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11050A–PMAAC–07-Apr-10

AT73C246

9.9 Measurement Bridge and 10-bit ADC

Notes: 1. The 10-bit ADC is supplied from the regulated V

DDC

voltage (1.8V) which is generated from V

INSYS

2. Please refer to Atmel Data Converter Terminology literature

Table 9-10. Measurement Bridge and 10-bit ADC Electrical Characteristics

Symbol Parameter Comments Min Typ Max Units

Operating Supply Voltage

(1)

INSYS

2.9 3.6 5.5 V

Supply Current

OFF - - 1 µA

ON - - 2 mA

REF

Reference Voltage

Internally connected to

VDDC pin.

1.75 1.8 1.85 V

INL Integral Non Linearity End Point Method -2 - +2 LSB

DNL Differential Non Linearity End Point Method -1 - +1 LSB

Offset Offset Error -2 +2 LSB

GAIN Gain Error -2 +2 LSB

Sampling Rate 300 kS/s

ACQ

Track and Hold Acquisition Time 500 ns

MEAS

Measured Input Voltage Range

External inputs ANA{0,1,2,3} 0.4 V

INSYS

DD{0,1,2,3,4}

inputs 0.4 4 V

INSYS

input 0.4 5.5 V

ATT

MEAS

Measured Input Scaling Factor

External inputs ANA{0,1,2,3} -1% 0.25 +1% V/V

DD{0,1,2,3,4,5}

inputs -1% 0.4 +1% V/V

INSYS

input -1% 0.25 +1% V/V

IN_NOM

ANA{0,1,2,3} Input resistance T

= 25C 96 120 144 kΩ

IN_TEMP

deviation with temperature

[-40 ; +25]. Relative to

IN_NOM

+ 20

[25 ; 125]. Relative to

IN_NOM

-16

ANA{0,1,2,3} Input capacitance 15 pF

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 158 159

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