ADM2914-1ARQZ Datasheet ADM2914-1ARQZ, ADM2914-2ARQZ, ADM2914-2ARQZ-RL7 | P4-P6

Data Sheet ADM2914

Rev. F | Page 3 of 16

SPECIFICATIONS

= −40°C to +85°C. Typical values at T

= 25°C, unless otherwise noted. V

= 3.3 V, VLx = 0.45 V, VHx = 0.55 V,

LATCH

= V

SEL = V

, DIS = open, unless otherwise noted.

Table 1.

Parameter Min Typ Max Unit Test Conditions/Comments

SHUNT REGULATOR

Shunt Regulator Voltage, V

SHUNT

6.2 6.6 6.9 V I

= 5 mA

6.2 6.6 7.0 V T

= −40°C to +125°C

Shunt Regulator Load Regulation, ∆V

SHUNT

200 300 mV I

= 2 mA to 10 mA

SUPPLY

Supply Voltage, V

2.3 V

SHUNT

Minimum V

Output Valid, V

CCR(MIN)

1 V DIS = 0 V

Supply Undervoltage Lockout, V

CC(UVLO)

1.9 2 2.1 V DIS = 0 V, V

rising

Supply Undervoltage Lockout Hysteresis, ∆V

CC(HYST)

5 25 50 mV DIS = 0 V

Supply Current, I

62 100 A V

= 2.3 V to 6 V

REFERENCE OUTPUT

Reference Output Voltage, V

REF

0.985 1 1.015 V I

VREF

= ±1 mA

0.985 1 1.020 V T

= −40°C to +125°C

UNDERVOLTAGE/OVERVOLTAGE CHARACTERISTICS

Undervoltage/Overvoltage Threshold, V

UOT

492.5 500 507.5 mV

Undervoltage/Overvoltage Threshold to Output Delay, t

UOD

50 125 500 s VHx = V

UOT

− 5 mV or VLx = V

UOT

+ 5 mV

VHx, VLx Input Current, I

VHL

±15 nA

±30 nA T

= −40°C to +125°C

Timeout Period, t

UOTO

6 8.5 12.5 ms C

TIMER

= 1 nF

6 8.5 14 ms T

= −40°C to +125°C

LATCH CLEAR INPUT (ADM2914-1)

Latch Clear Threshold Input High, V

LATCH

(IH)

1.2 V

Latch Clear Threshold Input Low, V

LATCH

(IL)

0.8 V

LATCH

Input Current, I

LATCH

±1 A

LATCH

> 0.5 V

DISABLE INPUT (ADM2914-2)

DIS Input High, V

DIS(IH)

1.2 V

DIS Input Low, V

DIS(IL)

0.8 V

DIS Input Current, I

DIS

1 2 3 A V

DIS

> 0.5 V

TIMER CHARACTERISTICS

TIMER Pull-Up Current, I

TIMER(UP)

−1.3 −2.1 −2.8 A V

TIMER

= 0 V

−1.2 −2.1 −2.8 A T

= −40°C to +125°C

TIMER Pull-Down Current, I

TIMER(DOWN)

1.3 2.1 2.8 A V

TIMER

= 1.6 V

1.2 2.1 2.8 A T

= −40°C to +125°C

TIMER Disable Voltage, V

TIMER(DIS)

−180 −270 mV Referenced to V

OUTPUT VOLTAGE

Output Voltage High,

, V

1 V

= 2.3 V; I

= −1 A

Output Voltage Low,

, V

0.1 0.3 V

= 2.3 V; I

= 2.5 mA

0.01 0.15 V

= 1 V; I

= 100 A

THREE-STATE INPUT SEL

Low Level Input Voltage, V

0.4 V

High Level Input Voltage, V

1.4 V

Pin Voltage When Left in High-Z State, V

0.7 0.9 1.1 V I

SEL

= ±10 A

0.6 0.9 1.2 V T

= −40°C to +125°C

SEL High, Low Input Current, I

SEL

±25 A

Maximum SEL Input Current, I

SEL(MAX)

±30 A SEL tied to V

or GND

The maximum voltage on the V

pin is limited by the input current. The V

pin has an internal 6.5 V shunt regulator and, therefore, a low impedance supply greater

than 6 V may exceed the maximum allowed input current. When operating from a higher supply than 6 V, always use a dropper resistor.

ADM2914 Data Sheet

Rev. F | Page 4 of 16

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

−0.3 V to +6 V

UV, OV

−0.3 V to +16 V

TIMER −0.3 V to (V

+ 0.3 V)

VLx, VHx, LATCH, DIS, SEL

−0.3 V to +7.5 V

10 mA

Reference Load Current (I

REF

) ±1 mA

, I

10 mA

Storage Temperature Range −65°C to +150°C

Operating Temperature Range −40°C to +125°C

Lead Temperature (Soldering, 10 sec) 300°C

Stresses at or above those listed under Absolute Maximum

Ratings may cause permanent damage to the product. This is a

stress rating only; functional operation of the product at these

or any other conditions above those indicated in the operational

section of this specification is not implied. Operation beyond

the maximum operating conditions for extended periods may

affect product reliability.

