WM8148 Просмотр технического описания (PDF) - Wolfson Microelectronics plc
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WM8148 Datasheet PDF : 43 Pages
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WM8148
Production Data
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS
AVDD = 4.75 to 5.25V, DVDD1 and DVDD2 = 2.97 to 5.25V, AGND = DGND = 0V, TA = 0 to 70°C, MCLK = 48MHz unless
otherwise stated (AVDD denotes the voltage applied to all AVDD pins).
PARAMETER
SYMBOL
TEST
MIN
CONDITIONS
Overall System Performance Including 12-bit ADC, PGA, Offset and CDS Functions
NO MISSING CODES GUARANTEED
Full-scale input voltage range
Max Gain
Gain = 1.0
Min Gain
Zero-scale transition error
Gain = 1.0
Full-scale transition error
Gain = 1.0
Differential non-linearity
DNL
Gain = 1.0
Integral non-linearity
INL
Gain = 1.0
ANALOGUE SPECIFICATION
Input Multiplexer
Channel to channel gain matching
Input voltage range
VIN
0
References
Upper reference voltage
VRT
3.00
Lower reference voltage
VRB
1.50
Input return bias voltage
VRX
1.50
Diff. reference voltage (VRT-VRB)
VRTB
1.30
Output resistance VRT, VRB, VRX
VRT, VRB, VRX
buffers enabled
Resistance VRT to VRB
VRT, VRB buffers
500
disabled
VRX Hi-Z leakage current
VRX buffer disabled
VRLC/Reset-Level Clamp (RLC)
RLC switching impedance
VRLC Hi-Z leakage current
VRLC = 0 to AVDD
VRLC DAC resolution
4
VRLC DAC step
AVDD = 5V
290
VRLC short-circuit current
VRLC output resistance
VRLC = AVDD
VRLC = 0V
VRLC = other
Offset DAC
Resolution
8
Differential non-linearity
DNL
-0.25
Integral non-linearity
INL
-0.50
Output voltage
Code 00(hex)
Code FF(hex)
Programmable Gain Amplifier. Monotonicity Guaranteed
Resolution
6
Max gain, each channel
GMAX
Min gain, each channel
GMIN
Gain error, each channel
TYP
0.413
3.0
4.13
20
20
0.25
1.0
1
3.30
1.80
1.75
1.50
2
800
75
333
5
80
80
5
0.05
0.10
-200
200
7.4
0.74
2
MAX
UNIT
V
V
V
mV
mV
1.00
LSB
LSB
AVDD
3.60
2.10
2.00
1.70
1100
1
1
370
0.25
0.50
5
%
V
V
V
V
V
Ω
Ω
µA
Ω
µA
bits
mV/step
mA
Ω
Ω
Ω
bits
LSB
LSB
mV
mV
bits
V/V
V/V
%
WOLFSON MICROELECTRONICS LTD
PD Rev 4.0 April 1999
5
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