Production Data

WM2633

WOLFSON MICROELECTRONICS LTD

PD Rev 1.0 July 1999

5

Test Characteristics:

recommended operating free-air temperature range (unless noted otherwise).

PARAMETER

SYMBOL

TEST

CONDITIONS

MIN

TYP

MAX

UNIT

Glitch energy

Code 2047 to code 2048

5

nV-s

Signal to noise ratio

SNR

TA=25

°C See Note 12

73

78

dB

Signal to noise and distortion ratio

SNRD

TA=25

°C See Note 12

61

67

dB

Total harmonic distortion

THD

TA=25

°C See Note 12

-69

-62

dB

Spurious free dynamic range

SPFDR

25

°C See Note 12

63

74

dB

Reference Configured as Input

Reference input resistance

RREF

10

M

Ω

Reference input capacitance

CREF

55

pF

Reference feedthrough

+ 1.024V d.c., DAC code 0

-60

dB

Reference input bandwidth

DAC code 2048

Slow

Fast

500

900

kHz

kHz

Reference Configured as Output

Low reference voltage

1.003

1.024

1.045

V

High reference voltage

VDD > 4.75V

2.027

2.048

2.069

V

Output source current

1mA

Output sink current

-1

mA

Load Capacitance

100

pF

PSRR

-48

dB

Digital Inputs

High level input current

Input voltage = DVDD

1

µA

Low level input current

Input voltage = 0V

-1

µA

Input capacitance

8pF

Notes:

1. Integral non-linearity (INL) is the maximum deviation of the output from the line between zero and full scale excluding

the effects of zero code and full scale errors).

2. Differential non-linearity (DNL) is the difference between the measured and ideal 1LSB amplitude change

of any adjacent two codes. A guarantee of monotonicity means the output voltage changes in the same

direction (or remains constant) as a change in digital input code.

3. Zero code error is the voltage output when the DAC input code is zero.

4. Gain error is the deviation from the ideal full scale output excluding the effects of zero code error.

5. Power supply rejection ratio is measured by varying AVDD from 4.5V to 5.5V and measuring the

proportion of this signal imposed on the zero code error and the gain error.

6. Zero code error and Gain error temperature coefficients are normalised to full scale voltage.

7. Output load regulation is the difference between the output voltage at full scale with a 10k

Ω load and 2kΩ

load. It is expressed as a percentage of the full scale output voltage with a 10k

Ω load.