL

Low Level Input Voltage

-0.3

0.5

V

VIH

High Level Input Voltage

DVDD-0.5

V

II

Input Current VI = VDD or VI = GND

-10

±110

µA

VOH

High Level Output Voltage (ILOAD = -600

µA)

DVDD-0.5

V

VOL

Low Level Output Voltage (ILOAD = 800

µA)

0.3

V

ANALOG INTERFACE

VREF

Differential Reference Voltage Output

VREF = (VREFP - VREFN)

1.15

1.25

1.35

V

Tempco (VREF)VREF Temperature Coefficient

200

ppm/°C

VCMO IN

Input Common Mode Offset Voltage = [(IN+)+(IN-)]/2 -VCM

-100

100

mV

VDIF IN

Differential Input Voltage : [(IN+)-(IN-)]

≤ 2 x VREF

2 x VREF

Vpp

VOFF IN

Differential Input DC Offset Voltage

-100

100

mV

VCMO OUT

Output Common Mode Voltage Offset :

(OUT+ + OUT-)/2 - VCM (see Note 1)

-20

20

mV

VDIF OUT

Differential Output Voltage : OUT+ - OUT-

≤ 2 x VREF

2 x VREF

V

VOFF OUT

Differential Output DC Offset Voltage : (OUT+ - OUT-) (0000x)

-100

100

mV

RIN

Input Resistance IN+, IN- (id. AUX IN)

100

k

Ω

ROUT

Output Resistance (OUT+, OUT-)

50

Ω

RL

Load Resistance (OUT+, OUT-)

10

k

Ω

CL

Load Capacitance (OUT+, OUT-)

20

pF

VADO OUT

Output A/D Modulator Voltage Offset : IN+ = IN- = VCM

-1000

+1000

LSB

Note :

1. Device is very sensitive to noise on VCM Pin. VCM output voltage load current must be DC (<10

µA). in order to drive dynamic load,

VCM must be buffered. AC variation in VCM current magnitude decrease A/D and D/A performance.

STLC7550

11/17

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