Datasheet

250
7728G–AVR–06/10
ATtiny87/ATtiny167
22.9 Parallel Programming Characteristics
Figure 22-3. Parallel Programming Timing, Including some General Timing Requirements
Offset error
Gain = 8x or 20x, BIPOLAR
V
REF
= 4V, Vcc = 5V
ADC clock = 200 kHz
-2.0 0.5 2.0
LSB
Gain = 8x or 20x, UNIPOLAR
V
REF
= 4V, Vcc = 5V
ADC clock = 200 kHz
-2.0 0.5 2.0
V
REF
Reference voltage 2.56 AVCC - 0.5 V
VDIFF Input differential voltage -VREF/Gain +VREF/Gain V
AVcc Analog supply voltage Vcc - 0.3 Vcc + 0.3 V
VIN Input voltage Differential conversion 0 AVcc V
ADC conversion output -511 +511 LSB
Input bandwidth Differential conversion 4 kHz
VINT Internal voltage reference 2.4 2.56 2.7 V
RREF Reference input resistance 32 kΩ
RAIN Analog input resistance 100 MΩ
Table 22-10. ADC Characteristics, Differential Channels (-40°C/+125°C) (Continued)
Symbol Parameter Condition Min Typ Max Units
RDY/BSY
WR
Data & Contol
(DATA, XA0,
XA1/BS2,
PAGEL/BS1)
XTAL1
t
XHXL
t
WLWH
t
RLRH
t
DVXH
t
XLDX
t
PLWL
t
WLRH
t
PLBX
t
BVPH
t
XLWL
t
WLBX
t
BVWL