AS8525 datasheet(11/38 Pages) AMSCO

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AS8525

Datasheet - Electrical Character i s t ics

6.2.1 Programmable Gain Amplifier (PGA)

Table 6. Programmable Gain Amplifier (PGA)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Gain

DC gain

V/V

100

VIN_AMP

Input signal range

V(HRSHH)-V(HRSHL)

Gx represents typical gain value (x=1,2,3,4)

after Offset trimming

±0.18*5/

VICM_AMP

Input common-mode voltage

V(HRSHH), VSUP2

4.5

VOCM_AMP

Output common-mode voltage

When AVCC=3.3V

Only for information

1.5

1.65

1.8

When AVCC=5V

Only for information

2.3

2.5

2.7

εp1,G

Gain error

Temperature: -40 to +125ºC

@ VSUP2 = 18V

Post system calibration

±0.5

εp2,G

At room temperature

V(HRSHH), VSUP2=12V

Without system calibration

±5

TSettle_AMP

Time for settling to within 0.05%

final value

Includes the settling of chopper

µs

f-3dB AMP

3-dB bandwidth

650

kHz

250

150

VNDin_AMP

Input referred thermal noise density

(rms)

This excludes 1/f noise

Guaranteed by design

nV/

√Hz

THDAMP

Total harmonic distortion

Till 500Hz single-ended sinusoidal inputs

(after offset trimming).

Guaranteed by design

CL_AMP

Load capacitance

Single ended (Includes the capacitance

presented by the pad and pin of the host

chip)

100

VBG_AMP

Bandgap reference voltage

External low noise reference

1.176

1.2

1.224

VNDBG_AMP

Bandgap reference thermal noise

density

When noise bandwidth < signal bandwidth,

take it as 200nV/

√Hz (Noise Bandwidth /

Signal Bandwidth)

200

nV/

√Hz

VOSin_AMP

Input referred offset before

trimming

Refers to the standalone amplifier without

chopper stabilization

±37.5

VOSinT_AMP

Input referred offset after trimming

Refers to the standalone amplifier without

chopper stabilization;

Only at room temperature

±1.5

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