SX8723 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
Manufacturer
SX8723 Datasheet PDF : 53 Pages
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SX8723
ZoomingADC™ for Pressure and Temperature Sensing
ADVANCED COMMUNICATIONS & SENSING
ZoomingADC Specifications
Unless otherwise specified: Temperature TA = +25° C, VDD = +5V, GND = 0V, VREF, ADC = +5V, VIN = 0V, over-sampling frequency
fS = 250 kHz, PGA3 on with Gain = 1, PGA1&PGA2 off, offsets GDOff2 = GDOff3 = 0. Power operation: normal (IB_AMP_ADC[1:0] =
IB_AMP_PGA[1:0] = '01'). For resolution n = 12 bits: OSR = 32 and NELCONV = 4. For resolution n = 16 bits: OSR = 512 and NELCONV = 2.
Bandgap chopped at NELCONV rate.
Parameter
Symbol Comments / Conditions
Min
Typ
Max
Unit
Analog Input
Differential Input Voltage Ranges
VIN = (VINP - VINN)
Reference Voltage Range
VREF, ADC = (VREFP – VREFN)
Programmable Gain Amplifier (PGA)
Gain = 1, OSR = 32 (Note 1)
Gain = 100, OSR = 32
Gain = 1000, OSR = 32
-2.42
-24.2
-2.42
2.42
V
24.2
mV
2.42
mV
VDD
V
Total PGA Gain
PGA1 Gain
PGA2 Gain
PGA3 Gain
Gain Setting Precision (each stage)
Gain Temperature Dependence
PGA2 Offset
PGA3 Offset
Offset Setting Precision (PGA2 or 3)
Offset Temperature Dependence
GDTOT
GD1
GD2
GD3
GDoff2
GDoff3
Input Impedance PGA1
Input Impedance PGA2, PGA3
Output RMS noise
ADC Static Performance
(Note 1)
See Table 5
See Table 6
Step = 1/12 V/V, See Table 8
Step = 0.2 V/V, See Table 7
Step = 1/12 V/V, See Table 9
(Note 2)
Gain = 1 (Note 3)
Gain = 10 (Note 3)
Maximal gain (Note 3)
PGA1 (Note 4)
PGA2 (Note 5)
PGA3 (Note 6)
1/12
1
1
0
-3
±0.5
±5
-1
-63/12
-3
±0.5
±5
1500
150
150
205
340
365
1000
10
10
127/12
3
1
63/12
3
V/V
V/V
V/V
V/V
%
ppm/°C
V/V
V/V
%
ppm/°C
kΩ
kΩ
kΩ
µV
µV
µV
Resolution, n
No Missing Codes
(Note 7)
(Note 8)
6
16
Bits
16
Bits
Gain Error
Offset Error
Integral Non-Linearity, INL
Differential Non-Linearity, DNL
Common Mode input range
Power Supply Rejection Ratio
ADC Dynamic Performance
PSRR
(Note 9)
n = 16 bits (Note 10)
n = 12 Bits (Note 11)
n = 16 Bits (Note 11)
n = 12 Bits (Note 12)
n = 16 Bits (Note 12)
VDD = 5V ± 0.3V (Note 13)
VDD = 3V ± 0.3V (Note 13)
±0.15
%
±1
%
±1
LSB
±0.6
LSB
±1.5
LSB
±0.5
LSB
±0.5
LSB
VSS-0.3
VBATT+0.3
V
78
dB
72
dB
Conversion Time
TCONV
Throughput Rate (Continuous Mode) 1/TCONV
Nbr of Initialization Cycles
NINIT
V1.5 © 2007 Semtech Corp.
n = 12 bits (Note 14)
n = 16 bits (Note 14)
n = 12 bits, fS = 250kHz
n = 16 bits, fS = 250kHz
6
133
1027
0
1.88
0.485
cycles/fS
cycles/fS
kSps
kSps
2
cycles
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