ADD8708 datasheet(3/16 Pages) AD

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ADD8708

Rev. 0 | Page 3 of 16

ELECTRICAL CHARACTERISTICS

VDD = 16 V, TA @ 25°C, unless otherwise noted.

Table 1.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

GAMMA CURVE CHARACTERISTICS

Accuracy

RACC1

0.1

0.4

Programming Resolution

RRES

500 segments

0.2

Total Resistor String

RTOTAL

kΩ

BUFFER CHARACTERISTICS

OUTPUTS

Output Voltage Range (Ch18 to Ch10)

VOUT

IL = 100 µA

1.4

VDD

Output Voltage Range (Ch9 to Ch1)

VOUT

IL = 100 µA

VDD

− 1.4

Output vs. Load (Ch18, Ch17, Ch2, Ch1)

∆VOUT2

IL = 20 mA

Output vs. Load (Ch16 to Ch3)

∆VOUT2

IL = 5 mA

INPUTS

Offset Voltage

VOS

Offset Voltage Drift

∆VOS/∆T

−40°C ≤ TA ≤ +105°C

µV/°C

Input Bias Current

−40°C ≤ TA ≤ +105°C

0.5

1.5

µA

Input Voltage Range (Ch18 to Ch10)

VIN

1.4

VDD

Input Voltage Range (Ch9 to Ch1)

VIN

VDD

− 1.4

DYNAMIC PERFORMANCE

Slew Rate

RL = 10 kΩ, CL = 200 pF

V/µs

Bandwidth

–3 dB, RL = 10 kΩ, CL = 200 pF

4.5

MHz

Settling Time to 0.1%

1 V, RL = 10 kΩ, CL = 200 pF

1.1

µs

Phase Margin

Фo

RL = 10 kΩ, CL = 200 pF

Degrees

Power Supply Rejection Ratio

PSRR

VDD = 7 V to 17 V,

−40°C ≤ TA ≤ +105°C

VOLTAGE REGULATOR

Programmable Range

VREG OUT

VDD

− 0.6

Initial Regulator Accuracy

VACC

No load; VREG OUT = 14.4V

0.4

1.5

Dropout Voltage

VDO

IL = 100 µA

100

150

IL = 5 mA

310

350

Line Regulation

REGLINE

VIN = 8.5 V to 16.5 V, VOUT = 8 V

0.01

0.20

%/V

Load Regulation

REGLOAD

IO = 100 µA to 10 mA

0.02

0.10

%/mA

Maximum Load Current

−40°C ≤ TA ≤ +105°C

Feedback Reference Voltage

VREF

1.2

Feedback Input Bias Current

IB FB

−40°C ≤ TA ≤ +105°C

-150

150

SYSTEM ACCURACY

Total Error3, 4

VTotal Error

−40°C ≤ TA ≤ +105°C

0.5

POWER SUPPLY

Supply Voltage

VDD

7.5

Supply Current

ISY

No load;

−40°C ≤ TA ≤ +105°C

9.5

1 Gamma curve accuracy includes resistor matching and buffer errors, but excludes the regulator error.

2 ∆VOUT is the shift from the desired output voltage under the specified current load.

3 Total error is the difference between the designed and actual output voltage divided by the actual regulator output voltage or full-scale voltage.

4 Total error includes regulator error, resistor string error, bias current effects, and buffer offset voltage.

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