Cypress CY8C24223A, CY8C24423A manual DC Analog Reference Specifications, Ref Control Power = High

CY8C24223A, CY8C24423A

DC Analog Reference Specifications

The following tables list guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V and -40°C ≤ TA ≤ 125°C. Typical parameters apply to 5V at 25°C and are for design guidance only.

The guaranteed specifications are measured through the Analog Continuous Time PSoC blocks. The power levels for AGND refer to the power of the Analog Continuous Time PSoC block. The power levels for RefHi and RefLo refer to the Analog Reference Control register. The limits stated for AGND include the offset error of the AGND buffer local to the Analog Continuous Time PSoC block.

Note Avoid using P2[4] for digital signaling when using an analog resource that depends on the Analog Reference. Some coupling of the digital signal may appear on the AGND.

Table 16. DC Analog Reference Specifications

Symbol	Description	Min	Typ	Max	Units
BG	Bandgap Voltage Reference	1.25	1.30	1.35	V
–	AGND = Vdd/2a
	CT Block Power = High	Vdd/2 - 0.02	Vdd/2	Vdd/2 + 0.02	V
–	AGND = 2 x BandGapa
	CT Block Power = High	2.4	2.6	2.8	V
–	AGND = P2[4] (P2[4] = Vdd/2)a
	CT Block Power = High	P2[4] - 0.02	P2[4]	P2[4] + 0.02	V
–	AGND = BandGapa
	CT Block Power = High	1.23	1.30	1.37	V
–	AGND = 1.6 x BandGapa
	CT Block Power = High	1.98	2.08	2.14	V
–	AGND Column to Column Variation (AGND =
	Vdd/2)a	-0.035	0.000	0.035	V
	CT Block Power = High
–	RefHi = Vdd/2 + BandGap	Vdd/2 + 1.15	Vdd/2 +1.30	Vdd/2 +1.45	V
	Ref Control Power = High
–	RefHi = 3 x BandGap
	Ref Control Power = High	3.65	3.9	4.15	V
–	RefHi = 2 x BandGap + P2[6] (P2[6] = 1.3V)
	Ref Control Power = High	P2[6] + 2.4	P2[6] + 2.6	P2[6] + 2.8	V
–	RefHi = P2[4] + BandGap (P2[4] = Vdd/2)	P2[4] + 1.24	P2[4] +1.30	P2[4] + 1.36	V
	Ref Control Power = High
–	RefHi = P2[4] + P2[6] (P2[4] = Vdd/2, P2[6] = 1.3V)
	Ref Control Power = High	P2[4] + P2[6] - 0.1	P2[4] + P2[6]	P2[4] + P2[6] + 0.1	V
–	RefHi = 3.2 x BandGap
	Ref Control Power = High	3.9	4.16	4.42	V
–	RefLo = Vdd/2 – BandGap	Vdd/2 - 1.45	Vdd/2 - 1.3	1.15	V
	Ref Control Power = High
–	RefLo = BandGap
	Ref Control Power = High	1.15	1.3	1.45	V
–	RefLo = 2 x BandGap - P2[6] (P2[6] = 1.3V)
	Ref Control Power = High	2.4 - P2[6]	2.6 - P2[6]	2.8 - P2[6]	V
–	RefLo = P2[4] – BandGap (P2[4] = Vdd/2)	P2[4] - 1.45	1.3	P2[4] - 1.15	V
	Ref Control Power = High
–	RefLo = P2[4]-P2[6] (P2[4] = Vdd/2, P2[6] = 1.3V)
	Ref Control Power = High	P2[4] - P2[6] - 0.1	P2[4] - P2[6]	P2[4] - P2[6] + 0.1	V

a. AGND tolerance includes the offsets of the local buffer in the PSoC block. Bandgap voltage is 1.3V ± 0.05V.

Document Number: 3-12029 Rev. *E Page 19 of 31

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