Product Specifications
CY8C29466/CY8C29566
CY8C29666/CY8C29866
Document Number: 38-12013 Rev. AB Page 29 of 67
Figure 12. Basic Switch Mode Pump Circuit
DC Analog Reference Specifications
The following tables list guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75 V to 5.25 V
and –40 °C TA 85 °C, or 3.0 V to 3.6 V and –40 °C TA 85 °C, respectively. Typical parameters apply to 5 V and 3.3 V at 25 °C
and are for design guidance only.
The guaranteed specifications for RefHI and RefLO are measured through the analog continuous time PSoC blocks. The power levels
for RefHI and RefLO refer to the analog reference control register. AGND is measured at P2[4] in AGND bypass mode. Each analog
continuous time PSoC block adds a maximum of 10 mV additional offset error to guaranteed AGND specifications from the local
AGND buffer. Reference control power can be set to medium or high unless otherwise noted.
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.
Battery
C1
D1
+
PSoC
Vdd
Vss
SMP
V
BAT
V
PUMP
L
1
Table 21. 5-V DC Analog Reference Specifications
Reference
ARF_CR[5:3]
Reference Power
Settings
Symbol Reference Description Min Typ Max Unit
0b000
RefPower = High
Opamp bias = High
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.228 V
DD
/2 + 1.290 V
DD
/2 + 1.352 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.078 V
DD
/2 – 0.007 V
DD
/2 + 0.063 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.336 V
DD
/2 – 1.295 V
DD
/2 – 1.250 V
RefPower = High
Opamp bias = Low
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.224 V
DD
/2 + 1.293 V
DD
/2 + 1.356 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.056 V
DD
/2 – 0.005 V
DD
/2 + 0.043 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.338 V
DD
/2 – 1.298 V
DD
/2 – 1.255 V
RefPower = Med
Opamp bias = High
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.226 V
DD
/2 + 1.293 V
DD
/2 + 1.356 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.057 V
DD
/2 – 0.006 V
DD
/2 + 0.044 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.337 V
DD
/2 – 1.298 V
DD
/2 – 1.256 V
RefPower = Med
Opamp bias = Low
V
REFHI
Ref High V
DD
/2 + Bandgap V
DD
/2 + 1.226 V
DD
/2 + 1.294 V
DD
/2 + 1.359 V
V
AGND
AGND V
DD
/2 V
DD
/2 – 0.047 V
DD
/2 – 0.004 V
DD
/2 + 0.035 V
V
REFLO
Ref Low V
DD
/2 – Bandgap V
DD
/2 – 1.338 V
DD
/2 – 1.299 V
DD
/2 – 1.258 V