WM5615
Electrical Characteristics (over recommended operating free-air temperature range)
VDD = 5.0V ±5%, Vref = 2.048V unless otherwise stated.
Static DAC Specifications
PARAMETER
SYMBOL
CONDITIONS
(see note 1)
(see note 2)
(see note 3)
(see note 4)
MIN
TYP
MAX
UNIT
Resolution
Integral nonlinearity
Differential nonlinearity
Zero scale error (offset error) EZS
Zero scale error (offset error)
temperature coefficient
10
bits
LSB
LSB
LSB
ppm/oC
INL
DNL
±1
±0.5
±3
+0.1
3
Gain error
Gain error temperature
coefficient
EG
(see note 5)
(see note 6)
±3
LSB
ppm/oC
1
Power-supply rejection ratio PSRR
Offset (see notes 7 and 8)
Gain
RL = 100kΩ
0.1
0.1
LSB/V
V
Analogue full scale output
2Vref(1023/1024)
Notes:
5. Gain error is the deviation from the ideal output (Vref
- 1LSB) with an output load of 10kΩ, excluding the
effects of zero error.
6. Gain temperature coefficient is given by EG TC =
[EG (Tmax) - EG (Tmin)] /Vref x 106/(Tmax-Tmin).
7. Zero-scale offset error rejection ratio (EZS-RR) is
measured by varying the VDD from 4.5V to 5.5V DC
and measuring the proportion of this signal imposed
on the zero-code output voltage.
8. Gain error rejection ratio (EG-RR) is measured by
varying the VDD from 4.5 to 5.5 V DC and measuring
the proportion of this signal imposed on the full-scale
output voltage after subtracting the zero scale
change.
1. The relative accuracy or integral nonlinearity (INL),
sometimes referred to as linearity error, is the
maximum deviation ot the output from the line
between zero and full scale, excluding the effect of
zero code and full scale errors (see text).
2. The differential nonlinearity (DNL), sometimes
referred to as differential error, is the difference
between the measured and ideal LSB amplitude
change of any two adjacent codes. Monotonic means
the output voltage changes in the same direction (or
remains constant) as a change in the digital input
code.
3. Zero-scale error is the deviation from zero voltage
output when the digital input is zero (see text)
4. Zero-scale error temperature coefficient is given by
EZS TC = [EZS (Tmax) - EZS (Tmin)] /Vref x 106/ (Tmax-
Tmin)
Voltage Output (OUT)
PARAMETER
Voltage output range
Output load regulation accuracy
Output short circuit current
Output voltage, low level
Output voltage, high level
SYMBOL
VO
CONDITIONS
RL = 10kΩ
VO(OUT) = 2V RL=2kΩ
OUT to VDD or AGND
IO (OUT) <= 5mA
MIN
0
TYP
MAX
VDD-0.4
0.5
UNIT
V
LSB
mA
V
IOSC
VOL(low)
VOH(high)
20
0.25
IO (OUT) <= -5mA
4.75
V
Wolfson Microelectronics
3
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
