71M6543F/H and 71M6543G/GH Data Sheet
6.4.14 71M6543 VREF
Table 104 shows the performance specifications for the 71M6543 ADC reference voltage (VREF).
Table 104: 71M6543 VREF Performance Specifications
Parameter
Condition
TA = 22 ºC
Min
Typ
Max
Unit
VREF output voltage,
VREF(22)
1.193
1.195
1.197
V
VREF output voltage,
VREF(22)
PLL_FAST=0
1.195
V
mV
VREF(CHOP=01) −
VREF(CHOP=10)
VREF chop step, trimmed
-10
-1.5
100
10
VREF power supply sensitivity
V3P3A = 3.0 to 3.6 V
1.5
mV/V
kΩ
ΔVREF / ΔV3P3A
VREF_DIS = 1,
VREF = 1.3 V to 1.7 V
VREF input impedance
VREF_CAL = 1,
ILOAD = 10 µA, -10 µA
VREF output impedance
3.2
kΩ
VNOM (T) =VREF(22) + (T − 22)TC1+ (T − 22)2 TC2
V
VNOM definition (see note 2)
If temperature characterization trim information is available (71M6543H and 71M6543GH, 0.1%)
VNOM temperature
coefficients:
(
)
35.091+0.01764∙TRIMT+1.587∙ TRIMBGB − TRIMBGD
TC1 =
µV/°C
−0.557 − 2.8 ∙ 10ꢆ4 ∙ 푇푅퐼푀푇
µV/°C2
TC2 =
VREF(T) deviation from
VNOM(T) (see note 1):
VREF(T) −VNOM (T) 106
-10
+10
ppm/°C
VNOM (T)
62
If temperature characterization trim information is not available (71M6543F and 71M6543G , 0.5%)
VNOM temperature
coefficients:
TC1 =
TC2 =
µV/°C
275 − 4.95⋅TRIMT
−0.557 + 0.00028⋅TRIMT
µV/°C2
VREF(T) deviation from
VNOM(T) (see note 1):
VREF(T) −VNOM (T) 106
-40
+40
ppm/°C
VNOM (T)
62
ppm/
year
VREF aging
Notes:
1. Guaranteed by design; not production tested.
±25
2. This relationship describes the nominal behavior of VREF at different temperatures, as
governed by a second order polynomial of 1st and 2nd order coefficients TC1 and TC2.
3. For the parameters in this table, unless otherwise specified, VREF_DIS = 0, PLL_FAST=1
v1.2
© 2008–2011 Teridian Semiconductor Corporation
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