AK8448 Datasheet, PDF (11/53 Pages) Asahi Kasei Microsystems – 6-Channel Linear Sensor compatible 10 Bit 40 MSPS x 3 Analog Pre-Processor

ASAHI KASEI
[AK8448]
( AVDD = 3.3 V, DVDD = 3.3 V, Ta = 25 °C, ADCK at 40MHz unless otherwise specified )
Parameter
Symbol
Condition
Min. Typ. Max. Unit
Current Consumption
Analog Part
In Normal
IA
6 channel mode
160 202 mA
Operation
Digital Output
ID
Part
At Power-Down IPD
6 channel mode, a full scale
minus 2 dB 1 MHz
sine-wave input signal,
CL = 10 pF
Analog part + Digital part
14.5 30
mA
0.1
mA
Characteristics above are when same external components and time-constant are used as
shown in the recommended , external circuit configuration examples.
( note 1 )
Time till the ADC output settles within +/− 1 LSB of the final value when a full-scale minus 2 dB
step signal is input.
( note 2 )
Defined as a sigma of ADC output code variations.
( note 3 )
It defines that the Offset DAC setting value in no input signal condition exists between Offset DAC
setting value of A0h ( equivalent to an input-referred, – 50 mV ) and 60h ( equivalent to an
input-referred, + 50 mV ) where ADC output code changes from 000h to 001h.
Since a total adjustable range of Offset Adjust DAC includes this internal Offset adjust range, a
practical adjustable range of input signal is reduced by the internal Offset amount.
( note 4 )
Definition at ADCK = 40 MHz, A/D conversion rate mode, 6 channels, CDS mode. PGA gain of
the channel to be measured is set at its maximum value, all other channels’ PGA gains are set at
minimum values.
Then measure how much the output code of the target channel to be measured fluctuates when
input to the measured channel is fixed and a full-scale minus 1 dB step signal is input on all other
channels.
( note 5 )
Definition at ADCK = 10 MHz, A/D conversion rate mode, all channels’ PGA gains at minimum
values.
Then measure how much the output code of the target channel to be measured fluctuates when
input to the measured channel is fixed and a full-scale minus 1 dB step signal is input on all other
channels.
MS1513-E-00
11
2013/02