xe8802 Semtech Corporation, xe8802 Datasheet - Page 129

• Manufacturer Part Number: xe8802
• Description: Data Acquisition Soc With 16+10 Bit Zoomingadc? Embedded Risc Controller And Lcd Driver
• Manufacturer: Semtech Corporation

17.8.2
Unless otherwise specified: Temperature T
frequency f
IB_AMP_PGA[1:0] = '11'). For resolution n = 12 bits: OSR = 32 and N
© Semtech 2006
PARAMETER
ANALOG
CHARACTERISTICS
Differential Input Voltage Ranges
Reference Voltage Range
PROGRAMMABLE
AMPLIFIERS (PGA)
Total PGA Gain, GD
Gain Setting Precision (each stage)
Gain Temperature Dependence
Offset
Offset Setting Precision (PGA2 or 3)
Offset Temperature Dependence
Input Impedance
Output RMS Noise
ADC STATIC PERFORMANCE
Resolution, n
No Missing Codes
Gain Error
Offset Error
Integral Non-Linearity, INL
Differential Non-Linearity, DNL
Power Supply Rejection Ratio, PSRR
DYNAMIC PERFORMANCE
Sampling Frequency, f
Conversion Time, T
Throughput Rate (Continuous Mode),
1/T
Nbr of Initialization Cycles, N
Nbr of End Conversion Cycles, N
PGA Stabilization Delay
DIGITAL OUTPUT
ADC Output Data Coding
CONV
V
V
PGA1 Gain, GD
PGA2 Gain, GD
PGA3 Gain, GD
PGA2 Offset, GDoff
PGA3 Offset, GDoff
PGA1
PGA2, PGA3
PGA1
PGA2
PGA3
Resolution n = 16 Bits
Resolution n = 16 Bits
S
IN
REF
Specifications
= 500kHz, Overall PGA gain GD
= (V
= (V
INP
REFP
CONV
TOT
- V
S
– V
INN
)
1
2
3
REFN
INIT
2
3
)
INPUT
GAIN
END
A
-127/12
-2.42
-24.2
-2.42
1500
MIN
= +25°C, V
150
150
0.5
-3
-1
-3
1
1
0
6
3
0
0
TOT
= 1, offsets GDOff
XE8802 Sensing Machine Data Acquisition MCU
VALUE
DD
±0.15
1027
OSR
TYP
±0.5
±0.5
±1.0
±0.5
3.76
0.49
205
340
365
133
±5
±5
±1
78
72
= +5V, GND = 0V, V
17-17
+127/12
127/12
+2.42
+24.2
+2.42
ELCONV
MAX
1000
V
10
10
+3
+1
+3
16
2
5
DD
2
= GDOff
with ZoomingADC™ and LCD driver
= 4. For resolution n = 16 bits: OSR = 512 and N
cycles/f
cycles/f
% of FS
ppm/°C
ppm/°C
UNITS
cycles
cycles
cycles
REF
kSps
kSps
LSB
LSB
LSB
V/V
V/V
V/V
V/V
V/V
V/V
Bits
kHz
mV
mV
kΩ
kΩ
kΩ
µV
µV
µV
dB
dB
3
%
%
V
V
= 0. Power operation: normal (IB_AMP_ADC[1:0] =
= +5V, V
S
S
COMMENTS/CONDITIONS
Gain = 1, OSR = 32 (Note 1)
Gain = 100, OSR = 32
Gain = 1000, OSR = 32
See Table 17-14
See Table 17-15
Step=1/12 V/V, See Table 17-17
Step=0.2 V/V, See Table 17-16
Step=1/12 V/V, See Table 17-18
(Note 2)
PGA1 Gain = 1 (Note 3)
PGA1 Gain = 10 (Note 3)
Maximal gain (Note 3)
(Note 4)
(Note 5)
(Note 6)
(Note 7)
(Note 8)
(Note 9)
n = 16 bits (Note 10)
(Note 11)
(Note 12)
V
V
n = 12 bits (Note 14)
n = 16 bits (Note 14)
n = 12 bits, f
n = 16 bits, f
(Note 15)
Binary Two’s Complement
See Table 17-24 and Table 17-25
DD
DD
IN
= 5V ± 0.3V (Note 13)
= 3V ± 0.3V (Note 13)
= 0V, RC frequency f
S
S
= 500kHz
= 500kHz
RC
= 2MHz, sampling
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ELCONV
= 2.