Rainbow Electronics MAXQ3120 - Manual (Page 4)

MAXQ3120
High-Precision ADC
Mixed-Signal Microcontroller
4 _____________________________________________________________________
Note 1: Specifications to -40°C are guaranteed by design and not production tested. All typical values are guaranteed by design
characterization and are not production tested.
Note 2: Tested with T A = +25°C, DV DD = 3.3V, and all peripherals inactive except for port pins.
Note 3: These numbers are guaranteed by design and are not tested.
Note 4: Can be calculated as (f
HFXIN / 6).
Note 5: Can be calculated as 6 / (f HFXIN x C IN ).
Note 6: Can be calculated as 12 / (f HFXIN x C IN ).
Note 7: Assumes that no external components are connected to V LCD , V LCD1 , V LCD2 , or V ADJ .
ELECTRICAL CHARACTERISTICS (continued)
(DV DD , AV DD = V RST to 3.6V, V REF = 1.25V (external), f HFXIN = 8MHz, T A = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
INTERNAL REFERENCE
Reference Output Voltage 1.25 V
±120
Reference-Output Temperature
Coefficient
With V REF bandgap trimming
(ATRM[4:0] = 01111b)
±35
ppm/°C
Load Regulation I REF = ±2µA, C L = 12pF ±50 ±500 µV/µA
LCD INTERFACE
LCD Reference Voltage V
LCD
DV
DD
V
LCD Bias Voltage 1 V LCD1 Guaranteed by design
V ADJ + 2/3
(V LCD - V ADJ )
V
LCD Bias Voltage 2 V
LCD2
Guaranteed by design
V ADJ + 1/3
(V
LCD
- V
ADJ
)
V
LCD Adjustment Voltage (Note 7) V
ADJ
Guaranteed by design 0
0.4 x
V LCD
V
LCD Bias Resistor R LCD 20 k Ω
LCD Adjust Resistor R
LADJ
LRA4:LRA0 = 0 40 k Ω
Segment is driven at V LCD ; V LCD = 3V,
I SEGxx = -3µA, guaranteed by design
V LCD -
0.02
V LCD V
Segment is driven at V LCD1 ; V LCD1 = 2V,
I
SEGxx
= -3µA, guaranteed by design
V LCD1 -
0.02
V LCD1 V
Segment is driven at V LCD2 ; V LCD2 = 1V,
I SEGxx = -3µA, guaranteed by design
V LCD2 -
0.02
V LCD2 V
LCD Segment Voltage V SEGxx
Segment is driven at V ADJ ; V ADJ = 0V,
I
SEGxx
= +3µA, guaranteed by design
V ADJ 0.1 V
CLOCK SOURCE
External Crystal Frequency f HFXIN 1 8 MHz
REAL-TIME CLOCK
RTC Input Frequency f
32KIN
32kHz watch crystal 32.768 kHz
JTAG/FLASH PROGRAMMING
JTAG Clock Rate f TCK sysclk / 8
Mass erase 904
Flash Erase Time
Page erase 313
ms
Flash Programming Time 17 µs
Write/Erase Cycles 1,000,000 Cycles
Data Retention 20 Years