sx8724s Semtech Corporation, sx8724s Datasheet - Page 7

• Manufacturer Part Number: sx8724s
• Description: Zoomingadc For Sensing Data Acquisition
• Manufacturer: Semtech Corporation

Revision 1.0
© Semtech
Table 4.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
ADVANCED COMMUNICATIONS & SENSING
Parameter
Output RMS Noise per over-sample
ADC STATIC PERFORMANCES
Resolution
(No Missing Codes)
Gain Error
Offset Error
Integral Non-Linearity
Differential Non-Linearity
Power Supply Rejection Ratio
DC
ADC DYNAMIC PERFORMANCES
Conversion Time
Throughput Rate (Continuous Mode)
PGA Stabilization Delay
ZADC ANALOG QUIESCENT CURRENT
ADC Only Consumption
PGA1 Consumption
PGA2 Consumption
PGA3 Consumption
ANALOG POWER DISSIPATION: All PGAs & ADC Active
Normal Power Mode
3/4 Power Reduction Mode
1/2 Power Reduction Mode
1/4 Power Reduction Mode
Gain defined as overall PGA gain GDTOT = GD1 x GD2 x GD3. Maximum input voltage is given by: V
Offset due to tolerance on GDoff2 or GDoff3 setting. For small intrinsic offset, use only ADC and PGA1.
Measured with block connected to inputs through Amux block. Normalized input sampling frequency for input impedance is f
(f
Figure independent from gain and sampling frequency. f
Resolution is given by n = 2 log2(OSR) + log2(N
If a ramp signal is applied to the input, all digital codes appear in the resulting ADC output data.
Gain error is defined as the amount of deviation between the ideal (theoretical) transfer function and the measured transfer function
(with the offset error removed).
Offset error is defined as the output code error for a zero volt input (ideally, output code = 0). For 1 LSB offset, N
S
max, worst case). This figure must be multiplied by 2 for f
ZoomingADC Specifications
February 2011
Symbol
1/T
T
PSRR
DNL
INL
CONV
I
n
CONV
Q
ELCONV
PGA1.
PGA2.
PGA3.
Note 5
Note 6
Note 7
n = 16 bits.
resolution n = 12 bits.
resolution n = 16 bits.
resolution n = 12 bits.
resolution n = 16 bits.
V
V
n = 12 bits.
n = 16 bits.
n = 12 bits, fs = 250 kHz
n = 16 bits, fs = 250 kHz
Note 13
(see
V
V
V
V
V
V
V
V
BATT
BATT
BATT
BATT
BATT
BATT
BATT
BATT
BATT
BATT
). OSR can be set between 8 and 1024, in powers of 2. N
Table 11, page
= 5V +/- 0.3V.
= 3V +/- 0.3V.
= 5.5V/3.3V
= 5.5V/3.3V
= 5.5V/3.3V
= 5.5V/3.3V
= 5.5V/3.3V.
= 5.5V/3.3V.
= 5.5V/3.3V.
= 5.5V/3.3V.
Note 4
Note 4
Note 4
S
Page 7
. The effective output noise is reduced by the over-sampling ratio
S
Note 8
Note 12
Note 12
Condition
= 250 kHz, 4 for f
Note 14
Note 15
Note 16
Note 17
Note 11
Note 11
22)
Note 9
Note 9
Note 10
Note 10
ZoomingADC for sensing data acquisition
S
= 125 kHz. Input impedance is proportional to 1/f
Min
6
IN,MAX
285/210
104/80
4.0/2.0
3.2/1.6
2.4/1.1
1.5/0.7
67/59
98/91
±
0.483
Typ
±
±
±
±
1.88
OSR
205
340
365
133
517
0.15
±
78
72
0.6
1.5
0.5
0.5
= ±(V
1
ELCONV
REF
SX8724S
ELCONV
/ 2) (OSR / OSR+1).
www.semtech.com
can be set to 1, 2, 4 or 8.
Max
DATASHEET
16
must be at least 2.
S
fs cycles
fs cycles
fs cycles
= 500 kHz
S
Unit
kSps
kSps
mW
mW
mW
mW
Bits
LSB
LSB
LSB
LSB
LSB
.
μA
μA
μA
μA
μV
μV
μV
dB
dB
%