A1321 2 3 Datasheet PDF

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Description

A1321, A1322, and A1323 Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

Discontinued Product This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available.

Date of status change: October 31, 2011 • for the A1321EUA-T and the A1321LUA-T use the A1324LUA-T • for the A1321ELHLT-T and the A1321LLHLT-T use the A1324LLHLX-T • for the A1322LUA-T use the A1325LUA-T • for the A1322LLHLT-T use the A1325LLHLX-T • for the A1323EUA-T and the A1323LUA-T use the A1326LUA-T • for the A1323LLHLT-T use the A1326LLHLX-T

NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative.

Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.

A1321, A1322, and A1323 Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation Features and Benefits

Description

▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪

Temperature-stable quiescent output voltage Precise recoverability after temperature cycling Output voltage proportional to magnetic flux density Ratiometric rail-to-rail output Improved sensitivity 4.5 to 5.5 V operation Immunity to mechanical stress Solid-state reliability Robust EMC protection

The A132X family of linear Hall-effect sensor ICs are optimized, sensitive, and temperature-stable. These ratiometric Hall-effect sensor ICs provide a voltage output that is proportional to the applied magnetic field. The A132X family has a quiescent output voltage that is 50% of the supply voltage and output sensitivity options of 2.5 mV/G, 3.125 mV/G, and 5m V/G. The features of this family of devices are ideal for use in the harsh environments found in automotive and industrial linear and rotary position sensing systems.

Packages: 3 pin SOT23W (suffix LH), and 3 pin SIP (suffix UA)

Each device has a BiCMOS monolithic circuit which integrates a Hall element, improved temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail lowimpedance output stage. A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The high frequency clock allows for a greater sampling rate, which results in higher accuracy and faster signal processing capability. This technique produces devices that have an extremely stable quiescent output voltage, are immune to mechanical stress, and have precise Continued on the next page…

Not to scale

Functional Block Diagram V+

Amp

Filter

Dynamic Offset Cancellation

VCC

Out

Offset

Gain 0.1 µF

Trim Control

GND

A1321-DS, Rev. 23

VOUT

Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

A1321, A1322, and A1323

Description (continued) recoverability after temperature cycling. Having the Hall element and an amplifier on a single chip minimizes many problems normally associated with low-level analog signals. Output precision is obtained by internal gain and offset trim adjustments made at end-of-line during the manufacturing process.

The A132X family is provided in a 3-pin single in-line package (UA) and a 3-pin surface mount package (LH). Each package is available in a lead (Pb) free version (suffix, –T) , with a 100% matte tin plated leadframe.

Selection Guide Packing1

Mounting

7-in. reel, 3000 pieces/reel

Surface Mount

Bulk, 500 pieces/bag

SIP through hole

7-in. reel, 3000 pieces/reel

Surface Mount

Bulk, 500 pieces/bag

SIP through hole

Part Number A1321ELHLT-T2 A1321EUA-T3 A1321LLHLT-T2 A1321LUA-T3 A1322LLHLT-T2 A1322LUA-T3 A1323EUA-T3 A1323LLHLT-T2 A1323LUA-T3

7-in. reel, 3000 pieces/reel

Surface Mount

Bulk, 500 pieces/bag

SIP through hole

Bulk, 500 pieces/bag

SIP through hole

7-in. reel, 3000 pieces/reel

Surface Mount

Bulk, 500 pieces/bag

SIP through hole

Ambient, TA (ºC)

Sensitivity, Typ. (mV/G)

–40 to 85 5.000 –40 to 150 –40 to 150

3.125

–40 to 85 –40 to 150

2.500

1Contact

Allegro for additional packing options. 2This variant is in production, however, it has been deemed Pre-End of Life. The product is approaching end of life. Within a minimum of 6 months, the device will enter its final, Last Time Buy, order phase. Status change: January 31, 2011. Suggested replacements: for the A1321ELHLT-T and the A1321LLHLT-T use the A1324LLHLX-T, for the A1322LLHLT-T use the A1325LLHLX-T, and for the A1323LLHLT-T use the A1326LLHLX-T. 3Variant is in production but has been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of the variant is currently restricted to existing customer applications. The variant should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Status change: January 31, 2011.

Absolute Maximum Ratings Characteristic

Symbol

Notes

Rating

Units

8

V

*Additional

Supply Voltage

VCC

current draw may be observed at voltages above the minimum supply Zener clamp voltage, VZ(min), due to the Zener diode turning on.

