WM2638
Production Data
ELECTRICAL CHARACTERISTICS
Test Conditions:
R
L
= 10kΩ, C
L
= 100pF. VDD = 5V
±
10%, V
REF
= 2.048V and VDD = 3V
±
10%, V
REF
= 1.024V over recommended operating free-air
temperature range (unless noted otherwise)
PARAMETER
Static DAC Specifications
Resolution
Integral non-linearity
Differential non-linearity
Zero code error
Gain error
D.c. power supply rejection ratio
Zero code error temperature coefficient
Gain error temperature coefficient
DAC Output Specifications
Output voltage range
Output load regulation
Power Supplies
Active supply current
I
DD
No load, V
IH
= VDD, V
IL
= 0V
VDD = 5V, V
REF
= 2.048V, Internal
Slow
Fast
VDD = 5V, V
REF
= 2.048V, External
Slow
Fast
VDD = 3V, V
REF
= 1.024V, Internal
Slow
Fast
VDD = 3V, V
REF
= 1.024V, External
Slow
Fast
See Note 8
No load,
all digital inputs 0V or VDD,
See Note 9
DAC code 32 to 4095, 10%-90%
Slow
Fast
See Note 10
DAC code 32 to 4095
Slow
Fast
See Note 11
Code 2047 to 2048
SNR
fs = 400ksps, f
OUT
= 1kHz,
BW = 20kHz
See Note 12
fs = 400ksps, f
OUT
= 1kHz,
BW = 20kHz
See Note 12
69
2kΩ to 10kΩ load
See Note 7
0
VDD - 0.4
V
%
INL
DNL
ZCE
GE
DC PSRR
See Note 1
See Note 2
See Note 3
See Note 4
See Note 5
See Note 6
See Note 6
0.5
10
10
12
bits
SYMBO
L
TEST CONDITIONS
MIN
TYP
MAX
UNIT
±
2.0
±
0.4
±
4.0
±
1
±24
±
0.6
LSB
LSB
mV
% FSR
mV/V
ppm/°C
ppm/°C
±
0.1
±
0.25
2.2
4.3
1.8
3.9
1.8
3.8
1.5
3.5
0.01
2.7
5.2
2.2
4.8
2.3
4.7
1.9
4.3
10
mA
mA
mA
mA
mA
mA
mA
mA
µA
Power down supply current
Dynamic DAC Specifications
Slew rate
1.5
8.0
V/µs
V/µs
Settling time
3.5
1.0
10
74
µs
µs
nV-s
dB
Glitch energy
Signal to noise ratio
Signal to noise and distortion ratio
SNRD
58
67
dB
WOLFSON MICROELECTRONICS LTD
PD Rev 1.0 July 99
3
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
