ATTINY88-AU Atmel, ATTINY88-AU Datasheet - Page 164

• Manufacturer Part Number: ATTINY88-AU
• Description: MCU AVR 8K ISP FLASH 1.8V 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY88-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 28
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Processor Series: ATTINY8x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: 2-Wire/I2S/SPI
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 28
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATQT600, ATAVRTS2080B
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

17. ADC – Analog to Digital Converter
17.1
17.2
164
Features
Overview
ATtiny48/88
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ATtiny48/88 features a 10-bit, successive approximation Analog-to-Digital Converter (ADC). The
ADC is wired to a nine-channel analog multiplexer, which allows the ADC to measure the volt-
age at six (or eight, in 32-lead/pad/ball packages) single-ended input pins and from one internal,
single-ended voltage channel coming from the internal temperature sensor. Single-ended volt-
age inputs are referred to 0V (GND).
The ADC contains a Sample and Hold circuit which ensures that the input voltage to the ADC is
held at a constant level during conversion. A block diagram of the ADC is shown in
on page
There is a separate analog supply voltage pin for the ADC, AV
between supply voltage pins V
celer” on page 171
Internal reference voltage of nominally 1.1V is provided on-chip. Alternatively, V
as reference voltage.
10-bit Resolution
1 LSB Integral Non-linearity
± 2 LSB Absolute Accuracy
14 µs Conversion Time
15 kSPS at Maximum Resolution
Six Multiplexed Single Ended Input Channels
Temperature Sensor Input Channel
Optional Left Adjustment for ADC Result Readout
0
Selectable 1.1V ADC Reference Voltage
Free Running or Single Conversion Mode
Interrupt on ADC Conversion Complete
Sleep Mode Noise Canceler
–
– Two Additional Input Channels in 32-lead/pad/ball TQFP, QFN, and UFBGA Packages
V
CC
165.
ADC Input Voltage Range
on how to connect the analog suplly voltage pin.
CC
and AV
CC
may not exceed 0.3V. See section
CC
. The voltage difference
“ADC Noise Can-
CC
8008G–AVR–04/11
can be used
Figure 17-1