X9521 datasheet(20/26 Pages) XICOR

20 / 26 page

REV 1.1.9 1/30/03

Characteristics subject to change without notice.

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X9521

– Preliminary Information

POTENTIOMETER CHARACTERISTICS

Notes: 1.

Power Rating between the wiper terminal RWX(n) and the end terminals RHX or RLX - for ANY tap position n, (x=1,2).

Notes: 2.

Absolute Linearity is utilized to determine actual wiper resistance versus, expected resistance = (Rwx(n)(actual) –

Rwx(n)(expected)) = ±1 Ml Maximum (x=1,2).

Notes: 3.

Relative Linearity is a measure of the error in step size between taps = RWx(n+1) – [Rwx(n) + Ml] = ±1 Ml (x=0,1,2)

Notes: 4.

1 Ml = Minimum Increment = RTOT / (Number of taps in DCP - 1).

Notes: 5.

Typical values are for TA = 25°C and nominal supply voltage.

Notes: 6.

This parameter is periodically sampled and not 100% tested.

Symbol

Parameter

Limits

Test Conditions/Notes

Min.

Typ.

Max.

Units

RTOL

End to End Resistance Tolerance

–20

+20

VRHx

RH Terminal Voltage (x=1,2)

Vss

VCC

VRLx

RL Terminal Voltage (x=1,2)

Vss

VCC

Power Rating

(1)(6)

RTOTAL = 10 KΩ (DCP1)

5mW

RTOTAL = 100 KΩ (DCP2)

DCP Wiper Resistance

200

400

Ω

IW = 1mA, VCC = 5 V, VRHx =

Vcc, VRLx = Vss (x=1,2).

400

1200

Ω

IW = 1mA, VCC = 2.7 V, VRHx =

Vcc, VRLx = Vss (x=1,2)

Wiper Current (6)

4.4

Noise

mV /

sqt(Hz)

RTOTAL = 10 kΩ ( DCP1)

mV /

sqt(Hz)

RTOTAL = 100 kΩ (DCP2)

Absolute Linearity

(2)

-1

MI(4)

Rw(n)(actual) – Rw(n)(expected)

Relative Linearity

(3)

-1

MI(4)

Rw(n+1) – [Rw(n)+MI]

RTOTAL Temperature Coefficient

±300

ppm/°C

RTOTAL = 10 kΩ (DCP1)

±300

ppm/°C

RTOTAL = 100 kΩ (DCP2)

CH/CL/

Potentiometer Capacitances

10/10/

See Figure 21.

twcr

Wiper Response time (6)

200

µs

See Figure 25.

VTRIP

Vcc power up DCP recall threshold

tPU

Vcc power up DCP recall delay time (6)

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