Instruction Manual

ANALOG CHARACTERISTICS
(T
A
= T
MIN
to T
MAX
; VA+ = 5V
±
10%; VA- = -5 V
±
10%; VD+ =
3.3V
±
5%; VREF+ = 2.5V (external); VREF- = 0V; f
CLK
= 32.768kHz ; Bipolar Mode; R
source
= 1k
Ω
with a
10nF to AGND at AIN; Analog input channel AIN1+; AIN- = AGND; unless otherwise specified.) (Notes 1, 2)
CS5506/8-B CS5508-S
Parameter* Min Typ Max Min Typ Max Units
Specified Temperature Range -40 to +85 -55 to +125
°
C
Accuracy
Linearity Error - 0.0007 0.0015 - 0.0015 0.003
±
%FS
Differential Nonlinearity
(No Missing Codes) 20 - - 20 - -
Bits
Full Scale Error (Note 3) -
±
4
±
32
-
±
8
±
32
LSB
20
Full Scale Drift (Note 4) -
±
8
--
±
32
-LSB
20
Unipolar Offset (Note 3) -
±
8
±
32
-
±
16
±
64
LSB
20
Unipolar Offset Drift (Note 4) -
±
8
--
±
16
-LSB
20
Bipolar Offset (Note 3) -
±
4
±
16
-
±
8
±
32
LSB
20
Bipolar Offset Drift (Note 4) -
±
4
--
±
8
-LSB
20
Noise (Referred to Output) - 2.6 - - 2.6 - LSB-
rms
20
Unipolar Mode Bipolar Mode
mV LSB’s % FS ppm FS LSB’s % FS ppm FS
0.596 0.25 0.0000238 0.24 0.13 0.0000119 0.12
1.192 0.50 0.0000477 0.47 0.26 0.0000238 0.24
2.384 1.00 0.0000954 0.95 0.50 0.0000477 0.47
4.768 2.00 0.0001907 1.91 1.00 0.0000954 0.95
9.537 4.00 0.0003814 3.81 2.00 0.0001907 1.91
VREF = 2.5V
CS5506/8; 20-Bit Unit Conversion Factors
DYNAMIC CHARACTERISTICS
Parameter Symbol Ratio Units
Modulator Sampling Frequency f
s
f
clk
/2 Hz
Output Update Rate (CONV = 1) f
out
f
clk
/1622 Sps
Filter Corner Frequency f
-3dB
f
clk
/1928 Hz
Settling Time to
1
⁄
2
LSB (FS Step)
t
s
1/f
out
s
CS5505/6/7/8
DS59F7 3
CS5505/6/7/8
DS59F7 3