STM32F205RF View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F205RF

ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

STMicroelectronics 

Electrical characteristics

STM32F20xxx

Table 64. ADC characteristics (continued)

Symbol

Parameter

Conditions

Min

Typ Max Unit

12-bit resolution

-

Single ADC

Sampling rate

fS(3)

(fADC = 30 MHz)

12-bit resolution

Interleave Dual ADC

-

mode

12-bit resolution

Interleave Triple ADC

-

mode

fADC = 30 MHz

3 sampling time

-

IVREF+(3)

ADC VREF DC current

consumption in conversion mode

12-bit resolution

fADC = 30 MHz

480 sampling time

-

12-bit resolution

fADC = 30 MHz

3 sampling time

-

IVDDA(3)

ADC VDDA DC current

consumption in conversion mode

12-bit resolution

fADC = 30 MHz

480 sampling time

-

12-bit resolution

-

2

Msps

-

3.75 Msps

-

6

Msps

300

500

µA

-

16

µA

1.6

1.8

mA

-

60

µA

1. If IRROFF is set to VDD, this value can be lowered to 1.7 V when the device operates in the 0 to 70 °C temperature range.

2. It is recommended to maintain the voltage difference between VREF+ and VDDA below 1.8 V.

3. Based on characterization, not tested in production.

4. VREF+ is internally connected to VDDA and VREF- is internally connected to VSSA.

5. RADC maximum value is given for VDD=1.8 V, and minimum value for VDD=3.3 V.

6. For external triggers, a delay of 1/fPCLK2 must be added to the latency specified in Table 64.

Equation 1: RAIN max formula

RAIN

=

-------------------(--k------–-----0----.--5-----)-------------------

fADC × CADC × ln (2N + 2)

–

RADC

The formula above (Equation 1) is used to determine the maximum external impedance

allowed for an error below 1/4 of LSB. N = 12 (from 12-bit resolution) and k is the number of

sampling periods defined in the ADC_SMPR1 register.

116/177

Doc ID 15818 Rev 9

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