Cypress CY7C64215 manual Supply Voltage Rejection Ratio, DC Analog Reference Specifications, P24

						CY7C64215
Table 12. 3.3V DC Analog Output Buffer Specifications
Parameter	Description	Min	Typ	Max	Unit	Notes
VOSOB	Input Offset Voltage (Absolute Value)	–	3	12	mV
TCVOSOB	Average Input Offset Voltage Drift	–	+6	–	μV/°C
VCMOB	Common-Mode Input Voltage Range	0.5	-	Vdd - 1.0	V
ROUTOB	Output Resistance	–	1	–	W
	Power = Low
	Power = High	–	1	–	W
VOHIGHOB	High Output Voltage Swing
	(Load = 1K ohms to Vdd/2)
	Power = Low	0.5 x Vdd + 1.0	–	–	V
	Power = High	0.5 x Vdd + 1.0	–	–	V
VOLOWOB	Low Output Voltage Swing
	(Load = 1K ohms to Vdd/2)
	Power = Low	–	–	0.5 x Vdd – 1.0	V
	Power = High	–	–	0.5 x Vdd – 1.0	V
ISOB	Supply Current Including Bias Cell (No Load)		0.8	2.0	mA
	Power = Low
	Power = High	–	2.0	4.3	mA
PSRROB	Supply Voltage Rejection Ratio	34	64	–	dB	(0.5 x Vdd – 1.0) < VOUT
						< (0.5 x Vdd + 0.9).

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 0°C < TA < 70°C, or 3.0V to 3.6V and 0°C < TA < 70°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only.

Table 13. 5V DC Analog Reference Specifications

Parameter

Description

Min

Typ

Max

Unit

BG

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

Bandgap Voltage Reference	1.28	1.30	1.32	V
AGND = Vdd/2[3]	Vdd/2 – 0.04	Vdd/2 – 0.01	Vdd/2 + 0.007	V
AGND = 2 x BandGap[3]	2 x BG – 0.048	2 x BG – 0.030	2 x BG + 0.024	V
AGND = P2[4] (P2[4] = Vdd/2)[3]	P2[4] – 0.011	P2[4]	P2[4] + 0.011	V
AGND = BandGap[3]	BG – 0.009	BG + 0.008	BG + 0.016	V
AGND = 1.6 x BandGap[3]	1.6 x BG – 0.022	1.6 x BG – 0.010	1.6 x BG + 0.018	V
AGND Block to Block Variation	–0.034	0.000	0.034	V
(AGND = Vdd/2)[3]
RefHi = Vdd/2 + BandGap	Vdd/2 + BG – 0.10	Vdd/2 + BG	Vdd/2 + BG + 0.10	V
RefHi = 3 x BandGap	3 x BG – 0.06	3 x BG	3 x BG + 0.06	V
RefHi = 2 x BandGap + P2[6] (P2[6] = 1.3V)	2 x BG + P2[6] – 0.113	2 x BG + P2[6] – 0.018	2 x BG + P2[6] + 0.077	V
RefHi = P2[4] + BandGap (P2[4] = Vdd/2)	P2[4] + BG – 0.130	P2[4] + BG – 0.016	P2[4] + BG + 0.098	V
RefHi = P2[4] + P2[6] (P2[4] = Vdd/2, P2[6]	P2[4] + P2[6] – 0.133	P2[4] + P2[6] – 0.016	P2[4] + P2[6]+ 0.100	V
= 1.3V)
RefHi = 3.2 x BandGap	3.2 x BG – 0.112	3.2 x BG	3.2 x BG + 0.076	V
RefLo = Vdd/2 – BandGap	Vdd/2 – BG – 0.04	Vdd/2 – BG + 0.024	Vdd/2 – BG + 0.04	V
RefLo = BandGap	BG – 0.06	BG	BG + 0.06	V
RefLo = 2 x BandGap – P2[6] (P2[6] = 1.3V)	2 x BG – P2[6] – 0.084	2 x BG – P2[6] + 0.025	2 x BG – P2[6] + 0.134	V
RefLo = P2[4] – BandGap (P2[4] = Vdd/2)	P2[4] – BG – 0.056	P2[4] – BG + 0.026	P2[4] – BG + 0.107	V
RefLo = P2[4]-P2[6] (P2[4] = Vdd/2, P2[6] =	P2[4] – P2[6] – 0.057	P2[4] – P2[6] + 0.026	P2[4] – P2[6] + 0.110	V
1.3V)

Note

3. AGND tolerance includes the offsets of the local buffer in the enCoRe III block. Bandgap voltage is 1.3V ± 0.02V.

Document 38-08036 Rev. *C Page 17 of 30

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