AS8510 参数 Datasheet PDF下载

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

6.4.2

Differential Input Amplifier for Voltage Channel

Parameter

Input voltage range

Input current

1, 10

Table 16. Differential Input Amplifier for Voltage Channel

Symbol

VIN_

AMP

IIN_

AMP

ICM

G = G1

G = G2

G = G3

G = G4

e

f

P

_AMP

V

NDIN

THD

ε

T

1

V

OS

Vos_ch

V

OSDRIFT

Notes:

1. Input for the voltage channel can be as high as 1220mV, in this high input case PGA will be bypassed.

2. Leakage test accuracy is limited by tester resource accuracy and tester hardware, especially at low temperatures due to condensing

moisture.

3. For gain 100 PGA input common mode is 0V and the minimum supply is 3.15V.

4. The measurement ranges are referred only by the gain of input amplifier, while other parameters such as bandwidth etc. are pro-

grammed independently.

5. 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.

6. Pole frequency of input amplifier changes with changing the 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.

7. Noise density calculated by taking system bandwidth as 150Hz.

8. Based on device evaluation. Not tested.

9. No impact on the measurement path. If the chopping is enabled, both the offset and offset drift will be eliminated.

10. For negative input voltages up to -160mV below ground, Input leakage is typically -20nA @ 65ºC due to forward conductance of

protection diode.

Conditions

Min

-160

VBAT_IN, ETR, ETS @ +160mV input

voltage at 125ºC with PGA

3

Typ

Max

+160

Units

mV

nA

mV

2, 10

-50

2

-160

+300

100

40

25

5

50

Absolute input voltage range

Gain1

Gain2

Gain3

Gain4

4, 5

4, 5

4, 5

4, 5

Gain deviation

Pole frequency

Noise density

5, 6

i = 1, 2, 3, 4

0.9 * Gi

15

25

1.1 * Gi

kHz

nV/√Hz

dB

±0.3

350

0

350

%

µV

LSB

µV

5, 7

Total harmonic distortion

Gain drift with temperature

9

8

For 150Hz input signal

-20ºC to +65ºC

Gain 5, 25, referenced to room

temperature

After trim at +65ºC

Chopping enabled

9

70

Input referred offset

Offset drift with temperature

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