STM8AL3148 datasheet(99/124 Pages) STMICROELECTRONICS

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STM8AL313x/4x/6x STM8AL3L4x/6x

Electrical parameters

108

In the following table, data based on characterization results, not tested in production.

In the following table, data are guaranteed by design, not tested in production.

Table 54. DAC accuracy

Symbol

Parameter

Conditions

Typ.

Max(1)

Unit

DNL

Differential non

linearity(2)

RL ≥5 kΩ, CL≤50 pF, DACOUT buffer ON(3)

1.5

12-bit

LSB

No load, DACOUT buffer OFF

1.5

INL

Integral non linearity(4)

RL ≥5 kΩ, CL≤ 50 pF, DACOUT buffer ON(3)

No load, DACOUT buffer OFF

Offset

Offset error(5)

RL ≥5 kΩ, CL≤ 50 pF, DACOUT buffer ON(3)

±10

±25

No load, DACOUT buffer OFF

±5

±8

Offset1

Offset error at Code 1 (6)

DACOUT buffer OFF

±1.5

±5

Gain error Gain error(7)

RL ≥5 kΩ, CL≤ 50 pF, DACOUT buffer ON(3) +0.1/-0.2 +0.2/-0.5

No load, DACOUT buffer OFF

+0/-0.2

+0/-0.4

TUE

Total unadjusted error

RL ≥5 kΩ, CL≤ 50 pF, DACOUT buffer ON(3)

12-bit

LSB

No load, DACOUT buffer OFF

1. Not tested in production.

2. Difference between two consecutive codes - 1 LSB.

3. For 48-pin packages only. For 28-pin and 32-pin packages, DAC output buffer must be kept off and no load must be

applied.

4. Difference between measured value at Code i and the value at Code i on a line drawn between Code 0 and last Code 1023.

5. Difference between the value measured at Code (0x800) and the ideal value = VREF+/2.

6. Difference between the value measured at Code (0x001) and the ideal value.

7. Difference between the ideal slope of the transfer function and the measured slope computed from Code 0x000 and 0xFFF

when buffer is ON, and from Code giving 0.2 V and (VDDA -0.2) V when buffer is OFF.

Table 55. DAC output on PB4-PB5-PB6(1)

Symbol

Parameter

Conditions

Max

Unit

Rint

Internal resistance between

DAC output and PB4-PB5-PB6

output

2.7 V < VDD < 3.6 V

1.4

2.4 V < VDD < 3.6 V

1.6

2.0 V < VDD < 3.6 V

3.2

1.8 V < VDD < 3.6 V

8.2

1. 32 or 28-pin packages only. The DAC channel can be routed either on PB4, PB5 or PB6 using the routing interface I/O

switch registers.

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