Datasheet

MAX1169
If the internal reference is used and R/W = 0, shutdown
occurs when the master issues a not-acknowledge bit
while reading the conversion results. The internal refer-
ence and internal reference buffer are disabled during
shutdown, reducing the analog supply current to less
than 1μA.
A dummy conversion is required to power up the inter-
nal reference. The MAX1169 internal reference begins
powering up from shutdown on the 9th falling edge of a
valid address byte. Allow 12ms for the internal refer-
ence to settle before obtaining valid conversion results.
Reference Voltage
The MAX1169 provides an internal or accepts an exter-
nal reference voltage. The ADC input range is from
V
AGNDS
to V
REF
. (See the Transfer Function section.)
58.6ksps, 16-Bit, 2-Wire Serial ADC
in a 14-Pin TSSOP
16 ______________________________________________________________________________________
Figure 11. Read Cycle
S
1
SLAVE ADDRESS
71
R
NUMBER OF BITS
P OR Sr
1
1
8
RESULT #1 A
18
RESULT #1 A
1
8
RESULT A
18
RESULT A
1
CLOCK STRETCH
t
CONV
t
ACQ
A
8
RESULT #2 A
1
CLOCK STRETCH
t
CONV
t
ACQ
NUMBER OF BITS
89567
BIT3 BIT2 BIT1 BIT0 A
CLOCK STRETCH
t
AD
t
ACQ
t
AJ
SCL
SDA
123
D12D14 D13
t
CONV
8
RESULT #2 A
1
NUMBER OF BITS
P OR Sr
1
A
18
RESULT #N A
18
RESULT #N
CLOCK STRETCH
t
CONV
t
ACQ
(MOST SIGNIFICANT BYTE) (LEAST SIGNIFICANT BYTE)
(MOST SIGNIFICANT BYTE) (LEAST SIGNIFICANT BYTE)
(LEAST SIGNIFICANT BIT)
(MOST SIGNIFICANT BYTE)
(MOST SIGNIFICANT BYTE) (LEAST SIGNIFICANT BYTE)
ANALOG INPUT
TRACK AND HOLD
TRACKHOLD HOLD
B. CONTINUOUS CONVERSIONS
A. SINGLE CONVERSION
SLAVE TO MASTER
MASTER TO SLAVE
C. ACQUISITION DETAIL
D15
4
RS
1
SLAVE ADDRESS A
711
CLOCK STRETCH
t
ACQ
t
CONV