L6000 datasheet(10/24 Pages) STMICROELECTRONICS

10 / 24 page

PULSE DETECTOR AND SERVO DEMODULATOR CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Data Comparator Section

(The input signals are AC coupled to DATA PATH and DATA PATH)

DATA PATH/

DATA PATH

Signal Range

–

1.5

Vpp

Differential Input resistance

–

Ω

Differential Input capacitance

–

Comparator Offset Voltage

(*)

––

±4mV

Threshold Voltage Hysteresis

(*)

–

20Kth

–

Kth

Threshold Voltage Gain

0.3

≤ ( LEVEL-LEVEL REF V) ≤

0.75, Kth = VTHDAC*0.651/127,

38 < VTHDAC < 125,

Vthresh = KTH*(LEVEL-LEVEL

REF V), also, %hyst =

VTHDAC*97.6%/127

Kth-9%

Kth

Kth+9%

V/V

Minimum Threshold Voltage

LEVEL-LEVEL REF V

≤ 0.1V,

Vthmin = VTHDAC*0.099/127

(*)

–

Vthmin

–

Clocking Section

(The input signals are AC coupled to CLOCK PATH and CLOCK PATH)

CLOCK PATH-CLOCK PATH

Signal Range

–

1.5

Vpp

Comparator Offset Voltage

(*)

––

±4mV

Differential Input Resistance

–

Ω

Differential Input Capacitance

–

Pulse Paring

Vs = 1Vpp, F = 4MHz

–

0.5

Prpagation Delay to READ

DATA I/O

Vs = 20mVpp sq. wave

Servo Section

SERVO REF V Voltage Range

2.15V

≤ SERVO REF V ≤ 2.75V

2.15

2.50

2.75

SERVO REF V Input Bias

Current

–1

0.2

µA

Voltage Gain, SERVO REF V

to POSITION OUT

|HOLD CAP A-HOLD CAP B|

≤

0.4V

0.98

1.0

1.02

v/v

POSIT ION OUT Pin Offset

Voltage

HOLD CAP A-HOLD CAP B =

0V, SERVO REF V = 2.50V

–0

±12

POSITI ON OUT Pin High

HOLD CAP A-HOLD CAP B =

+1.8V

Vcc

PULSE

–

Vcc

PULSE

Level Output Voltage

SERVO REF V = 2.50V,

Isource = 0.5mA

DET-

1.5

DET-

0.3

POSITI ON OUT Pin Low

HOLD CAP A-HOLD CAP B =

-1.8V

GND

PULSE

–

GND

PULSE

Level Output Voltage

SERVO REF V = 2.50V Isink =

0.5mA

DET

+0.3

DET

+1.5

POSITI ON OUT Pin Output

Resistance

VNG+1.5V

≤ POSITION

OUT

≤ VPG-1.5V

––

Ω

POSIT ION OUT GAIN

(POSITION OUT-SERVO REF

V)/Vpp

1.8

V/Vpp

(2)

HOLD CAP A/B Charge Current

Absolute Value

–

(*) Guaranted by design.

(2) Test limits under evaluation.

L6000

10/24

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