Output Voltage

VOUT

8

V

Reverse Supply Voltage

VRCC

–0.1

V

Reverse Output Voltage

VROUT

–0.1

V

IOUT

10

mA

Output Sink Current Operating Ambient Temperature

TA

–40 to 150

ºC

Maximum Junction Temperature

TJ(max)

165

ºC

Tstg

–65 to 170

ºC

Storage Temperature

Range L

Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

2

Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

A1321, A1322, and A1323

Pin-out Drawings

Package UA

Package LH 3

1

2

1

2

3

Terminal List Symbol VCC VOUT GND

Number Package LH Package UA 1 1 2 3 3 2

Description Connects power supply to chip Output from circuit Ground

Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

3

A1321, A1322, and A1323

Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

DEVICE CHARACTERISTICS1 over operating temperature (TA) range, unless otherwise noted Characteristic Symbol Test Conditions Min. Electrical Characteristics; VCC = 5 V, unless otherwise noted Supply Voltage Vcc(op) Operating; Tj < 165°C 4.5 Supply Current Icc B = 0, Iout = 0 – Quiescent Voltage Vout(q) B = 0, TA = 25ºC, Iout = 1 mA 2.425 Vout(H) B = +X, Iout = –1 mA – Output Voltage3 Vout(L) B = –X, Iout = 1 mA – Output Source Current Limit3 Iout(LM) B = –X, Vout → 0 Supply Zener Clamp Voltage VZ Icc = 11 mA = Icc(max) + 3 Output Bandwidth BW Clock Frequency fC Output Characteristics; over VCC range, unless otherwise noted A1321; Cbypass = 0.1 μF, no load A1322; Cbypass = 0.1 μF, no load Noise, Peak-to-Peak4 VN A1323; Cbypass = 0.1 μF, no load Output Resistance Rout Iout ≤ ±1 mA Output Load Resistance RL Iout ≤ ±1 mA, VOUT to GND Output Load Capacitance CL VOUT to GND

Typ.2

Max.

Units

5.0 5.6 2.5 4.7 0.2

5.5 8 2.575 – –

V mA V V V

–1.0 6 – –

–1.5 8.3 30 150

– – – –

mA V kHz kHz

– – – – 4.7 –

– – – 1.5 – –

40 25 20 3 – 10

mV mV mV Ω kΩ nF

1 Negative

current is defined as conventional current coming out of (sourced from) the specified device terminal. data is at TA = 25°C. They are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual units, within the specified maximum and minimum limits. 3 In these tests, the vector X is intended to represent positive and negative fi elds sufficient to swing the output driver between fully OFF and saturated (ON), respectively. It is NOT intended to indicate a range of linear operation. 4 Noise specification includes both digital and analog noise. 2 Typical

Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

4

A1321, A1322, and A1323

Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

MAGNETIC CHARACTERISTICS1,2 over operating temperature range, TA; VCC = 5 V, Iout = –1 mA; unless otherwise noted Characteristics Symbol Test Condition Min Typ3 Max A1321; TA = 25ºC 4.750 5.000 5.250 A1322; TA = 25ºC 2.969 3.125 3.281 Sensitivity5 Sens A1323; TA = 25ºC 2.375 2.500 2.625 Delta Vout(q) as a funcVout(q)(ΔT) Defined in terms of magnetic flux density, B – – ±10 tion of temperature Ratiometry, Vout(q) Vout(q)(ΔV) – – ±1.5 Ratiometry, Sens ΔSens(ΔV) – – ±1.5 Positive Linearity Lin+ – – ±1.5 Negative Linearity Lin– – – ±1.5 Symmetry Sym – – ±1.5 UA Package Delta Sens at TA = max5 ΔSens(TAmax) From hot to room temperature Delta Sens at TA = min5 ΔSens(TAmin) From cold to room temperature Sensitivity Drift6 SensDrift TA = 25°C; after temperature cycling and over time LH Package Delta Sens at TA = max5 ΔSens(TAmax) From hot to room temperature

Units4 mV/G mV/G mV/G G % % % % %

–2.5 –6 –

– – ±2

7.5 4 –

% % %

–5

–

5

%

Delta Sens at TA = min5 ΔSens(TAmin) From cold to room temperature –3.5 – 8.5 % Sensitivity Drift6 SensDrift TA = 25°C; after temperature cycling and over time – ±2 – % 1 Additional information on characteristics is provided in the section Characteristics Definitions, on the next page. 2 Negative current is defined as conventional current coming out of (sourced from) the specified device terminal. 3 Typical data is at T = 25°C, except for ΔSens, and at x.x Sens. Typical data are for initial design estimations only, and assume optimum A manufacturing and application conditions. Performance may vary for individual units, within the specified maximum and minimum limits. In addition, the typical values vary with gain. 4 10 G = 1 millitesla. 5 After 150ºC pre-bake and factory programming. 6 Sensitivity drift is the amount of recovery with time.

Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

5

Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

A1321, A1322, and A1323

Characteristic Definitions Quiescent Voltage Output. In the quiescent state (no magnetic field), the output equals one half of the supply voltage over the operating voltage range and the operating temperature range. Due to internal component tolerances and thermal considerations, there is a tolerance on the quiescent voltage output both as a function of supply voltage and as a function of ambient temperature. For purposes of specification, the quiescent voltage output as a function of temperature is defined in terms of magnetic flux density, B, as: ΔVout(q)(ΔΤ) =

Vout(q)(ΤΑ) – Vout(q)(25ºC)

ΔVout(q)(ΔV) =

(4)

and the percent ratiometric change in sensitivity is defined as: ΔSens(ΔV) =

Sens(VCC) Sens(5V) VCC 5 V

× 100%

(5)

Linearity and Symmetry. The on-chip output stage is designed to provide a linear output with a supply voltage of 5 V. Although application of very high magnetic fields will not damage these devices, it will force the output into a non-linear region. Linearity in percent is measured and defined as: Lin+ =

Vout(+B) – Vout(q) × 100%

(6)

(2)

2B

Lin– =

× 100%

Vout(–B) –Vout(q)

(7) × 100%

2(Vout(–B / 2) – Vout(q) )

The stability of sensitivity as a function of temperature is defined as: Sens(25ºC)

× 100%

VCC 5 V

2(Vout(+B / 2) – Vout(q) )

Vout(–B) – Vout(+B)

Sens(ΤΑ) – Sens(25ºC)

Vout(q)(VCC) Vout(q)(5V)

(1)

Sensitivity. The presence of a south-pole magnetic field perpendicular to the package face (the branded surface) increases the output voltage from its quiescent value toward the supply voltage rail by an amount proportional to the magnetic field applied. Conversely, the application of a north pole will decrease the output voltage from its quiescent value. This proportionality is specified as the sensitivity of the device and is defined as:

ΔSens(ΔΤ) =

The percent ratiometric change in the quiescent voltage output is defined as:

Sens(25ºC)

This calculation yields the device’s equivalent accuracy, over the operating temperature range, in gauss (G).

Sens =

Ratiometric. The A132X family features a ratiometric output. The quiescent voltage output and sensitivity are proportional to the supply voltage (ratiometric).

and output symmetry as: (3) Sym =

Vout(+B) –Vout(q) × 100%

(8)

Vout(q) – Vout(–B)

Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

6

Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

A1321, A1322, and A1323

Typical Characteristics

150

125

115

85

25

-20

0

Average Supply Current (I CC) vs Temperature Vcc = 5 V

8 7.5 7 6.5 6 5.5 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0

-40

ICC (mA)

(30 pieces, 3 fabrication lots)

TA (°C)

Average Positive Linearity (Lin+) vs Temperature Vcc = 5 V

Average Negative Linearity (Lin–) vs Temperature Vcc = 5 V

105

104

104

103

103

102

102

101

Lin– (%)

100 99

101 100 99

98

98

97

97

96

96

150

125

115

85

25 TA (°C)

Average Ratiometry, VOUT(q)(ΔV) vs Temperature

Average Ratiometry, ΔSens (ΔV), vs Temperature 101

101

4.5 to 5.0V 5.5 to 5.0V

100.8

100.8 4.5 to 5.0 V 5.5 to 5.0 V

100.6

100.6 100.4

Ratiometry (%)

100.4

100.2

150

125

150

125

115

0

T A (°C)

85

99

25

99.2

99

-20

99.4

99.2

115

99.6

99.4

85

99.6

100 99.8

25

99.8

0

100

-40

100.2

-40

Ratiometry (%)

0

-40

TA (°C)

-20

95

150

125

115

85

25

0

-20

-40

95

-20

Lin+ (%)

105

TA (°C)

Continued on the next page... Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

7

Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

A1321, A1322, and A1323

Typical Characteristics, continued (30 pieces, 3 fabrication lots)

2.575

Average Absolute Quiescent Output Voltage, Vout(q), vs Temperature Vcc = 5 V

Quiescent Output Voltage, Vout(q), vs Vcc TA = 25°C 3 2.9

2.55

Vout(q) (V)

Vout(q) (V)

2.8 2.525 2.5 2.475

2.7 2.6

1321 1322 1323

2.5 2.4 2.3

2.45

2.2 2.1 2

150

125

115

85

25

0

-20

-40

2.425

4.5

TA (°C)

6

Average Absolute Sensitivity, Sens, vs Temperature Vcc = 5 V

5.5

Average Sensitivity, Sens, vs Vcc TA = 25°C 6

5.5

5.5 5

5 4.5 A1322

4

Sens (mV/G)

Sens (mV/G)

5 Vcc (V)

A1321 A1323

3.5 3

4.5

1321 1322

4

1323

3.5 3 2.5 2

2.5

1.5 1

150

125

115

85

25

0

-20

-40

2

4.5

5 Vcc (V)

TA (°C)

10

8

8

6

6

4

4

2

ΔSens (%)

0 -2 -4

2 0 -2 -4

-6

150

125

85

25

150

125

115

TA (°C)

115

85

25

0

-20

-10

-40

-8

-10

0

-6

-8

-20

Vout(q)(ΔT) (G)

Average Delta Sensitivity, ΔSens, vs Temperature Δ in readings at each temperature are relative to 25°C Vcc = 5 V

-40

10

Average Delta Quiescent Output Voltage, Vout(q)(ΔT), vs Temperature Δ in readings at each temperature are relative to 25°C Vcc = 5 V

5.5

TA (°C)

Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

8

Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation

A1321, A1322, and A1323

THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic

Symbol