ISL78600 Datasheet, PDF (13/22 Pages) Intersil Corporation – Multi-Cell Li-Ion Battery Manager

ISL78600
Electrical Specifications V_BAT = 6 to 60V, T_A = -20°C to +60°C, unless otherwise specified. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
(Note 7)
MAX
TYP (Note 7) UNITS
DAISY CHAIN COMMUNICATIONS INTERFACE: DHi1, DLo1, DHi2, DLo2
Daisy Chain Clock Frequency
Comms Rate (0, 1) = 11
450
500 550
kHz
Comms Rate (0, 1) = 10
225
250 275
kHz
Comms Rate (0, 1) = 01
112.5 125 137.5 kHz
Comms Rate (0, 1) = 00
56.25 62.5 68.75 kHz
Common Mode Reference Voltage
V_BAT/2
V
NOTES:
7. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
8. Scan and Measurement start times are synchronised by the receiver to the falling edge of the 24^th clock pulse (Daisy Chain systems) or to the falling edge
of the 16^th clock pulse (non-Daisy Chain, single device systems) of the Scan or Measure command. Clock pulses are at the SCLK pin for Master and
Stand-alone devices, and at the DHi/DLo1 pins for middle and top Daisy Chain devices. Maximum values are based on characterization of the internal clock
and are not 100% tested.
9. These MIN and/or MAX values are based on characterization data and are not 100% tested.
10. Stresses may be induced in the ISL78600 during soldering or other high temperature events that affect measurement accuracy. Initial accuracy does
not include effects due to this. See Figure 4B for cell reading accuracy obtained after soldering to Intersil evaluation boards. When soldering the
ISL78600 to a customized circuit board with a layout or construction significantly differing from the Intersil evaluation board, design verification tests
should be applied to determine drift due to soldering and over lifetime.
Timing Diagrams
CS
(FROM µC)
t_LEAD
t_HIGH
t_LOW
t_LAG
t_SPI:TO
t_CS:WAIT
SCLK
(FROM µC)
t_A
t_V
t_F
t_HO
t_DIS
DOUT
(TO µC)
t_SU
t_HI
t_R
DIN
(FROM µC)
CLOCK DATA INTO
ISL78600
CLOCK DATA OUT OF
ISL78600
FIGURE 1. SPI FULL DUPLEX (4-WIRE) INTERFACE TIMING
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FN7672.6
January 20, 2015