3

UCC1926

UCC2926

UCC3926

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Programmable Amplifier Section (cont.)

PSRR

60

dB

60

dB

Common Mode Input Range

0.5

2.5

V

–100

–350

nA

20

350

nA

INV – NI = 20mV, IO = 0

µA

100

200

mV

INV – NI = 20mV, IO = 200

µA

150

300

mV

NI – INV = 20mV, IO = –200

1.2

2

V

NI – INV = 20mV, VDD = 14V

6

7

8

V

OUT = 1.5V

1

3.5

mA

OUT = 1.5V

– 250

– 325

µA

Overcurrent Comparator Section

OC Comp Threshold

OCREF = 2V

2.00

2.05

V

Common Mode Range

(Note 1)

0.1

2

V

Hysteresis

20

40

60

mV

VOL

(OCREF – OUT) = 100mV, IOC = 100

µA

0.2

0.4

V

VOH, VDD – OC

(OUT – OCREF) = 100mV, IOC = –100

µA

0.2

0.4

V

Propagation Delay

(OUT – OCREF) =

± 100mV

90

175

ns

Note 1: Guaranteed by design. Not 100% tested in prodcution.

PIN DESCRIPTIONS

AOP: Positive output of the converted current signal.

Voltage from AOP to AON is the absolute value of the

transimpedance amplifier output. AOP may show some

“chopping”

noise.

The

differential

to

single-ended

conversion removes the common-mode noise between

AOP and AON.Some high frequency filtering of AOP to

GND can reduce the fast transient spikes. The output

stage of AOP is shown in Figure 1.

AON: Negative output of the converted current signal.

Voltage from AOP to AON is the absolute value of the

transimpedance amplifier output. AON may show some

“chopping”

noise.

The

differential

to

single-ended

conversion removes the common-mode noise between

AOP and AON. Some high frequency filtering of AON to

GND can reduce the fast transient spikes. Note that AON

is above GND voltage. The output stage of AON is shown

in Figure 1.

CSN: Input connection to one end of the internal current

sense shunt resistor. Nominal resistance from CSP to

CSN is 1.3m

Ω. The current shunt has a nominal

temperature coefficient of 3530 ppm/°C. The temperature

adjusted autozero gain is designed to cancel this temp

co. effect. CSN may be referenced to GND for low side

sensing or to VDD for high side sensing. CSP – CSN

may vary from ±75mV from either GND or VDD. Current

into CSN is defined as negative.

CSP: Input connection to the other end of the internal

current sense shunt resistor. Nominal resistance from

CSP to CSN is 1.3mW. The current shunt has a nominal

temperature coefficient of 3530 ppm/°C. The temperature

adjusted autozero gain should cancel this temp co. effect.

CSP may be referenced to GND for low side sensing or

to VDD for high side sensing. CSP – CSN may vary from

±75mV from either GND or VDD. Current into CSP is

defined as positive.

15K

100

AOP, AON

VDD

250

µA

ESD DIODE

CROSS SWITCH

IMPEDANCE

Figure 1. AOP and AON output stage.