Datasheet

ADS8327
ADS8328
SLAS415E – APRIL 2006– REVISED JANUARY 2011 www.ti.com
SPECIFICATIONS
T
A
= –40°C to 85°C, +VA = 2.7 V to 3.6 V, +VBD = 1.65 V to 1.5 × (+VA), V
REF
= 2.5 V, and f
SAMPLE
= 500 kHz, unless
otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG INPUT
Full-scale input voltage
(1)
+IN – (–IN) or (+INx – COM) 0 +V
REF
V
+IN, +IN0, +IN1 AGND – 0.2 +VA + 0.2
Absolute input voltage V
–IN or COM AGND – 0.2 AGND + 0.2
Input capacitance 40 45 pF
No ongoing conversion,
Input leakage current –1 1 nA
DC Input
At dc 108
Input channel isolation, ADS8328 only dB
V
I
= ±1.25 V
PP
at 50 kHz 101
SYSTEM PERFORMANCE
Resolution 16 Bits
No missing codes 16 Bits
ADS8327IB,
–2 ±1.2 2
ADS8328IB
INL Integral linearity LSB
(2)
ADS8327I, ADS8328I –3 ±2 3
ADS8327IB,
–1 ±0.6 1
Differential
ADS8328IB
DNL LSB
(2)
linearity
ADS8327I, ADS8328I –1 ±1 2
ADS8327IB,
–0.5 ±0.1 0.5
ADS8328IB
E
O
Offset error
(3)
mV
ADS8327I, ADS8328I –0.8 ±0.1 0.8
Offset error drift 0.2 ppm/°C
E
G
Gain error –0.25 –0.07 0.25 %FSR
Gain error drift 0.3 ppm/°C
At dc 70
CMRR Common-mode rejection ratio dB
V
I
= 0.4 V
PP
at 1 MHz 50
Noise 33 mV RMS
PSRR Power-supply rejection ratio At FFFFh output code
(3)
78 dB
SAMPLING DYNAMICS
t
CONV
Conversion time 18 CCLK
t
SAMPLE1
Manual trigger 3
Acquisition time CCLK
t
SAMPLE2
Auto trigger 3
Throughput rate 500 kHz
Aperture delay 5 ns
Aperture jitter 10 ps
Step response 100 ns
Overvoltage recovery 100 ns
(1) Ideal input span, does not include gain or offset error.
(2) LSB means least significant bit.
(3) Measured relative to an ideal full-scale input [+IN – (–IN)] of 2.5 V when +VA = 2.7 V.
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Product Folder Link(s): ADS8327 ADS8328