AFEDRI8201

SBWS017F − SEPTEMBER 2003 − REVISED AUGUST 2005

www.ti.com

3

AUXILIARY DAC CHARACTERISTICS

All specifications at +25

°C, AVDD = +3.3V, and DVDD = +1.8V, unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

Resolution

12

bits

Output voltage range

Input code 0x000

0.0

V

Output voltage range

Input code 0xFFF

2.75

V

Output impedance

1

k

Ω

Settling time

to 0.1% FSR

10

µs

Offset

±1

% of FSR

DC

Gain error

±5

% of FSR

DC

performance

Differential nonlinearity, DNL

Ensured monotonic

±0.5

LSB

performance

Integral nonlinearity, INL

After correcting for gain and offset errors

±2

LSB

Power-supply rejection ratio, PSRR

Input code 0x400, AVDD = 3.15VDC to 3.45VDC

60

dB

RECEIVE CHANNEL CHARACTERISTICS

All specifications at +25

Filter Bandwidth = 284kHz, and Input Signal = 10.7MHz, unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

DC Accuracy

Input impedance

6.25

k

Ω

Differential nonlinearity, DNL

−0.0244

±0.0122

+0.0244

%FSR

Integral nonlinearity, INL

−0.0244

±0.012

+0.0244

%FSR

Offset error

3

mV

Gain error

1

%FS

Gain = 1

1.0

V

Gain = 1.14

0.875

V

Gain = 1.33

0.75

V

Full-scale input level (peak differential)

Gain = 1.6

0.625

V

Full-scale input level (peak differential)

Gain = 2.0

0.5

V

Gain = 2.67

0.375

V

Gain = 4.0

0.25

V

Gain change settling time

Number of samples to achieve rated accuracy

2

Samples

Power-supply rejection ratio, PSRR

AVDD = 3.15VDC to 3.45VDC

70

dB

References

Negative reference, VREFN

1.1

1.25

1.4

V

Positive reference, VREFP

2.1

2.25

2.4

V

Common-mode voltage, VCM

1.8

V

AC Performance

Spurious-free dynamic range, SFDR

Input 455kHz, −1dBFS

76

dBc

Spurious-free dynamic range, SFDR

Input 10.7MHz, −1dBFS

76

86

dBc

Input 455kHz, −1dBFS

75

dB

Signal-to-noise ratio, SNR

Input 10.7MHz, −1dBFS

70

74

dB

Signal-to-noise ratio, SNR

In 3kHz bandwidth, −1dBFS, 10.7MHz, 20kHz from fundamental

102

dB

Aperture delay

2

ns

Aperture uncertainty

0.2

ps

Power Supply

Analog supply voltage, AVDD

3.15

3.3

3.45

V

Digital supply voltage, DVDD

1.71

1.8

1.89

V

Output driver supply voltage, IOVDD

3.15

3.3

3.45

V

Power dissipation

Normal operation

490

570

mW

Power dissipation

Power-down

20

mW

Digital I/O supply current

7

mA

Digital supply current

72

mA

Analog supply current

103

mA