71M6541DSLASHFSLASHG datasheet(149/166 Pages) MAXIM

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71M6541D/F/G and 71M6542F/G Data Sheet

Rev 5

149

6.4.14 VREF

Table 109 shows the performance specifications for the ADC reference voltage (VREF).

Table 109: VREF Performance Specifications

Parameter

Condition

Min

Typ

Max

Unit

VREF output voltage,

VREF(22)

TA = 22 ºC

1.193

1.195

1.197

VREF output voltage,

VREF(22)

PLL_FAST=0

1.195

VREF output impedance

VREF_CAL = 1,

ILOAD = 10 µA, -10 µA

3.2

kΩ

VREF power supply sensitivity

ΔVREF / ΔV3P3A

V3P3A = 3.0 to 3.6 V

-1.5

1.5

mV/V

VREF input impedance

VREF_DIS = 1,

VREF = 1.3 V to 1.7 V

100

kΩ

VREF chop step, trimmed

VREF(CHOP=01) −

VREF(CHOP=10)

-10

VNOM definition (see note 2)

)

(

)

(

)

(

)

(

2 TC

VREF

VNOM

−

VNOM temperature

coefficients:

TC1 =

TC2 =

TRIMT

⋅

− 95

275

TRIMT

⋅

−

00028

557

µV/°C

VREF(T) deviation from

VNOM(T) (see note 1):

)

(

)

(

)

(

VNOM

VREF

−

-40

+40

ppm/°C

VREF aging

±25

ppm/

year

Notes:

Guaranteed by design; not production tested.

This relationship describes the nominal behavior of VREF at different temperatures, as governed by a

second order polynomial of 1

st and 2nd order coefficients TC1 and TC2.

For the parameters in this table, unless otherwise specified, VREF_DIS = 0, PLL_FAST=1.

71M6541D/F/G Datasheet(PDF) 149 Page - Maxim Integrated Products

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