AD7846APZ datasheet(4/24 Pages) AD

4 / 24 page

AD7846

Rev. G | Page 4 of 24

Parameter1

J, A Versions

K, B Versions

Unit

Test Conditions/Comments

DIGITAL OUTPUTS

VOL (Output Low Voltage)

0.4

V max

ISINK = 1.6 mA

VOH (Output High Voltage)

4.0

V min

ISOURCE = 400 μA

Floating State Leakage Current

±10

μA max

DB0 to DB15 = 0 to VCC

Floating State Output Capacitance2

pF max

POWER REQUIREMENTS3

VDD

+11.4/+15.75

V min/V max

VSS

−11.4/−15.75

V min/V max

VCC

+4.75/+5.25

V min/V max

IDD

mA max

VOUT unloaded

ISS

mA max

VOUT unloaded

ICC

mA max

Power Supply Sensitivity4

1.5

LSB/V max

Power Dissipation

100

mW typ

VOUT unloaded

1 Temperature ranges as follows: J, K versions: 0°C to +70°C; A, B versions: −40°C to +85°C.

2 Guaranteed by design and characterization, not production tested.

3 The AD7846 is functional with power supplies of ±12 V. See the Typical Performance Characteristics section.

4 Sensitivity of gain error, offset error, and bipolar zero error to VDD, VSS variations.

AC PERFORMANCE CHARACTERISTICS

These characteristics are included for design guidance and are not subject to test. VREF+ = +5 V; VDD = +14.25 V to +15.75 V; VSS = −14.25 V

to −15.75 V; VCC = +4.75 V to +5.25 V; RIN connected to 0 V, unless otherwise noted.

Table 2.

Parameter

Limit at TMIN to TMAX (All Versions)

Unit

Test Conditions/Comments

Output Settling Time1

μs max

To 0.006% FSR, VOUT loaded, VREF− = 0 V, typically 3.5 μs

μs max

To 0.003% FSR, VOUT loaded, VREF− = –5 V, typically 6.5 μs

Slew Rate

V/μs typ

Digital-to-Analog Glitch

Impulse

nV-sec typ

DAC alternately loaded with 10…0000 and 01…1111,

VOUT unloaded

AC Feedthrough

0.5

mV p-p typ

VREF− = 0 V, VREF+ = 1 V rms, 10 kHz sine wave, DAC loaded

with all 0s

Digital Feedthrough

nV-sec typ

DAC alternately loaded with all 1s and all 0s. CS high

Output Noise Voltage

Density, 1 kHz to 100 kHz

nV/√Hz typ

Measured at VOUT, DAC loaded with 0111011…11,

VREF+ = VREF− = 0 V

LDAC = 0. Settling time does not include deglitching time of 2.5 μs (typ).

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