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MAX9928F, MAX9929F
-0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers
Ultra-Small, 6-Bump UCSP Current-Sense Amplifiers with True -0.1V to +28V Input Range
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Status
| Part Number |
Status |
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MAX9928F
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Active: In Production. |
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MAX9929F
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Active: In Production. See Ordering Information for details. |
Description
The MAX9928F/MAX9929F low-cost, uni-/bidirectional, high-side, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment. These devices feature a wide -0.1V to +28V input common-mode voltage range, low 20µA supply current with VOS less than 0.4mV, and a gain accuracy better than 1.0%. The input common-mode range is independent of the supply voltage, ensuring that the current-sense information remains accurate even when the measurement rail is shorted to ground.
The MAX9928F features a current output with a transconductance ratio of 5μA/mV. An external resistor converts the output current to a voltage, allowing adjustable gain so that the input sense voltage can be matched to the maximum ADC input swing. The MAX9929F has a voltage output and integrates a 10kΩ output resistor for a fixed voltage gain of 50V/V.
A digital SIGN output indicates direction of current flow, so the user can utilize the full ADC input range for measuring both charging and discharging currents.
The MAX9928F/MAX9929F are fully specified over the -40°C to +125°C automotive temperature range, and available in 6-bump UCSP™ (1mm x 1.5mm) and 8-pin µMAX® packages. The UCSP package is bump-to-bump compatible with the MAX4372_EBT.
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Data Sheet
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An evaluation kit is available: MAX9928EVKIT
Key Features
- Wide -0.1V to +28V Common-Mode Range, Independent of Supply Voltage
- 2.5V to 5.5V Operating Supply Voltage
- 20µA Quiescent Supply Current
- 0.4mV (max) Input Offset Voltage
- Gain Accuracy Better than 1% (max)
- SIGN Output Indicates Current Polarity
- Transconductance and Gain Versions Available
- 5µA/mV (MAX9928F)
- 50V/V (MAX9929F)
- Pin Compatible with the MAX4372 in UCSP
- Available in Ultra-Small, 3x2 UCSP (1mm x 1.5mm) and 8-Pin µMAX Packages
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Applications/Uses
- General-System/Board-Level Current Monitoring
- Monitoring Charge/Discharge Currents in Portable/Battery-Powered Systems
- Notebook Computers
- Precision Current Sources
- Smart-Battery Packs/Chargers
- Smart-Cell Phones
- Super Capacitor Charge/Discharge
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Key Specifications:
| Current Sense Amplifiers |
| Part Number |
CMVR
(V) |
CMVR
(V) |
VCC
(V) |
VCC
(V) |
ICC
(µA) |
Bi-Dir. Curr. Sense |
VSENSE_FS
(mV) |
VOS @25°C
(µV) |
Gain |
Gain Accuracy @25°C
(%) |
BW
(kHz) |
Comp-
arators |
Oper. Temp.
(°C) |
Package/Pins |
Budgetary Price |
| min |
max |
min |
max |
typ |
recomm. |
max |
max |
@ -3dB |
See Notes |
| MAX9928F |
-0.1 |
28 |
2.5 |
5.5 |
20 |
Yes |
+/-50 |
400 |
5 µA/mV |
1 |
150 |
0 |
-40 to +125 |
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$0.85 @1k |
| MAX9929F |
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50 V/V |
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$0.94 @1k |
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See All Current Sense Amplifiers (36)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Operating Circuit
Application Notes
Product Guides
Reliability Reports
| Show FIT data for: |
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| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX9928FABT+
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Active |
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UCSP;6 pin;1.6 mm²
Outline Drawing:21-0097 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: B6+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9928FABT+T
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Active |
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UCSP;6 pin;1.6 mm²
Outline Drawing:21-0097 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: B6+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9928FABT+TG45
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Active |
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UCSP;6 pin;1.6 mm²
Outline Drawing:21-0097 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: B6+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9928FAUA+
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Active |
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µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9928FAUA+T
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Active |
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µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9929FABS+TG45
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N/A |
No Longer Available |
MAX9928FABT+T
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UCSP;
Land Pattern: Not Available
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-40°C to +125°C
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See data sheet
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| MAX9929FABT+
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Active |
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UCSP;6 pin;1.6 mm²
Outline Drawing:21-0097 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: B6+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9929FABT+T
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Active |
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UCSP;6 pin;1.6 mm²
Outline Drawing:21-0097 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: B6+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9929FABT+TG45
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Active |
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UCSP;6 pin;1.6 mm²
Outline Drawing:21-0097 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: B6+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9929FAUA+
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Active |
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µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
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Part Number
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Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX9929FAUA+T
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Active |
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µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Document Ref.: 19-4251
Rev 2;
2011-05-04
This page last modified: 2011-05-04
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