AD9937 datasheet(4/44 Pages) AD

4 / 44 page

REV. 0

–4–

AD9937

ANALOG SPECIFICATIONS (AVDD = 3 V, f

CLI = 12 MHz, –25 C to +85 C, unless otherwise noted.)

Parameter

Min

Typ

Max

Unit

Notes

CDS

Allowable CCD Reset Transient

500

Input signal characteristics.

Max Input Range before Saturation

1.0

V p-p

Max CCD Black Pixel Amplitude

±100

VARIABLE GAIN AMPLIFIER (VGA)

Max Output Range

2.0

V p-p

Gain Control Resolution

Bits

Gain Monotonicity

Guaranteed

Gain Range

Low Gain (VGA Code 0)

5.3

Max Gain (VGA Code 1023)

41.1

BLACK LEVEL CLAMP

Clamp Level Resolution

255

Steps

Clamp Level

LSB measured at ADC output.

Min Clamp Level

LSB

Max Clamp Level

63.75

LSB

A/D CONVERTER

Resolution

Bits

Differential Nonlinearity (DNL)

±0.4

±1.0

LSB

No Missing Codes

Guaranteed

Full-Scale Input Voltage

2.0

VOLTAGE REFERENCE

Reference Top Voltage (REFT)

2.0

Reference Bottom Voltage (REFB)

1.0

SYSTEM PERFORMANCE

Includes entire signal chain.

Gain Accuracy

Low Gain (VGA Code 17)

Gain = (0.035

× Code) + 5.4 dB

Max Gain (VGA Code 1023)

40.2

41.2

42.2

Peak Nonlinearity, 500 mV Input Signal

0.1

12 dB gain applied.

Total Output Noise

0.3

LSB rms

AC ground input, 6 dB gain applied.

Power Supply Rejection (PSR)

Measured with step change on supply.

*Input signal characteristics defined as follows:

1V MAX

INPUT

SIGNAL RANGE

100mV MAX

OPTICAL

BLACK PIXEL

500mV TYP

RESET

TRANSIENT

Specifications subject to change without notice.

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