AD2S1200YST 查看數據表（PDF） - Analog Devices

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AD2S1200YST

12-Bit R/D Converter with Reference Oscillator

Analog Devices 

AD2S1200

AD2S1200–SPECIFICATIONS

Table 1. (AVDD = DVDD = 5.0 V ± 5% @ −40°C to +125°C CLKIN 8.192 MHz, unless otherwise noted.)

Parameter

Min Typ Max Unit

Conditions/Comments

Sin, Cos INPUTS1

Voltage

3.24 3.6

3.96 V p-p

Sinusoidal waveforms, differential inputs

Input Bias Current

2

µA

VIN = 3.96 V p-p

Input Impedance

1.0

MΩ

VIN = 3.96 V p-p

Common Mode Volts

100 mV Peak CMV @ SinLO, CosLO, with respect to REFOUT @ 10 kHz

Phase Lock Range

−45

+45 Degrees Sin/Cos vs. EXC output

ANGULAR ACCURACY

Angular Accuracy

±11 arc min Zero acceleration Y Grade

±22 arc min Zero acceleration W Grade

Resolution

12

Bits

Guaranteed no missing codes

Linearity INL

2

LSB

Zero acceleration, 0 to 1,000 rps

Linearity DNL

0.3

LSB

Guaranteed monotonic

Repeatability

1

LSB

Hysteresis

1

LSB

VELOCITY OUTPUT

Velocity Accuracy

2

LSB

Zero acceleration

Resolution

11

Bits

Linearity

1

LSB

Guaranteed by design 2 LSB max

Offset

0

1

LSB

Zero acceleration

Dynamic Ripple

1

LSB

Zero acceleration

DYNAMIC PERFORMANCE

Bandwidth

1,500 1,700 2,000 Hz

Fixed

Tracking Rate

1,000 rps

Guaranteed by design. Tested to 800 rps.

Acceleration Error

30

arc min At 10,000 rps2

Settling Time 179° Step Input

4.72 5.0

ms

To within stated accuracy

Settling Time 179° Step Input

3.7

3.8

ms

To within one degree

EXC, EXC OUTPUTS

Voltage

3.34 3.6

3.83 V p-p

Load ±100 µA

Center Voltage

2.39 2.47 2.52 V

Frequency

10

kHz

FS1 = high, FS2 = high

12

kHz

FS1 = high, FS2 = low

15

kHz

FS1 = low, FS2 = high

20

kHz

FS1 = low, FS2 = low

EXC/EXC DC Mismatch

35

mV

THD

−60 −55 dB

First five harmonics

FAULT DETECTION BLOCK

LOS

Sin/Cos Threshold

2.86 2.92 3.0

V p-p

DOS and LOT go low when Sin or Cos fall below

threshold.

Angular Accuracy (Worst Case)

45

Degrees LOS indicated before angular output error exceeds limit

(3.96 V p-p input signal and 2.9 V LOS threshold).

Angular Latency (Worst Case)

90

Degrees Maximum electrical rotation before LOS is indicated

(3.96 V p-p input signal and 2.9 V LOS threshold).

Time Latency

125 µs

1 The voltages Sin, SinLO, Cos, and CosLO relative to AGND must always be between 0.2 V and AVDD.

Rev. 0 | Page 4 of 24

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