AS8510
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.4.1
Differential Input Amplifier for Current Channel
Parameter
Input voltage range
Input current
1, 11
Table 15. Differential Input Amplifier for Current Channel
Symbol
V
IN
_AMP
I
IN
_AMP
ICM
G = G1
G = G2
G = G3
G = G4
e
f
P
_AMP
εT1
V
OSDRIFT
Vos
Vos_ch
VNdin
THD
Notes:
1. Leakage test accuracy is limited by tester resource accuracy and tester hardware.
2. For gain 100 PGA input common mode is 0V and the minimum supply is 3.15V.
3. The measurement ranges are referred only by the gain of input amplifier, while other parameters such as bandwidth etc. are pro-
grammed independently.
4. This parameter is not measured directly in production. It is measured indirectly via gain measurements of the whole path. It is guaran-
teed by design.
5. Pole frequency of input amplifier changes with GAIN. The number is valid for the gain at G1, while the bandwidth will be higher for other
ranges. This parameter is not measured in production.
6. Based on device evaluation. Not tested.
7. These offsets are cancelled if chopping enabled (default).
8. Noise density calculated by taking system bandwidth as 150Hz.
9. Refer to Measurement Ranges shown in
Table 13.
10. No impact on the measurement path. If the chopping is enabled, both the offset and offset drift will be eliminated.
11. For negative input voltages up to -160mV below ground, Input leakage is typically -20nA @ 65ºC due to forward conductance of
protection diode.
Noise density
4, 8
Conditions
RSHH and RSHL
RSHH and RSHL@ +160mV input
voltage at 125ºC with PGA
2
Min
-160
-50
Typ
Max
+160
Units
mV
nA
mV
2
-160
+300
50
Absolute input voltage range
Gain1
Gain2
Gain3
Gain4
3, 4, 9
3, 4, 9
3, 4, 9
3, 4, 9
I10
I200
I400
I1500
i = 1, 2, 3, 4
0.9 * Gi
15
6
100
40
25
5
1.1 * Gi
kHz
±0.3
350
%
µV
350
0
25
µV
LSB
nV/√Hz
dB
Gain deviation
Pole frequency
4, 5
Gain drift with temperature
Offset drift with temperature
Input referred offset
7, 10
-20ºC to +65ºC
Gain 5, 25, referenced to room
temperature
7, 10
After trim,
for temperature range -20 to +65ºC
Chopping enabled
Total harmonic distortion
For 150 Hz input signal
70
www.austriamicrosystems.com/AS8510
Revision 3.4
10 - 46
AMSCO [ AUSTRIAMICROSYSTEMS AG ]
