Datasheet

MAX11646/MAX11647
Low-Power, 1-/2-Channel, I
2
C, 10-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 2.7V to 3.6V (MAX11647), V
DD
= 4.5V to 5.5V (MAX11646), V
REF
= 2.048V (MAX11647), V
REF
= 4.096V (MAX11646),
f
SCL
= 1.7MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C. See Tables 1–5 for programming
notation.) (Note 1)
TIMING CHARACTERISTICS (Figure 1)
(V
DD
= 2.7V to 3.6V (MAX11647), V
DD
= 4.5V to 5.5V (MAX11646), V
REF
= 2.048V (MAX11647), V
REF
= 4.096V (MAX11646),
f
SCL
= 1.7MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C. See Tables 1–5 for programming
notation.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER REQUIREMENTS
Power-Supply Rejection Ratio PSRR Full-scale input (Note 10) ±0.01 ±0.5 LSB/V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TIMING CHARACTERISTICS FOR FAST MODE
Serial-Clock Frequency f
SCL
400 kHz
Bus Free Time Between a
STOP (P) and a
START (S) Condition
t
BUF
1.3 μs
Hold Time for a START (S)
Condition
t
HD:STA
0.6 μs
Low Period of the SCL Clock t
LOW
1.3 μs
High Period of the SCL Clock t
HIGH
0.6 μs
Setup Time for a REPEATED
START Condition (Sr)
t
SU:STA
0.6 μs
Data Hold Time t
HD:DAT
(Note 11) 0 900 ns
Data Setup Time t
SU:DAT
100 ns
Rise Time of Both SDA and SCL
Signals, Receiving
t
R
Measured from 0.3V
DD
to 0.7V
DD
20 +
0.1C
B
300 ns
Fall Time of SDA Transmitting t
F
Measured from 0.3V
DD
to 0.7V
DD
(Note 12)
20 +
0.1C
B
300 ns
Setup Time for a STOP (P)
Condition
t
SU:STO
0.6 μs
Capacitive Load for Each Bus
C
B
400 pF
Pulse Width of Spike
t
SP
50 ns
TIMING CHARACTERISTICS FOR HIGH-SPEED MODE (C
B
= 400pF, Note 13)
Serial-Clock Frequency f
SCLH
(Note 14) 1.7 MHz
Hold Time, REPEATED START
Condition (Sr)
t
HD:STA
160 ns
Low Period of the SCL Clock t
LOW
320 ns
High Period of the SCL Clock t
HIGH
120 ns
Setup Time for a REPEATED
START Condition (Sr)
t
SU
:
STA
160 ns
Data Hold Time t
HD
:
DAT
(Note 11) 0 150 ns
Data Setup Time t
SU
:
DAT
10 ns