ADS8406 Datasheet, PDF (3/25 Pages) Burr-Brown (TI) – 16-BIT, 1.25 MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICRO POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE

ADS8406
www.ti.com
SLAS426A – AUGUST 2004 – REVISED DECEMBER 2004
SPECIFICATIONS
T_A = –40°C to 85°C, +VA = 5 V, +VBD = 3 V or 5 V, V_ref = 4.096 V, f_SAMPLE = 1.25 MHz (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
ANALOG INPUT
Full-scale input voltage ⁽¹⁾
Absolute input voltage
Input capacitance
+IN – (–IN)
+IN
–IN
–V_ref
–0.2
–0.2
V_ref
V_ref + 0.2
V_ref + 0.2
25
Input leakage current
0.5
SYSTEM PERFORMANCE
Resolution
16
ADS8406I
15
No missing codes
ADS8406IB
16
INL
Integral linearity ⁽²⁾⁽³⁾
ADS8406I
ADS8406IB
–4
±2
4
–2
±1
2
DNL Differential linearity
ADS8406I
ADS8406IB
–2
±1
2
–1
±0.5
1.25
E_O
Offset error⁽⁴⁾
ADS8406I
ADS8406IB
–2.5
±1
2.5
–1.5
±0.5
1.5
E_G
Gain error⁽⁴⁾⁽⁵⁾
ADS8406I
ADS8406IB
–0.12
–0.098
0.12
0.098
CMRR Common mode rejection ratio
At dc (0.2 V around V_ref/2)
80
+IN – (–IN) = 1 V_pp at 1 MHz
80
At 7FFFh output code, +VA
PSRR DC Power supply rejection ratio
= 4.75 V to 5.25 V, V_ref =
2
4.096 V ⁽⁴⁾
SAMPLING DYNAMICS
Conversion time
500
650
Acquisition time
150
Throughput rate
1.25
Aperture delay
2
Aperture jitter
25
Step response
100
Overvoltage recovery
100
DYNAMIC CHARACTERISTICS
THD Total harmonic distortion ⁽⁶⁾
V_IN = 8 V_pp at 100 kHz
–95
V_IN = 8 V_pp at 500 kHz
–90
SNR Signal-to-noise ratio
V_IN = 8 V_pp at 100 kHz
90
SINAD Signal-to-noise + distortion
V_IN = 8 V_pp at 100 kHz
88
SFDR Spurious free dynamic range
V_IN = 8 V_pp at 100 kHz
95
V_IN = 8 V_pp at 500 kHz
93
-3dB Small signal bandwidth
5
EXTERNAL VOLTAGE REFERENCE INPUT
Reference voltage at REFIN, V_ref
Reference resistance ⁽⁷⁾
2.5 4.096
4.2
500
UNIT
V
V
pF
nA
Bits
Bits
LSB
LSB
mV
mV
%FS
dB
LSB
ns
ns
MHz
ns
ps
ns
ns
dB
dB
dB
dB
MHz
V
kΩ
(1) Ideal input span, does not include gain or offset error.
(2) LSB means least significant bit
(3) This is endpoint INL, not best fit.
(4) Measured relative to an ideal full-scale input [+IN – (–IN)] of 8.192 V
(5) This specification does not include the internal reference voltage error and drift.
(6) Calculated on the first nine harmonics of the input frequency
(7) Can vary ±20%
3