Table 3. Thermal Resistance

Package Type θ

Unit

16-Lead QSOP 104 °C/W

ESD CAUTION

Data Sheet ADM2914

Rev. F | Page 5 of 16

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

VH1

VL1

VH2

VL2

TIMER

SEL

LATCH

VH3

VL3

VH4

REF

VL4

GND

ADM2914-1

TOP VIEW

(Not to Scale)

08170-002

VH1

VL1

VH2

VL2

TIMER

SEL

DIS

VH3

VL3

VH4

REF

VL4

GND

ADM2914-2

TOP VIEW

(Not to Scale)

08170-011

Figure 2. ADM2914-1 Pin Configuration Figure 3. ADM2914-2 Pin Configuration

Table 4. Pin Function Descriptions

Mnemonic

Pin No. ADM2914-1 ADM2914-2 Description

1 VH1 VH1

Voltage High Input 1 and Voltage High Input 2. If the voltage monitored by VH1 or VH2 drops below

0.5 V, an undervoltage condition is detected. Connect to V

when not in use.

3 VH2 VH2

2 VL1 VL1

Voltage Low Input 1 and Voltage Low Input 2. If the voltage monitored by VL1 or VL2 rises above 0.5 V,

an overvoltage condition is detected. Tie to GND when not in use.

4 VL2 VL2

5 VH3 VH3

Voltage High Input 3 and Voltage High Input 4. The polarity of these inputs is determined by the state

of the SEL pin (see Table 5). When the monitored input is configured as a positive voltage and the

voltage monitored by VH3 or VH4 drops below 0.5 V, an undervoltage condition is detected.

Conversely, when the input is configured as a negative voltage and the input drops below 0.5 V, an

overvoltage condition is detected. Connect to V

when not in use.

7 VH4 VH4

6 VL3 VL3

Voltage Low Input 3 and Voltage Low Input 4. The polarity of these inputs is determined by the state of

the SEL pin (see Table 5). When the monitored input is configured as a positive voltage and the voltage

monitored by VL3 or VL4 rises above 0.5 V, an overvoltage condition is detected. Conversely, when the

input is configured as a negative voltage and the input rises above 0.5 V, an undervoltage condition is

detected. Tie to GND when not in use.

8 VL4 VL4

9 GND GND Device Ground.

10 REF REF

Buffered Reference Output. This pin is a 1 V reference that is used as an offset when monitoring

negative voltages. This pin can source or sink 1 mA, and drive loads up to 1 nF. Larger capacitive loads

may lead to instability. Leave unconnected when not in use.

Overvoltage Reset Output. OV

is asserted low if a negative polarity input voltage drops below its

associated threshold or if a positive polarity input voltage exceeds its threshold. The ADM2914-1 allows

OV to be latched low. The ADM2914-2 holds OV low for an adjustable timeout period determined by

the TIMER capacitor. This pin has a weak pull-up to VCC and can be pulled up to 16 V externally. Leave

this pin unconnected when not in use.

Undervoltage Reset Output. UV

is asserted low if a negative polarity input voltage exceeds its

associated threshold or if a positive polarity input voltage drops below its threshold. UV

is held low for

an adjustable timeout period set by the external capacitor tied to the TIMER pin. The UV

pin has a weak

pull-up to V

and can be pulled up to 16 V externally via an external pull-up resistor. Leave this pin

unconnected when not in use.

LATCH

Latch Bypass Input/Clear Pin. When pulled high, the OV latch is cleared. When held high, the OV

output has the same delay and output characteristics as the UV output. When pulled low, the OV

output is latched when asserted. (Applies only to the ADM2914-1.)

DIS

and UV Disable Input. When pulled high, the OV and UV outputs are held high irrespective of the

state of the VHx and VLx input pins. However, if a UVLO condition occurs, the OV

and UV outputs are

asserted. This pin has a weak internal pull-down (2 µA) to GND. Leave this pin unconnected when not

in use. (Applies only to the ADM2914-2.)

14 SEL SEL

Input Polarity Select. This three-state input pin allows the polarity of VH3, VL3, VH4, and VL4 to be

configured. Connect to V

or GND, or leave open to select one of three possible input polarity

configurations (see Table 5).

15 TIMER TIMER

Adjustable Reset Delay Timer. Connect an external capacitor to the TIMER pin to program the reset

timeout delay. Refer to Figure 15 in the Typical Performance Characteristics section. Connect this pin to

to bypass the timer.

16 V

Supply Voltage. V

operates as a direct supply for voltages up to 6 V. For voltages greater than 6 V, it

operates as a shunt regulator. A dropper resistor must be used in this configuration to limit the current

to less than 10 mA. When used without the resistor, the voltage at this pin must not exceed 6 V. A 0.1

F bypass capacitor or greater should be used.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P17

ADM2914-1ARQZ

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Supervisory Circuits Quad UV/OV +/- VTG Supervisor

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