Sigma Designs Inc ZM5304-U User Manual
Datasheet: ZM5304
16
DSH12461-3 | 7/2013
5.7 ANALOG-TO-DIGITAL CONVERTER
Measured at an ambient temperature of T
A
=-10°C to +85°C and a supply voltage of V
DD
=+2.3V to +3.6V.
Table 5.14: 12 bit ADC characteristics
Symbol
Description
Min
Max
Unit
V
BG
Internal reference voltage
+1.20
+1.30
V
V
REF+
Upper reference input voltage
V
DD
- 0.90
V
DD
V
V
REF-
Lower reference input voltage
0.00
+1.20
V
DNL
ADC
Differential non-linearity
-1.00
+1.00
LSB
ACC
8b
Accuracy when sampling 20ksps with 8 bit resolution
-2.00
2.00
LSB
ACC
12b
Accuracy when sampling 10ksps with 12 bit resolution
-5.00
5.00
LSB
f
S-8b
8 bit sampling rate
-
0.02 Msps
f
S-12b
12 bit sampling rate
-
0.01 Msps
5.8 DC CHARACTERISTICS
Measured at an ambient temperature of TA=-10°C to +85°C.
Table 5.15: Digital input characteristics, supply voltage of V
DD
=+2.3V to +3.0V
Symbol
Description
Min
Max
Unit
V
IH
Logical 1 input voltage high level
+1.85
-
V
V
IL
Logical 0 input voltage low level
-
+0.75
V
V
IF
Falling input trigger threshold
+0.75
+1.05
V
V
IR
Rising edge trigger threshold
+1.35
+1.85
V
V
HYS
Schmitt trigger voltage hysteresis
+0.55
+0.85
V
I
IH
Logical 1 input high level current leakage
-
+7.00
µA
I
IL-NPU
Logical 0 input low level current leakage (no internal pull-up resistor)
-
-7.00
µA
I
IL-PU
Logical 0 input low level current leakage (with internal pull-up resistor)
+35.00
+90.00
µA
C
IN
Pad input capacitance
-
15.00
pF
Table 5.16: Digital output characteristics, supply voltage of V
DD
=+2.3V to +3.0V
Symbol
Description
Min
Max
Unit
V
OH
Logical 1 output voltage high level
+1.9
-
V
V
OL
Logical 0 output voltage low level
-
+0.4
V
I
OH-LP
Logical 1 output high level current sourcing
+6.0
mA
I
OL-LP
Logical 0 output low level current sinking
-6.0
mA