X96012 Datasheet, PDF (5/27 Pages) Intersil Corporation – Universal Sensor Conditioner with Dual Look Up Table Memory and DACs

X96012
ELECTRICAL CHARACTERISTICS (CONTINUED) (Conditions are as follows, unless otherwise specified)
All typical values are for 25°C ambient temperature and 5 V at pin Vcc. Maximum and minimum specifications are
over the recommended operating conditions. All voltages are referred to the voltage at pin Vss. All bits in control reg-
isters are “0”. 255Ω, 0.1%, resistor connected between R1 and Vss, and another between R2 and Vss. 400kHz TTL
input at SCL. SDA pulled to Vcc through an external 2kΩ resistor. 2-wire interface in “standby” (see notes 1 and 2 on
page 5). WP, A0, A1, and A2 floating. VRef pin unloaded
Symbol
Parameter
Min Typ Max Unit
Test Conditions / Notes
VRefout
Output Voltage at VRef at
25°C
1.205
1.21
1.215
V -20 µA ≤ I(VRef) ≤ 20 µA
RVref
VRef pin input resistance
20
40
kΩ VRM bit = “1”, 25°C
TCOref
Temperature coefficient
of VRef output voltage
-100
+100 ppm/° See note 4 and 5.
C
VRef Range
Voltage range when VRef
1
is an input
1.3
V See note 3.
TSenseRange Temperature sensor
-40
range
100
°C See note 4.
I_R
Current from pin R1 or R2
0
to Vss
3200 µA
V_POR
Power-on reset threshold
1.5
voltage
2.8
V
VccRamp
Vcc Ramp Rate
0.2
50
mV /
µs
V_ADCOK
ADC enable minimum
2.6
voltage
2.8
V See Figure 11.
Notes: 1.
2.
3.
4.
5.
The device goes into Standby: 200 ns after any STOP, except those that initiate a nonvolatile write cycle. It goes into Standby t_WC after
a STOP that initiates a nonvolatile write cycle. It also goes into Standby 9 clock cycles after any START that is not followed by the
correct Slave Address Byte.
t_WC is the time from a valid STOP condition at the end of a write sequence to the end of the self-timed internal nonvolatile write cycle. It
is the minimum cycle time to be allowed for any nonvolatile write by the user, unless Acknowledge Polling is used.
For this range of V(VRef) the full scale sink mode current at I1 and I2 follows V(VRef) with a linearity error smaller than 1%.
These parameters are periodically sampled and not 100% tested.
TCO_ref = [Max V(V_REF) - Min V(V_REF)] x 10⁶/(1.21V x 140°C)
5
FN8216.0
March 10, 2005