SX8724C Datasheet, PDF (5/67 Pages) Semtech Corporation – ZoomingADC for sensing data acquisition

ADVANCED COMMUNICATIONS & SENSING
SX8724C
ZoomingADC for sensing data acquisition
DATASHEET
2 Operating Conditions
Unless otherwise specified: VREF,ADC = VBATT, VIN = 0V, Over-sampling frequency fS = 250 kHz, PGA3 on with Gain = 1,
PGA1&PGA2 off, offsets GDOff2 = GDOff3 = 0. Power operation: normal (IbAmpAdc[1:0] = IbAmpPga[1:0] = '01').
For resolution n = 12 bits: OSR = 32 and NELCONV = 4.
For resolution n = 16 bits: OSR = 256 and NELCONV = 2.
Bandgap chopped at NELCONV rate. If VBATT < 4.2V, Charge Pump is forced on. If VBATT > 4.2V, Charge Pump is forced off.
Table 2. Operating conditions limits
Parameter
Power supply
Operating temperature
Symbol
VBATT
TOP
Comment/Condition
Min
Typ
Max
Unit
2.4
5.5
V
-40
125
°C
.
Table 3. Electrical Characteristics
Parameter
Symbol
Comment/Condition
Min
Typ
Max
Unit
CURRENT CONSUMPTION¹
Active current, 5.5V
Active current, 3.3V
Sleep current
TIME BASE
IOP55
IOP33
ISLEEP
16 b @ 250 Sample/s
ADC, fs = 125 kHz
16 b @ 1kSample/s
PGA3 + ADC, fs = 500 kHz
16 b + gain 1000 @ 1kSample/s
PGA3,2,1 + ADC, fs = 500 kHz
16 b @ 250 Sample/s
ADC, fs = 125 kHz
16 b @ 1 kSample/s
PGA3 + ADC, fs = 500 kHz
16 b + gain 1000 @ 1kSample/s
PGA3,2,1 + ADC, fs = 500 kHz
@25°C
up to 85°C
@125°C
250
350
700
900
μA
1000
1350
150
300
μA
850
75
100
nA
150
200
Max ADC Over-Sampling frequency
ADC Over-Sampling frequency drift
fSmax
fST
@25°C
425
500
575
kHz
0.15
% / °C
DIGITAL I/O
Input logic high
Input logic low
Output logic high
Output logic low
SCL and SDA I/O
Input logic high
VIH
VIL
VOH
IOH < 4 mA
VOL
IOL < 4 mA
VIH
0.7
VBATT
0.3
VBATT
VBATT-0.4
V
0.4
V
0.7
VBATT
Revision 1.01
© Semtech
January 2011
Page 5
www.semtech.com/products/