MAX14920 Datasheet, PDF (19/29 Pages) Maxim Integrated Products – High-Accuracy 12-/16-Cell Measurement AFEs

MAX14920 / MAX14921
High-Accuracy 12-/16-Cell Measurement AFEs
Table 1. SPI Configuration/Control Bits (continued)
NAME
CB9
CB10
CB11
CB12*
CB13*
CB14*
CB15*
CB16*
ECS
BITS
8
9
10
11
12
13
14
15
16
ACCESS
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RESET
0
0
0
0
0
0
0
0
0
0: Set BA9 output low
1: Set BA9 output high
0: Set BA10 output low
1: Set BA10 output high
0: Set BA11 output low
1: Set BA11 output high
0: Set BA12 output low
1: Set BA12 output high
0: Set BA13 output low
1: Set BA13 output high
0: Set BA14 output low
1: Set BA14 output high
0: Set BA15 output low
1: Set BA15 output high
0: Set BA16 output low
1: Set BA16 output high
0: Cell selection is disabled
1: Cell selection is enabled
DESCRIPTION
SC0
17
R/W
SC1
18
R/W
SC2
19
R/W
SC3
20
R/W
[ECS, SC0, SC1, SC2, SC3]
0
1 – SC0, SC1, SC2, SC3: Selects the cell for voltage readout during hold phase.**
The selected cell voltage is routed to AOUT after the rising CS edge. See Table 2.
0 – 0, 0, 0, 0: AOUT is three-stated and sampling switches are configured for
0
parasitic capacitance error calibration.
0 – 1, 0, 0, 0: AOUT is three-statedand self-calibration of buffer amplifier offset
voltage is initiated after the following rising CS.
0
0 – SC0, SC1, 0, 1: Switches the T1, T2. T2 analog inputs directly to AOUT. See
Table 3.
0 – 0, 0, 1, 1: VP/12 (MAX14920) or VP/16 (MAX14921) voltage is routed to AOUT
0
on the next rising CS
0 – SC0, SC1, 1, 1: Routes and buffers the T1, T2. T3 to AOUT. See Table 3.
SMPLB
21
R/W
DIAG
22
R/W
0: Device in sample phase if SAMPL input is logic-high
0
1: Device in hold phase
0: Normal operation
0
1: Diagnostic enable, 10FA leakage is sunk on all CV_ inputs (CV0–CV16).
0: Normal operation
LOPW
23
R/W
0
1: Low-power mode enabled. Current into LDOIN is reduced to 125FA. Current
into VP is reduced to 1FA.
*Not available on the MAX14920. Setting the bit to 0 or 1 does not affect the operating of the MAX14920.
**For the MAX14920, if n > 12, V_AOUT = 0V.
Maxim Integrated
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