MAX11600 Datasheet, PDF (13/23 Pages) Maxim Integrated Products – 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/8-/12-Channel 2-Wire Serial 8-Bit ADCs

2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/8-/12-Channel 2-Wire Serial 8-Bit ADCs
DEVICE
MAX11600/MAX11601
MAX11602/MAX11603
MAX11604/MAX11605
SLAVE ADDRESS
1100100
1101101
1100101
SLAVE ADDRESS
S
1
1
0
0
1
0
0
R/W
A
SDA
SCL
1
2
3
4
5
6
7
8
9
Figure 7. Slave Address Byte
HS MODE MASTER CODE
S
0
0
0
0
1
X
X
X
A
Sr
SDA
SCL
F/S MODE
HS MODE
Figure 8. F/S Mode to HS Mode Transfer
Data Byte (Read Cycle)
A read cycle must be initiated to obtain conversion
results. Read cycles begin with the bus master issuing
a START condition followed by 7 address bits and a
read bit (R/W = 1). If the address byte is successfully
received, the MAX11600–MAX11605 (slave) issue an
acknowledge. The master then reads from the slave.
After the master has received the results, it can issue
an acknowledge if it wants to continue reading or a not
acknowledge if it no longer wishes to read. If the
MAX11600–MAX11605 receive a not acknowledge,
they release SDA, allowing the master to generate a
STOP or repeated START. See the Clock Mode and
Scan Mode sections for detailed information on how
data is obtained and converted.
Clock Mode
The clock mode determines the conversion clock, the
acquisition time, and the conversion time. The clock
mode also affects the scan mode. The state of the
setup byte’s CLK bit determines the clock mode (Table
1). At power-up, the MAX11600–MAX11605 default to
internal clock mode (CLK = zero).
Internal Clock
When configured for internal clock mode (CLK = zero),
the MAX11600–MAX11605 use their internal oscillator
as the conversion clock. In internal clock mode, the
MAX11600–MAX11605 begin tracking analog input on
the ninth falling clock edge of a valid slave address
byte. Two internal clock cycles later, the analog signal
is acquired and the conversion begins. While tracking
and converting the analog input signal, the
MAX11600–MAX11605 hold SCL low (clock stretching).
After the conversion completes, the results are stored in
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