2

5/24/00

SPT7938

ELECTRICAL SPECIFICATIONS

TEST

TEST

SPT7938

PARAMETERS

CONDITIONS

LEVEL

MIN

TYP

MAX

UNITS

Resolution

12

Bits

DC Accuracy

Integral Nonlinearity

V

±3

LSB

Differential Nonlinearity

V

±1

LSB

No Missing Codes

VI

Guaranteed

Analog Input

Input Voltage Range

VI

V

Input Resistance

V

25

k

Ω

Input Capacitance

V

5.0

pF

Input Bandwidth

V

250

MHz

V

0.035

%FS

V

–0.12

%FS

Conversion Characteristics

Maximum Conversion Rate

VI

40

MHz

Minimum Conversion Rate

V

1

MHz

Pipeline Delay (Latency)

IV

14

Clock Cycles

Aperture Delay Time

V

1.0

ns

Aperture Jitter Time

V

5.0

ps(p-p)

25

ns

Reference Input

Resistance

VI

420

465

520

Ω

Voltage Range

IV

3.0

V

IV

0.0

2.0

V

V

2.0

4.0

5.0

V

Dynamic Performance

Effective Number of Bits

I

9.9

10.1

Bits

IV

9.4

10.1

Bits

Signal-to-Noise Ratio

(without Harmonics)

I

61.2

62.5

dB

IV

58.0

62.5

dB

1

2

Note: 1. Operation at any Absolute Maximum Rating is not implied. See Electrical Specifications for proper nominal

applied conditions in typical applications.

Supply Voltages

Input Voltages

AGND – DGND ..................................................

±100 mV

Output

Digital Outputs ....................................................... 10 mA

Temperature

Operating Temperature ............................. –40 to +85

°C

Junction Temperature ......................................... +175

°C

Lead Temperature, (soldering 10 seconds) ........ +300

°C

Storage Temperature ............................... –65 to +150

°C