C8051F962-A-GM Silicon Labs, C8051F962-A-GM Datasheet - Page 85

• Manufacturer Part Number: C8051F962-A-GM
• Description: 8-bit Microcontrollers - MCU 128KB, DC-DC, AES DQFN76
• Manufacturer: Silicon Labs

Specifications of C8051F962-A-GM

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 128 KB
• Data Ram Size: 8448 B
• On-chip Adc: Yes
• Operating Supply Voltage: 2.5 V to 3.3 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: DQFN-76
• Mounting Style: SMD/SMT
• Number Of Programmable I/os: 57
• Number Of Timers: 4

5.5. Low Power Mode
The SAR converter provides a low power mode that allows a significant reduction in operating current
when operating at low SAR clock frequencies. Low power mode is enabled by setting the AD0LPM bit
(ADC0PWR.7) to 1. In general, low power mode is recommended when operating with SAR conversion
clock frequency at 4 MHz or less. See the Electrical Characteristics chapter for details on power consump-
tion and the maximum clock frequencies allowed in each mode. Setting the Low Power Mode bit reduces
the bias currents in both the SAR converter and in the High-Speed Voltage Reference.
Note: This table assumes that the 24.5 MHz precision oscillator is used for 8- and 10-bit modes, and the 20 MHz
Table 5.1. Representative Conversion Times and Energy Consumption for the SAR ADC
conversion clocks
Total tracking time
Total time for one
ADC Throughput
Highest nominal
Total number of
conversion
conversion
Energy per
SAR clock
frequency
required
low power oscillator is used for 12-bit mode. The values in the table assume that the oscillators run at their
nominal frequencies. The maximum SAR clock values given in Table 4.12 allow for maximum oscillation
frequencies of 25.0 MHz and 22 MHz for the precision and low-power oscillators, respectively, when using
the given SAR clock divider values. Energy calculations are for the ADC subsystem only and do not include
CPU current.
(min)
8.17 MHz
351 ksps
(24.5/3)
2.85 µs
1.5 µs
8.2 nJ
8 bit
11
Normal Power Mode
with 1.65 V High-Speed VREF
8.17 MHz
323 ksps
(24.5/3)
3.09 µs
1.5 µs
8.9 nJ
10 bit
13
Rev. 0.5
(1.5+3 x 1.1)
52 (13 x 4)
6.67 MHz
(20.0/3)
79 ksps
12.6 µs
36.5 nJ
4.8 µs
12 bit
238 ksps
(24.5/6)
4.19 µs
1.5 µs
6.5 nJ
8 bit
MHz
4.08
11
Low Power Mode
214 ksps
(24.5/6)
4.68 µs
1.5 µs
7.3 nJ
10 bit
C8051F96x
4.08
MHz
13
(1.5+3 x 1.1)
4.00 MHz
52 (13*4)
56 ksps
(20.0/5)
17.8 µs
27.7 nJ
4.8 µs
12 bit
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