SPT7851 datasheet(4/9 Pages) CADEKA

4 / 9 page

REV. 1B October 2003

DATA SHEET

SPT7851

Typical Performance Characteristics

(TA = TMIN–TMAX, VDD1 = VDD2 = VDD3 = 3.3V, VREF– = 1.0V, VREF+ = 2.0V, Common Mode Voltage = 1.65, ƒCLK = 20 MSPS,

Bias1 = 90µA, Bias2 = 9.5µA, Differential Input, Duty Cycle = 50%; unless otherwise noted)

THD, SNR, SINAD vs. Temperature

Temperature ( °C)

-40

-25

THD, SNR, SINAD vs. Input Frequency

Input Frequency (MHz)

100

102

101

THD

SNR

SINAD

THD, SNR, SINAD vs. Sample Rate

Sample Rate (MSPS)

100

102

101

THD

SINAD

SNR

NOTE: Bias1 and Bias2 currents

optimized for each sample rate

150

100

125

Power Dissipation vs. Sample Rate

Sample Rate (MSPS)

100

102

101

NOTE: Bias1 and Bias2 currents

optimized for each sample rate

THD

SNR

SINAD

IBIAS1 (µA)

3.4

2.0

3.2

Bias1 Voltage vs. Bias1 Current

120

150

180

IBias1

VBias1

2.19

2.53

2.79

120

150

3.22

3.0

2.8

2.6

2.4

2.2

IBIAS2 (µA)

0.90

0.85

Bias2 Voltage vs. Bias2 Current

IBias2

VBias2

0.6975

0.7535

0.796

0.8295

0.8595

0.80

0.75

0.70

0.65

0.60

SPT7851 Datasheet(PDF) 4 Page - Cadeka Microcircuits LLC.

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