WM8233 Datasheet, PDF (8/146 Pages) Wolfson Microelectronics plc – 70MSPS 6-Channel AFE with Sensor Timing Generation and LVDS/CMOS Data Output

WM8233
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD = LDOVDD = DBVDD = 3.3V, AGND = LDOGND = DBGND= 0V, T_A = 25C, MCLK= 35MHz unless otherwise stated.
PARAMETER
SYMBOL
TEST
MIN
CONDITIONS
Overall System Specification (including 10-bit ADC, PGA, Offset and CDS functions)
Conversion rate per channel
5
Full-scale input voltage
(see Note 1)
ADCFS=0, Max Gain
ADCFS=0, Min Gain
ADCFS=1, Max Gain
ADCFS=1, Min Gain
Input signal voltage range
V_IN
SF_INP=0
AGND
SF_INP=1
AGND
Input capacitance
Full-scale transition error
C_IN
Inputs to AGND
Gain = 0dB;
AGAIN[4:0] = 02(hex)
DGAIN[11:0] = 6AB(hex)
Zero-scale transition error
Gain = 0dB;
AGAIN[4:0] = 02(hex)
DGAIN[11:0] = 6AB(hex)
Differential non-linearity
DNL
10-bit
Integral non-linearity (pk-pk/2)
INL
10-bit
Channel to channel gain matching Min Gain
Max Gain
Output noise
10-bit, Unity Gain
(Unused channels grounded)
Channel to channel crosstalk
10-bit
TYP
0.12
2.0
0.18
3.0
10
20
20
+/-0.5
+/-1
5
15
0.5
+/-0.5
MAX
UNIT
35
AVDD
1.2
12
MSPS
Vp-p
Vp-p
Vp-p
Vp-p
V
V
pF
mV
mV
+/-1.5
+/-4
2.5
LSB
LSB
%
%
LSB rms
LSB
Channel to channel offset
matching
Programmable Gain Amplifier
Total Resolution (Ga + Gd)
Analogue Gain
Max gain, each channel (Ga)
Min gain, each channel (Ga)
Digital Gain
Max gain, each channel (Gd)
Min gain, each channel (Gd)
Max gain, each channel
(Ga + Gd)
Min gain, each channel
(Ga + Gd)
Analogue to Digital Converter
Resolution
Speed
BLC disabled
70
210
mV
GT
Ga
Ga _MAX
Ga _MIN
Gd
Gd _MAX
Gd _MIN
GT_MAX
GT_MIN
AGAIN[4:0] = 1F(hex)
AGAIN[4:0] = 0(hex)
DGAIN[11:0] = FFF(hex)
DGAIN[11:0] = 400 (hex)
AGAIN[4:0] = 1F(hex)
DGAIN[11:0] = FFF(hex)
AGAIN[4:0] = 0(hex)
DGAIN[11:0] = 400 (hex)
12
0.6 + 0.3 * AGAIN[4:0]
8.00
9.9
11.43
0.44
0.6
0.77
DGAIN[11:0] / 2¹¹
2
0.5
19.8
0.3
16
70
bits
V/V
V/V
V/V
V/V
V/V
V/V
V/V
V/V
bits
MSPS
8
Rev 4.7