AD2S1205
Rev. A | Page 3 of 20
SPECIFICATIONS
AV
DD
= DV
DD
= 5.0 V ± 5% at −40°C to +125°C, CLKIN = 8.192 MHz ± 25%, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Conditions/Comments
Sin, Cos INPUTS
1
Voltage 2.3 3.15 4.0 V p-p
Sinusoidal waveforms, Sin − SinLO and Cos − CosLO,
differential inputs
Input Bias Current 12 μA V
IN
= 4.5 V
DC
, CLKIN = 10.24 MHz
Input Impedance 0.35 MΩ V
IN
= 4.5 V
DC
Common-Mode Voltage 100 mV peak CMV with respect to REFOUT/2 at 10 kHz
Phase-Lock Range −44 +44 Degrees Sin/Cos vs. EXC output
ANGULAR ACCURACY
Angular Accuracy ±11 Arc minutes Zero acceleration, Y grade
±22 Arc minutes Zero acceleration, W grade
Resolution 12 Bits Guaranteed no missing codes
Linearity INL 2 LSB Zero acceleration, 0 rps to 1250 rps, CLKIN = 10.24 MHz
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 maximum
Offset 0 1 LSB Zero acceleration
Dynamic Ripple 1 LSB Zero acceleration
DYNAMIC PERFORMANCE
Bandwidth 1000 2400 Hz
Tracking Rate 750 rps CLKIN = 6.144 MHz , guaranteed by design
1000 rps CLKIN = 8.192 MHz , guaranteed by design
1250 rps CLKIN = 10.24 MHz , guaranteed by design
Acceleration Error 30 Arc minutes At 10,000 rps, CLKIN = 8.192 MHz
Settling Time 179° Step Input 5.2 ms To within ±11 arc minutes, Y grade, CLKIN = 10.24 MHz
4.0 ms To within 1 degree, Y grade, CLKIN = 10.24 MHz
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, CLKIN = 8.192 MHz
12 kHz FS1 = high, FS2 = low, CLKIN = 8.192 MHz
15 kHz FS1 = low, FS2 = high, CLKIN = 8.192 MHz
20 kHz FS1 = low, FS2 = low, CLKIN = 8.192 MHz
EXC/EXC DC Mismatch
35 mV
THD −58 dB First five harmonics
FAULT DETEC TION BLOCK
Loss of Signal (LOS)
Sin/Cos Threshold 2.18 2.24 2.3 V p-p DOS and LOT go low when Sin or Cos fall below threshold
Angular Accuracy (Worst Case) 57 Degrees
LOS indicated before angular output error exceeds limit
(4.0 V p-p input signal and 2.18 V LOS threshold)
Angular Latency (Worst Case) 114 Degrees
Maximum electrical rotation before LOS is indicated
(4.0 V p-p input signal and 2.18 V LOS threshold)
Time Latency 125 μs
